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In this work, we investigate how hydrogen sensing performance of thermally evaporated MoO3 nanoplatelets can be further improved by RF sputtering a thin layer of tantalum oxide (Ta2O5) or lanthanum oxide (La2O3). We show that dissociated hydrogen atoms cause the thin film layer to be polarised, inducing a measurable potential difference greater than that as reported previously. We attribute these...
This paper reports on a highly sensitive electrochemical based heavy metal ion sensor obtained by using recently discovered liquid metal marbles. We present the procedure to form these liquid metal marbles with controlled coating density. We also show enhanced electrochemical sensitivity of these marbles towards heavy metal ions with excellent selectivity.
The gasochromic performance of WO3 nanotextured thin films coated with catalytic Pd or Pt layers were investigated for low concentration H2 sensing. The 25?? thick catalytic metals were deposited onto 200nm thick sputtered WO3 films. It was found that the Pd/WO3 thin films show superior gasochromic response when compared with Pt/WO3 thin films. Integrating the absorbance change over a range of visible...
In this paper, we present gas sensing properties of Pt/graphene-like nano-sheets towards hydrogen gas. The graphene-like nano-sheets were produced via the reduction of spray-coated graphite oxide deposited on SiC substrates by hydrazine vapor. Structural and morphological characterizations of the graphene sheets were analyzed by scanning electron and atomic force microscopy. Current-voltage and dynamic...
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