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    Fluorescence “Turn-on” Sensor for Cyanide Based on Phenazine Derivative
    YANG Lin, ZHANG Xiao, QU Weisong, HUA Jianli
    Imaging Science and Photochemistry    2014, 32 (1): 113-120.   DOI: 10.7517/j.issn.1674-0475.2014.01.113
    Abstract1522)      PDF (16099KB)(10072)       Save

    A chemodosimeter toward cyanide based on phenazine disulfonylindole (PDSI) was designed and synthesized. PDSI expressed obvious intramolecular charge transfer (ICT) absorption band at 750 nm. After the addition of cyanide, the C=N+ double bond was broken and neutralized and this ICT band dramatically decreased for the decreasing electron-withdrawing ability of indole moiety. Color change from green to light yellow could be observed which indicated that PDSI can realize real naked-eye detection of cyanide anion. On the other hand, a turn-on fluorescence signal was appeared after adding cyanide. The maximum emission band at 580 nm increased and achieved above 20-fold enhancement. Also, PDSI provided high sensitivity and selectivity with a low detection limit (20 nmol/L) which is below the maximum contaminant level for cyanide (MCL) in drinking water (0.02 ppm) set by the United States Environmental Protection Agency (EPA). Other anions except for cyanide caused no response signal.

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    Surface Plasmon Resonance (SPR)——The Principle of a New Method for Chemical Detection
    WU Shi-kang, WANG Peng-fei
    Imaging Science and Photochemistry    2008, 26 (2): 157-168.   DOI: 10.7517/j.issn.1674-0475.2008.02.157
    Abstract1397)      PDF (1835KB)(7505)       Save
    Recently, the phenomenon of surface plasmon resonance (SPR) has attracted more and more extensive attention due to its special application in the field of metallic nano-materials and to be used as a sensitive reporter for the detection of different chemical and bio-chemical species.In this paper, the mechanism for the formation of SPR was introduced in details. And some problems concerned how to use this type of reporter for detection were also discussed systematically.
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    Review of Progress in Printed Electronics Industry
    ZOU Jing
    Imaging Science and Photochemistry    2014, 32 (4): 342-381.   DOI: 10.7517/j.issn.1674-0475.2014.04.342
    Abstract1677)      PDF (11299KB)(6386)       Save

    Printed electronics have developed rapidly abroad in recent years. Many scientific achievements have been brought into production from laboratories, and printed electronics industry system has formed as a result. This article introduces organic materials, inorganic materials and technological equipments which are applied in printed electronics. A detailed description of electronic products and its applications are also listed in this article. The printing products have entered people's daily life in many aspects. Though the printed electronic industry is still in the initial stage and the market is not mature, it has a brilliant prospect in the future. The article also points out the attentions and supports from government are the key factor to promote the development of printed electronics industry abroad.

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    Conductive Ink and Its Application Technology Progress
    LI Luhai, MO Lixin, RAN Jun, XIN Zhiqing
    Imaging Science and Photochemistry    2014, 32 (4): 393-401.   DOI: 10.7517/j.issn.1674-0475.2014.04.393
    Abstract1172)      PDF (3007KB)(6158)       Save

    Printed electronics is a new and fast developing technology which applying the traditional printing technology into the electronic products manufacturing. And the printed electronics has broad prospects for development. Conductive ink, as the key materials and foundation of printed electronics, has attracted widespread attention. In this paper, the category, basic composition, used printing technologies and device of the conductive ink are overviewed. The research and developing trends of conductive ink are also expected. Firstly, applying of new functional materials (including CNT, grapheme, et al.) into conductive ink and improving the intrinsic and interconnected properties of such materials is one of the key problems. Meanwhile, solving the problem of interconnecting between the printed circuits and electronic devices is another key problem of conductive ink.

