(2+1)-Dimensional manipulation of soft biological materials by opto-thermal diffusiophoresis

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In a temperature gradient built by infrared laser heating, polyethylene glycol (PEG) of large concentration moves away from the hot region. The resulting concentration gradient of PEG creates entropic potential well and traps another solute of small concentration due to diffusiophoresis. Here we develop this method to work in two dimensional spaces and time. The steering of laser traps colloids, DNA, and living cells in designed two-dimensional patterns. By modulating laser intensity with time, the protein concentration is periodically controlled in tens of mHz. This method could be useful for a directed assembly of biological materials.

元の言語英語
記事番号243704
ジャーナルApplied Physics Letters
103
発行部数24
DOI
出版物ステータス出版済み - 12 9 2013
外部発表Yes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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