Apparent thermal conductivity of photoluminescent C-dot nanofluid

Ashkan Vatani, Peter L. Woodfield, Tak H. Kim, Charles Lemckert, Qin Li, Dzung Dao

Research output: Contribution to journalArticle

Abstract

Carbon nanodots (C-dots)are nanometer-sized particles of amorphous carbon that form highly stable water-based suspension if given the right surface treatment. Their size, stability and unique photoluminescent properties make them attractive candidates for tracer materials for use in heat transfer experiments. Here we measure the effective thermal conductivity of water containing 1.5 g/L (0.077% volume fraction)of fluorescent green carbon nanodots. In conflict with empirical predictions from nano-fluid literature but consistent with predictions from classical theories applied to nanofluid thermal conductivity enhancement, the results show no measurable difference between the thermal conductivity of the colloid and deionized water. This finding adds confirmation to the value of photoluminescent carbon nanodots for use as a water tracer in bench-top heat transfer experiments.

Original languageEnglish
Article number110948
Pages (from-to)1-5
Number of pages5
JournalJournal of Molecular Liquids
Volume286
DOIs
Publication statusPublished - 15 Jul 2019

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Thermal conductivity
thermal conductivity
Carbon
Water
carbon
water
Heat transfer
tracers
Deionized water
heat transfer
Amorphous carbon
Colloids
Surface treatment
Volume fraction
Suspensions
predictions
surface treatment
Experiments
seats
colloids

Cite this

Vatani, Ashkan ; Woodfield, Peter L. ; Kim, Tak H. ; Lemckert, Charles ; Li, Qin ; Dao, Dzung. / Apparent thermal conductivity of photoluminescent C-dot nanofluid. In: Journal of Molecular Liquids. 2019 ; Vol. 286. pp. 1-5.
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Apparent thermal conductivity of photoluminescent C-dot nanofluid. / Vatani, Ashkan; Woodfield, Peter L.; Kim, Tak H.; Lemckert, Charles; Li, Qin; Dao, Dzung.

In: Journal of Molecular Liquids, Vol. 286, 110948, 15.07.2019, p. 1-5.

Research output: Contribution to journalArticle

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T1 - Apparent thermal conductivity of photoluminescent C-dot nanofluid

AU - Vatani, Ashkan

AU - Woodfield, Peter L.

AU - Kim, Tak H.

AU - Lemckert, Charles

AU - Li, Qin

AU - Dao, Dzung

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AB - Carbon nanodots (C-dots)are nanometer-sized particles of amorphous carbon that form highly stable water-based suspension if given the right surface treatment. Their size, stability and unique photoluminescent properties make them attractive candidates for tracer materials for use in heat transfer experiments. Here we measure the effective thermal conductivity of water containing 1.5 g/L (0.077% volume fraction)of fluorescent green carbon nanodots. In conflict with empirical predictions from nano-fluid literature but consistent with predictions from classical theories applied to nanofluid thermal conductivity enhancement, the results show no measurable difference between the thermal conductivity of the colloid and deionized water. This finding adds confirmation to the value of photoluminescent carbon nanodots for use as a water tracer in bench-top heat transfer experiments.

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