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

Abstract

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.

Temperature-Sensitive Janus Particles PEG/SiO2/PNIPAM-PEA: Applications in Foam Stabilization and Defoaming

“…With the presence of dehydrating agent DCC and catalyst DMAP, the esterification reaction occurred between the hydroxyl group at the terminal of PEG 113 −OH and the carboxylic group at the terminal of BTPA, resulting in the formation of macro-chain transfer agent PEG 113 -CTA. The specific structure was determined by 1 H NMR (Figure S3b), with a number average molecular weight (M n ) of 6.5k (curve e, Figure 1a). The twoblock copolymer was synthesized at 70 °C using PEG 113 -CTA as the macro-chain transfer agent and AIBN as the initiator.…”

“…Gold nanomaterials show outstanding potential in catalytic performance. 1,2 Simultaneously, one of the focal points in the study of micromaterials and nanomaterials is Janus particles. Due to their unique structure and versatile characteristics, Janus particles have garnered considerable attention.…”

“…The composition was confirmed by 1 H NMR. 1 Synthesis of PEG-b-PNIPAM. RAFT-mediated radical polymerization of NIPAM was carried out with PEG 113 -CTA.…”

Tailored Morphology in Polystyrene/Poly(lactic acid) Blend Particles: Solvent’s Effect on Controlled Janus/Core–Shell Structures

“…Consequently, Janus films prepared via surface treatments have found applications in analytical testing, where their selective wetting behavior and surface chemistry enable efficient sensing and separation processes. 29,30 Moreover, in fields requiring precise purification and separation, these Janus films have demonstrated remarkable potential, offering novel solutions to longstanding challenges. 31 Another intriguing class of Janus interface materials is the superstructures composed of Janus particles.…”

“…One approach to creating Janus films involves the development of self-standing monolayers through precise surface treatments or functionalization of thin films. , This method allows for the controlled manipulation of surface properties, facilitating tailored interactions with various environments and substrates. Consequently, Janus films prepared via surface treatments have found applications in analytical testing, where their selective wetting behavior and surface chemistry enable efficient sensing and separation processes. , Moreover, in fields requiring precise purification and separation, these Janus films have demonstrated remarkable potential, offering novel solutions to longstanding challenges . Another intriguing class of Janus interface materials is the superstructures composed of Janus particles. , These particles, engineered to possess two distinct faces, self-assemble into monolayers at the interfaces of liquid–liquid and solid–liquid systems.…”