Abstract
This paper reports on the fabrication and testing of a hydrogel-actuated microvalve that responds to changes in the concentration of specific chemical species in an external liquid environment. It consists of a hydrogel disc sandwiched between a porous plate and a flexible silicone rubber membrane. Swelling of the hydrogel produced by diffusion of chemical species through the porous plate results in the deflection of the membrane and closure of the valve intake orifice. A phenylboronic acid based hydrogel was used to construct a smart microvalve that opens and closes in response to the changes in the glucose concentration and pH. The fastest response time achieved was 16 minutes using a 70 μm thick hydrogel and a 60 μm porous back plate.
| Original language | English (US) |
|---|---|
| Title of host publication | Proceedings of the IEEE Micro Electro Mechanical Systems (MEMS) |
| Pages | 105-108 |
| Number of pages | 4 |
| State | Published - Jan 1 2002 |
| Event | 15th IEEE International Conference on Micro Electro Mechanical Systems MEMS 2002 - Las Vegas, NV, United States Duration: Jan 20 2002 → Jan 24 2002 |
Other
| Other | 15th IEEE International Conference on Micro Electro Mechanical Systems MEMS 2002 |
|---|---|
| Country/Territory | United States |
| City | Las Vegas, NV |
| Period | 1/20/02 → 1/24/02 |