Kim, Il-Doo Jeon, Eun-Kyung Choi, Seung-Hoon Choi, Duck-Kyun Tuller, Harry L. 2024-01-20T18:32:10Z 2024-01-20T18:32:10Z 2021-09-05 2010-10 1385-3449 https://pubs.kist.re.kr/handle/201004/131052 SnO2 nanofiber mats fabricated through electrospinning followed by thermo-compression and subsequent calcination steps exhibited unique morphologies facilitating efficient gas transport into the layers combined with high surface area (similar to 73.5 m(2)/g, measured by BET) and small grain size (similar to 5-15 nm), which are well suited for ultrasensitive gas detection. Single SnO2 nanofibers were found to have a belt-like structure of closely packed nanocrystallites, facilitating excellent adhesion to the substrate and good electrical contact to the electrodes. I-V measurements of single SnO2 nanofibers displayed ohmic behavior with electrical conductivity of 1.5 S/cm. Gas sensor prototypes comprising a random network of SnO2 fibers exhibited high sensitivity when exposed to NO2 at 225A degrees C and CO at 300A degrees C. A detection limit of 150 ppb NO2 at 185A degrees C was estimated by extrapolating the sensitivity results obtained on exposure to higher gas concentrations, demonstrating potential of achieving ultra-sensitive gas detection at low operating temperatures enabled by the present synthesis method. English SPRINGER SENSORS NANOWIRES ARRAYS SENSITIVITY PERFORMANCE FABRICATION SURFACE OXIDES O-2 NO2 Electrospun SnO2 nanofiber mats with thermo-compression step for gas sensing applications Article 10.1007/s10832-010-9607-6 1 JOURNAL OF ELECTROCERAMICS, v.25, no.2-4, pp.159 - 167 JOURNAL OF ELECTROCERAMICS 25 2-4 159 167 scie scopus 000283137000010 2-s2.0-78049342729 Materials Science, Ceramics Materials Science Article SENSORS NANOWIRES ARRAYS SENSITIVITY PERFORMANCE FABRICATION SURFACE OXIDES O-2 NO2 Electrospinning Sensor SnO2 Nanofiber mats