Graphene Oxide Scrolls on Hydrophobic Substrates Fabricated by Molecular Combing and Their Application in Gas Sensing

Abstract

Well-aligned graphene oxide (GO) scrolls are prepared through the controlled folding/scrolling of single-layer GO sheets using molecular combing on hydrophobic substrates, such as aged gold substrate, polydimethylsiloxane film, poly(L-lactic acid) film, and octadecyltrimethoxysilane-modified silicon dioxide. As a proof of concept, the gas sensor fabricated with a single reduced GO scroll is used to detect NO(2) gas with a concentration as low as 0.4 ppm.

Graphene Field‐Effect Transistor and Its Application for Electronic Sensing

“…Good response could be observed upon exposure of device to NO 2 due to the p‐doping effect. And the detection limit for NO 2 was calculated to be 0.4 ppm . Based on this research, they prepared new GO architecture through hydrophilic‐hydrophobic micro‐pattern (Figure b,c).…”

“…a) AFM image of GO scrolls prepared on hydrophobic substrates. Reproduced with permission . Copyright 2012, John Wiley and Sons.…”

Comparative Study of Potential Applications of Graphene, MoS2, and Other Two-Dimensional Materials in Energy Devices, Sensors, and Related Areas

“…Few-layer graphene has been effectively used as electrochemical sensors for DNA bases (guanine, adenine, thymine, and cytosine), oxidase/dehydrogenase-related molecules (hydrogen peroxide (H 2 O 2 )/βnicotinamide adenine dinucleotide (NADH)), neurotransmitters (dopamine (DA)), and other biological molecules (ascorbic acid (AA), uric acid (UA), and acetaminophen (APAP)) etc 213,214. Well-aligned GO scrolls on hydrophobic substrates, such as the aged gold substrate, OTS)-modified silicon dioxide, have been used to detect NO 2 at a concentration as low as 0.4 ppm 215. Solution-processed RGO electrodes with a micropatterned RGO channel with high transparency shows good sensitivity in detecting proteins in the…”

Architecting Graphene Oxide Rolled‐Up Micromotors: A Simple Paper‐Based Manufacturing Technology

“…Until now, GO rolled‐up tubes were processed by strong sonication treatments, chemical microexplosion, nanomaterials modification, among others . As a result of such outstanding configuration along with the recognized properties of GO, GO‐based rolled‐up tubes have been explored in myriad of applications such as superlubricity, sensors, supercapacitors, batteries, or catalysis . Theoretical studies predict the use of GO in electromechanical actuation applications, which could make a step forward in the implementation of these structures in advanced devices by coupling selective membranes, electronics fields, and actuation …”