title: Gold nanorod-facilitated localized heating of droplets in microfluidic chips.
abstract: 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 °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.
authors: State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou 310027, China.
authors: Zhiyong
authors: Z
authors: Li
authors: Pan
authors: P
authors: Wang
authors: Limin
authors: L
authors: Tong
authors: Lei
authors: L
authors: Zhang
mesh_terms: D004129:Dimethylpolysiloxanes / Q000737:chemistry; D004867:Equipment Design; D006046:Gold / Q000737:chemistry*; D007834:Lasers; D053768:Metal Nanoparticles / Q000737:chemistry; D044085:Microfluidics / Q000295:instrumentation*; D046529:Microscopy, Electron, Transmission / Q000379:methods; D043942:Nanotubes / Q000737:chemistry*; D055095:Optics and Photonics; D016133:Polymerase Chain Reaction / Q000379:methods; D015203:Reproducibility of Results; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000737:chemistry
chemical_list: D004129:Dimethylpolysiloxanes; D014867:Water; C013830:baysilon; D006046:Gold