title: Laser scanning photothermal microscopy: fast detection and imaging of gold nanoparticles.
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.
authors.affiliation: Department of Physics, Birla Institute of Technology and Science, Pilani - K K Birla Goa Campus, Zuarinagar, Goa, India.
authors.forename: S
authors.initials: S
authors.lastname: Arunkarthick
authors.forename: M M
authors.initials: MM
authors.lastname: Bijeesh
authors.forename: Geetha K
authors.initials: GK
authors.lastname: Varier
authors.forename: Meenal
authors.initials: M
authors.lastname: Kowshik
authors.forename: P
authors.initials: P
authors.lastname: Nandakumar
keywords: Gold nanoparticles; laser scanning microscopy; photothermal imaging; pixel dwell time