Rotational relaxation time of polyelectrolyte xanthan chain via single molecule tracking method

Jeong Yong Lee, Hyun Wook Jung, Jae Chun Hyun

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Effect of solvent viscosity on the longest rotational relaxation time of xanthan molecule has been examined using a single molecule tracking method. Incorporating inverted epi-fluorescence microscope and chargedcoupled device (CCD) camera, various features of xanthan (i.e., radius of gyration, orientation angle, etc.) were interpreted by image processing algorithm from the captured real xanthan images. From the best-fit of the autocorrelation function on the orientation angle, the longest rotational relaxation time was effectively determined. Rotational relaxation time increases with the medium solvent viscosity due to the slow movement of xanthan molecule. It is confirmed that there is a good agreement between experiments and Brownian dynamics simulations on the relaxation patterns of xanthan chain.

Original languageEnglish
Pages (from-to)333-337
Number of pages5
JournalKorea Australia Rheology Journal
Volume24
Issue number4
DOIs
Publication statusPublished - 2012 Dec

Keywords

  • Brownian dynamics
  • Polyelectrolytes
  • Rotational relaxation time
  • Single molecule tracking
  • Xanthan

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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