writer：Jiahang Zhou; Lingui Hu; Minqiang Xia; Yixuan Du; Yunbo Li *
keywords：Wearable Device,Transparent Conductor,Gold Nanowire,Film
source：期刊
specific source：https://pubs.acs.org/doi/10.1021/acsanm.3c02482
Issue time：2023年

Ultrathin gold nanowires (AuNWs) play an important role in wearable

devices, biological detection, and other fields. However, their

applications in transparent conduction are limited due to high junction

resistance caused by the oleyamine (OAm) ligand and structural

instability caused by Rayleigh instability. A treatment method has been

proposed to eliminate these two defects via a hydrogen sulfide (H2S)

atmosphere and heat treatment. The nanowires are subjected to heat

treatment in a hydrogen sulfide atmosphere, which induces the nanowires

to fracture into gold particles (AuNPs) and evolve into a stable

spider-web-like structure. As a result, the conductivity of the treated

film is significantly improved, reaching 65 Ω/sq at 120 °C, 50 min, and

1000 ppm of H2S. The electrical properties of the film can be maintained

for more than one month. This method suggests a promising approach to

ultrathin AuNWs for excellent improvement of electronic conduction and

stability, which can be used in wearable devices.