石墨烯导热研究进展
Recent Progress on Thermal Conduction of Graphene
(a) Graphene film roll with 4.5-inch width (i) made by electrospray deposition integrated with a roll-to-roll process. (b) Cross-sectional SEM image of pristine graphene film made by electrospray deposition showing a layer-by-layer assembly. (f) image of pristine graphene film, graphene film annealed at 1800 ℃ (middle) and 2200 ℃ (right). (d–e) Electrical and thermal properties of freestanding graphene films: (d) Graphene film without thermal annealing and (e) annealed graphene film. The increased density is caused by mechanical press resulting in a more film compact structure. (c–e), Defect recovery, removal of functional groups and improvement of crystallinity of freestanding graphene film by high temperature annealing: (c) Raman spectra, (d) XPS and (e) XRD patterns of the as‐made graphene films and high temperature annealed graphene films. The magnified (by 5 times) O 1s peak has been shown in (d) on the right top of each XPS spectrum. The XRD pattern of pure graphite is included in (e) for comparison. Adapted with permission from Ref.
