Improving hydrogen detecting performance of a Pd/n-LTPS/glass thin film Schottky diode with a TiO2 interface layer

Chou, Tse-Heng; Fang, Yean–Kuen; Chiang, Yen-Ting; Lin, Chih-Lung; Lin, K.J.

doi:10.1016/j.snb.2008.05.036

Cited by 5 publications

(1 citation statement)

References 31 publications

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“…It is well known that exposure of Pd/PdNi films to Hydrogen gas causes catalytic dissociation of Hydrogen molecules on the film surface. The dissociated Hydrogen atoms then diffuse into the PdNi films to form metal Hydrides, which have a lower workfunction compared to pristine PdNi [18,19]. Figure 3(a) depicts the band diagram of the PdNi-semiconducting CNT contact with typical values of the PdNi workfunction and the CNT electron affinity.…”

Section: Electrical and Raman Correlationmentioning

confidence: 99%

Modulation of Carbon Nanotube Metal Contacts in Gaseous Hydrogen Environment

Usgaocar

Chong

Groot

2014

Journal of Nanoscience

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Carbon nanotubes (CNTs), contacted by electrodeposited Pd0.59Ni0.41 alloys, are characterised using electrical measurements and Raman spectroscopy. The high workfunctions of Nickel and Palladium form an ohmic contact with the CNT valence band, but the contact properties change on Hydrogen exposure due to a reduction in the PdNi workfunction and the realignment of the PdNi Fermi level with the CNT band structure. A PdNi contacted semiconducting CNT exhibited significantly lower currents after Hydrogen exposure while a metallic CNT exhibited a small current increase. The semiconducting and metallic natures of the CNTs are confirmed by their Raman spectra. This study demonstrates a technique for modulating the PdNi-CNT contact and differentiating between semiconducting and metallic CNTs via contact modulation. It also provides experimental evidence of the theoretical allocation of features in the CNT Raman spectra.

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Section: Electrical and Raman Correlationmentioning

confidence: 99%