Light induced selective heating of nanostructured pyrolitic graphite surfaces investigated by Raman scattering
Artikel i vetenskaplig tidskrift, 2013
Nanostructured surfaces of highly oriented pyrolytic graphite (HOPG) were characterized by Raman spectroscopy. The disc-shape nanostructures similar to 110 nm high and with two different diameters similar to 147 and 217 nm are prepared on HOPG using hole-mask colloidal lithography and oxygen reactive ion etching. Significant roughening of the HOPG surface is introduced by the nano-fabrication process, but the nano-disc structures preserves their crystalline structure. Resonant light absorption results in selective heating of nanostructures, although the surrounding medium remains relatively unaffected. Temperature differences of up to 350 K were measured under irradiation with similar to 11 mW/mu m(2). Further increase of the light intensity leads to combustion of structures.
fabrication
oxidation
spectroscopy
lithography
Highly oriented pyrolitic graphite
spectra
oriented pyrolytic-graphite
oxygen plasma
Nanostructured
air
carbon nanotubes
Light induced selective heating
Författare
J. F. Cardenas
Norut Narvik AS
Hans Fredriksson
Chalmers, Teknisk fysik, Kemisk fysik
Bengt Herbert Kasemo
Chalmers, Teknisk fysik, Kemisk fysik
Dinko Chakarov
Chalmers, Teknisk fysik, Kemisk fysik
Chemical Physics
0301-0104 (ISSN)
Vol. 415 232-236Ämneskategorier
Fysikalisk kemi
DOI
10.1016/j.chemphys.2013.01.023