Search Results - "Braun, Jeffrey"

High-entropy fluorite oxides by Gild, Joshua, Samiee, Mojtaba, Braun, Jeffrey L., Harrington, Tyler, Vega, Heidy, Hopkins, Patrick E., Vecchio, Kenneth, Luo, Jian

“…Eleven fluorite oxides with five principal cations (in addition to a four-principal-cation (Hf0.25Zr0.25Ce0.25Y0.25)O2-δ as a start point and baseline) were…”
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Charge‐Induced Disorder Controls the Thermal Conductivity of Entropy‐Stabilized Oxides by Braun, Jeffrey L., Rost, Christina M., Lim, Mina, Giri, Ashutosh, Olson, David H., Kotsonis, George N., Stan, Gheorghe, Brenner, Donald W., Maria, Jon‐Paul, Hopkins, Patrick E.

“…Manipulating a crystalline material's configurational entropy through the introduction of unique atomic species can produce novel materials with desirable…”
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A high-entropy silicide: (Mo0.2Nb0.2Ta0.2Ti0.2W0.2)Si2 by Joshua Gild, Jeffrey Braun, Kevin Kaufmann, Eduardo Marin, Tyler Harrington, Patrick Hopkins, Kenneth Vecchio, Jian Luo

“…A high-entropy metal disilicide, (Mo0.2Nb0.2Ta0.2Ti0.2W0.2)Si2, has been successfully synthesized. X-ray diffraction (XRD), energy dispersive X-ray…”
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Implications of Interfacial Bond Strength on the Spectral Contributions to Thermal Boundary Conductance across Solid, Liquid, and Gas Interfaces: A Molecular Dynamics Study by Giri, Ashutosh, Braun, Jeffrey L, Hopkins, Patrick E

“…The modal contributions to interfacial heat flow across Lennard-Jones based solid/solid, solid/liquid, and solid/gas interfaces are predicted via molecular…”
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High In-Plane Thermal Conductivity of Aluminum Nitride Thin Films by Hoque, Md Shafkat Bin, Koh, Yee Rui, Braun, Jeffrey L, Mamun, Abdullah, Liu, Zeyu, Huynh, Kenny, Liao, Michael E, Hussain, Kamal, Cheng, Zhe, Hoglund, Eric R, Olson, David H, Tomko, John A, Aryana, Kiumars, Galib, Roisul, Gaskins, John T, Elahi, Mirza Mohammad Mahbube, Leseman, Zayd C, Howe, James M, Luo, Tengfei, Graham, Samuel, Goorsky, Mark S, Khan, Asif, Hopkins, Patrick E

“…High thermal conductivity materials show promise for thermal mitigation and heat removal in devices. However, shrinking the length scales of these materials…”
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Orders of magnitude reduction in the thermal conductivity of polycrystalline diamond through carbon, nitrogen, and oxygen ion implantation by Scott, Ethan A., Hattar, Khalid, Braun, Jeffrey L., Rost, Christina M., Gaskins, John T., Bai, Tingyu, Wang, Yekan, Ganski, Claire, Goorsky, Mark, Hopkins, Patrick E.

“…Despite the exceptional thermal and mechanical functionalities of diamond, its superlative properties are highly subject to the presence of point defects,…”
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Interfacial Defect Vibrations Enhance Thermal Transport in Amorphous Multilayers with Ultrahigh Thermal Boundary Conductance by Giri, Ashutosh, King, Sean W., Lanford, William A., Mei, Antonio B., Merrill, Devin, Li, Liyi, Oviedo, Ron, Richards, John, Olson, David H., Braun, Jeffrey L., Gaskins, John T., Deangelis, Freddy, Henry, Asegun, Hopkins, Patrick E.

“…The role of interfacial nonidealities and disorder on thermal transport across interfaces is traditionally assumed to add resistance to heat transfer,…”
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Observation of solid-state bidirectional thermal conductivity switching in antiferroelectric lead zirconate (PbZrO3) by Aryana, Kiumars, Tomko, John A., Gao, Ran, Hoglund, Eric R., Mimura, Takanori, Makarem, Sara, Salanova, Alejandro, Hoque, Md Shafkat Bin, Pfeifer, Thomas W., Olson, David H., Braun, Jeffrey L., Nag, Joyeeta, Read, John C., Howe, James M., Opila, Elizabeth J., Martin, Lane W., Ihlefeld, Jon F., Hopkins, Patrick E.

“…Materials with tunable thermal properties enable on-demand control of temperature and heat flow, which is an integral component in the development of…”
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Bulk-like Intrinsic Phonon Thermal Conductivity of Micrometer-Thick AlN Films by Koh, Yee Rui, Cheng, Zhe, Mamun, Abdullah, Bin Hoque, Md Shafkat, Liu, Zeyu, Bai, Tingyu, Hussain, Kamal, Liao, Michael E, Li, Ruiyang, Gaskins, John T, Giri, Ashutosh, Tomko, John, Braun, Jeffrey L, Gaevski, Mikhail, Lee, Eungkyu, Yates, Luke, Goorsky, Mark S, Luo, Tengfei, Khan, Asif, Graham, Samuel, Hopkins, Patrick E

