Conductive nonwetting flexible substrate

In this paper an easy method to prepare flexible conductive substrates has been demonstrated. The substrates are mainly PET (PolyEthyleneTerephthalate), on which AgNW (silver nanowire) were deposited by spin casting method. For adhesion purpose a common cosmetic material has been utilized. The material provides versatile features to these coated substrates, including robustness, hydrophobicity with transparent bracing of nanowires (NW) with the flexible substrate. Four probe conductivity measurement shows the resistivity is 12 Ω/cm and is comparable to that of commercially available indium tin oxide (ITO) coated substrates. This method is cheap, easy and can be used for different objectives like flexible thin film photovoltaic, light emitting diodes, photosensors etc.     

High performance of carbon nanotubes/silver nanowires-PET hybrid flexible transparent conductive films via facile pressing-transfer technique

To obtain low sheet resistance, high optical transmittance, small open spaces in conductive networks, and enhanced adhesion of flexible transparent conductive films, a carbon nanotube (CNT)/silver nanowire (AgNW)-PET hybrid film was fabricated by mechanical pressing-transfer process at room temperature. The morphology and structure were characterized by scanning electron microscope (SEM) and atomic force microscope (AFM), the optical transmittance and sheet resistance were tested by ultraviolet-visible spectroscopy (UV-vis) spectrophotometer and four-point probe technique, and the adhesion was also measured by 3M sticky tape. The results indicate that in this hybrid nanostructure, AgNWs form the main conductive networks and CNTs as assistant conductive networks are filled in the open spaces of AgNWs networks. The sheet resistance of the hybrid films can reach approximately 20.9 to 53.9 Ω/□ with the optical transmittance of approximately 84% to 91%. The second mechanical pressing step can greatly reduce the surface roughness of the hybrid film and enhance the adhesion force between CNTs, AgNWs, and PET substrate. This process is hopeful for large-scale production of high-end flexible transparent conductive films.     

A highly conductive and smooth AgNW/PEDOT:PSS film treated by hot-pressing as electrode for organic light emitting diode

A highly conductive, smooth and transparent electrode is developed by coating poly (3,4-ethylenedioxythiophene):poly (styrenesulfonate) (PEDOT:PSS) over silver nanowires (AgNWs) followed by a hot-pressing method. The hot-pressed AgNW/PEDOT:PSS film shows a low sheet resistance of 12 Ω/square, a transmittance of 83% at 550 nm and a smooth surface. The improvement of the conductivity and smoothness are ascribed to the fusion of nanowires resulted from the mechanical hot-pressing. The AgNW/PEDOT:PSS film on polyethylene naphthalate (PEN) substrate exhibits higher conductive stability against the bending test than commonly used indium tin oxide (ITO). Using the hot-pressed AgNW/PEDOT:PSS film as the anode, we have fabricated ITO-free organic light emitting diode with a maximum current efficiency of 58.2 cd/A, which is higher than the device with ITO anode. This proves that such AgNW/PEDOT:PSS film treated by hot-pressing is a promising candidate for flexible optoelectronic devices.     

纳米银线/还原石墨烯复合材料的制备与表征

用改进的Hummer法制备了氧化石墨烯(GD),并制备 了表面用聚乙烯吡咯烷酮修饰的纳米银线(AgNWs), 通过原位还原法将二者复合成一种新型的水溶性AgNWs/还原石墨烯(RGD)材料,克服了石 墨烯材料不易分散 的缺点。用X射线衍射(XRD)、紫外-可见分光(UV-vis)光度计、扫描电子显 微镜(SEM)和傅里 叶变换红外(FT-IR)光谱分析仪对样品结构和形貌进行了表征。结果表明,制备的AgNWs/RG D材料具有与前驱 体不同的物理参数,有望在非线性光学、光电传感器和生物抑菌等方面有良 好的表现。     

银纳米线晶种诱导法合成超长银纳米线及其分析表征

采用晶种诱导的方法合成了超长银纳米线,用扫描电镜(SEM)、透射电镜(TEM)、恒区电子衍射(SAED)、X射线衍射(XRD)和紫外可见光谱(UV-Vis)等表征手段考察了制备条件对晶种和银纳米线的影响.结果表明,AgNO3浓度对晶种和银纳米线的形貌有影响.在优化条件下,5 min内即可诱导合成长度为70~100μm,直径为90~200 nm的具有良好均一性的超长银纳米线.     

银纳米线的尺寸和添加量对导电银浆性能的影响

采用化学还原法制备了3种银纳米线,研究了银纳米线的添加量、直径和长度对银浆固化膜层导电性能及银浆流变性能的影响,并探索其作用机理。结果表明,由于银纳米线的电子导通桥梁作用和纳米尺寸效应的影响,添加少量(0.05%~0.2%)的银纳米线即可显著提高银浆固化膜层的导电性能,直径越细的银纳米线对银浆固化膜层导电性能的提升作用更明显。银纳米线的加入会影响银浆的流变性能。     

纳米银线柔性透明导电薄膜的制备及应用现状

纳米银线因拥有良好的导电性,优异的透光性、柔性,原料来源广等特点,被认为是透明导电薄膜领域的下一代新型材料,其制备研究日益受到人们的广泛关注。以此为基础,对纳米银线柔性透明导电薄膜的制备方法及其研究进展进行了简介,并对其发展及应用现状进行了展望。     

银纳米线的聚醇法制备及其在聚酯和玻璃基板上镀成的透明导电薄膜对比

以聚乙烯基吡咯烷酮(PVP)为稳定剂,聚乙二醇(EG)为还原剂,采用聚醇法[1]制备了银纳米线.根据硝酸银/PVP比例的不同制备了4种类型的银纳米线样品,其中样品D直径最均匀,杂质含量最低.通过改变硝酸银/PVP比例、加入速率和PVP分子量,可对对银纳米线的长度和直径进行控制,得到了小直径(17~100 nm)、大长度(30 nm到100μm以上)的银纳米线.采用XRD、SEM、TEM和紫外-可见光谱对银纳米线的结构进行了表征.采用不同径长比纳米银线混合,以聚对苯二甲酸二乙酯(PET)和玻璃为衬底,分别使用可扩展层压辅助溶液法和旋转涂布法制备了2种透明导电薄膜,其方阻分别为17和26?/sq,透光率分别为88%和80%.