Highly sensitive and wearable gas sensors consisting of chemically functionalized graphene oxide assembled on cotton yarn

Abstract

Highly sensitive and wearable chemical sensors for the detection of toxic gas molecules are given significant attention for a variety of applications in human health care and environmental safety. Herein, we demonstrated fiber-type gas sensors based on graphene oxide functionalized with organic molecules such as heptafluorobutylamine (HFBA), 1-(2-methoxyphenyl)piperazine (MPP), and 4-(2-keto-1-benzimidazolinyl)piperidine (KBIP) by assembling functionalized graphene oxide (FGO) on a single yarn fabric. These gas sensors of FGO on yarn exhibited extraordinarily higher sensitivity upon exposure to gas molecules than chemically reduced graphene oxide due to many active functional groups on the GO surface. Furthermore, the mechanical stability and chemical durability of the resulting gas sensors are well-maintained. Based on these results, we expected that our sensors with high sensitive and wearability will provide a good premise for wearable chemical sensors-based multidisciplinary applications.

Wearable Carbon Monoxide Sensors Based on Hybrid Graphene/ZnO Nanocomposites

“…Among them, cotton fabrics are currently highly researched, not only because of their excellent properties (i.e., high flexibility, low cost, high moisture absorbency, good mechanical strength, good biocompatibility, and biodegradability), but also due to the fact that these substrates can be integrated as smart clothing to support the advancement of industrial revolution 4.0 [26], [27]. Currently, surface-modified cotton fabrics have been applied for several wearable devices, including UV filter [28]- [30], superhydrophobic functional garment [31], flame resistance composite [32], anti-bacterial component [33], and gas sensors [34]- [37].…”

Adsorption and sensing of CO and NH3 on chemically modified graphene surfaces

“…[11][12][13][14][15] It is well established that pristine graphene is insensitive or chemically inert to the presence of almost all environmental gaseous molecules. 16,17 Therefore there is a lot of interest on adsorption on doped graphene and their application for use as sensors for gaseous species. [11][12][13][14][15]18,19 Some of the previous literature show that the interaction of the graphene with adsorbed gaseous species can drastically alter the electronic properties and therefore can be made use of, in the design of ultra-sensitive gas sensors.…”

Functionalized Graphene Derivatives: Antibacterial Properties and Cytotoxicity

“…Among all the innovative materials, graphene derivatives [1] have attracted a great deal of scientific interest in biomedicine and pharmacology sciences. Graphene, a single layer of sp 2 -hybridized carbon atoms arranged in a honeycomb two-dimensional (2-D) crystal lattice, exhibits excellent chemical-physical, biochemical [2], mechanical, and engineering properties, extremely useful for several applications in sensors [3] and optoelectronic devices [4], environmental monitoring tools [5], food quality control [6], and medical devices [7]. With particular regard to the fields of application that include food quality control and medicine field applications, the antibacterial features [8] and the biocompatibility properties toward the real matrixes (as food or normal human cell lines, organic tissue, and blood) represent a key point that nanomaterials must possess.…”