Loading...
[an error occurred while processing this directive]

Table of Content

    15 May 2016, Volume 34 Issue 3
    2016, 34(3):  0-0. 
    Asbtract ( 345 )   PDF (226KB) ( 1018 )  
    Related Articles | Metrics
    Synthesis, Properties and Applications of the Fluorescent Carbon Dots
    WANG Shengda, YUAN Nan, ZHU Zhifeng, JIANG Yang
    2016, 34(3):  203-218.  DOI: 10.7517/j.issn.1674-0475.2016.03.203
    Asbtract ( 1085 )   PDF (10035KB) ( 2679 )  
    References | Related Articles | Metrics

    As a novel carbon nano-luminescent material, fluorescent carbon dots are considerably concerned because of their excellent biocompatibility, good luminescence performance, simple synthesis process, low cost and so on, compared with conventional luminescent materials. They are potential candidates for the application in biological fluorescence calibration, medical sensors, phototheranostics and light-emitting devices. The new achievements of the synthesis method, fluorescence mechanism and applications of fluorescent carbon dots are demonstrated in this paper.

    Research Advancement of Preparation of SnS2 Nanosheets and Device Applications
    XIA Jing, WANG Lei, ZHU Dandan, LI Xuanze, MENG Xiangmin
    2016, 34(3):  219-232.  DOI: 10.7517/j.issn.1674-0475.2016.03.219
    Asbtract ( 759 )   PDF (3694KB) ( 2543 )  
    References | Related Articles | Metrics

    Two-dimensional (2D) semiconductors are emerging electronic materials with a graphene-like structure. They can be used in different technological fields owing to the excellent electrical, optical, magnetic, mechanical properties, and have become a new hot spot in material science in recent years. Among these 2D semiconductors, SnS2 is an environmentally-friendly electronic material composed of earth-abundant sulfur and tinelements. It has attracted a lot of attention due to the extensive application prospects in microelectronics, solar cells, photocatalysis and so on. This article mainly introduces research advancement of vapor deposition growth of SnS2nanosheets and application in fields of electronics and optoelectronics.

    Study of AFM Imaging and Characterization of Tumor Cells
    GAO Jingwei, HAN Dong
    2016, 34(3):  233-244.  DOI: 10.7517/j.issn.1674-0475.2016.03.233
    Asbtract ( 645 )   PDF (4081KB) ( 1452 )  
    References | Related Articles | Metrics

    This article describes the history of the development of an atomic force microscope and simply introduces the working principle, working mode of atomic force microscopy (AFM), imaging methods of living cells under physiological state, etc. A special presentation biotypes atomic force microscopy, high-speed atomic force microscope in biology research and application is given in the paper. AFM with improved scanning speed, scanning range and the scanning precision will provide a steady stream of power to cytology cancer research. This paper expounds the research progress in the field of atomic force microscopy in tumors, including atomic force microscopy in tumor cells, topography characteristics, stiffness, viscoelasticity. And we also prospected the application of the atomic force microscope in tumor diagnosis and anti-tumor drugs research.

    Preparation and Photocatalytic Performance of Fe Doped ZnO Hollow Microspheres
    WANG Meng, XIA Jing, ZHU Dandan, WANG Lei, MENG Xiangmin
    2016, 34(3):  245-251.  DOI: 10.7517/j.issn.1674-0475.2016.03.245
    Asbtract ( 585 )   PDF (3594KB) ( 1222 )  
    References | Related Articles | Metrics

    As an important Ⅱ-Ⅵ semiconductor, ZnO possesses a band gap around 3.37 eV and shows huge potential applications in optoelectronics, sensing, photocatalysis, electricity generation and so on. In this work, we successfully synthesized Fe doped ZnO hollow microspheres via simple ion exchange and thermal evaporation methods. The morphology, structure and composition of the product have been systematically investigated using scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray diffraction (XRD). Light absorption measurements indicated that Fe dopants can enhance the light absorption performance of ZnO in light wave band of 375~600 nm. Additionally, photocatalytic characterization demonstrated that Fe doped ZnO hollow microspheres can promote the photodegradation of Rhodamine B, implying that the as-synthesized Fe doped ZnO hollow microspheres are extraordinary photocatalysis.

