Facile fabrication of Ag nanowires for capacitive flexible pressure sensors by liquid polyol reduction method.
Facile fabrication of Ag nanowires for capacitive flexible pressure sensors by liquid polyol reduction method.
复制标题
通过液体多元醇还原法轻松制造用于电容式柔性压力传感器的银纳米线。
DOI：
10.1088/2053-1591/aaa4ed
复制
发表时间：
2018
影响因子：
2.3
通讯作者：
Zhi Chen
中科院分区：
文献类型：
--
作者：
Xiongbang Wei;Yong Quan;Hongjuan Zeng;Wen Huang;Weizhi Li;Jiaxuan Liao;Zhi Chen
采用改进的液体多元醇还原法制备了银纳米线，并将其成功应用于电容式柔性压力传感器中。首先，从保护剂聚乙烯吡啶酮（PVP）的分子量、AgNO3与PVP的摩尔比、金属盐的阴离子浓度和反应温度四个方面对AgNWs的一维径向生长条件进行了优化。采用PVP-K-30、PVP-K-60和PVP-K-90三种保护剂，研究了保护剂聚合度对AgNWs一维径向生长的影响。设计了AgNO3与PVP的摩尔比分别为1:1、1:3和1:9的三种不同浓度，考察了PVP吸附量对AgNWs一维径向生长的影响。设计了0 mM NaCl、16 mM NaCl和32 mM NaCl三种浓度，研究了金属盐阴离子浓度对银纳米粒子成核和蚀刻的影响。在140°C、160°C和180°C三个不同的温度下，研究了反应温度对AgNWs生长的影响，并提出了合适的温度设计。本实验对不同条件下制备的AgNWs产物进行了紫外可见光谱和扫描电镜分析，并从合成机理和反应条件两方面对实验条件进行了优化。
The Ag nanowires (AgNWs) were prepared by improved liquid polyol reduction method, and the AgNWs were successfully applied to the capacitive flexible pressure sensors. Firstly, the one-dimensional radial growth conditions of AgNWs were optimized from four aspects of the molecular weight of the protective agent polyvinyl pyrrolidone (PVP), the molar ratio of AgNO3 and PVP, the anion concentration of the metal salt and the reaction temperature. The effect of polymerization degree of protective agent on one-dimensional radial growth of AgNWs was investigated by using three kinds of protective agents PVP-K-30, PVP-K-60 and PVP-K-90. Three different AgNO3 and PVP molar ratios of 1:1, 1:3 and 1:9 were designed, and the effects of PVP adsorption capacity on one-dimensional radial growth of AgNWs were investigated. Three concentrations of 0 mM NaCl, 16 mM NaCl and 32 mM NaCl were designed to study the effects of anion concentration of the metal salt on the nucleation and etching of silver nanoparticles. The effects of reaction temperature on the growth of AgNWs were studied at three different temperatures of 140 °C, 160 °C and 180 °C, and appropriate temperature design was proposed. In this experiment, the products of AgNWs prepared under various conditions were analyzed by UV–vis Spectrum and SEM, and the experimental conditions were optimized from the synthesis mechanism and reaction conditions.