Piezoresistive Chemosensoren auf der Basis von Hydrogelen (Piezoresistive Chemical Sensors Based on Hydrogels)

Abstract Hydrogele zeigen in Abhängigkeit von der sie umgebenden Flüssigkeit ein starkes Quellungsvermögen. Dies kann für die Schaffung chemischer Sensoren, z.B. für die Messung des pH-Wertes, ausgenutzt werden. Dafür lassen sich piezoresistive Sensoren nutzen, wobei das quellende Hydrogel zu einer Verformung der Silizium-Biegeplatte des Sensorchips führt. Es wurden die Ausgangsspannung in Abhängigkeit vom pH-Wert untersucht und die für eine hohe Signalreproduzierbarkeit erforderlichen Messbedingungen ermittelt.

[1]  Margarita Guenther,et al.  Application of sensitive hydrogels in chemical and pH sensors , 2004 .

[2]  Andreas Richter,et al.  Electronically controllable microvalves based on smart hydrogels: magnitudes and potential applications , 2003 .

[3]  Andreas Richter,et al.  Temperature and ph-dependent swelling behavior of poly(N-isopropylacrylamide) copolymer hydrogels and their use in flow control , 2003 .

[4]  Andreas Richter,et al.  Poly(vinyl alcohol)/poly(acrylic acid) hydrogels: FT-IR spectroscopic characterization of crosslinking reaction and work at transition point , 1999 .

[5]  K. Arndt,et al.  Poly(vinyl methyl ether) hydrogel formed by high energy irradiation , 2001 .

[6]  C. Hall,et al.  Theory and simulation of the swelling of polymer gels , 2000 .

[7]  Andreas Richter,et al.  Application of sensitive hydrogels in flow control , 2000 .

[8]  Min-Hang Bao,et al.  Micro Mechanical Transducers: Pressure Sensors, Accelerometers and Gyroscopes , 2000 .

[9]  B. Amsden,et al.  Solute Diffusion within Hydrogels. Mechanisms and Models , 1998 .

[10]  D. Beebe,et al.  Equilibrium swelling and kinetics of pH-responsive hydrogels: models, experiments, and simulations , 2002 .

[11]  Needham,et al.  pH and Ion-Triggered Volume Response of Anionic Hydrogel Microspheres. , 1998, Macromolecules.

[12]  Robin H. Liu,et al.  Functional hydrogel structures for autonomous flow control inside microfluidic channels , 2000, Nature.

[13]  Yuandong Gu,et al.  A hydrogel-actuated environmentally sensitive microvalve for active flow control , 2003 .

[14]  K. T. Ramesh,et al.  The actuation of a biomimetic poly(vinyl alcohol)–poly(acrylic acid) gel , 2002, Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences.