Table of Content

15 May 2015, Volume 33 Issue 3

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2015, 33(3):  0-0. 

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Reflection of Recent Development of Bipolar Hosts Materials for OLED in Patent

ZHANG Huihui, WU Hao

2015, 33(3):  183-194.  DOI: 10.7517/j.issn.1674-0475.2015.03.183

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Bipolar hosts are the key point to improve the luminous efficiency of electroluminescent device. One novel type of structural classification method is put forward according to the structural construction principle of the bipolar hosts in this article. The main patent technology in recent years is reviewed through the main line of the structure characteristics and evolution of the bipolar hosts in this area. The primary concepts in structure design of these materials are extracted and summarized. At last the prospect of this field is presented.

A Turn-on Fluorescent Probe for α-Ketoglutaric Acid Based on Rhodamine B

JIAO Changhong, HE Ye, JIN Pengwei, ZHU Shiqin, ZHU Weihong

2015, 33(3):  195-202.  DOI: 10.7517/j.issn.1674-0475.2015.03.195

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As a dicarboxyl metabolite produced by living cells, α-ketoglutaratc acid (α-KA) can be converted to 2-hydroxyglutarate (2HG) which is confirmed to be associated with the acute myeloid leukemia (AML). In this paper, a rhodamine B-based turn-on fluroescent sensor for α-KA has been designed and synthesized, which is consist of rhodamine-B and hydrazino group. After a series of parallel optimization such as response time, pH and temperature, RBN shows an obvious turn-on fluorescence response to α-KA. In addition, the sensor exhibits good selectivity towards α-KA among 20 common amino acids, various dicarbonyl derivatives and reactive oxygen species.

A Study on Classifying Motor and Sensory Nerves Based on Microscopic Hyperspectral Imaging Technology

FANG Juan, LIU Hongying, CHEN Zenggan, XU Qintong

2015, 33(3):  203-210.  DOI: 10.7517/j.issn.1674-0475.2015.03.203

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In the nerve repair surgery, the correct identification of nerve fascicles is the key to achieve good repairing result. This article will apply microscopic hyperspectral imaging technology in nerve classification and do some experimental researches on the feasibility of nerve classification. The results showed that it had certain effect. First, the authors uses microscopic hyperspectral neural collecting system to get the rabbit's motor and sensory nerves' hyperspectral image data, and then did pre-processing. Second, we obtained endmembers by using the pure endmember extraction algorithm and got each category's characteristic spectrum. Last, we analyzed the characteristics and differences of spectrum to find suitable classification algorithms. Based on K-nearest neighbor classifier, the authors used two classic and simple distance measure algorithms involve euclidean distance and spectral angle match distance to do classification in the experimental data. The results gotten by analying the advantages and disadvantages of the two methods can lay an important foundation for seeking other appropriate and more targeted classification methods.

Effect of Phosphor Carriers on Fluorescence of Ruthenium Phenanthroline and Performance of Oxygen-sensitive Fluorescent Membranes

LI Jianxiong, ZUO Chen, CHEN Jianming, LI Bingwei

2015, 33(3):  211-217.  DOI: 10.7517/j.issn.1674-0475.2015.03.211

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To increase the dispersion of polar phosphor Ru(dpp)₃Cl₂ in apolar silicone rubber and produce oxygen-sensitive fluorescent membranes with high performance, fumed silica, precipitated silica and MQ resin were adopted as phosphor carriers to adsorb Ru(dpp)₃Cl₂ from solution, then added to polydimethylsiloxane and cast into fluorescent membranes. The adsorbing ability of the carrier to Ru(dpp)₃Cl₂ was evaluated with spectrophotometer and the effect of the carrier on the fluorescent characteristics of Ru(dpp)₃Cl₂ was analyzed with spectroscope. The effect of the carrier on the performance of the oxygen-sensitive fluorescent membranes was studied. Compared to the fluorescent spectrum of Ru(dpp)₃Cl₂ in ethanol solution, the fluorescent emission spectra of Ru(dpp)₃Cl₂ red shifted 20 nm after adsorbed on silica. Methyl group onto silica depressed the interaction of silica with Ru(dpp)₃Cl₂ and the amount of adsorbed Ru(dpp)₃Cl₂. MQ resin could reduce the red-shift of fluorescent emission spectrum more than 10 nm and increase the fluorescence intensity by 10 times. In oxygen-sensitive fluorescent membranes, MQ resin could increase the dispersion of Ru(dpp)₃Cl₂ in PDMS and improve the fluorescent output of the membranes.

The Effects of Chemical Sensitization on the PTG Materials Using Silver Benzotriazole as Silver Source

LI Qiuyan, QUAN Ying, LIANG Haiyan, ZHANG Le

2015, 33(3):  218-223.  DOI: 10.7517/j.issn.1674-0475.2015.03.218

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The effectiveness of chemical sensitization technology in conventional silver halide photography, like sulfer sensitization, gold sensitizatin, sufer-plus-gold sensitization, was researched for photothermographic materials using silver benzotriazole as silver source and water-coated polyvinyl alcohol as binder. It was found that conventional chemical sensitization used in ex-situ method photothermographic materials with silver bromide as photosensitizer had a good impact in improving the sensitivity, and the sulfur- plus-gold sensitization has the best effection. However, conventional chemical sensitization used in in-situ method photothermographic materials reduced the sensitivity, and the sulfur- plus-gold sensitization reduced most seriously.

