標題: Laser-trapping assembling dynamics of molecules and proteins at surface and interface
作者: Masuhara, Hiroshi
Sugiyama, Teruki
Rungsimanon, Thitiporn
Yuyama, Ken-ichi
Miura, Atsushi
Tu, Jing-Ru
應用化學系
應用化學系分子科學碩博班
Department of Applied Chemistry
Institute of Molecular science
關鍵字: assembly formation;glycine;laser trapping;protein;urea
公開日期: 2011
摘要: Laser trapping of molecules and proteins in solution at room temperature is made possible by irradiating 1064-nm continuous-wave (CW) laser with power around 1 W. Although conventional small molecules are not trapped at the focal point, molecules that can form clusters upon assembling and proteins whose size is close to 10 nm are gathered, giving unique assembly structure. Glycine in H(2)O shows crystallization, urea in D(2)O gives a millimeter-sized giant droplet, and cobalt oxide-filled ferritin protein confirms assembly followed by precipitation. Solute concentration, solvent, and laser power are important factors for determining trapping and assembling phenomena, and the laser focal position is very critical. These unique behaviors are realized by setting the irradiation at the air/solution surface, inside the solution, and at the glass/solution interface. Laser trapping-induced crystallization, liquid/liquid phase separation, and precipitation are compared with the previous results and considered. After summarizing the results, we describe our future perspective and plans.
URI: http://hdl.handle.net/11536/26006
http://dx.doi.org/10.1351/PAC-CON-10-09-32
ISSN: 0033-4545
DOI: 10.1351/PAC-CON-10-09-32
期刊: PURE AND APPLIED CHEMISTRY
Volume: 83
Issue: 4
起始頁: 869
結束頁: 883
Appears in Collections:Articles