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    DEVELOPMENT OF SECOND GENERATIONAL PORPHYRIN-BASED PHOTOSENSITIZERS
    MA Jin-shi
    Imaging Science and Photochemistry    2002, 20 (2): 131-148.   DOI: 10.7517/j.issn.1674-0475.2002.02.131
    Abstract1583)      PDF (662KB)(5413)       Save
    The current state of seond generational prophyrin based photosensitizers used in photodynamic therapy (PDT) is reviewed,which are most chlorins in the stages of clinical and pre-clinical trials.The research on photophysical properties showed that they are powerful photodynamic drugs.Some biological molecule linked porphyrins and boronated derivatives are also presented,which may have good future used for phototherapeutic agents.
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    RECENT ADVANCE IN PHOTO-FENTON REACTION
    XIE Yin-de, CHEN Feng, HE Jian-jun, ZHAO Jin-cai
    Imaging Science and Photochemistry    2000, 18 (4): 357-365.   DOI: 10.7517/j.issn.1674-0475.2000.04.357
    Abstract1263)      PDF (1513KB)(5403)       Save
    The photo Fenton oxidation is an effecitve advanced oxidation process (AOP). It is gradually using in the treatment of organic pollutants in wastewater. This paper describes the recent advance in this field including the study of the oxidation mechanism, its ultilization in the environmental treatment and some new modified photo-Fenton methods.
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    Preparation of Three Types of Titanium Dioxides with Different Crystallite and the Photoreactivity
    LIU Song-cui, LÜ Kang-le, DENG Ke-jian, TANG Hong-mei, LI Xiao-fang
    Imaging Science and Photochemistry    2008, 26 (2): 138-147.   DOI: 10.7517/j.issn.1674-0475.2008.02.138
    Abstract1414)      PDF (1518KB)(5368)       Save
    Anatase (AT) nanoplates, club-shaped rutile (RT) and prism-shaped brookite (BT) TiO 2 were prepared on a large scale through hydrothermal treatment of Ti(SO 4) 2 or TiCl 4 at certain pH. The mean particle size of the prepared AT was about 10 nm, the smallest one among the three types of TiO 2, compared with 30—50 nm of BT and 50—70 nm of BT. The maximum responsive wavelength of AT, BT and RT was to about 375, 385 and 415 nm, respectively, and AT shows the strongest absorption in the range of UV light. The photooxidation activity evaluated from the photocatalytic degradation of X3B, an anionic organic dye, revealed that the relative photoreactivity of the TiO 2 samples was as follows: AT>RT>BT, which is consistant with the adsorption ability of the catalysts. The reasons that caused the differences in photoreactivity among the three types TiO 2 were also discussed.
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    THE MECHANISM AND APPLICATION OF HYBRID UV CURING SYSTEM
    CHEN Ming, CHEN Qi-dao, XIAO Shan-qiang, HONG Xiao-yin
    Imaging Science and Photochemistry    2001, 19 (3): 208-216.   DOI: 10.7517/j.issn.1674-0475.2001.03.208
    Abstract1577)      PDF (361KB)(5329)       Save
    Hybrid UV curing or dual curing consists of two or more kinds of polymerization or crosslinking reactions that take place in the same system, which is a novel approach to modify polymer materials in-situ. Hybrid UV curing system includes free radical-cationic hybrid UV curing system, Free radical-condensation polymerization system and free radical-free radical system. The mechanism and application of hybrid UV curing are reviewed in this paper.
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    Recent Progress in Synthesis and Properties of the Core-Shell Nanoparticles
