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Temperature sensing using sulfur-doped carbon nanoparticles

Sadhanala, Hari Krishna and Senapati, Subrata and Nanda, Karuna Kar (2018) Temperature sensing using sulfur-doped carbon nanoparticles. In: CARBON, 133 . pp. 200-208.

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Official URL: http://dx.doi.org/ 10.1016/j.carbon.2018.03.039

Abstract

Temperature sensing at micro/nano scale with materials by direct fluorescence excitation is widely used in the recent years. Here, we report the green hydrothermal synthesis of sulfur-doped carbon nano-particles (S-CNPs) from inexpensive precursors such as sucrose and sodium thiosulfate. The resultant SC-NPs exhibit luminescence both in aqueous and solid states. The variation of steadyestate photoluminescence intensity of S-CNPs with temperature is investigated and the sensitivity of S-CNPs solid film with 355 nm excitation is found to be 2.63 x 10(-2) K-1, which is slightly higher than that with 532 nm excitation (2.15 x 10(-2) K-1). The activation energy is found to be 141.87 and 30.7 meV for 355 and 532 nm excitation, respectively. Similarly, the sensitivity of S-CNPs in solution is found to be 7.3 x 10(-3) K-1 and the the range of temperature is wider than physiological range (288-333 K) which suggests that S-CNPs can be used in the biological cells temperature sensing as well. Overall, the results suggest that S-CNPs can be used as nano thermometers. (C) 2018 Elsevier Ltd. All rights reserved.

Item Type: Journal Article
Additional Information: Copy right for this article belong to PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Id for Latest eprints
Date Deposited: 16 May 2018 15:58
Last Modified: 04 Oct 2018 15:17
URI: http://eprints.iisc.ac.in/id/eprint/59848

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