Conducting polymer of polypyrrole (PPy) was employed to functionalize the ordered silicon nanowire (SiNWs) with the aim to enhance gas-sensing response at room temperature (RT). A dual-MACE process was first developed to form loose SiNWs (LNWs) array facilitating uniform attachment of PPy on whole nanowire surface. The LNWs array functionalized with continuous PPy ultrathin film and discrete PPy nanoparticles, i.e., [email protected] and [email protected], were prepared respectively via vapor chemical polymerization (VCP) and liquid chemical polymerization (LCP) of pyrrole monomer (Py). Comparative investigations on the NH₃-sensing properties of the pristine SiNWs before and after dual-MACE treatment, and PPy-functionalized SiNWs of [email protected] and [email protected] were carried out at RT. It was found that PPy functionalization enhances the NH₃-sensing response of SiNWs-based sensors effectively. Formation of continuous PPy shell film is further found to result in more pronounced response enhancement when compared to the modification by discrete PPy NPs. The [email protected] and [email protected] respectively exhibit about 27 and 6 times response enhancement to 10 ppm NH₃ gas compared to the pristine one. The underlying NH₃-sensing mechanism for the PPy-functionalized SiNWs, especially for the remarkable response enhancement of [email protected] was demonstrated.

聚吡咯（PPy）的导电聚合物用于功能化有序硅纳米线（SiNWs），目的是增强室温（RT）下的气体传感响应。首次开发了双重MACE工艺以形成松散的SiNW（LNW）阵列，以促进PPy在整个纳米线表面上的均匀附着。分别通过吡咯单体（Py）的气相化学聚合（VCP）和液相化学聚合（LCP）制备了具有连续PPy超薄膜和离散的PPy纳米粒子功能化的LNWs阵列，即[电子邮件保护]和[电子邮件保护]。NH _3的比较研究在室温下对原始MSi进行双重MACE处理之前和之后的感光特性，以及[受电子邮件保护]和[受电子邮件保护]的PPy官能化SiNW。发现PPy功能化可有效增强基于SiNWs的传感器的NH ₃传感响应。与离散PPy NPs的修饰相比，进一步发现形成连续的PPy壳膜可导致更明显的响应增强。与原始气体相比，[受电子邮件保护]和[受电子邮件保护]分别对10 ppm NH ₃气体显示出约27倍和6倍的响应增强。已证明了PPy-官能化的SiNWs潜在的NH ₃传感机制，特别是对于[电子邮件保护]的显着响应增强。