    WANG Ying, WANG Hua, LI Rong, DU Yu-kou
    Imaging Science and Photochemistry    2010, 28 (1): 65-78.   DOI: 10.7517/j.issn.1674-0475.2010.01.65
    Abstract1405)      PDF (1677KB)(5253)       Save
    As an important branch of composite nanoparticles,core-shell nanoparticles have received great concern due to their versatility of optics,catalysis,megnetism recently.In this paper,a comprehensive review was presented on the core-shell nanoparticles including the preparation,application, and then the development trends of core-shell nanoparticles were also proposed.
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    Imaging Science and Photochemistry    1998, 16 (3): 274-288.   DOI: 10.7517/j.issn.1674-0475.1998.03.274
    Abstract1270)      PDF (833KB)(5244)       Save
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    Novel Inherently Conducting Polymer Acting as Antistatics
    XU Jing-kun, HU Xiu-jie, PU Shou-zhi, SHEN Liang, CHEN Ping
    Imaging Science and Photochemistry    2005, 23 (3): 232-238.   DOI: 10.7517/j.issn.1674-0475.2005.03.232
    Abstract1223)      PDF (1057KB)(5132)       Save
    Among the antistatic coatings, inherently conducting polymer films were found to be one of the most useful. In this paper, the application of inherently conducting polymers in antistatic coating, such as polythiophenes and polyaniline, have been briefly reviewed, including their conducting mechanism, their characteristics and their development. The special notice was focused on poly (3,4-ethylenedioxythiophene)/polystyrene sulfonic acid, which succeeded in photographic materials as antistatic coating in the past decade.
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    PREPARE AND CHARACTERIZE FLUORESCENT POLYMERS BY CHEMICAL MODIFICATION OF POLY(STYRENE-CO-MALEIC ANHYDRIDE)(SMA)
    WANG Kang-cheng, HUANG Wei, XIA Ping, GAO Chao, YAN De-yue
    Imaging Science and Photochemistry    2002, 20 (3): 161-168.   DOI: 10.7517/j.issn.1674-0475.2002.03.161
    Abstract1298)      PDF (323KB)(5085)       Save
    Four kinds of fluorescent polymers have been prepared by chemical modification of poly(styrene co maleic anhydride)(SMA)with 2-amino-thiazole(1),2-amino-4-benzylthiazole(2),and 2 amino benzothiazole(3)respectively.These fluorescent polymers had good solubility and formed films easily like SMA.At the same time thermal stability was improved too.These polymers were characterized by GPC,DSC,FT-IR spectra and fluorescent spectra.Furthermore,the influences of solvents,concentration,acidity and substituting groups on the fluorescence of the polymers were investigated.
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    DYE-SENSITIZED NANOCRYSTALLINE SOLAR CELL
    LI Bin, QIU Yong
    Imaging Science and Photochemistry    2000, 18 (4): 336-347.   DOI: 10.7517/j.issn.1674-0475.2000.04.336
    Abstract1201)      PDF (2086KB)(5042)       Save
    The fundamental structure and the principle of the dye sensitized nanocrystalline solar cell are introduced.A summary of nanocrystalline TiO 2 film,dye sensitization and hole transporting materials is also given.
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    Research Progress of the Bottom Anti-reflective Coating for Photoresist
    WANG Kuan, LIU Jingcheng, LIU Ren, MU Qidao, ZHENG Xiangfei, JI Changwei, LIU Xiaoya
    Imaging Science and Photochemistry    2016, 34 (2): 123-135.   DOI: 10.7517/j.issn.1674-0475.2016.02.123
    Abstract1680)      PDF (3870KB)(5007)       Save

