Refractive-index-driven separation of colloidal polymer particles using optical chromatography
Refractive-index-driven separation of colloidal polymer particles using optical chromatography
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DOI：
10.1063/1.1635984
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发表时间：
2003-12-22
影响因子：
4
通讯作者：
Terray, AV
中科院分区：
文献类型：
--
作者：
Hart, SJ;Terray, AV
分离等效大小的聚苯乙烯，n=1.59，聚（甲基丙烯酸甲酯），n=1.49，和二氧化硅，n=1.43，珠已完成使用光学色谱法。使用玻璃流动池进行光学分离，该玻璃流动池允许光学捕获激光器被轻微地聚焦到流体路径中以对抗流体流动。由于流体和光学力的平衡而发生分离;当由于流体流动而产生的力等于辐射压力时，颗粒停止。基于折射率光学分离颗粒的能力为基于化学特性以及尺寸表征胶体样品开辟了途径。(C)2003年，美国物理学会。
Separation of equivalently sized polystyrene, n=1.59, poly(methylmethacrylate), n=1.49, and silica, n=1.43, beads has been accomplished using optical chromatography. The optical separations were performed using a glass flowcell that permits the optical trapping laser to be lightly focused into the fluid pathway against the fluid flow. Separation occurs due to the balance of fluid and optical forces; particles come to rest when the force due to the fluid flow equals the radiation pressure force. The ability to optically separate particles based upon their refractive index opens avenues for the characterization of colloidal samples based upon chemical characteristics, in addition to size. (C) 2003 American Institute of Physics.