A New Method on Analyzing the Aircraft Wreckage with LiDAR Systems

LIU Huili, SUN Huabo, ZHAO Haimeng, LUO Boren, ZHONG Minzhu, YAN Lei

2015, 33(3):  224-229.  DOI: 10.7517/j.issn.1674-0475.2015.03.224

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Aircraft accidents' rate is low, but the loss is generally serious when it happens. Effect records of the crash site and the wreckage can help follow-up analysis, rebuild the accident scene. But few studies can be found nowadays. In this paper, a LiDAR system is used to map and save the three-dimensional information of the accident scene. Combined with improved ICP algorithm, the point-clouds of aircraft and its wreckage can be registered accurately to analyze the deformation and forces of the components by comparison, which helps to find the cause of the crash. Compared with other methods or systems, this system is of higher accuracy, and achieves better results in three-dimensional reconstruction.

Synthesis of Methacrylate Copolymers Containing N-PMI and Their Application in Negative-type Photoresist

LIU Jingcheng, ZHENG Xiangfei, LIN Licheng, MU Qidao, SUN Xiaoxia, LIU Xiaoya

2015, 33(3):  230-237.  DOI: 10.7517/j.issn.1674-0475.2015.03.230

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Methacrylic Acid (MAA), Methyl Methacrylate (MMA), N-Phenylmaleimide (N-PMI) and Methacrylic Acid Cyclohexyl Ester (CHMA) were used to synthesize copolymer with different content of N-Phenylmaleide (N-PMI) through free radical polymerization to develop a prepolymer(PMMNC). Then a methacrylate copolymer G-PMMNC was prepared by reaction of the PMMNC and Glycidyl Methacrylate (GMA). Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance spectroscopy (¹HNMR), gel permeation chromatography (GPC), and differential scanning calorimetry (DSC) were used to characterize the structure and properties of copolymers. The results showed that the molecular weight and the glass transition temperature of copolymers increased with the increase of the content of N-PMI. Negative-photoresists based on G-PMMNC were prepared,the resolution of which could reach 40 μm, and have a good acid etching resistance.

A Spectral Prediction Model of Printer Based on RBF Neural Network

YU Haiqi, LIU Zhen, TIAN Quanhui

2015, 33(3):  238-243.  DOI: 10.7517/j.issn.1674-0475.2015.03.238

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A spectral prediction model of printer based on RBF (Radial Basis Function) neural network was proposed in this paper. Prediction accuracy of model is improved by extending the input variables of neural network. The extensions included cross value or square value of channel driven value. Experimental results show that introduction of [1 cmy] item can effectively improve the prediction precision and the generalization ability, introduction of [cm² cy² mc² my² yc² ym²] item can decrease the prediction precision and generalization ability of the network. Introduction of combination of [cmy]、[c²m²y²] and [cm cy my] item can achieve the optimized prediction accuracy and generalization ability. This combination terms can reach the colorimetric accuracy of 0.475 ΔE₀₀ and spectral accuracy of 0.43% RMSE of all samples. Thus, RBF neural network model with input variables of [1 cmy c²m²y² cm cy my c m y] is the most optimized model that meets spectral prediction with high resolution.

Research of Acetic Acid Environment Affect on the Acetate Film Physical Properties

SHI Meirong, LI Yuhu, ZHOU Yajun, WANG Zhaoyang, RONG Yan, JIA Zhihui

2015, 33(3):  244-250.  DOI: 10.7517/j.issn.1674-0475.2015.03.244

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The so-called "Acid Syndrome" produced by Hydrolysis of cellulose acetate film is one of the biggest challenge in preservation. No better treatment for it so far, and acetic acid produced by film itself degradation will seriously affect the film physical properties, but the research of film physical properties change by acetic acid was less. In this paper, through anolog experiment of acetic acid accumulation in airtight environment, and analyzed the effects of acetic acid on physical properties in film degradation process. The results showed that acetic acid can accelerate degradation of the film. With the acetic acid increased , the degree of distortion and degradation, moisture content, the emulsion layer hydrophilicity and folding endurance were all increased, but the tensile strength and thermal stability of the film decreased.

Development of Transparent Conductive Films Based on Printed Electronics

ZHAO Wenxiu, ZHOU Yihua, QIAN Jun

2015, 33(3):  251-263.  DOI: 10.7517/j.issn.1674-0475.2015.03.251

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The transparent conductive film (TCF) is a thin-film material with excellent conductivity and high transmittance in the visible range. In recent years, as the electronic products becoming more and more popular,transparent conductive films are getting more and more attention. In this paper, the disadvantages of the indium tin oxide (ITO) transparent conductive films which dominate the market currently are analyzed. And the researches carried out on the new type of transparent conductive film in recent years are also overviewed. The main research directions about the transparent conductive films in the field of printed electronics are summarized. One direction is improving the conventional doped metal oxide TCF, including the inkjet printing of ITO films or using other doped metal oxides. Another direction is to find new transparent conductive film material. And their latest progresses are summarized respectively.