Nanoliter-sized overheated reactor

We report on a microfluidic system formed by 200 nl water droplets, encapsulated by a 600 nl mineral oil placed on a hydrophobically coated glass microscope cover slip. The micromachined heater underneath the glass was able to heat up the sample at a heating rate of 650 °C/s, heating the water sampl...

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Bibliographic Details
Published in:Applied physics letters 2015-01, Vol.106 (2)
Main Authors: Neužil, P., Sun, W., Karásek, T., Manz, A.
Format: Article
Language:English
Subjects:
Applied physics
Autoclaves
Autoclaving
BOILING
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
DROPLETS
GLASS
HEAT
HEATING RATE
INTERFACES
Micromachining
MICROSCOPES
Mineral oils
NUCLEATION
OILS
PETROLEUM
SLIP
WATER
Water drops
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Summary:We report on a microfluidic system formed by 200 nl water droplets, encapsulated by a 600 nl mineral oil placed on a hydrophobically coated glass microscope cover slip. The micromachined heater underneath the glass was able to heat up the sample at a heating rate of 650 °C/s, heating the water sample up to 200 °C in less than 2 s. The sample/glass and the sample/oil interface did not have nucleation centers, showing that the sample reached a superheated stage without the necessity of being pressurized to suppress boiling. This method can be utilized for various applications currently being conducted in autoclaves.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4905851