    With the rapid development of the micro-electronics industry, lithography technology has been moving forward to a higher resolution. Bottom anti-reflective coating has attracted great attention of researchers in terms of effectively eliminating the standing wave effect and the notching effect, improving the critical dimension uniformity and the patterning resolution. In this article, the photoresists and photolithography technique, and the classification, basic principle, etching process and development situation of the bottom anti-reflective coating are briefly reviewed. The latest research progress of the bottom anti-reflective coating is summarized in detail, especially the application of developable bottom anti-reflective coating in photoresist. Finally, the prospect and research directions of bottom anti-reflective coating in the future are also introduced.

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    Application of Photocatalytic Process in the Filed of Degrading Organic Dye Pollutants
    CUI Yu-min
    Imaging Science and Photochemistry    2004, 22 (6): 434-443.   DOI: 10.7517/j.issn.1674-0475.2004.06.434
    Abstract1330)      PDF (1115KB)(4648)       Save
    Photocatalytic process is one of the current technology with high efficiency and economizing energy for the removal of pollutant from water.The application of photocatalytic process in the filed of degrading organic dye pollutants is reviewed,based on the findings reported in the present literatures,including the present advance of photocatalytic destruction of organic dye pollutants,the mechanism of photocatalytic reaction,the kinetics of photocatalytic reaction and some problems existing in the progress of photocatalytic technology and so on.
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    PROGRESS IN TWO-PHOTON POLYMERIZATION AND ITS APPLICATIONS
    WANG Tao, SHI Meng-quan, LI Xue, WU Fei-peng
    Imaging Science and Photochemistry    2003, 21 (3): 223-230.   DOI: 10.7517/j.issn.1674-0475.2003.03.223
    Abstract1079)      PDF (339KB)(4540)       Save
    The progress of two photon polymerization which has been made in this research field is reviewed in this paper.The article is mainly concerend with the principle,the initiating systems,and the application of two photon polymerization.The progress of organic molecules which have large two photon cross section has been also discussed.
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    New Method for Preparation of Nanosilver Colloid Solutions and Their Enhancing Effect on Fluorescent Property
    ZHU Chun-yang, HE Jun-hui
    Imaging Science and Photochemistry    2008, 26 (6): 474-481.   DOI: 10.7517/j.issn.1674-0475.2008.06.474
    Abstract928)      PDF (1586KB)(4481)       Save
    Nanosilver colloid solution was prepared using natural cellulose fibers as solid phase dispersion matrix.Silver ions absorbed by the polar hydroxyl and ether groups of natural cellulose fibers were immersed in NaBH 4 solution of low concentration,and reduced into nanoparticles after desorp-tion from the fibers.Compared to traditional methods,our synthesis proceeded mildly and without any additional stabilizer.The silver nanoparticles prepared were monodisperse and stable for at least one year.The enhanced fluorescence indicated that without the hindrance of macromolecular stabi-lizer,nanosilver colloid solution gave remarkable enhancing effect on fluorescent property in relative low concentration of silver nanoparticles.
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    Preparation and Photocatalytic Property of ZnO Nanoparticles
    HAN Dong, REN Xiang-ling, CHEN Dong, TANG Fang-qiong, WANG Dong, REN Jun
    Imaging Science and Photochemistry    2005, 23 (6): 414-420.   DOI: 10.7517/j.issn.1674-0475.2005.06.414
    Abstract1402)      PDF (1100KB)(4460)       Save
