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Journal Articles

Applications and Impacts of Nanoscale Thermal Transport in Electronics Packaging

Ronald J. Warzoha, Adam A. Wilson, Brian F. Donovan, Nazli Donmezer, Ashutosh Giri, Patrick E. Hopkins, Sukwon Choi, Darshan Pahinkar, Jingjing Shi, Samuel Graham, Zhiting Tian, Laura Ruppalt
Journal: Journal of Electronic Packaging
Publisher: ASME
Article Type: Review Articles
J. Electron. Packag. June 2021, 143(2): 020804.
Paper No: EP-20-1070
https://doi.org/10.1115/1.4049293
Published Online: February 22, 2021
View Article titled, Applications and Impacts of Nanoscale Thermal Transport in Electronics Packaging
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Topics: Electronics, Gallium nitride, Heat, Nanoscale phenomena, Phonons, Temperature, Thermal conductivity, Electromagnetic scattering, Energy gap, Diamonds
Journal Articles

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

Jeffrey L. Braun, Chester J. Szwejkowski, Ashutosh Giri, Patrick E. Hopkins
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. May 2018, 140(5): 052801.
Paper No: HT-17-1363
https://doi.org/10.1115/1.4038713
Published Online: February 6, 2018
View Article titled, On the Steady-State Temperature Rise During Laser Heating of Multilayer Thin Films in Optical Pump–Probe Techniques
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Topics: Heating, Lasers, Probes, Pumps, Steady state, Temperature, Heat, Thin films, Transducers, Thermal conductivity
Journal Articles

Thermal Conductivity of Turbostratic Carbon Nanofiber Networks

Matthew L. Bauer, Christopher B. Saltonstall, Zayd C. Leseman, Thomas E. Beechem, Patrick E. Hopkins, Pamela M. Norris
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. June 2016, 138(6): 061302.
Paper No: HT-15-1272
https://doi.org/10.1115/1.4032610
Published Online: March 15, 2016
View Article titled, Thermal Conductivity of Turbostratic Carbon Nanofiber Networks
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Topics: Carbon, Carbon fibers, Fibers, Nanofibers, Pressure, Thermal conductivity, Composite materials, Density
Journal Articles

Thermal Conductivity of Self-Assembling Symmetric Block Copolymer Thin Films of Polystyrene-Block-Poly(methyl methacrylate)

Matthew C. George, Mark A. Rodriguez, Michael S. Kent, Geoff L. Brennecka, Patrick E. Hopkins
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Technical Briefs
J. Heat Mass Transfer. February 2016, 138(2): 024505.
Paper No: HT-15-1172
https://doi.org/10.1115/1.4031701
Published Online: October 21, 2015
View Article titled, Thermal Conductivity of Self-Assembling Symmetric Block Copolymer Thin Films of Polystyrene-Block-Poly(methyl methacrylate)
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Topics: Block copolymers, Chain, Polymers, Self-assembly, Thermal conductivity, Thin films, Manufacturing, Copolymers
Journal Articles

Influence of Hot Electron Scattering and Electron–Phonon Interactions on Thermal Boundary Conductance at Metal/Nonmetal Interfaces

Ashutosh Giri, Brian M. Foley, Patrick E. Hopkins
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. September 2014, 136(9): 092401.
Paper No: HT-13-1565
https://doi.org/10.1115/1.4027785
Published Online: June 12, 2014
View Article titled, Influence of Hot Electron Scattering and Electron–Phonon Interactions on Thermal Boundary Conductance at Metal/Nonmetal Interfaces
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Topics: Electrical conductance, Electrons, Metals, Nonmetallic materials, Phonons, Temperature, Probability, Electromagnetic scattering, Electron-phonon interactions, Absorption
Proceedings Papers

The Effect of Ballistic Electron Transport on Copper-Niobium Thermal Interface Conductance

