Moreno Karla J, Moggio Ivana, Arias Eduardo, Llarena Irantzu, Moya Sergio E, Ziolo Ronald F, Barrientos Hector
Centro de Investigación en Química Aplicada, Boulevard Enrique Reyna 140, 25253, Saltillo, Mexico.
J Nanosci Nanotechnol. 2009 Jun;9(6):3987-92. doi: 10.1166/jnn.2009.215.
Silver nanoparticles have been functionalized in situ with the electrically conducting polymer, poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonate) (PEDOT:PSS) via colloidal synthesis. The formation of the functionalized silver nanoparticles, hereafter designated Ag(PEDOT:PSS), was confirmed by the appearance of the characteristic plasmon absorption peak at 420 nm in the UV-Vis spectrum of the aqueous suspension and by TEM analysis, where spherical particles with a mean size of around 8 nm (metallic core) were observed. Homogeneous thin films with granular topography, as observed by AFM, were prepared by self assembly. Electrical studies of the films showed an increase in electrical conductivity of three orders of magnitude with respect to the polymer film presumably due to the presence of the silver core. The conductive polymer/silver composite films also exhibit interesting electrochromic switching between blue and brown. These properties suggest the possibility of a variety of applications of Ag(PEDOT:PSS) films such as in electro optics devices, smart windows, amperometric sensors and capacitors.
通过胶体合成法，银纳米颗粒已与导电聚合物聚（3,4 - 亚乙基二氧噻吩）- 聚（苯乙烯磺酸盐）（PEDOT:PSS）进行原位功能化。功能化银纳米颗粒（以下称为Ag(PEDOT:PSS)）的形成通过水悬浮液的紫外 - 可见光谱中420 nm处特征等离子体吸收峰的出现以及透射电子显微镜（TEM）分析得以证实，在TEM分析中观察到平均尺寸约为8 nm的球形颗粒（金属核）。通过自组装制备了原子力显微镜（AFM）观察到的具有颗粒形貌的均匀薄膜。薄膜的电学研究表明，相对于聚合物薄膜，电导率增加了三个数量级，这可能是由于银核的存在。导电聚合物/银复合薄膜在蓝色和棕色之间还表现出有趣的电致变色切换。这些特性表明Ag(PEDOT:PSS)薄膜在诸如电光器件、智能窗、安培传感器和电容器等多种应用中的可能性。