    Hydrothermal Synthesis and Photocatalytic Properties of ZnS Microflowers
    JIANG Wei, WU Xiang
    2016, 34(3):  252-256.  DOI: 10.7517/j.issn.1674-0475.2016.03.252
    Asbtract ( 705 )   PDF (2241KB) ( 1618 )  
    References | Related Articles | Metrics

    ZnS microflowers have been synthesized by one step hydrothermal method. Morphologies and microstructures of the as-synthesized products were investigated by X-ray diffraction and Scanning Electron Microscope. At the same time, photocatalytic properties of the as-obtained products were also studied in detail. It showed that ZnS microflowers had excellent degradation efficiencies to methylene blue, eosin red and methyl orange under UV-light irradiation. Photocatalytic cycling experiment is done to study the stability and reusability of the photocatalyst by conducting cyclic reactions for five times for the photodegradation of MB,demonstrating that ZnS microflowers possess superior photocatalytic activity.

    Large-scale Synthesis of Silicon Nanowires on Molybdenum Nets for High-efficiency Photodegradation
    HUANG Ben, LI Xuanze, WANG Lei, XIA Jing, ZHU Dandan, MENG Xiangmin
    2016, 34(3):  257-264.  DOI: 10.7517/j.issn.1674-0475.2016.03.257
    Asbtract ( 659 )   PDF (4719KB) ( 1266 )  
    References | Related Articles | Metrics

    Si nano-materials are wildly used in the field of photocatalyst, solar cell, photodetector due to their excellent photo-absorption ability. So the controlled and large-scale synthesis of one dimensional Si nano-materials becomes the key which affects their applications. In this report, we used a simple chemical vapor deposition (CVD) method to grow large-scale Si nanowires (SiNWs) on molybdenum (Mo) nets substrate. And the characteristics of SiNWs were detailedly analyzed by scanning electron microscope, transmission electron microscope, X-ray diffraction and Raman spectrum. Moreover, the photocatalytic properties of as-grown SiNWs were examined by the photodegradation of Rhodamine B and Methylene Blue under low power ultraviolet (UV) light. In addition, the results show that SiNWs growing on Mo nets substrate have a high photodegration efficient for organic dyes.

    Fabrication of Silicon Nanowires Resonators with Silicon Layer Doped by High Concentration Boron
    LIU Yang, ZHANG Mingliang, JI An, WANG Xiaodong, YANG Fuhua
    2016, 34(3):  265-272.  DOI: 10.7517/j.issn.1674-0475.2016.03.265
    Asbtract ( 510 )   PDF (3786KB) ( 1277 )  
    References | Related Articles | Metrics

    Nanoelectromechanical systems (NEMS) were extensively studied due to their small volume, smart behavior and high reliability. The eigenfrequency of nanowire resonators could vibrate at very high frequencies (VHF), which possessed potential applications, including high performance sensors for mass, oscillators, and filter. However, to fabricate silicon nanowire resonators with uniform morphology, controllable structures, superb fabrication technique was required. Currently, it is urgent for a simple, repeatable, three-dimensional scale controllable silicon nanowire manufacturing process. In this article, a feasible IC compatible top-down process to fabricate silicon nanowires resonators based on heavy boron doping layer was studied. This process defined the controllable size of silicon nanowires using electron beam lithography and released the silicon nanowires resonators based on the etch-autostop of TMAH. SEM was used to characterize the prepared silicon nanowires resonators. The results demonstrated the reliability of the silicon nanowires fabricated based on heavy boron doping layer, which had uniform morphology and controllable, adjustable structures. This approach could generate silicon nanowires resonators at large area with controllable, high yield and low cost.

