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Intricate nature of Pd nanocrystal-hydrogen interaction investigated using thermolysed Pd hexadecylthiolate films

Sagade, AA and Radha, B and Kulkarni, GU (2010) Intricate nature of Pd nanocrystal-hydrogen interaction investigated using thermolysed Pd hexadecylthiolate films. Sensors and Actuators, B: Chemical, 149. pp. 345-351. ISSN 0925-4005

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Abstract

Nanocrystalline Pd films are derived by thermolysing Pd hexadecylthiolate at different temperatures (195-250 °C) to obtain films with different resistances, 3-115 Ω. The films essentially consist of Pd nanocrystals (5-40 nm) amidst amorphous carbon as evidenced by electron microscopy and Raman measurements. The response to H is seen as a jump in the resistance which varied proportionally with the base resistance, the slope being ∼0.2. Interestingly, the change over from H to purging N (or Ar) atmosphere is accompanied by a kink-like feature in the electrical response, which is linked to depletion of hydrogen from the nanocrystal surface and its backfilling from the core. The presence of O in the purging atmosphere affects adversely the formation of the kink. © 2010 Elsevier B.V. 2 2 2 2

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:35
Last Modified: 08 Apr 2021 07:32
DOI: 10.1016/j.snb.2010.06.056