Strain engineering of thermal conductivity in graphene sheets and nanoribbons: a demonstration of magic flexibility

2011 ◽  
Vol 22 (10) ◽  
pp. 105705 ◽  
Author(s):  
Ning Wei ◽  
Lanqing Xu ◽  
Hui-Qiong Wang ◽  
Jin-Cheng Zheng
Keyword(s):  
Thermal Conductivity ◽  
Strain Engineering ◽  
Graphene Sheets

Strain Engineering of Thermal Conductivity of Two-Dimensional MoS2 and h-BN

MRS Advances ◽  
2016 ◽  
Vol 1 (32) ◽  
pp. 2297-2302 ◽  
Author(s):  
Xiaonan Wang ◽  
Alireza Tabarraei
Keyword(s):  
Thermal Conductivity ◽  
Tensile Strain ◽  
Phonon Dispersion ◽  
Hexagonal Boron Nitride ◽  
Three Dimensional ◽  
Strain Engineering ◽  
Normal Strain ◽  
Dynamics Modeling ◽  
Molecular Dynamics Modeling ◽  
The Impact

ABSTRACTWe have used reverse nonequlibrium molecular dynamics modeling to study the impact of uniaxial stretching on the thermal conductivity of monolayer molybdenum disulfide (MoS2) and hexagonal boron nitride (h-BN). Our results predict an anomalous response of the thermal conductivity of these materials to normal strain. Thermal conductivity of h-BN increases under a tensile strain whereas thermal conductivity of MoS2 remains fairly constant. These are in striking contrast to the impact of tensile strain on the thermal conductivity of three dimensional materials whose thermal conductivity decreases under tensile strain. We investigate the mechanism responsible for this unexpected behavior by studying the impact of tensile strain on the phonon dispersion curves and group velocities of these materials.

Enhanced thermal conductivity for polyimide composites with a three-dimensional silicon carbide nanowire@graphene sheets filler

2015 ◽  
Vol 3 (9) ◽  
pp. 4884-4891 ◽  
Author(s):  
Wen Dai ◽  
Jinhong Yu ◽  
Yi Wang ◽  
Yingze Song ◽  
Fakhr E. Alam ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Silicon Carbide ◽  
Three Dimensional ◽  
Graphene Sheets ◽  
Polyimide Composites ◽  
Polyimide Matrix ◽  
Enhanced Thermal Conductivity

3DSG incorporated into a polyimide matrix greatly enhanced its thermal conductivity (up to 2.63 W m−1 K−1), approximately a 10-fold enhancement in comparison with that of neat polyimide.

Preparation and Characterization of In Situ Nanocomposites of Graphene Nanosheets/Polyurethane

2019 ◽  
Vol 814 ◽  
pp. 90-95 ◽  
Author(s):  
Guang Lei Lv ◽  
Yuan Yuan Li ◽  
Chen Fei ◽  
Zhi Hao Shan ◽  
Jing Gan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Tensile Strength ◽  
Graphene Nanosheets ◽  
Graphene Sheets ◽  
Microstructural Properties ◽  
Wear Performance ◽  
Polyurethane Composites

Graphene nanosheets/polyurethane (GNS/PU) was prepared in situ by polymerization technique for the manufacture of PU safety shoes soles. The graphene nanosheets/polyurethane composites were characterized for their mechanical properties, thermal conductivity and abrasion resistance, and comparison is made with those of the neat polyurethane. The microstructural properties of GNS/PU were characterized by SEM. The results show that with the increase of the amount of graphene within the range of weight-percentages analyzed, the tensile strength of the composites gradually increases. The tensile strength of the GNS/PU composites increased to 64.14 MPa with 2 wt% GNS, compared with 55.1 MPa for neat PU. When the graphene sheets reached 2 wt%, the abrasion volume reached 71 mm3. Compared with the pure PU, the wear performance of GNS/PU composites was significantly improved.

New method for preparing graphene by peeling graphite and facile fabrication of bulk Bi0.45Sb1.55Te3.02/graphene composites with dense texture and high ZT

RSC Advances ◽  
2015 ◽  
Vol 5 (53) ◽  
pp. 42492-42499 ◽  
Author(s):  
Jingying Cui ◽  
Shanming Li ◽  
Qing Hao ◽  
Huaizhou Zhao ◽  
Hongbo Zhao ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
New Method ◽  
Graphene Sheets ◽  
Facile Fabrication

The incorporated graphene sheets acted as a growth template and result in dense texture with laminates, an increased Seebeck efficient, a decreased thermal conductivity, and therefore a 25%-enhanced-ZT in pressure direction.

Strain engineering of phonon thermal transport properties in monolayer 2H-MoTe2

2017 ◽  
Vol 19 (47) ◽  
pp. 32072-32078 ◽  
Author(s):  
Aamir Shafique ◽  
Young-Han Shin
Keyword(s):  
Thermal Conductivity ◽  
First Principles ◽  
Lattice Thermal Conductivity ◽  
Boltzmann Transport Equation ◽  
Strain Engineering ◽  
First Principles Calculations ◽  
Boltzmann Transport ◽  
Phonon Group Velocity ◽  
Phonon Lifetime ◽  
Phonon Properties

The effect of strain on the phonon properties such as phonon group velocity, phonon anharmonicity, phonon lifetime, and lattice thermal conductivity of monolayer 2H-MoTe2is studied by solving the Boltzmann transport equation based on first principles calculations.

scholarly journals Multiscale modeling of thermal conductivity of polycrystalline graphene sheets

Nanoscale ◽  
2014 ◽  
Vol 6 (6) ◽  
pp. 3344-3352 ◽  
Author(s):  
Bohayra Mortazavi ◽  
Markus Pötschke ◽  
Gianaurelio Cuniberti
Keyword(s):  
Thermal Conductivity ◽  
Effective Thermal Conductivity ◽  
Multiscale Modeling ◽  
Graphene Sheets ◽  
Multiscale Approach

We developed a multiscale approach to explore the effective thermal conductivity of polycrystalline graphene sheets.

scholarly journals Insights into the thermal conductivity of MOF-5 from first principles

RSC Advances ◽  
2021 ◽  
Vol 11 (58) ◽  
pp. 36928-36933
Author(s):  
Shenglong Zhang ◽  
Jian Liu ◽  
Linhua Liu
Keyword(s):  
Thermal Conductivity ◽  
First Principles ◽  
Thermal Transport ◽  
Strain Engineering ◽  
First Principles Calculations ◽  
Metal Substitution

The mechanism of thermal transport in MOF-5 and the tailoring strategies of thermal conductivity κ via metal substitution and strain engineering were investigated by first-principles calculations.

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