    Van der Waals Epitaxy and Photoluminescence of Two-Dimensional CdS Nanoplates
    ZHU Dandan, XIA Jing, WANG Lei, LI Xuanze, MENG Xiangmin
    2016, 34(3):  273-280.  DOI: 10.7517/j.issn.1674-0475.2016.03.273
    Asbtract ( 916 )   PDF (3777KB) ( 1936 )  
    References | Related Articles | Metrics

    Two-dimensional (2D) materials have been demonstrated for applications of electronic and optoelectronic devices due to their unique structures and excellent properties. Nevertheless, researches on 2D CdS materials have remained conspicuously absent. In this work, we present the first growth of 2D CdS nanoplates on mica substrates via van der Waals epitaxy. The morphology, thickness, structure and component of the products were systematically studied by scanning electron microscopy, transmission electron microscopy, atomic force microscopy, X-Ray powder diffraction and Raman spectroscopy. They all clearly indicate that the as-synthesized 2D nanoplates possess a single-crystalline hexagonal structure, and have a lateral size around several microns and height about several tens of nanometers. Our work may open up a new pathway for the synthesis of 2D nanostructures of other non-layered materials and make it possible for 2D non-layered materials to apply in high performance electronic and optoelectronic devices.

    Fabrication of Biocompatible Nanofibrious Scaffold by Electrospun TiO2 and Methacrylated Hyaluronic Acid(MeHA)
    LIU Sidi, ZHANG Junhu
    2016, 34(3):  281-287.  DOI: 10.7517/j.issn.1674-0475.2016.03.281
    Asbtract ( 786 )   PDF (3206KB) ( 1594 )  
    References | Related Articles | Metrics

    By observing the electron microscopy images, it is found that the bone of the body has abundant fiber micro-nano structure. Inspired by this observation, we designed bio-activating surface of titanium dioxide electrospun and constructed the fiber micro-nano structure at the same time which imitated bone surface. Considering the titanum dioxide(TiO2) electrospun possesses light-triggered property and non-toxic, we adopted the "top-down" one step method and synthesized MeHA to bio-activated the surfae of TiO2 electrospun, which was obtained through uv-irradiation(UV) by a simple way. Fourier infrared spectrum analysis showed that the surface of titanum dioxide(TiO2) electrospun grafted hyaluronic acid molecules successfully. By fluorescence and scanning electron microscopy (SEM) analysis, it shows that mesenchymal stem cells can growth well on the modified surface of TiO2 electrospun. This building method bio-activated the surface of TiO2 electrospun and imitated the bone surface through micro-nano fiber topology. The TiO2 electrospun can spin on different kinds of materials surface, so the surfaces of different materials would easily get bio-activated fiber surface structure which can be used for cell culture .These results suggested that TiO2 electrospun modified with MeHA are more suitable for implants and have large clinical potential.

    Nanomechanical Detection of Living Head and Neck Tissue Samplesby Atomic Force Microscopy
    WANG Zhou, LI Jing, GAO Jingwei, HAN Xinxiao, HUA Wenda, LIU Zhongqi, HAN Dong
    2016, 34(3):  288-296.  DOI: 10.7517/j.issn.1674-0475.2016.03.288
    Asbtract ( 516 )   PDF (5725KB) ( 1184 )  
    References | Related Articles | Metrics

    The biomechanical change in tumor and its microenvironment is one of the basic biological characteristics, which plays a key role in the processin oncogenesis and development of tumor. The stiffness is a more important biomechanical feature. In this paper, AFM is employed to address the nanomechanical properties of the living tissue sample from head and neck. Furthermore, the stiffness information is converted into the stiffness distribution. Then the curvature of the interface among different stiffness regions is analyzed.In situ analysis of mechanical properties of living head and neck tissue samples is expected to provide a diagnosis of benign and malignant lesions of the head and neck tissues.