    The ZnO nanoparticles have been made by precipitation method,and the hydroxypropylcellulose(HPC)was used as protective agent.TEM,XRD,UV-Vis and PL were used to characterize the ZnO nanoparticles.The forming mechanism of ZnO particles and the reaction effect factors were also discussed.Photodegradation of Rhodamine B in aqueous solution was investigated by using the ZnO particles as a photocatalyst.The results show that the ZnO particle is a good photocatalyst for degradation of dye solution.It will have potential applications in many areas such as environment protection.
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    PHOTOCATALYTIC DEGRADATION OF METHYL ORANGE ON NANOMETER TiO 2 COMPOSITE THIN FILMS
    LIU Fan-xin, CUI Zuo-lin, ZHANG Zhi-kun
    Imaging Science and Photochemistry    2003, 21 (2): 119-125.   DOI: 10.7517/j.issn.1674-0475.2003.02.119
    Abstract1057)      PDF (281KB)(4444)       Save
    The evenly transparent nanometer TiO 2 composite thin films prepared by Sol-Gel processing were deposited on glass substrates,porous ceramics substrates and glass fiber substrates.The photocatalytic degradation of methyl orange in water was studied in cultural dish with UV lamp as light source.The effects of the initial concentration of methyl orange,carrier surface of catalyst,the light time and the pH value were also investigated.And the semiconductor coupling thin films were carried out for the photocatalytic degradation of methyl orange.The results showed that the SnO 2 TiO 2 composite thin films had higher photocatalytic degradation efficiency than that of the La doping TiO 2 thin films.
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    PREPARATION OF NANOMETER Al 2O 3 PARTICLES
    TANG Fang-qiong, GUO Guang-sheng, HOU Li-ping
    Imaging Science and Photochemistry    2001, 19 (3): 198-201.   DOI: 10.7517/j.issn.1674-0475.2001.03.198
    Abstract917)      PDF (194KB)(4306)       Save
    Dispersed nano-Al 2O 3 particles were prepared by the hydrolysis of metal alkoxides in isopropanol solution with the method of two step. The effect of reactive condition on particle size and distribution was investigated systematically. The size of prepared particles varies from 20 nm to 100 nm along with the change of reactive condition.
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    THE MECHANISM AND MAIN REASONS OF PHOTOFADING OF ORGANIC DYES
    YU Xin-rui, ZHANG Shu-fen, YANG Jin-zong
    Imaging Science and Photochemistry    2000, 18 (3): 243-253.   DOI: 10.7517/j.issn.1674-0475.2000.03.243
    Abstract1345)      PDF (425KB)(4285)       Save
    The main study methods and present research conclusions of photofading of organic dyes were reviewed in this paper.The processes of photooxidation and photoreduction,factors, typical reaction procedures,and study means were systematically discussed.The methods to improve the light fastness by designing the structures of dye molecules and using additives were introduced.
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    Progress in the Studies of Medical Spectral Imaging Technique
    LI Qing-li
    Imaging Science and Photochemistry    2008, 26 (6): 507-515.   DOI: 10.7517/j.issn.1674-0475.2008.06.507
    Abstract978)      PDF (1285KB)(4121)       Save
    The spectral imaging technique was resulted from multispectral remote sensing in 1970s, which has successful applications in geology,agriculture,vegetation,environment,city,military, hydrology,and atmosphere.The potential applications of spectral imaging in the researching and clinical fields of biomedicine were dug in recent years.Recent progresses in the medical spectral imaging technique were reviewed.According to resolution,working model of detector and dispersive element,it was classified and introduced respectively.General situation and outlook on applications in cytogenics,immunofluorescence,histochemistry,and pathology of this new technique was also discussed.Furthermore,some comments were made about the latest trend and problems need to be solved of the medical spectral imaging technique.
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    Effect of Monomer Structure on Oxygen Inhibition of UV-Curing
    QIAN Xia-qing, WANG De-hai, LI Heng
    Imaging Science and Photochemistry    2013, 31 (4): 276-285.   DOI: 10.7517/j.issn.1674-0475.2013.04.004
    Abstract1501)      PDF (3134KB)(4054)       Save

