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- Title
LASER INDUCED SURFACE PROCESSING WITH GOLD NANOPARTICLE ARRAYS EMBEDDED IN A TRANSPARENT MATRIX.
- Authors
ASKARI, ALI ASGHAR; BAHRAMPOUR, ALI REZA
- Abstract
Gold nanoparticles are widely used as high efficient photon-thermal energy converters in a broad range of applications. This paper presents a theoretical investigation on using the optothermal properties of gold nanoparticle arrays to generate nanoscale molten and rubbery regions on the surface of an amorphous polymeric film. Nanoparticles are assumed to be embedded in a transparent silica layer and illuminated with a 7.5 ns pulsed laser at 532 nm. Simulation results are presented for systems with single gold nanoparticles, dimers and chains. Both electromagnetic and thermal interaction between nanoparticles are found to be important factors in determining the result of surface processing. This effect allows us to control the shape and spatial characteristics of the phase transmitted regions with various parameters such as particles size, incident light fluence, polarization and direction, interparticle distance and chain length. Nanopatterning is a promising tool for fabricating nanoscale devices. This work presents a new approach to the nanopatterning technology based on the use of optothermal properties of gold nanoparticle arrays embedded in a transparent matrix (carrier layer). The carrier surface is covered with a polymeric film, which to be patterned. It has been investigated that how the array properties and laser source characteristics affect the shape of molten and rubbery regions generated in the film. Simulation results show that this method can be suggested as an efficient, high-resolution and flexible nanopatterning technique.
- Subjects
GOLD nanoparticles; EMBEDDINGS (Mathematics); LASERS; PHOTONS; ELECTROMAGNETIC interactions; PHASE transitions; PHOTOTHERMAL spectroscopy
- Publication
NANO, 2013, Vol 8, Issue 1, p-1
- ISSN
1793-2920
- Publication type
Article
- DOI
10.1142/S1793292013500033