Ramez Cheaito, John C. Duda, Thomas E. Beechem, Jon F. Ihlefeld, Khalid Hattar, Edward S. Piekos, Amit Misra, Jon K. Baldwin, Patrick E. Hopkins
Proc. ASME. HT2013, Volume 1: Heat Transfer in Energy Systems; Thermophysical Properties; Theory and Fundamental Research in Heat Transfer, V001T03A009, July 14–19, 2013
Publisher: American Society of Mechanical Engineers
Paper No: HT2013-17541
https://doi.org/10.1115/HT2013-17541
View Paper titled, The Effect of Ballistic Electron Transport on Copper-Niobium Thermal Interface Conductance
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Topics: Copper, Electrical conductance, Electron transport, Electromagnetic scattering, Electrons, Metals, Thermal conductivity, Resistors, Temperature, Thermoreflectance
Journal Articles

Mean Free Path Effects on the Experimentally Measured Thermal Conductivity of Single-Crystal Silicon Microbridges

Timothy S. English, Leslie M. Phinney, Patrick E. Hopkins, Justin R. Serrano
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Research-Article
J. Heat Mass Transfer. September 2013, 135(9): 091103.
Paper No: HT-12-1408
https://doi.org/10.1115/1.4024357
Published Online: July 26, 2013
View Article titled, Mean Free Path Effects on the Experimentally Measured Thermal Conductivity of Single-Crystal Silicon Microbridges
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Topics: Silicon, Temperature, Thermal conductivity, Crystals, Mean free path, Phonons
Proceedings Papers

Anharmonic Phonon Dispersion Relations, Group Velocities, and Branch-Dependent Specific Heat Capacities Measured Directly From Molecular Dynamics Simulations at Finite Temperatures

Timothy S. English, Thomas W. Kenny, Justin L. Smoyer, Christopher H. Baker, Nam Q. Le, John C. Duda, Pamela M. Norris, Patrick E. Hopkins
Proc. ASME. HT2012, Volume 1: Heat Transfer in Energy Systems; Theory and Fundamental Research; Aerospace Heat Transfer; Gas Turbine Heat Transfer; Transport Phenomena in Materials Processing and Manufacturing; Heat and Mass Transfer in Biotechnology; Environmental Heat Transfer; Visualization of Heat Transfer; Education and Future Directions in Heat Transfer, 617-624, July 8–12, 2012
Publisher: American Society of Mechanical Engineers
Paper No: HT2012-58459
https://doi.org/10.1115/HT2012-58459
View Paper titled, Anharmonic Phonon Dispersion Relations, Group Velocities, and Branch-Dependent Specific Heat Capacities Measured Directly From Molecular Dynamics Simulations at Finite Temperatures
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Topics: Dispersion relations, Molecular dynamics simulation, Phonons, Specific heat, Temperature, Graphene, Pressure, Simulation, Thermal conductivity
Proceedings Papers

Thermal Conductivity of Single-Crystal Silicon Microbridges Measured by Electrical Resistance Thermometry and Time-Domain Thermoreflectance

Timothy S. English, Leslie M. Phinney, Patrick E. Hopkins, Justin R. Serrano
Proc. ASME. MNHMT2012, ASME 2012 Third International Conference on Micro/Nanoscale Heat and Mass Transfer, 713-722, March 3–6, 2012
Publisher: American Society of Mechanical Engineers
Paper No: MNHMT2012-75179
https://doi.org/10.1115/MNHMT2012-75179
View Paper titled, Thermal Conductivity of Single-Crystal Silicon Microbridges Measured by Electrical Resistance Thermometry and Time-Domain Thermoreflectance
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Topics: Crystals, Electrical resistance, Silicon, Temperature measurement, Thermal conductivity, Thermoreflectance, Temperature, Microelectromechanical systems, Modeling, Silicon-on-insulator
Journal Articles

Prediction and Measurement of Thermal Transport Across Interfaces Between Isotropic Solids and Graphitic Materials

Pamela M. Norris, Justin L. Smoyer, John C. Duda, Patrick E. Hopkins
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Heat Transfer In Nanochannels, Microchannels, And Minichannels
J. Heat Mass Transfer. February 2012, 134(2): 020910.
https://doi.org/10.1115/1.4004932
Published Online: December 22, 2011
View Article titled, Prediction and Measurement of Thermal Transport Across Interfaces Between Isotropic Solids and Graphitic Materials
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Topics: Electrical conductance, Graphene, Graphite, Phonons, Thermal conductivity, Thermoreflectance, Temperature, Carbon nanotubes, Solids, Thin films
Journal Articles

