Publication Type : Journal Article
Publisher : Applied Surface Science
Source : Applied Surface Science, 257(23), 9780, 2011
Url : https://www.sciencedirect.com/science/article/abs/pii/S0169433211008737
Campus : Coimbatore
School : School of Physical Sciences
Year : 2011
Abstract : In this study high temperature conductive graphite surfaces irradiated with megahertz pulse repetition rate femtosecond laser pulses under ambient condition were characterized using electron microscopy and spectroscopy techniques. Scanning electron microscopy analysis of the treated surface shows formation of self assembled weblike nanofibrous structure in and around the laser irradiated spots. Further transmission electron microscopy investigation revealed that this structure was formed due to aggregation of graphite nanoparticles. In addition the broadening of microraman peaks at 1340 and 1580 cm−1 of the laser irradiated sample was due to confinement of optical phonons in graphite nanoparticles. X-ray photoelectron spectroscopy analysis shows a marginal increase of sp2 and sp3 species with laser treated samples as compared to that of untreated samples. The results show that femtosecond laser treatment is rather a simple technique for the direct synthesis graphite nanostructures without significant changes in their chemistry as compared to the bulk.
Cite this Research Publication : Sivakumar, M., B. Tan, K. Venkatakrishnan, Characterization of high temperature conductivegraphite surfaces irradiated with femtosecond laser pulses, Applied Surface Science, 257(23), 9780, 2011, https://doi.org/10.1016/j.apsusc.2011.06.012, IF: 6.182