Flexible and Transparent Silver Nanowires Integrated with a Graphene Layer-Doping PEDOT:PSS Film for Detection of Hydrogen Sulfide

Abstract

A flexible and transparent poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) film was doped with a silver nanowire (AgNW)-integrated graphene (GR) layer to improve the conductivity, which enhanced the sensitivity of the chemiresistive sensor for detection of hydrogen sulfide gas (H 2 S). The sheet resistance and transmittance of AgNWs/GR and AgNWs/GR/PEDOT:PSS films remain stable during more than 25 days in a room environment. The AgNWs/GR and AgNWs/GR/ PEDOT:PSS films show great flexibility that the sheet resistance remains stable after bending 1000 times. The AgNWs and PEDOT:PSS isolated by the GR film can be used repeatedly in H 2 S detection, which shows that the AgNW layer-doping PEDOT:PSS film has great potential ability in H 2 S detection. In addition, the bending test has little effect on the response of the AgNWs/GR/PEDOT:PSS film and the transmittance of AgNWs/GR/ PEDOT:PSS change a little after reaction with H 2 S due to addition of GR. This work presents a platform to inspire AgNW layer-doping PEDOT:PSS materials for highly sensitive chemiresistive sensor.

Improved electrothermal performance of graphene-carbon nanotubes composite films utilizing AgNWs coating method

“…The AgNWs were prepared according to our previous work [22,23]. PVP (0.32 g, MW = 58 000) and PVP (0.32 g, MW = 360 000) were mixed in 100 ml ethylene glycol, in a 250 ml flask at room temperature.…”

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

“…With the continuous development of flexible electronic devices and sensors in recent years, more and more flexible conductive materials have been developed, such as graphene, − conductive polymers, − and noble metal nanowires. − Although noble metal is relatively more expensive, AuNWs have been widely applied due to the advantages of strong electrochemical stability, high oxidation resistance, and outstanding biocompatibility compared with other metal nanowires. − There are various methods to prepare AuNWs, including ultrathin AuNWs prepared by the soft film plate method and gold alloy nanowires grown on other metal nanowires. − Among these materials, ultrathin AuNWs , prepared by the soft template method are a vital type of nanoscale material, which can be utilized in various electronic devices, including optical devices, enhanced electrocatalytic properties, gas detection, etc. However, two significant defects limit their application in the field of wearable devices.…”

One-step fabrication of highly stable, durable, adhesion enhanced, flexible, transparent conducting films based on silver nanowires and neutralized PEDOT:PSS

“…[54][55][56][57][58] However, the highly acidic nature of PEDOT:PSS (sulfonic acid groups of PSS) adversely impacts AgNWs via acidic corrosion. [69][70][71][72][73] To the best of our knowledge, only a few reports currently exist on the fabrication of TCFs from the hybrid of AgNWs with neutralized PEDOT:PSS to solve the corrosion stability problem of AgNWs. Chen et al 59 explored the multi-step fabrication of AgNWs/PEDOT:PSS TCFs using neutralized PEDOT:PSS (guanidine as a neutralizing agent) as the overcoating layer.…”