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Laser scanning photothermal microscopy: fast detection and imaging of gold nanoparticles
S Arunkarthick1, M M Bijeesh, Geetha K Varier
1Department of Physics, Birla Institute of Technology and Science, Pilani - K K Birla Goa Campus, Zuarinagar, Goa, India.
Journal of Microscopy
|September 3, 2014
Abstract:
We report on the design and construction of a laser scanning photothermal microscope and present images of gold nanoparticles of size as small as 5 nm. Laser scanning method allows fast image acquisition at 80 μs pixel dwell time so that a 500 × 500 pixel image is acquired in 20 s. Photothermal imaging at fast time scales can have potential applications in variety of fields including tracking of biomolecular transport processes.
