In Situ Growth of Gold Nanofilms with Branched Structures in the Presence of Organosulfur for High-Performance Flexible Electronics
作者：Minqiang Xia, Lingui Hu, Yulu Ye, Yunbo Li.
關鍵字：what are subjects Chemical structure Gold Heat treatment Metal nanoparticles Thin films
論文來源：期刊
具體來源：Langmuir
發表時間：2024年
Herein, a novel method is presented for the in situ growth of
gold nanofilms with branched structures in the presence of organosulfur.
The key feature in this approach is the Rayleigh instability of
ultrathin gold nanowires (AuNWs) without oleylamine (OAm), which allows
the ultrathin AuNWs to decompose into gold nanoparticles (AuNPs) and the
AuNPs to in situ grow into branched structures for
high-performance stability and electrical conductivity. The sheet
resistance of the gold nanofilms initially sharply decreased, whereas it
subsequently slightly increased with the concentration of CS(NH2)2
until it exceeded the optimal range. After undergoing a 10 min heat
treatment at 150 °C, the sheet resistance of the nanofilms was further
reduced to 18 Ω/sq, which could be maintained for more than five months.
The internal structure becomes fully grown and denser, forming a
branched structure after heat treatment. Only certain organosulfurs can
improve the electrical properties of the gold nanofilms, and the
mechanism of organosulfur in the in situ growth of gold nanofilms
with branched structures has also been presented. Overall, this novel
method provides a straightforward and convenient approach to obtaining
gold nanomaterials with branched structures, holding great potential
promise for applications in flexible electronics, catalysis, and energy
fields.