Optical trapping and fluorescence analysis of thermo-responsive poly(N-alkylacrylamide) microgel particles in water

Yuriko Matsumura*, Chie Hosokawa, Hiroyuki Yoshikawa, Kaoru Iwai, Hiroshi Masuhara

*Corresponding author for this work

Research output: Contribution to conferencePaperpeer-review

Abstract

When laser beam was focused into nanoparticle suspensions, nanoparticles can be trapped in the focal spot due to optical gradient force. Here we report the optical trapping and fluorescence analysis of poly(N-isopropylacrylamide) (PNIPAM) and its related polymer microgel particles which were labeled with 4-N-(2-acryloyloxyethyl)-N-methylamino-7-N,N-dimethylaminosulfonyl-2,1, 3-benzoxadiazole (DBD-AE) dispersed in water. The DBD-AE labeled PNIPAM microgel particles were trapped at the focal point by irradiation with cw-Nd 3+:YAG laser (λ = 1064 nm) in water and the fluorescence intensity of the DBD-AE labeled PNIPAM microgel particles excited by diode laser (λ = 405 nm) increased stepwise. We succeeded to fluorescence analysis of trapped single microgel particle.

Original languageEnglish
Number of pages1
StatePublished - 19 Oct 2006
Event55th SPSJ Annual Meeting - Nagoya, Japan
Duration: 24 May 200626 May 2006

Conference

Conference55th SPSJ Annual Meeting
CountryJapan
CityNagoya
Period24/05/0626/05/06

Keywords

  • Fluorescence labeled microgel
  • Microspectroscopy
  • Optical trapping
  • Poly(N-isopropylacrylamide)

Fingerprint Dive into the research topics of 'Optical trapping and fluorescence analysis of thermo-responsive poly(N-alkylacrylamide) microgel particles in water'. Together they form a unique fingerprint.

Cite this