Nano Archive

Photoresponsive polymer gel microvalves controlled by local light irradiation

Sugiura, Shinji and Sumaru, Kimio and Ohi, Katsuhide and Hiroki, Kazuaki and Takagi, Toshiyuki and Kanamori, Toshiyuki (2007) Photoresponsive polymer gel microvalves controlled by local light irradiation. Sensors and Actuators A: Physical, 140 (2). 176 - 184.

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This paper presents independent control of multiple microvalves, which are opened by local light irradiation. The application of photoresponsive polymer gel, which was developed by our research group, to photoresponsive microvalve was systematically examined. Photoresponsive polymer gels, which were composed of poly(N-isopropylacrylamide) functionalized with spirobenzopyran chromophore (pSPNIPAAm), were fabricated by in situ photo-polymerization at the desired positions in microchannels. Blue light irradiation to the pSPNIPAAm gels induced shrinkage of the gels and caused the microvalves composed of the gels to open. Local light irradiation to the discrete microvalves enabled independent control of three photoresponsive polymer gel microvalves, which had been fabricated on a single microchip. Each microvalve was opened by 18–30 s light irradiation.

Item Type:Article
Uncontrolled Keywords:Microvalve; Photoresponsive polymer gel; Fluid control; Local light irradiation; In situ photopolymerization; Lab-on-a-chip
Subjects:Analytical Science > Nanotechnology for sensing and actuating
ID Code:4874
Deposited By:SPI
Deposited On:24 Apr 2009 15:26
Last Modified:24 Apr 2009 15:26

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