Photodegradation of optically trapped polystyrene beads at 442 nm

V. Subramanyan Namboodiri, Sajan D. George, Steffen Hardt

Research output: Contribution to journalArticle

Abstract

Polystyrene particles of different sizes are optically trapped with a gaussian beam from a He-Cd laser operating at 442 nm. The particles are observed to exhibit luminescence after a certain trapping time followed by an escape from the optical trap. The observed luminescence is explained in terms of the photodegradation of the polystyrene backbone. It is speculated that these chemical modifications also play a role for the escape of the particles from the trap. Variations of the particle size and the laser power show that these parameters have a great influence on the observed phenomena.

Original languageEnglish
Pages (from-to)520-523
Number of pages4
JournalWorld Academy of Science, Engineering and Technology
Volume70
Publication statusPublished - 01-09-2010

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Photodegradation
Luminescence
Polystyrenes
Gaussian beams
Lasers
Chemical modification
Particle size

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

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abstract = "Polystyrene particles of different sizes are optically trapped with a gaussian beam from a He-Cd laser operating at 442 nm. The particles are observed to exhibit luminescence after a certain trapping time followed by an escape from the optical trap. The observed luminescence is explained in terms of the photodegradation of the polystyrene backbone. It is speculated that these chemical modifications also play a role for the escape of the particles from the trap. Variations of the particle size and the laser power show that these parameters have a great influence on the observed phenomena.",
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Photodegradation of optically trapped polystyrene beads at 442 nm. / Subramanyan Namboodiri, V.; George, Sajan D.; Hardt, Steffen.

In: World Academy of Science, Engineering and Technology, Vol. 70, 01.09.2010, p. 520-523.

Research output: Contribution to journalArticle

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