Thermal Conductivity of Suspended Graphene with Defects
arXiv:1603.05286 · doi:10.1039/c6nr03470e
Abstract
We investigate the thermal conductivity of suspended graphene as a function of the density of defects, ND, introduced in a controllable way. Graphene layers are synthesized using chemical vapor deposition, transferred onto a transmission electron microscopy grid, and suspended over ~7.5-micrometer size square holes. Defects are induced by irradiation of graphene with the low-energy electron beam (20 keV) and quantified by the Raman D-to-G peak intensity ratio. As the defect density changes from 2.0x10^10 cm-2 to 1.8x10^11 cm-2 the thermal conductivity decreases from ~(1.8+/-0.2)x10^3 W/mK to ~(4.0+/-0.2)x10^2 W/mK near room temperature. At higher defect densities, the thermal conductivity reveals an intriguing saturation behavior at a relatively high value of ~400 W/mK. The thermal conductivity dependence on defect density is analyzed using the Boltzmann transport equation and molecular dynamics simulations. The results are important for understanding phonon - point defect scattering in two-dimensional systems and for practical applications of graphene in thermal management.
arXiv comment23 pages, 6 figures
References in corpus (28)
- Thermal Properties of Graphene, Carbon Nanotubes and Nanostructured Carbon Materials
- Quantifying defects in graphene via Raman spectroscopy at different excitation energies
- Probing the Nature of Defects in Graphene by Raman Spectroscopy
- Measurement of the Optical Conductivity of Graphene
- Control and Characterization of Individual Grains and Grain Boundaries in Graphene Grown by Chemical Vapor Deposition
- Graphene -- Based Nanocomposites as Highly Efficient Thermal Interface Materials
- Thermal conduction in classical low-dimensional lattices
- Dimensional crossover of thermal transport in few-layer graphene materials
- Optimized Tersoff and Brenner empirical potential parameters for lattice dynamics and phonon thermal transport in carbon nanotubes and graphene
- Raman Spectroscopy of Graphene Edges
- Thermal Properties of Isotopically Engineered Graphene
- From Point Defects in Graphene to Two-Dimensional Amorphous Carbon
- Theory of double-resonant Raman spectra in graphene: intensity and line shape of defect-induced and two-phonon bands
- Graphene-Graphite Quilts for Thermal Management of High-Power GaN Transistors
- Thermal conductivity of graphene flakes: Comparison with bulk graphite
- Modification of Graphene Properties due to Electron-Beam Irradiation
- Thermal Properties of the Hybrid Graphene-Metal Nano-Micro-Composites: Applications in Thermal Interface Materials
- Breakdown Current Density of Graphene Nano Ribbons
- Anomalous Size Dependence of the Thermal Conductivity of Graphene Ribbons
- Effect of substrate modes on thermal transport in supported graphene
- Raman Scattering at Pure Graphene Zigzag Edges
- High-Field Electrical and Thermal Transport in Suspended Graphene
- Effect of Grain Boundaries on Thermal Transport in Graphene
- Tuning Optical Conductivity of Large-Scale CVD Graphene by Strain Engineering
- Heat conduction in a three dimensional anharmonic crystal
- Tuning of Graphene Properties via Controlled Exposure to Electron Beams
- Phonon and Thermal Properties of Exfoliated Tantalum Diselenide Thin Films
- Tunable optical absorption and interactions in graphene via oxygen plasma
Cited by in corpus (23)
- High thermal conductivity of high-quality monolayer boron nitride and its thermal expansion
- Phononic thermal properties of two-dimensional materials
- Raman Optothermal Technique for Measuring Thermal Conductivity of Graphene and Related Materials
- Thermal Conductivity of Suspended Few-Layer MoS2
- Defect-Dependent Corrugation in Graphene
- Strong thermal transport along polycrystalline transition metal dichalcogenides revealed by multiscale modelling for MoS2
- Effect of processing conditions on the thermal and electrical conductivity of poly (butylene terephthalate) nanocomposites prepared via ring-opening polymerization
- Length dependent lattice thermal conductivity of single \& multi layered hexagonal boron nitride: A first-principles study using the Callaway-Klemens \& real space super cell methods
- Properties of graphene-related materials controlling thermal conductivity of their polymer nanocomposites
- Thermal Transport in Turbostratic Multilayer Graphene
- Thermal transport in semiconductor nanostructures, graphene and related two-dimensional materials
- Chemical-Vapor-Deposited Graphene as a Thermally Conducting Coating
- Dramatic effects of vacancies on phonon lifetime and thermal conductivity in graphene
- Nanomechanical spectroscopy of 2D materials
- Operability timescale of defect-engineered graphene
- Deterministic Covalent Organic Functionalization of Monolayer Graphene with 1,3-Dipolar Cycloaddition Via High Resolution Surface Engineering
- Substrate surface effects on electron-irradiated graphene
- Grain boundary-limited thermal transport in suspended thin graphite across an unexplored thickness regime
- Probing divacancy defects in a zigzag graphene nanoribbon through RKKY exchange interaction
- Acoustic phonon-restricted four-phonon interactions: Impact on thermal and thermoelectric transport in monolayer h-NbN
- Spatially mapping the thermal conductivity of graphene by an opto-thermal method
- Review of Graphene-based Thermal Polymer Nanocomposites: Current State of the Art and Future Prospects
- Noncured Graphene Thermal Interface Materials: Minimizing the Thermal Contact Resistance