Optical excitation and detection of vapor bubbles around plasmonic nanoparticles.
Laser-induced generation of the vapor bubbles in water around plasmonic nanoparticles was experimentally studied with optical scattering methods. Nanoparticle-generated bubbles temporally and spatially localize laser-induced thermal field and also amplify optical scattering relatively to that of gold nanoparticles. Bubble lifetimes and threshold fluencies were determined as functions of the laser (pulse duration, fluence, inter-pulse interval), nanoparticle (size, shape, aggregation state) and sample chamber parameters so to optimize bubble generation around plasmonic nanoparticles. Nanoparticle-generated bubbles are suggested as nano-scaled optical sensors and sources of localized thermal and mechanical impact.
Lapotko
Dmitri
D
Laser Cytotechnology Laboratory, A. V .Lykov Heat- and Mass-Transfer Institute, 15 Brovka Street, Minsk, 220072, Belarus. ld@hmti.ac.by
D004307:Dose-Response Relationship, Radiation; D005740:Gases / Q000737:chemistry / Q000528:radiation effects*; D006046:Gold / Q000737:chemistry / Q000528:radiation effects; D008027:Light; D053758:Nanoparticles / Q000737:chemistry* / Q000528:radiation effects*; D010316:Particle Size; D010783:Photometry / Q000379:methods*; D011829:Radiation Dosage; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000379:methods*
D005740:Gases; D006046:Gold