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

Jeong Yong Lee; Hyun Wook Jung; Jae Chun Hyun

Korea-Australia Rheology Journal, Vol.24, No.4, 333-337, December, 2012

DOI10.1007/s13367-012-0040-z Export Citation

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

Jeong Yong Lee, Hyun Wook Jung^†, and Jae Chun Hyun

Department of Chemical and Biological Engineering, Korea University, Seoul, 136-713, Republic of Korea

E-mail:

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.

Keywords:xanthan;rotational relaxation time;Brownian dynamics;polyelectrolytes;single molecule tracking

[References]

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[1] Bakajin OB, Duke TAJ, Chou CF, Chan SS, Austin RH, Cox EC, Phys. Rev. Lett., 80, 2737 (1998)

[2] Balducci A, Mao P, Han JY, Doyle PS, Macromolecules, 39(18), 6273 (2006)

[3] Choung S, Chun MS, Kim C, J. Korean Phys. Soc., 59, 2847 (2011)

[4] Chun MS, Korean J. Chem. Eng., 27(2), 416 (2010)

[5] Crocker JC, Grier DG, J. Colloid Interface Sci., 179(1), 298 (1996)

[6] Ermak DL, McCammon JA, J. Chem. Phys., 69, 1352 (1978)

[7] Hsieh CC, Balducci A, Doyle PS, Macromolecules, 40(14), 5196 (2007)

[8] Jeon J, Chun MS, J. Chem. Phys., 126, 154904 (2007)

[9] Jo K, Chen YL, de Pablo JJ, Schwartz DC, Lab Chip., 9, 2348 (2009)

[10] Kang H, Ahn KH, Lee SJ, Korea-Aust. Rheol. J., 22(1), 11 (2010)

[11] Lee JY, Chun MS, Jung HW, Hyun JC, Macromol. Res., 20(11), 1163 (2012)

[12] Lin PK, Fu CC, Chen YL, Chen YR, Wei PK, Kuan CH, Fann WS, Phys. Rev. E., 76, 011806 (2007)

[13] Liu YG, Jun YG, Steinberg V, J. Rheol., 53(5), 1069 (2009)

[14] Stein D, van der Heyden FHJ, Koopmans WJA, Dekker C, Proc. Natl. Acad. Sci. U.S.A., 103, 15853 (2006)

[15] Victor JM, J. Chem. Phys., 95, 600 (1991)

[16] Vilgis TA, Borsali R, Phys. Rev. A., 43, 6857 (1991)

[17] Zhang L, Greenfield ML, J. Chem. Phys., 132, 184502 (2010)