On the Linear Temperature Dependence of Phonon Thermal Boundary Conductance in the Classical Limit

John C. Duda, Pamela M. Norris, Patrick E. Hopkins
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Technical Briefs
J. Heat Mass Transfer. July 2011, 133(7): 074501.
https://doi.org/10.1115/1.4003575
Published Online: April 4, 2011
View Article titled, On the Linear Temperature Dependence of Phonon Thermal Boundary Conductance in the Classical Limit
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Topics: Electrical conductance, Phonons, Temperature effects, Electromagnetic scattering, Molecular dynamics
Journal Articles

Measuring the Thermal Conductivity of Porous, Transparent SiO 2 Films With Time Domain Thermoreflectance

Patrick E. Hopkins, Bryan Kaehr, Leslie M. Phinney, Timothy P. Koehler, Anne M. Grillet, Darren Dunphy, Fred Garcia, C. Jeffrey Brinker
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. June 2011, 133(6): 061601.
https://doi.org/10.1115/1.4003548
Published Online: March 9, 2011
View Article titled, Measuring the Thermal Conductivity of Porous, Transparent SiO 2 Films With Time Domain Thermoreflectance
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Topics: Glass, Heat transfer, Thermal conductivity, Thermoreflectance, Heat, Geometry, Transparency, Thin films, Temperature
Journal Articles

Anharmonic Phonon Interactions at Interfaces and Contributions to Thermal Boundary Conductance

Patrick E. Hopkins, John C. Duda, Pamela M. Norris
Journal: ASME Journal of Heat and Mass Transfer
Publisher: ASME
Article Type: Research Papers
J. Heat Mass Transfer. June 2011, 133(6): 062401.
https://doi.org/10.1115/1.4003549
Published Online: March 9, 2011
View Article titled, Anharmonic Phonon Interactions at Interfaces and Contributions to Thermal Boundary Conductance
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Topics: Electrical conductance, Electromagnetic scattering, Phonons, Diamonds, Temperature, Radiation scattering, Scattering (Physics)
Proceedings Papers

Effects of Surface Roughness and Oxide Layer on the Thermal Boundary Conductance at Aluminum/Silicon Interfaces

Patrick E. Hopkins, Leslie M. Phinney, Justin R. Serrano, Thomas E. Beechem
Proc. ASME. IHTC14, 2010 14th International Heat Transfer Conference, Volume 6, 313-319, August 8–13, 2010
Publisher: American Society of Mechanical Engineers
Paper No: IHTC14-22268
https://doi.org/10.1115/IHTC14-22268
View Paper titled, Effects of Surface Roughness and Oxide Layer on the Thermal Boundary Conductance at Aluminum/Silicon Interfaces
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Topics: Aluminum, Electrical conductance, Silicon, Surface roughness, Electromagnetic scattering, Radiation scattering, Scattering (Physics), Atomic force microscopy, Interfacial thermal resistance, Mean free path
Proceedings Papers

Optical Measurements of the Thermal Conductivity of Porous SiO 2 Films

Patrick E. Hopkins, Bryan J. Kaehr, Leslie M. Phinney, Timothy P. Koehler, Anne M. Grillet, Darren Dunphy, Fred Garcia, C. Jeffrey Brinker
Proc. ASME. IHTC14, 2010 14th International Heat Transfer Conference, Volume 6, 361-369, August 8–13, 2010
Publisher: American Society of Mechanical Engineers
Paper No: IHTC14-22488
https://doi.org/10.1115/IHTC14-22488
View Paper titled, Optical Measurements of the Thermal Conductivity of Porous SiO 2 Films
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Topics: Optical measurement, Thermal conductivity, Algorithms, Geometry, Composite materials, Heat, Heat transfer, Nanocomposites, Nanomaterials, Probes
Proceedings Papers

