抄録
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.
本文言語 | 英語 |
---|---|
論文番号 | 243704 |
ジャーナル | Applied Physics Letters |
巻 | 103 |
号 | 24 |
DOI | |
出版ステータス | 出版済み - 12月 9 2013 |
外部発表 | はい |
!!!All Science Journal Classification (ASJC) codes
- 物理学および天文学(その他)