    UV-curing of TMPTA and different ethoxylated TMPTA was studied respectively in air or nitrogen by UV-DSC.The oxygen inhibition in initial stage of curing was evaluated by the difference of the time when the curing rate growing fastest in different condition. The influence of the number of α-H in monomer and the monomer flow characteristics on oxygen inhibition was studied. The result shows that oxygen inhibition can be remitted by increasing the number of the ethyoxyls in monomer. Oxygen inhibition is related to the number of α-H and monomer viscosity.

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    Progress in Preparation of Functional Films by Spin-Coating
    WANG Dong, LIU Hong-ying, HE Jun-hui, LIU Lin-lin
    Imaging Science and Photochemistry    2012, 30 (2): 91-101.   DOI: 10.7517/j.issn.1674-0475.2012.02.91
    Abstract2615)      PDF (1595KB)(3987)       Save
    Spin-coating, as one of thin film preparation methods, has advantages of precise thickness control, high cost performance, energy saving, low pollution, etc. Thin films fabricated by spin-coating are widely applied in the areas of microelectronics, nanophotonics, biology, medicine, etc. In this paper, fundamental processes and estimation methodologies of key parameters for spin-coating are briefly introduced. Then a range of advanced applications and recent progresses of spin-coating technology within several disciplines are reviewed, including optics, microelectronics, etc. Finally, the developing trend of spin-coating technology is also discussed.
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    Imaging Science and Photochemistry    1998, 16 (1): 76-82.   DOI: 10.7517/j.issn.1674-0475.1998.01.76
    Abstract853)      PDF (394KB)(3908)       Save
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    Study on Photocatalytic Activity of Transition Metal Oxide Doped TiO 2 Photocatalysts
    WU Shu-xin, M A Zhi1, QIN Yong ning, JIA Li sh an, LI Hong rui
    Imaging Science and Photochemistry    2005, 23 (2): 94-101.   DOI: 10.7517/j.issn.1674-0475.2005.02.94
    Abstract1181)      PDF (1047KB)(3906)       Save
    Transition metal oxide doped TiO 2 photocatalysts MO x/TiO 2 (M=Cr,Mn,Fe,Co,Ni,Cu) were prepared with impregnation method. The photocatalytic activity was investigated with acetic acid as a photocatalytic degradation modal reactant. The results show that the photocatalytic activity of TiO 2 was improved after being doped by transition metal oxide and there exists an optimal supported value at which the degree of improved photocatalytic activity depends on formation enthalpy of corresponding oxide. Volcano profile relationship was found between the photocatalytic activity and the ratio of electronic affinity to ionic radius of transition metal ion.
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    Effects of Preparing Conditions on Structure and Electrical Properties of AZO Films
    ZHANG Tian-bao, LI Jin-pei
    Imaging Science and Photochemistry    2009, 27 (6): 452-461.   DOI: 10.7517/j.issn.1674-0475.2009.06.452
    Abstract1115)      PDF (729KB)(3892)       Save
    Transparent conducting aluminum-doped zinc oxide (AZO) thin films have been prepared by the sol-gel method on glass substrate. In this paper,the effect of two different ways of heat-treatment and anneal on structure and properties of thin films was compared and the influence of doping concentration and annealed temperature on structure and properties of AZO films was studied. It was found that high temperature,layer by layer annealing and doping of aluminum are all propitious to the AZO films with high crystalline and preferential c-axis orientation;and on the other hand high temperature and layer by layer annealing are demonstrated to be beneficial to the crystallite size enhancement,whereas which is hold back by doping of aluminum;in addition,the regular change of the electricity properties of thin films was revealed with the change of annealing temperature and doping concentration of aluminum. By analyzing the process of crystal growth inside AZO thin films,the conclusion was drawn in this paper that the difference of crystalline,crystallite orientation and crystallite size of AZO films was mainly caused by preparing conditions and growth habits of AZO crystallite.
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    THE CONTENT EFFECTS OF THE COMPONENTS ON THE PHOTOPOLYMERIZATION RATE OF HOLOGRAPHIC DATA STORAGE MATERIAL AND ITS RECORDING EXPERIMENTS
    SHI Meng-quan, WU Fei-peng, LI Miao-zhen, WANG Er-jian, LIU Guo-dong, HE Qing-sheng, WANG Jian-gang
    Imaging Science and Photochemistry    2002, 20 (5): 370-376.   DOI: 10.7517/j.issn.1674-0475.2002.05.370
    Abstract1222)      PDF (303KB)(3875)       Save
    In this paper, the relationship between the concentration of photosensitizing dye, initiator, chaintransfer agent, monomer, property of the binder polymers and the photosensitivity of holographic recording films are discussed.In a certain range, the rate of polymerization was increased with increasing the content of initiator, while optimized concentration of chaintransfer agent was found.Adding properly value of liquid monomer and the number of polymerized functional groups, the rate of polymerization was greatly increased.The monomers polymerized more rapidly in the polyvinyl acetate than in cellulose acetate film.High SNR holograms were obtained with this photopolymer by angularly multiplexing method.Thus, this photopolymer was suggested to be used in high density volume holographic recording.
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    EVOLUTION AND PROGRESS OF DEEP UV 248 nm PHOTORESISTS
    ZHENG Jin-hong, HUANG Zhi-qi, HOU Hong-sen
    Imaging Science and Photochemistry    2003, 21 (5): 346-356.   DOI: 10.7517/j.issn.1674-0475.2003.05.346
    Abstract1532)      PDF (401KB)(3796)       Save
    Deep UV lithography operating at 248 nm with use of chemical amplification resists has finally become a production technology.This paper describes the evolution and progress of the deep UV 248 nm photoresists from aspects of birth of chemical amplification technology,evolution of deep UV 248 nm resists in matrix resins and PAG,dissolution inhibitor,processing problems and solutions of them.
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    Solder Resist Ink for Printed Electronics and Its Developmental Tendency
    YANG Chao, CHANG Yu, YANG Zhenguo
    Imaging Science and Photochemistry    2014, 32 (4): 314-320.   DOI: 10.7517/j.issn.1674-0475.2014.04.314
    Abstract1287)      PDF (784KB)(3796)       Save

    Recent studies on solder resist ink for PCB manufacture and its developmental trendwere introducedand reviewed, focusing on solder resist ink for inkjet printing, solder resist for flexible electronics, water soluble photoimageable solder resist ink and white solder resist for LED package.

