The facile fabrication of one-dimensional oxide nanostructures with desired and ordered patterns is challenging owing to the high costs and complexity of the fabrication methods. Herein, we suggested a novel fabrication method for one-dimensional oxide nanofiber (In2O3, Co3O4, and NiO) patterns. Grids, diamonds, and hexagrams nanofibers were fabricated via nearfield electrospinning (NFES) of a solution consisting of metal precursor and polyvinylpyrrolidone (PVP) followed by annealing at 600 °C for 5 hours. The optimum fabrication conditions were precisely controlled by the solution parameter (volatility, viscosity, conductivity) and the working parameters (velocity, working height) of NFES. Furthermore, the gas sensing characteristics of In2O3 grid nanopattern were investigated, which exhibited unprecedently high response toward 5 ppm trimethylamine (resistance ratio= 239) and selectivity (response ratio = 7) over ethanol interference at 300 °C. The facile, on-demand, direct writing of metal oxide nanostructures via nearfield electrospinning suggests a new strategy of patterning nanostructures which can be further used for various applications.

Highly sensitive and selective detection of TMA with In2O3 nanopatterns: Drawing on-demand one-dimensional nanostructures via nearfield electrospinning

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ACS Fall 2022

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.