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Light induced selective heating of nanostructured pyrolitic graphite surfaces investigated by Raman scattering

J. F. Cardenas ; Hans Fredriksson (Institutionen för teknisk fysik, Kemisk fysik) ; Bengt Kasemo (Institutionen för teknisk fysik, Kemisk fysik) ; Dinko Chakarov (Institutionen för teknisk fysik, Kemisk fysik)
Chemical Physics (0301-0104). Vol. 415 (2013), p. 232-236.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Highly oriented pyrolitic graphite, Light induced selective heating, Nanostructured, oriented pyrolytic-graphite, carbon nanotubes, oxygen plasma, spectroscopy, oxidation, spectra, lithography, fabrication, air



Denna post skapades 2013-06-05. Senast ändrad 2014-03-24.
CPL Pubid: 177964

 

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Institutioner (Chalmers)

Institutionen för teknisk fysik, Kemisk fysik (1900-2015)

Ämnesområden

Fysikalisk kemi

Chalmers infrastruktur