SERS study of rotational isomerization of cysteamine induced by magnetic pulling force

Langmuir : the ACS Journal of Surfaces and Colloids
Takeyoshi Goto, H Watarai

Abstract

The effects of unidirectional pulling forces on covalently bridged cysteamine between superparamagnetic particles and Ag nanoparticles (NPs) were studied with SERS spectroscopy. With an increase in the pulling force from 0 to 100 pN per magnetic particle, the nu(C-S)(Trans)/nu(C-S)(Gauche) intensity ratio was increased from 0.6 to 1.08, the Raman frequency of nu(C-S)(Trans) was shifted from 716 to 719 cm(-1), and the Raman bands associated with the amide groups were diminished. From these observations, it was concluded that the magnetic forces induced the extension of distance between the magnetic particle surface and the Ag NP surface and the rotational isomerization equilibrium of SC-CN was shifted from the gauche to the trans conformation with the longer molecular length.

References

Mar 1, 1997·Biophysical Journal·M D WangS M Block
Mar 12, 1999·Science·M GrandboisH E Gaub
Jun 14, 2000·Current Opinion in Structural Biology·C BustamanteD Smith
Dec 7, 2000·Biophysical Journal·O H WillemsenC G Figdor
Dec 7, 2000·Progress in Biophysics and Molecular Biology·J ZlatanovaS H Leuba
May 8, 2001·Annual Review of Biophysics and Biomolecular Structure·E Evans
Nov 21, 2001·Nature Reviews. Molecular Cell Biology·B GeigerK M Yamada
May 7, 2002·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·H Watarai, M Namba
Mar 18, 2005·Journal of Applied Physiology·Penelope C Georges, Paul A Janmey
May 14, 2005·Analytical Chemistry·Claudia DanilowiczMara Prentiss
May 25, 2005·Journal of Chromatography. a·Yoshinori Iiguni, Hitoshi Watarai
Nov 17, 2005·Journal of Cellular Physiology·Tanmay P LeleDonald E Ingber
Jan 7, 2006·Nature·Jeff GoreCarlos Bustamante
Apr 28, 2006·The Journal of Physical Chemistry. B·G Kavitha, Chandrabhas Narayana
May 13, 2006·Annual Review of Biophysics and Biomolecular Structure·Viola Vogel
Jan 11, 2007·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Yoshinori Iiguni, Hitoshi Watarai
Jul 13, 2007·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Takeyoshi GotoHitoshi Watarai
Apr 30, 2008·Chemical Society Reviews·Steven E J Bell, Narayana M S Sirimuthu

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Citations

Dec 3, 2014·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Jumin HaoQingwu K Wang
Apr 13, 2012·Journal of Colloid and Interface Science·Jumin HaoXiaoguang Meng
Jul 4, 2015·Chemical Communications : Chem Comm·Kai-Xin XieYao-Qun Li
Mar 18, 2017·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Shin Wakiyama, Hitoshi Watarai
Jan 29, 2020·Talanta·Lindy M ShermanJon P Camden
May 30, 2017·Colloids and Surfaces. B, Biointerfaces·Anna BarbaszMaciej Roman

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