TY - GEN
T1 - Multiple modes of laser-induced pattern formation in nanoscopic Co films
AU - Favazza, Christopher
AU - Trice, Justin
AU - Sureshkumar, Radhakrishna
AU - Kalyanaraman, Ramki
PY - 2007
Y1 - 2007
N2 - Dewetting instabilities in nanoscopic Co films, induced by uniform multiple ns pulse laser irradiation, leads to a system of nanoparticles with robust spatial order. On the other hand, irradiation by non-uniform laser intensity, such as with a two beam laser interference pattern generates a quasi two-dimensional pattern of nanoparticles possessing long range order (LRO) and short range order (SRO). Here we discuss the various instabilities that are responsible for the production of these dissimilar patterns and length scales on the basis of their time scales. For the case of single beam irradiation, the film progresses in a manner that can be attributed to classical spinodal dewetting. Pattern formation from interference irradiation is the result of time scale-based selection of competing processes, which can be chosen by controlling the film thickness. This approach promises a simple and cost-effective means to self-assemble various nanostructures.
AB - Dewetting instabilities in nanoscopic Co films, induced by uniform multiple ns pulse laser irradiation, leads to a system of nanoparticles with robust spatial order. On the other hand, irradiation by non-uniform laser intensity, such as with a two beam laser interference pattern generates a quasi two-dimensional pattern of nanoparticles possessing long range order (LRO) and short range order (SRO). Here we discuss the various instabilities that are responsible for the production of these dissimilar patterns and length scales on the basis of their time scales. For the case of single beam irradiation, the film progresses in a manner that can be attributed to classical spinodal dewetting. Pattern formation from interference irradiation is the result of time scale-based selection of competing processes, which can be chosen by controlling the film thickness. This approach promises a simple and cost-effective means to self-assemble various nanostructures.
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M3 - Conference contribution
AN - SCOPUS:40949110201
SN - 9781604234121
T3 - Materials Research Society Symposium Proceedings
SP - 17
EP - 22
BT - Self Assembly of Nanostructures Aided by Ion- or Photon-Beam Irradiation
T2 - 2006 MRS Fall Meeting
Y2 - 27 November 2006 through 1 December 2006
ER -