Berlin 2018 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 30: Heterostructures, interfaces, and surfaces

HL 30.9: Talk

Wednesday, March 14, 2018, 17:15–17:30, EW 202

Template-Assisted Fabrications of Regular Arrays of Nanostructures for Sensitive Gas-Sensing — •Shipu Xu, Huaping Zhao, Yang Xu, Rui Xu, Huanming Zhang, and Long Liu — Institut für Physik & IMN MacroNano (ZIK), Technische Universität Ilmenau, 98693, Ilmenau, Germany

Sensitive gas-sensing is a constant pursue for the development of gas sensors. Herein we show a gas sensor formed by a regular array of nanostructures to efficiently fulfill sensitive gas-sensing, where the regular array is prepared by template-assisted methods. The morphologies of the gas-sensors involve regular arrays of nanopores and nanorods, which are respectively prepared from the templates of colloidal monolayer and anodic aluminum oxide. An optimized sensitivity of the gas-sensor is achievable by adjusting structure parameters of the gas sensors: (i) the pore size for the nanoporous-film-based sensor and (ii) the nanorod length for the nanorod-array-based sensors. In a detection of ethanol gas, the optimized sensitivity of the SnO2 porous film and the SnO2 nanorod array can be characterized by a low detection limit at a ppm level. Base on the above, we confirm that the regular arrays of nanostructures prepared by template-assisted methods can realize the sensitive gas-sensing.