Prediction and Measurement of Thermal Transport Across Interfaces Between Isotropic Solids and Graphitic Materials

Pamela M. Norris, Justin L. Smoyer, John C. Duda, Patrick E. Hopkins
Proc. ASME. ICNMM2010, ASME 2010 8th International Conference on Nanochannels, Microchannels, and Minichannels: Parts A and B, 223-232, August 1–5, 2010
Publisher: American Society of Mechanical Engineers
Paper No: FEDSM-ICNMM2010-30171
https://doi.org/10.1115/FEDSM-ICNMM2010-30171
View Paper titled, Prediction and Measurement of Thermal Transport Across Interfaces Between Isotropic Solids and Graphitic Materials
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Topics: Carbon, Carbon nanotubes, Composite materials, Electrical conductance, Graphene, Graphite, Mechanical properties, Metals, Nanostructures , Solids
Proceedings Papers

Tunable Thermal Conductivity of TiO 2 Films of Close-Packed Nanoparticles

Patrick E. Hopkins, Manish Mittal, Leslie M. Phinney, Anne M. Grillet, Eric M. Furst
Proc. ASME. AJTEC2011, ASME/JSME 2011 8th Thermal Engineering Joint Conference, T30047, March 13–17, 2011
Publisher: American Society of Mechanical Engineers
Paper No: AJTEC2011-44136
https://doi.org/10.1115/AJTEC2011-44136
View Paper titled, Tunable Thermal Conductivity of TiO 2 Films of Close-Packed Nanoparticles
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Topics: Nanoparticles, Thermal conductivity, Aluminum, Anisotropy, Coating processes, Coatings, Flow (Dynamics), Glass, Particulate matter, Thermoreflectance
Proceedings Papers

Assesment of Vibrational Coupling at Solid-SAM Junctions

Christopher B. Saltonstall, John C. Duda, Patrick E. Hopkins, Pamela M. Norris
Proc. ASME. AJTEC2011, ASME/JSME 2011 8th Thermal Engineering Joint Conference, T30051, March 13–17, 2011
Publisher: American Society of Mechanical Engineers
Paper No: AJTEC2011-44314
https://doi.org/10.1115/AJTEC2011-44314
View Paper titled, Assesment of Vibrational Coupling at Solid-SAM Junctions
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Topics: Junctions, Chain, Chemical properties, Electrical conductance, Electromagnetic scattering, Radiation scattering, Scattering (Physics), Self-assembly, Thermal conductivity, Thermal properties
Proceedings Papers

Contributions of Anharmonic Phonon Interactions to Thermal Boundary Conductance

Patrick E. Hopkins, John C. Duda, Pamela M. Norris
Proc. ASME. AJTEC2011, ASME/JSME 2011 8th Thermal Engineering Joint Conference, T30007, March 13–17, 2011
Publisher: American Society of Mechanical Engineers
Paper No: AJTEC2011-44135
https://doi.org/10.1115/AJTEC2011-44135
View Paper titled, Contributions of Anharmonic Phonon Interactions to Thermal Boundary Conductance
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Topics: Electrical conductance, Phonons, Electromagnetic scattering, Radiation scattering, Scattering (Physics), Diamonds, Density, Dimensions, Temperature
Proceedings Papers

Estimating Density Reduction and Phonon Localization From Optical Thermal Conductivity Measurements of Porous Silica and Aerogel Thin Films

Patrick E. Hopkins, Bryan J. Kaehr, Darren Dunphy, C. Jeffrey Brinker
Proc. ASME. AJTEC2011, ASME/JSME 2011 8th Thermal Engineering Joint Conference, T30008, March 13–17, 2011
Publisher: American Society of Mechanical Engineers
Paper No: AJTEC2011-44137
https://doi.org/10.1115/AJTEC2011-44137
View Paper titled, Estimating Density Reduction and Phonon Localization From Optical Thermal Conductivity Measurements of Porous Silica and Aerogel Thin Films
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Topics: Density, Phonons, Thermal conductivity, Thin films, Glass, Thermoreflectance, Heat capacity, Nitrogen, Probes, Sorption