Heterogeneous Metal Oxide-Graphene Thorn-Bush Single Fiber as a Freestanding Chemiresistor

ACS Applied Materials & Interfaces
Ji-Soo JangIl-Doo Kim

Abstract

The development of freestanding fiber-type chemiresistors, having high integration ability with various portable electronics including smart clothing systems, is highly demanding for the next-generation wearable sensing platforms. However, critical challenges stemming from the irreversible chemical sensing kinetics and weak reliability of the freestanding fiber-type chemiresistor hinder their practical use. In this work, for the first time, we report on the potential suitability of the freestanding and ultraporous reduced graphene oxide fiber functionalized with WO3 nanorods (porous WO3 NRs-RGO composite fiber) as a sensitive nitrogen dioxide (NO2) detector. By employing a tunicate cellulose nanofiber (TCNF), which is a unique animal-type cellulose, the numerous mesopores are formed on a wet-spun TCNF-GO composite fiber, unlike a bare GO fiber with dense surface structure. More interestingly, due to the superior wettability of TCNF, the aqueous tungsten precursor is uniformly adsorbed on an ultraporous TCNF-GO fiber, and subsequent heat treatment results in the thermal reduction of a TCNF-GO fiber and hierarchical growth of WO3 NRs perpendicular to the porous RGO fiber (porous WO3 NRs-RGO fiber). The freestanding porous WO3 NRs...Continue Reading

References

Nov 7, 2009·Nature Nanotechnology·Virginia A DavisMatteo Pasquali
Feb 10, 2011·Biomacromolecules·Shinichiro IwamotoTadahisa Iwata
Mar 16, 2011·Angewandte Chemie·Ji Eun KimSang Ouk Kim
May 1, 2012·Nanotechnology·Shubhda SrivastavaT D Senguttuvan
Oct 24, 2014·Scientific Reports·Lijie XuShengzhong Frank Liu
Mar 2, 2016·Advanced Materials·Rekha NarayanSang Ouk Kim
Aug 19, 2017·ACS Nano·Won-Tae KooReginald M Penner

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Citations

Jul 25, 2019·Advanced Materials·Tong XuLiangti Qu
Sep 19, 2019·Nanoscale·Yancong QiaoTian-Ling Ren

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