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Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/52525
Título

A hydrogel-actuated environmentally sensitive microvalve for active flow control

AutorBaldi Coll, Antonio; Gu, YD; Loftness, PE; Siegel, RA; Ziaie, B
Palabras claveMicrovalve
Microfluidics
Hydrogel
Smart Material
Drug Delivery
Fecha de publicaciónoct-2003
EditorInstitute of Electrical and Electronics Engineers
CitaciónJournal of Microelectromechanical Systems
ResumenThis paper reports on the fabrication and test of a hydrogel-actuated microvalve that responds tochanges in the concentration of specific chemical species in an external liquid environment. Themicrovalve consists of a thin hydrogel, sandwiched between a stiff porous membrane and a flexiblesilicone rubber diaphragm. Swelling and deswelling of the hydrogel, which results from the diffusion ofchemical species through the porous membrane is accompanied by the deflection of the diaphragm andhence closure and opening of the valve intake orifice. A phenylboronic acid based hydrogel was used toconstruct a smart microvalve that responds to the changes in the glucose and pH concentrations. Thefastest response time (for a pH concentration cycle) achieved was 7 minutes using a 30 μm thick hydrogeland a 60 μm thick porous membrane with 0.1 μm pore size and 40% porosity.
Versión del editorhttp://dx.doi.org/10.1109/JMEMS.2003.818070
URIhttp://hdl.handle.net/10261/52525
DOI10.1109/JMEMS.2003.818070
ISSN1057-7157
Aparece en las colecciones: (IMB-CNM) Artículos
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