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Macroscopic assemblies of carbon nanotubes (CNTs) are desirable materials because of the excellent CNT properties. Amongst the methods of production of these CNT materials, the dry-draw fabrication where CNT fibers (CNTFs) are directly…

Mesoscale and Nanoscale Physics · Physics 2023-07-12 Luís F. V. Thomazini , Alexandre F. Fonseca

Quantum dots are useful model systems for studying quantum thermoelectric behavior because of their highly energy-dependent electron transport properties, which are tunable by electrostatic gating. As a result of this strong energy…

Mesoscale and Nanoscale Physics · Physics 2016-06-17 Artis Svilans , Adam M. Burke , Sofia Fahlvik Svensson , Martin Leijnse , Heiner Linke

We investigate the thermal conductivity of four types of deformed carbon nanotubes by using the nonequilibrium molecular dynamics method. It is reported that various deformations have different influence on the thermal properties of carbon…

Mesoscale and Nanoscale Physics · Physics 2015-05-30 Wei-Rong Zhong , Mao-Ping Zhang , Dong-Qin Zheng , Bao-Quan Ai

In the present work, the morphology and the electrical and thermal conduction properties of co-continuous poly(vinylidene fluoride) (PVDF), maleated polypropylene (PPgMA) and multiwall carbon nanotubes (CNT) nanostructured blends are…

Applied Physics · Physics 2019-10-31 Samuele Colonna , Zhidong Han , Alberto Fina

Samples of heavy fermion compound CeCu6 were prepared by hot-press technique. Temperature-dependent (5-300 K) thermoelectric transport properties of the samples were measured. The dimensionless figure-of-merit (ZT) was optimized by varying…

Materials Science · Physics 2013-12-16 Mani Pokharel , Tulashi Dahal , Zhifeng Ren , Cyril Opeil

We report on the existence of temperature induced negative differential conductivity (NDC) for electrons in gaseous nitrogen. The important role of superelastic rotational collisional processes in this phenomenon is highlighted. A model…

Chemical Physics · Physics 2019-04-16 M J E Casey , D G Cocks , G J Boyle , M J Brunger , S Dujko , J de Urquijo , R D White

Active thermal control is crucial in achieving the required accuracy and throughput in many industrial applications, e.g., in the medical industry, high-power lighting industry, and semiconductor industry. Thermoelectric Modules (TEMs) can…

Systems and Control · Electrical Eng. & Systems 2020-06-19 Enzo Evers , Rens Slenders , Rob van Gils , Tom Oomen

The differential effective medium method (DEM) is presented from a physical viewpoint and employed to calculate the lattice thermal conductivity of nano-bulk composites comprising core-shell particles. Extended from the average-T-matrix…

Materials Science · Physics 2013-08-09 S. J. Poon , A. S. Petersen , Di Wu

In the past decade, semiconducting carbon nanotube thin films have been recognized as contending materials for wide-ranging applications in electronics, energy, and sensing. In particular, improvements in large-area flexible electronics…

This work builds on the previous introduction [1] of a coupled experimental-computational system devised to fully characterize the thermal behavior of complex 3D submicron electronic devices. The new system replaces the laser-based surface…

Materials Science · Physics 2007-09-13 Peter E. Raad , Pavel L. Komarov , M. Burzo

In this paper the heat transport in carbon nanotubes is investigated. When the dimension of the structure is of the order of the de Broglie wave length the transport phenomena must be analyzed within quantum mechanics. In this paper we…

Other Condensed Matter · Physics 2016-08-31 J. Marciak-Kozlowska , M. Kozlowski

With decreasing device dimensions, the performance of carbon nanotube field-effect transistors (CNFETs) is limited by high Off currents except at low drain voltages. We show that an asymmetric design improves the performance, reducing Off…

Condensed Matter · Physics 2009-11-10 S. Heinze , J. Tersoff , Ph. Avouris

We present a comprehensive investigation of self-heating in gallium nitride (GaN) high-electron-mobility transistors (HEMTs) through technology computer-aided design (TCAD) simulations and phonon Monte Carlo (MC) simulations. With…

Applied Physics · Physics 2024-01-25 Yang Shen , Bing-Yang Cao

A model for the cooling properties of a nanocantilever by a free electron beam is presented for a capacitive interaction. The optimal parameters for position sensing and cooling applications are estimated from previous experimental…

Mesoscale and Nanoscale Physics · Physics 2018-08-22 A. Descombin , S. Perisanu , P. Poncharal , P. Vincent , S. Purcell , A. Ayari

We investigate the piezoresistive effect of carbon nanotubes (CNTs) within density functional theory (DFT) aiming at application-relevant CNTs. CNTs are excellent candidates for the usage in nano-electromechanical sensors (NEMS) due to…

Mesoscale and Nanoscale Physics · Physics 2017-06-30 C. Wagner , J. Schuster , T. Gessner

Field-effect phototransistors were fabricated based on individual carbon nanotubes (CNTs) sensitized by CH$_3$NH$_3$PbI$_3$ nanowires (MAPbI$_3$NW). These devices represent light responsivities of R=7.7x10$^5$ A/W at low-lighting conditions…

Mesoscale and Nanoscale Physics · Physics 2016-12-07 M. Spina , B. Náfrádi , H. M. Tóháti , K. Kamarás , R. Gaal , L. Forró , E. Horváth

A continuous model of double-walled carbon nanotube (DWCNT) low-frequency dynamics was constructed. In the frame of the approach proposed formation of a DWCNT low-frequency phonon spectrum from the ones of corresponding single-walled carbon…

Mesoscale and Nanoscale Physics · Physics 2016-06-22 M. V. Avramenko , S. B. Rochal

The temperature dependence of thermodynamic and mechanical properties of six fcc transition metals (Ni, Cu, Ag, Au, Pt, Rh) and the alloying behavior of Ag-Au and Cu-Ni are studied using molecular dynamics (MD). The structures are described…

Materials Science · Physics 2008-02-03 T. Cagin , G. Dereli , M. Uludogan , M. Tomak

We report here on electrical measurements on individual multi-walled carbon nanotubes (MWNTs) that show that the presence or movement of impurities or defects in the carbon nanotube can radically change its low temperature transport…

Mesoscale and Nanoscale Physics · Physics 2007-05-23 Zhengfan Zhang , Venkat Chandrasekhar , Dmitriy A. Dikin , Rodney S. Ruoff

Tensile tests at room temperature are performed using molecular dynamics on all configurations of single-walled carbon nanotubes up to 4 nm in diameter. Distributions of the Young's modulus, Poisson's ratio, ultimate tensile strength and…

Applied Physics · Physics 2021-09-08 Marko Canadija