Nanometer-Thick Gold Nanowire Films with Spider-Web-Like Morphology as Transparent Conductors for Wearable Devices
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.