Enhancing solid-liquid interface thermal transport using self-assembled monolayers

Tian, Zhiting; Marconnet, Amy; Chen, Gang

doi:10.1063/1.4921758

Cited by 70 publications

(47 citation statements)

References 28 publications

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“…[38][39][40][41][42][43][44][45] Additionally, there have been a number of studies assessing the effects of molecular interfaces on solid-liquid thermal boundary conductance and vibrational energy transport using a variety of SAM layers. [46][47][48][49] Recent works using phosphonic acid (PA) molecules have demonstrated the ability of 12-mercaptododecyl phosphonic acid (MDPA) to strengthen the bond between Au and TiO 2 , leading to an increase in h K . 24,26 This result focusing on PA molecules suggests a new class of molecular interfaces may be used to atomistically manipulate interfacial transport.…”

Section: Introductionmentioning

confidence: 99%

Thermal Conductance across Phosphonic Acid Molecules and Interfaces: Ballistic versus Diffusive Vibrational Transport in Molecular Monolayers

Gaskins

Bulusu²,

Giordano³

et al. 2015

J. Phys. Chem. C

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The influence of planar organic linkers on thermal boundary conductance across hybrid interfaces has focused on the organic/inorganic interaction energy, rather than on vibrational mechanisms in the molecule. As a result, research into interfacial transport at planar organic monolayer junctions has treated molecular systems as thermally ballistic. We show that thermal conductance in phosphonic acid (PA) molecules is ballistic, and the thermal boundary conductance across metal/PA/sapphire interfaces is driven by the same phononic processes as those across metal/sapphire interfaces without PAs, with one exception. We find a more than 40% reduction in conductance across Henicosafluorododecyl phosphonic acid (F21PA) interfaces, independent of metal contact, despite similarities in structure, composition and terminal group to the variety of other PAs studied. Our results suggest diffusive scattering of thermal vibrations in F21PA, demonstrating a clear path toward modification of interfacial thermal transport based on knowledge of ballistic and diffusive scattering in single monolayer molecular interfacial films.

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Section: Introductionmentioning

confidence: 99%

Thermal Conductance across Phosphonic Acid Molecules and Interfaces: Ballistic versus Diffusive Vibrational Transport in Molecular Monolayers

Gaskins

Bulusu²,

Giordano³

et al. 2015

J. Phys. Chem. C

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“…The transfer of vibrational energy between liquids and solids is, however, poorly understood compared to solid-solid interfaces, in part due to the difficulty of experimentally isolating the thermal resistance of the interface [7,8]. Existing experiments have, however, indicated [8][9][10][11][12] that the interfacial conductance of a typical solid-liquid surface is generally close to the conductance of a typical solid-solid interface.…”

Section: Introductionmentioning

confidence: 99%

Spectral mapping of heat transfer mechanisms at liquid-solid interfaces

et al. 2016

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Thermal transport through liquid-solid interfaces plays an important role in many chemical and biological processes, and better understanding of liquid-solid energy transfer is expected to enable improving the efficiency of thermally driven applications. We determine the spectral distribution of thermal current at liquid-solid interfaces from nonequilibrium molecular dynamics, delivering a detailed picture of the contributions of different vibrational modes to liquid-solid energy transfer. Our results show that surface modes located at the Brillouin zone edge and polarized along the liquidsolid surface normal play a crucial role in liquid-solid energy transfer. Strong liquid-solid adhesion allows also for the coupling of in-plane polarized modes in the solid with the liquid, enhancing the heat transfer rate and enabling efficient energy transfer up to the cut-off frequency of the solid. Our results provide fundamental understanding of the energy transfer mechanisms in liquid-solid systems and enable detailed investigations of energy transfer between, e.g., water and organic molecules.

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“…Such a geometry consists of a sample of interest in contact with a metal transducer, but adjacent to the metal surface (plane of laser absorption) is a transparent substrate through which the pump and probe beams traverse. These geometries are commonly used in TDTR and FDTR to study thermal properties of porous materials and liquids and to understand energy transport across solid/liquid interfaces [7,[33][34][35][36][37].…”

Section: Heat Dissipation Methods and Bidirectional Heat Flow Geometriesmentioning

confidence: 99%

On the Steady-State Temperature Rise During Laser Heating of Multilayer Thin Films in Optical Pump–Probe Techniques

Braun

Szwejkowski

Giri

et al. 2018

Journal of Heat Transfer

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In this study, we calculate the steady-state temperature rise that results from laser heating of multilayer thin films using the heat diffusion equation. For time- and frequency-domain thermoreflectance (TDTR and FDTR) that rely on modulated laser sources, we decouple the modulated and steady-state temperature profiles to understand the conditions needed to achieve a single temperature approximation throughout the experimental volume, allowing for the estimation of spatially invariant thermal parameters within this volume. We consider low thermal conductivity materials, including amorphous silicon dioxide (a-SiO2), polymers, and disordered C60, to demonstrate that often-used analytical expressions fail to capture this temperature rise under realistic experimental conditions, such as when a thin-film metal transducer is used or when pump and probe spot sizes are significantly different. To validate these findings and demonstrate a practical approach to simultaneously calculate the steady-state temperature and extract thermal parameters in TDTR, we present an iterative algorithm for obtaining the steady-state temperature rise and measure the thermal conductivity and thermal boundary conductance of a-SiO2 with a 65-nm gold thin film transducer. Furthermore, we discuss methods of heat dissipation to include the use of conductive substrates as well as the use of bidirectional heat flow geometries. Finally, we quantify the influence of the optical penetration depth (OPD) on the steady-state temperature rise to reveal that only when the OPD approaches the characteristic length of the temperature decay does it alter the temperature profile relative to the surface heating condition.

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Enhancing solid-liquid interface thermal transport using self-assembled monolayers

Cited by 70 publications

References 28 publications

Thermal Conductance across Phosphonic Acid Molecules and Interfaces: Ballistic versus Diffusive Vibrational Transport in Molecular Monolayers

Thermal Conductance across Phosphonic Acid Molecules and Interfaces: Ballistic versus Diffusive Vibrational Transport in Molecular Monolayers

Spectral mapping of heat transfer mechanisms at liquid-solid interfaces

On the Steady-State Temperature Rise During Laser Heating of Multilayer Thin Films in Optical Pump–Probe Techniques

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