Monitoring of spectroscopic changes of a single trapped fission yeast cell by using a Raman tweezers set-up

Başar G., KIN S.

OPTICS COMMUNICATIONS, vol.281, no.19, pp.4998-5003, 2008 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 281 Issue: 19
  • Publication Date: 2008
  • Doi Number: 10.1016/j.optcom.2008.06.074
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.4998-5003
  • Istanbul Technical University Affiliated: Yes


We demonstrate an improvement of the sensitivity of a Raman tweezers set-up, which combines optical tweezers with Raman spectroscopy. The system was tested by taking the Raman spectrum of a 4.6 mu m diameter polystyrene sphere trapped in an aqueous solution. The improvement of sensitivity of the set-up was achieved by adjusting the trap depth for maximum signal to noise ratio (SNR). The maximum SNR was obtained by investigating the Raman peak of a trapped polystyrene sphere at 1001 cm(-1) according to trap depth. With this system, a single trapped living Schizosaccharomyces Pombe yeast cell was sensitively monitored by taking the kinetic Raman spectra for more than 2 h. The relative intensity decrease in amide I and amide III bands, frequency increase in amide I band together with alterations in tyrosine marker band around 850 cm(-1) was observed, which indicates alterations in the hydration state of protein by time progressing. (c) 2008 Elsevier B.V. All rights reserved.