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Title: Effects of geometry and composition of soft polymer films embedded with nanoparticles on rates for optothermal heat dissipation

Abstract

Embedding soft matter with nanoparticles (NPs) can provide electromagnetic tunability at sub-micron scales for a growing number of applications in healthcare, sustainable energy, and chemical processing. However, the use of NP-embedded soft material in temperature-sensitive applications has been constrained by difficulties in validating the prediction of rates for energy dissipation from thermally insulating to conducting behavior. This work improved the embedment of monodisperse NPs to stably decrease the inter-NP spacings in polydimethylsiloxane (PDMS) to nano-scale distances. Lumped-parameter and finite element analyses were refined to apportion the effects of the structure and composition of the NP-embedded soft polymer on the rates for conductive, convective, and radiative heat dissipation. These advances allowed for the rational selection of PDMS size and NP composition to optimize measured rates of internal (conductive) and external (convective and radiative) heat dissipation. Stably reducing the distance between monodisperse NPs to nano-scale intervals increased the overall heat dissipation rate by up to 29%. Refined fabrication of NP-embedded polymer enabled the tunability of the dynamic thermal response (the ratio of internal to external dissipation rate) by a factor of 3.1 to achieve a value of 0.091, the largest reported to date. Heat dissipation rates simulated a priori were consistent withmore » 130 um resolution thermal images across 2- to 15-fold changes in the geometry and composition of NP-PDMS. The Nusselt number was observed to increase with the fourth root of the Rayleigh number across thermally insulative and conductive regimes, further validating the approach. These developments support the model-informed design of soft media embedded with nano-scale-spaced NPs to optimize the heat dissipation rates for evolving temperature-sensitive diagnostic and therapeutic modalities, as well as emerging uses in flexible bioelectronics, cell and tissue culture, and solar-thermal heating.Herein, we show the size and concentration of irradiated (green arrows) nanoparticles (gold dots) in soft matter (dashed lines) define the transient rate of conductive, convective, and radiative heating (red arrows).« less

Authors:
ORCiD logo [1];  [2]; ORCiD logo [3];  [2];  [2]; ORCiD logo [4];  [2]
  1. Ralph E. Martin Department of Chemical Engineering; University of Arkansas; Fayetteville; USA; Microelectronics-Photonics Graduate Program
  2. Ralph E. Martin Department of Chemical Engineering; University of Arkansas; Fayetteville; USA
  3. Ralph E. Martin Department of Chemical Engineering; University of Arkansas; Fayetteville; USA; Chemistry & Nanoscience Center
  4. Microelectronics-Photonics Graduate Program; University of Arkansas; Fayetteville; USA; Sensors & Electron Devices Directorate
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
National Science Foundation (NSF)
OSTI Identifier:
1457666
Report Number(s):
NREL/JA-5900-71827
Journal ID: ISSN 2040-3364; NANOHL
DOE Contract Number:
AC36-08GO28308
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nanoscale; Journal Volume: 10; Journal Issue: 24
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; nanoparticles; polymer films; soft matter; heat dissipation

Citation Formats

Roper, D. Keith, Berry, Keith R., Dunklin, Jeremy R., Chambers, Caitlyn, Bejugam, Vinith, Forcherio, Gregory T., and Lanier, Megan. Effects of geometry and composition of soft polymer films embedded with nanoparticles on rates for optothermal heat dissipation. United States: N. p., 2018. Web. doi:10.1039/C8NR00977E.
Roper, D. Keith, Berry, Keith R., Dunklin, Jeremy R., Chambers, Caitlyn, Bejugam, Vinith, Forcherio, Gregory T., & Lanier, Megan. Effects of geometry and composition of soft polymer films embedded with nanoparticles on rates for optothermal heat dissipation. United States. doi:10.1039/C8NR00977E.
Roper, D. Keith, Berry, Keith R., Dunklin, Jeremy R., Chambers, Caitlyn, Bejugam, Vinith, Forcherio, Gregory T., and Lanier, Megan. Mon . "Effects of geometry and composition of soft polymer films embedded with nanoparticles on rates for optothermal heat dissipation". United States. doi:10.1039/C8NR00977E.
@article{osti_1457666,
title = {Effects of geometry and composition of soft polymer films embedded with nanoparticles on rates for optothermal heat dissipation},
author = {Roper, D. Keith and Berry, Keith R. and Dunklin, Jeremy R. and Chambers, Caitlyn and Bejugam, Vinith and Forcherio, Gregory T. and Lanier, Megan},
abstractNote = {Embedding soft matter with nanoparticles (NPs) can provide electromagnetic tunability at sub-micron scales for a growing number of applications in healthcare, sustainable energy, and chemical processing. However, the use of NP-embedded soft material in temperature-sensitive applications has been constrained by difficulties in validating the prediction of rates for energy dissipation from thermally insulating to conducting behavior. This work improved the embedment of monodisperse NPs to stably decrease the inter-NP spacings in polydimethylsiloxane (PDMS) to nano-scale distances. Lumped-parameter and finite element analyses were refined to apportion the effects of the structure and composition of the NP-embedded soft polymer on the rates for conductive, convective, and radiative heat dissipation. These advances allowed for the rational selection of PDMS size and NP composition to optimize measured rates of internal (conductive) and external (convective and radiative) heat dissipation. Stably reducing the distance between monodisperse NPs to nano-scale intervals increased the overall heat dissipation rate by up to 29%. Refined fabrication of NP-embedded polymer enabled the tunability of the dynamic thermal response (the ratio of internal to external dissipation rate) by a factor of 3.1 to achieve a value of 0.091, the largest reported to date. Heat dissipation rates simulated a priori were consistent with 130 um resolution thermal images across 2- to 15-fold changes in the geometry and composition of NP-PDMS. The Nusselt number was observed to increase with the fourth root of the Rayleigh number across thermally insulative and conductive regimes, further validating the approach. These developments support the model-informed design of soft media embedded with nano-scale-spaced NPs to optimize the heat dissipation rates for evolving temperature-sensitive diagnostic and therapeutic modalities, as well as emerging uses in flexible bioelectronics, cell and tissue culture, and solar-thermal heating.Herein, we show the size and concentration of irradiated (green arrows) nanoparticles (gold dots) in soft matter (dashed lines) define the transient rate of conductive, convective, and radiative heating (red arrows).},
doi = {10.1039/C8NR00977E},
journal = {Nanoscale},
number = 24,
volume = 10,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2018},
month = {Mon Jan 01 00:00:00 EST 2018}
}