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Thermal conductivity of graphene nanoribbons usually decreases quickly with the increase of tensile strain due to the softened phonon modes and increased lattice anharmonicities. In this work, we present a new design of graphene nanoribbon structures—serpentine graphene nanoribbons (SGNRs) and demonstrate that thermal conductivity of SGNRs increases with the increase of tensile strain through nonequilibrium...
A Fe–N–C catalyst was prepared by pyrolyzing carbon black supported Fe–imidazole complexes. The effect of different pyrolysis temperatures on the catalysts’ oxygen reduction reaction (ORR) activity was investigated by electrochemical rotating disk electrode tests in 0.5M H 2 SO 4 . The Fe–N–C catalyst heat-treated at 700°C was found to display the best ORR activity with a highest half-wave...
The mechanical compliance of vertically aligned carbon nanotube (VACNT) films renders them promising as interface materials that can accommodate thermal expansion mismatch. Here we study the relationship between the detailed morphology and elastic modulus of multi-walled VACNT films with thicknesses ranging from 98 to 1300μm. A systematic analysis of scanning electron micrographs reveals variations...
Owing to their unique mechanical and thermal properties, vertically aligned carbon nanotube (VACNT) films are promising for use as advanced thermal interface materials. While there has been much research on the thermal properties of VACNT films, the mechanical modulus along the in-plane direction has received little attention. This paper reports a new technique for measuring this property using the...
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