“…Aluminum nitride (AlN) has garnered much attention due to its intrinsically high thermal conductivity. However, engineering thin films of AlN with these high…”
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Validation of the Wiedemann-Franz Law in Solid and Molten Tungsten above 2000 K through Thermal Conductivity Measurements via Steady-State Temperature Differential Radiometry by Milich, Milena, Schonfeld, Hunter B, Boboridis, Konstantinos, Robba, Davide, Vlahovic, Luka, Konings, Rudy J M, Braun, Jeffrey L, Gaskins, John T, Bhatt, Niraj, Giri, Ashutosh, Hopkins, Patrick E

“…We measure the thermal conductivity of solid and molten tungsten using steady state temperature differential radiometry. We demonstrate that the thermal…”
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Experimental Evidence of Suppression of Subterahertz Phonons and Thermal Conductivity in GaAs/AlAs Superlattices Due to Extrinsic Scattering Processes by Giri, Ashutosh, Braun, Jeffrey L, Shima, Darryl M, Addamane, Sadhvikas, Balakrishnan, Ganesh, Hopkins, Patrick E

“…We report on the lifetimes of zone-center longitudinal phonon modes in GaAs/AlAs superlattices with varying period thicknesses. By measuring the lifetimes at…”
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Ballistic transport of long wavelength phonons and thermal conductivity accumulation in nanograined silicon-germanium alloys by Chen, Long, Braun, Jeffrey L., Donovan, Brian F., Hopkins, Patrick E., Poon, S. Joseph

“…Computationally efficient modeling of the thermal conductivity of materials is crucial to thorough experimental planning and theoretical understanding of…”
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Dual-phase high-entropy ultra-high temperature ceramics by Qin, Mingde, Gild, Joshua, Hu, Chongze, Wang, Haoren, Hoque, Md Shafkat Bin, Braun, Jeffrey L., Harrington, Tyler J., Hopkins, Patrick E., Vecchio, Kenneth S., Luo, Jian

“…•High-entropy boride-carbide two-phase ultrahigh temperature ceramics are made.•This work further extends the emerging field of high-entropy ceramics.•A novel…”
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Breaking network connectivity leads to ultralow thermal conductivities in fully dense amorphous solids by Braun, Jeffrey L., King, Sean W., Giri, Ashutosh, Gaskins, John T., Sato, Masanori, Fujiseki, Takemasa, Fujiwara, Hiroyuki, Hopkins, Patrick E.

“…We demonstrate a method to reduce the thermal conductivity of fully dense (above the rigidity percolation threshold) amorphous thin films below the minimum…”
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Reducing the thermal conductivity of chemically ordered binary alloys below the alloy limit via the alteration of phonon dispersion relations by Giri, Ashutosh, Braun, Jeffrey L., Tomko, John A., Hopkins, Patrick E.

“…We investigate the effect of crystalline configuration on the thermal conductivity of binary Lennard-Jones based solid solutions via classical molecular…”
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Thermal conductivity and hardness of three single-phase high-entropy metal diborides fabricated by borocarbothermal reduction and spark plasma sintering by Gild, Joshua, Wright, Andrew, Quiambao-Tomko, Kathleen, Qin, Mingde, Tomko, John A., Shafkat bin Hoque, Md, Braun, Jeffrey L., Bloomfield, Blake, Martinez, Daniel, Harrington, Tyler, Vecchio, Kenneth, Hopkins, Patrick E., Luo, Jian

“…Four high-entropy metal diborides have been synthesized and densified by borocarbothermal reduction of metal oxides with boron carbide and graphite and…”
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Substrate thermal conductivity controls the ability to manufacture microstructures via laser-induced direct write by Tomko, John A., Olson, David H., Braun, Jeffrey L., Kelliher, Andrew P., Kaehr, Bryan, Hopkins, Patrick E.

“…In controlling the thermal properties of the surrounding environment, we provide insight into the underlying mechanisms driving the widely used laser direct…”
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Size Effects on the Cross-Plane Thermal Conductivity of Transparent Conducting Indium Tin Oxide and Fluorine Tin Oxide Thin Films by Olson, David H., Rost, Christina M., Gaskins, John T., Szwejkowski, Chester J., Braun, Jeffrey L., Hopkins, Patrick E.

“…Visibly transparent and electrically conductive oxides are attractive for a wide array of applications. Indium tin oxide (ITO) and fluorine tin oxide (FTO) are…”
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Crystalline coherence length effects on the thermal conductivity of MgO thin films by Meyer, Kelsey E., Cheaito, Ramez, Paisley, Elizabeth, Shelton, Christopher T., Braun, Jeffrey L., Maria, Jon-Paul, Ihlefeld, Jon F., Hopkins, Patrick E.

“…Phonon scattering in crystalline systems can be strongly dictated by a wide array of defects, many of which can be difficult to observe via standard microscopy…”
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Hot Electron Thermoreflectance Coefficient of Gold during Electron–Phonon Nonequilibrium by Radue, Elizabeth L, Tomko, John A, Giri, Ashutosh, Braun, Jeffrey L, Zhou, Xin, Prezhdo, Oleg V, Runnerstrom, Evan L, Maria, Jon-Paul, Hopkins, Patrick E

“…The temperature-dependent reflectivity of metals is quantified by the thermoreflectance coefficient, which is a material-dependent parameter that depends on…”
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