期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 45, 页码 39464-39474出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b10908
关键词
LPNE; galvanic replacement reaction; alloy metal; hollow nanowire; sensor
资金
- Global Ph.D. Fellowship Program through the National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2016H1A2A1907718]
- Wearable Platform Materials Technology Center (WMC) - National Research Foundation of Korea (NRF) Grant of the Korean Government (MSIP) [2016R1A5A1009926]
- NRF of Korea - Ministry of Science, ICT and Fugure Planning [NRF-2015R1A2A1A16074901]
- National Science Foundation Devision of Chemistry [CHE - 1306928]
- National Research Foundation of Korea [2016H1A2A1907718] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Pd based alloy materials with hollow nanostructures are ideal hydrogen (H-2) sensor building blocks because of their double-H-2 sensing active sites (interior and exterior side of hollow Pd alloy) and fast response. In this work, for the first time, we report a simple fabrication process for preparing hollow Pd-Ag alloy nanowires (Pd@Ag HNWs) by using the electrodeposition of lithographically patterned silver nanowires (NWs), followed by galvanic replacement reaction (GRR) to form palladium. By controlling the GRR time of aligned Ag NWs within an aqueous Pd(2+)containing solution, the compositional transition and morphological evolution from Ag NWs to Pd@Ag HNWs simultaneously occurred, and the relative atomic ratio between Pd and Ag was controlled. Interestingly, a GRR. duration of 17 h transformed Ag NWs into Pd@Ag HNWs that showed enhanced H-2 response and faster sensing response time, reduced 2.5-fold, as compared with Ag NWs subjected to a shorter GRR period of 10 h. Furthermore, Pd@Ag HNWs patterned on the colorless and flexible polyimide (cPI) substrate showed highly reversible H-2 sensing characteristics. To further demonstrate the potential use of Pd@Ag HNWs as sensing layers for all-transparent, wearable H-2 sensing devices, we patterned the Au NWs perpendicular to Pd@Ag HNWs to form a heterogeneous grid-type metallic NW electrode which showed reversible H-2 sensing properties in both bent and flat states.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据