Journal
OPTICS EXPRESS
Volume 21, Issue 1, Pages 1281-1286Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.21.001281
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Funding
- National Natural Science Foundation of China [60907036, 61036012, 61275217]
- National Science and technology support program [2012BAK08B05]
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A gold nanorod-facilitated optical heating method for droplets in microfluidic chips is reported. Individual and stream nanoliter level droplets containing gold nanorods are heated by a low power 808-nm-wavelength laser. Owing to the high photothermal conversion efficiency of gold nanorods, a droplet temperature of 95 degrees C is achieved by employing a 13.6 mW laser with good reproducibility. The heating and cooling times are 200 and 800 ms, respectively, which are attributed to the fast thermal-transfer rates of the droplets. By controlling the irradiation laser power, the temperature cycles for polymerase chain reaction are also demonstrated. (C)2013 Optical Society of America
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