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    Development of Transparent Conductive Films Based on Inkjet-printed Graphene
    LUO Yan, ZHOU Yihua, QIAN Jun
    Imaging Science and Photochemistry    2016, 34 (5): 482-490.   DOI: 10.7517/j.issn.1674-0475.2016.05.482
    Abstract748)      PDF (2711KB)(3780)       Save

    With the widely use of large area, flexible electronic products by using inkjet printing have draw public attention.Graphene which can be obtained through physical or chemical methods, due to its good performance in optics and mechanism, has become the ideal material for making transparent conductive films. Because of its low cost and simple operation, inkjet printing technology has become the first choice for the large area flexible electronic products.This paper has a brief introduction of the preparation methods of graphene, and then analyses the pattern condition and control of inkjet printing, respectively. Finally this paper concludes the application progress and the trend of transparent conductive film.

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    THE REACTION OF PHOTOSENSITIZED ISOMERIZATION OF OLEFINS
    YOU Chang-jiang, XIE Rong, YANG Guo-qiang, LI Yi
    Imaging Science and Photochemistry    2003, 21 (2): 147-155.   DOI: 10.7517/j.issn.1674-0475.2003.02.147
    Abstract1150)      PDF (609KB)(3765)       Save
    Photoisomerization is one of the most important photoreactions.In this paper the mechanisms of photosensitization of olefins based on the perpendicular intermediate theory and potential energy surfaces are described.The determination of the triplet state energy and the selection of sensitizers are also discussed.
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    RESEARCH PROGRESS OF ONE-DIMENSIONAL INORGANIC NANOMATERIALS
    LI Yong-jun, LIU Chun-yan
    Imaging Science and Photochemistry    2003, 21 (6): 446-468.   DOI: 10.7517/j.issn.1674-0475.2003.06.446
    Abstract1055)      PDF (917KB)(3741)       Save
    One dimensional nanomaterials become a hot topic,largely due to their wide applications in areas of optics,electronics,environments and medicine.The article concerns the recent progress of one dimensional inorganic nanomaterials,and mainly illustrates their preparations,properties and applications.
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    Research Advancement of Liquid Metal Printed Electronics Ink
    WANG Lei, LIU Jing
    Imaging Science and Photochemistry    2014, 32 (4): 382-392.   DOI: 10.7517/j.issn.1674-0475.2014.04.382
    Abstract1118)      PDF (1509KB)(3723)       Save

    Printed electronics, which is based on the printing principle, is a newly emerging additive manufacturing technology. It has many advantages for electronics making such as large area, flexibility, personalized and low cost compared to conventional electronics manufacturing. There are generally three typical conductive inks used in printed electronics: conductive carbon ink, conductive polymer and metal conductive ink. However, post-treatments via high temperature curing process are often needed after such printing, so as to improve conductivities as well as reliability of these inks and the printed products. This makes the fabrication process somewhat complicated. Besides, the complex preparation process of the nano materials and inks thus formed also raised the application cost. As a new class of conductive ink, the liquid metal is becoming an important research area. Such ink material owns unique merits such as high electronic conductivity, simple preparation process, requesting no post-processing and so on. To further push forward the research along this direction, this article is dedicated to present an overview on the research advancement of the physical and chemical properties of the liquid metal ink and related typical printing methods over the world. Prospective directions worth of pursuing were outlined.

