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One-step, hydrothermal synthesized 3D sulfonated reduced graphene oxide hydrogel (S-RGOH) is employed to fabricate a chemical sensor with high sensitivity, good selectivity, fast response and reversibility toward several gases. Compared with unmodified RGOH counterparts, the 3D NaHSO3 functionalized S-RGOH sensor exhibits 61.3 and 58.9 times higher responses to NO2 and NH3 respectively. A low limit...
In this paper we present a method for sensing of chemical vapour based on scaling of resistance fluctuation of single layer graphene (SLG) field effect transistors. Increase of variance of resistance fluctuation of device in presence of chemical vapour makes noise a very sensitive tool for detection. Analysis of the effect of presence of chemicals in the ambience of graphene on the 1/f noise spectrum...
Seamless integration of functional nanomaterials on paper can boost the functionality of paper-based flexible electronics. In this article, we report the successful growth of zinc oxide nanowires (ZnO NWs) on paper substrate through a low-cost hydrothermal process. We experimentally confirm the necessity of ammonium hydroxide as assistant chemical in the growth solution. We quantify the growth rate...
In this paper, we present a single chip nanosensor composed of Single-Walled Carbon Nanotubes (SWNTs) integrated on complementary metal oxide semiconductor (CMOS) circuitry with custom designed on-chip amplifiers for chemical agent detection. The SWNTs were integrated on CMOS circuitry utilizing a low temperature and low voltage Dielectrophoretic (DEP) assembly process. Furthermore, we incorporated...
This study deals with the research of new platinum resistance thermometers for micro-calorimetric measurements. The aim of this study is to design a suitable topology of platinum thermometers for a potential micro-calorimetric sensor based on organic materials. The suitable topology of a pair of thermometers was designed for the future micro-calorimetric sensors. Further, various evaluation methods...
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