Low-Temperature Melting of Silver Nanoparticles in Subcooled and Saturated Water

Soochan Lee, Patrick Phelan, Robert A. Taylor, Ravi Prasher, Lenore Dai

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Continuous, laser-heated boiling heat transfer experiments with silver nanofluids were conducted to identify the nonequilibrium melting behavior of silver nanoparticles in de-ionized (DI) water. Experimental results with transmission electron microscopy (TEM) and dynamic light scattering (DLS) suggest that surface melting of silver nanoparticles (which have a bulk melting point of 961 °C) can occur at ambient pressure when particles are suspended in saturated, and even subcooled (e.g., <100 °C) water due to the localized (volumetric) heat absorption. These findings are supported by calculating a temperature-dependent Hamaker constant of silver nanofluid - i.e., the interaction between interfaces (Ag-melt-water) at the melting temperature. This finding is significant because of the difficulty to identify the melting of silver nanoparticles in water at present, even though it is important to understand such potential melting to use aqueous silver nanofluids in solar applications.

Original languageEnglish (US)
Article number052301
JournalJournal of Heat Transfer
Volume138
Issue number5
DOIs
StatePublished - May 1 2016

Fingerprint

Silver
Melting point
silver
melting
Nanoparticles
nanoparticles
Water
Melting
water
Dynamic light scattering
boiling
Boiling liquids
melting points
light scattering
heat transfer
Heat transfer
Transmission electron microscopy
heat
transmission electron microscopy
temperature

Keywords

  • boiling
  • dynamic light scattering (DLS)
  • Hamaker constant
  • heat transfer
  • nonequilibrium melting
  • silver nanofluid
  • transmission electron microscopy (TEM)

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Low-Temperature Melting of Silver Nanoparticles in Subcooled and Saturated Water. / Lee, Soochan; Phelan, Patrick; Taylor, Robert A.; Prasher, Ravi; Dai, Lenore.

In: Journal of Heat Transfer, Vol. 138, No. 5, 052301, 01.05.2016.

Research output: Contribution to journalArticle

@article{d79c735b78f5418980a953f4dd23a167,
title = "Low-Temperature Melting of Silver Nanoparticles in Subcooled and Saturated Water",
abstract = "Continuous, laser-heated boiling heat transfer experiments with silver nanofluids were conducted to identify the nonequilibrium melting behavior of silver nanoparticles in de-ionized (DI) water. Experimental results with transmission electron microscopy (TEM) and dynamic light scattering (DLS) suggest that surface melting of silver nanoparticles (which have a bulk melting point of 961 °C) can occur at ambient pressure when particles are suspended in saturated, and even subcooled (e.g., <100 °C) water due to the localized (volumetric) heat absorption. These findings are supported by calculating a temperature-dependent Hamaker constant of silver nanofluid - i.e., the interaction between interfaces (Ag-melt-water) at the melting temperature. This finding is significant because of the difficulty to identify the melting of silver nanoparticles in water at present, even though it is important to understand such potential melting to use aqueous silver nanofluids in solar applications.",
keywords = "boiling, dynamic light scattering (DLS), Hamaker constant, heat transfer, nonequilibrium melting, silver nanofluid, transmission electron microscopy (TEM)",
author = "Soochan Lee and Patrick Phelan and Taylor, {Robert A.} and Ravi Prasher and Lenore Dai",
year = "2016",
month = "5",
day = "1",
doi = "10.1115/1.4032310",
language = "English (US)",
volume = "138",
journal = "Journal of Heat Transfer",
issn = "0022-1481",
publisher = "American Society of Mechanical Engineers(ASME)",
number = "5",

}

TY - JOUR

T1 - Low-Temperature Melting of Silver Nanoparticles in Subcooled and Saturated Water

AU - Lee, Soochan

AU - Phelan, Patrick

AU - Taylor, Robert A.

AU - Prasher, Ravi

AU - Dai, Lenore

PY - 2016/5/1

Y1 - 2016/5/1

N2 - Continuous, laser-heated boiling heat transfer experiments with silver nanofluids were conducted to identify the nonequilibrium melting behavior of silver nanoparticles in de-ionized (DI) water. Experimental results with transmission electron microscopy (TEM) and dynamic light scattering (DLS) suggest that surface melting of silver nanoparticles (which have a bulk melting point of 961 °C) can occur at ambient pressure when particles are suspended in saturated, and even subcooled (e.g., <100 °C) water due to the localized (volumetric) heat absorption. These findings are supported by calculating a temperature-dependent Hamaker constant of silver nanofluid - i.e., the interaction between interfaces (Ag-melt-water) at the melting temperature. This finding is significant because of the difficulty to identify the melting of silver nanoparticles in water at present, even though it is important to understand such potential melting to use aqueous silver nanofluids in solar applications.

AB - Continuous, laser-heated boiling heat transfer experiments with silver nanofluids were conducted to identify the nonequilibrium melting behavior of silver nanoparticles in de-ionized (DI) water. Experimental results with transmission electron microscopy (TEM) and dynamic light scattering (DLS) suggest that surface melting of silver nanoparticles (which have a bulk melting point of 961 °C) can occur at ambient pressure when particles are suspended in saturated, and even subcooled (e.g., <100 °C) water due to the localized (volumetric) heat absorption. These findings are supported by calculating a temperature-dependent Hamaker constant of silver nanofluid - i.e., the interaction between interfaces (Ag-melt-water) at the melting temperature. This finding is significant because of the difficulty to identify the melting of silver nanoparticles in water at present, even though it is important to understand such potential melting to use aqueous silver nanofluids in solar applications.

KW - boiling

KW - dynamic light scattering (DLS)

KW - Hamaker constant

KW - heat transfer

KW - nonequilibrium melting

KW - silver nanofluid

KW - transmission electron microscopy (TEM)

UR - http://www.scopus.com/inward/record.url?scp=84956975896&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84956975896&partnerID=8YFLogxK

U2 - 10.1115/1.4032310

DO - 10.1115/1.4032310

M3 - Article

VL - 138

JO - Journal of Heat Transfer

JF - Journal of Heat Transfer

SN - 0022-1481

IS - 5

M1 - 052301

ER -