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    Progresses on Sensitization of Cationic Photoinitiators
    ZHANG Hong, LI Jian-xiong, LIU An-hua
    Imaging Science and Photochemistry    2013, 31 (1): 69-78.   DOI: 10.7517/j.issn.1674-0475.2013.01.009
    Abstract2135)      PDF (1060KB)(3697)       Save
    The curing rate and quantum efficiency of cationic photoinitiators are relatively low because the UV absorption of the photoinitiators ranges from 250 nm to 300 nm normally and does not match with the wavelength of light from UV light sources. To make the absorption red-shift, many efforts have been devoted onto the photosensitization of the photoinitiators. The achievements on the sensitization of the cationic photoinitiators have been summarized here. The sensitization is mainly based on the mechanisms as energy transfer, oxidation of free radical,electron transfer via exciplexes and addition fragmentation reaction. The methods adopted for the sensitization include adding photosensitizer,expanding molecular conjugation and attaching chromophore. The development of the photoinitiators and photosensitizers has been outlined and the applications of novel cationic photoinitiators and photosensitizers have been forecasted.
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    PROGRESS OF SYNTHESIZING PHTHALOCYANINES USED FOR PHOTODYNAMIC THERAPY
    YU Kai-chao, CHENG Hong, JIN Ling
    Imaging Science and Photochemistry    2003, 21 (2): 138-146.   DOI: 10.7517/j.issn.1674-0475.2003.02.138
    Abstract1091)      PDF (992KB)(3697)       Save
    The principle of photodynamic therapy(PDT) and the synthetic progress of phthalocyanine have been reviewed.The photobiochemical process of using phthalocyanines and photobleaching in PDT are also introduced.
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    Molecular Structure of Advanced Photoresists
    XU Jian, CHEN Li, TIAN Kai-jun, HU Rui, LI Sha-yu, WANG Shuang-qing, YANG Guo-qiang
    Imaging Science and Photochemistry    2011, 29 (6): 417-429.   DOI: 10.7517/j.issn.1674-0475.2011.06.417
    Abstract2334)      PDF (1420KB)(3684)       Save
    This article reviews the development of lithography technology and photoresists as well as their molecular structure for 193 nm and extreme ultravioletlithography (EUVL,the next generation lithography).Especially,we describe the recent research and development of EUV photoresists in detail for the purpose of being conducive to the domestic research on advanced photoresists.
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    Removing Ammonia Nitrogen from Water Using CdS/TiO 2 Photocatalyst
    CHEN Xiao-hui, LIU Li-fen, YANG Feng-lin, ZHANG Xing-wen, YU Jimmy C
    Imaging Science and Photochemistry    2007, 25 (2): 89-101.   DOI: 10.7517/j.issn.1674-0475.2007.02.89
    Abstract1034)      PDF (1105KB)(3639)       Save
    CdS/TiO 2 composite photocatalysts were prepared by using a sol-gel method.The catalysts were tested in removing ammonia pollutant in water by photocatalysis under the illumination of different light sources (UV,solar light,fluorescent lamp,indoor natural light).The effects of the CdS to TiO 2 ratio,catalyst concentration,addition of nitrite/nitrate on ammonium removal were also investigated.The test results showed that the optimum ratio of n(CdS)to n(TiO 2) is 0.17:1,with 50 mg/L ammonium in water,the removal of NH 4-N reaches 41.5% after 2 hours of irradiation.When purged with nitrogen gas,both ammonium nitrogen and nitrate/nitrite can be simultaneously removed.It is concluded that the ratio of n(CdS): n(TiO 2) is important for the synergetic photocatalytic activity and the extent of photo-corrosion of CdS was reduced in the mixed composite catalyst CdS/TiO 2.
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    Research Progress of Photonic Sintering Technology in Printable Electronics
    GU Weibing, LIN Jian, CHEN Zheng, CUI Zheng
    Imaging Science and Photochemistry    2014, 32 (4): 303-313.   DOI: 10.7517/j.issn.1674-0475.2014.04.303
    Abstract1085)      PDF (6280KB)(3594)       Save

    Photonic sintering is a kind of low-temperature, selective and non-contact sintering technology, which can sinter nano material ink on the transparent film substrate, realize the function of ink material, and finally obtain the physical properties of printed electronic devices. Photonic sintering technology includeslaser sintering, infrared sintering and pulsed light sintering. They also have their application features, which have been widely concerned in the field of printed electronics. This paper briefly introduces some research progress and application of photonic sintering technology, mainly focusing on the metallic nano conductive inks.

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    DISSOLUTION INHIBITION MECHANISMS OF POSITIVE PHOTORESIST BASED ON NOVOLAK-DNQ
    GAO Ying-xin, BAO Yong-zhong, HUANG Zhi-ming, WENG Zhi-xue
    Imaging Science and Photochemistry    2004, 22 (1): 33-43.   DOI: 10.7517/j.issn.1674-0475.2004.01.33
    Abstract1697)      PDF (450KB)(3563)       Save
    The mechanisms of dissolution inhibition of positive photoresist based on novolak(NVK)-diazonaphthoquinone(DNQ),including(1) the molecular hydrogen bonding interactions between novolak and DNQ;(2) mechanism of the azoxy- or azo-coupling reaction of DNQ-ester with novolak resin;(3) the two-step mechanism (also named static and dynamic inhibition) of dissolution inhibition;(4) mechanism of the surface of the photoresist;(5) the molecular dissolution of novolak related to the mechanism of inhibition,was reviewed in this paper.
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