Nanoscale Chemical and Electrical Stabilities of Graphene-covered Silver Nanowire Networks for Transparent Conducting Electrodes.
The hybrid structure of Ag nanowires (AgNWs) covered with graphene (Gr) shows synergetic effects on the performance of transparent conducting electrodes (TCEs). However, these effects have been mainly observed via large-scale characterization, and precise analysis at the nanoscale level remains inadequate. Here, we present the nanoscale verification and visualization of the improved chemical and electrical stabilities of Gr-covered AgNW networks using conductive atomic force microscopy (C-AFM), Auger electron spectroscopy (AES), and X-ray photoelectron spectroscopy (XPS) combined with the gas cluster ion beam (GCIB) sputtering technique. Specifically by transferring island Gr on top of the AgNW network, we were able to create samples in which both covered and uncovered AgNWs are simultaneously accessible to various surface-characterization techniques. Furthermore, our ab initio molecular dynamics (AIMD) simulation elucidated the specific mechanistic pathway and a strong propensity for AgNW sulfidation, even in the presence of ambient oxidant gases.
Samsung Advanced Institute of Technology, Gyeonggi-do 443-803, Republic of Korea.
Seong Heon
SH
Kim
Samsung Advanced Institute of Technology, Gyeonggi-do 443-803, Republic of Korea.
Woon Ih
WI
Choi
Samsung Advanced Institute of Technology, Gyeonggi-do 443-803, Republic of Korea.
Kwang Hee
KH
Kim
Samsung Advanced Institute of Technology, Gyeonggi-do 443-803, Republic of Korea.
Dae Jin
DJ
Yang
Samsung Advanced Institute of Technology, Gyeonggi-do 443-803, Republic of Korea.
Sung
S
Heo
Samsung Advanced Institute of Technology, Gyeonggi-do 443-803, Republic of Korea.
Dong-Jin
DJ
Yun