22 March 2006 Packaged Au-PPy valves for drug delivery systems
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The most common methods for the drug delivery are swallowing pills or receiving injections. However, formulations that control the rate and period of medicine (i.e., time-release medications) are still problematic. The proposed implantable devices which include batteries, sensors, telemetry, valves, and drug storage reservoirs provide an alternative method for the responsive drug delivery system [1]. Using this device, drug concentration can be precisely controlled which enhances drug efficiency and decreases the side effects. In order to achieve responsive drug delivery, a reliable release valve has to be developed. Biocompatibility, low energy consumption, and minimized leakage are the main requirements for such release method. A bilayer structure composed of Au/PPy film is fabricated as a flap to control the release valve. Optimized potentiostatic control to synthesize polypyrrole (PPy) is presented. The release of miniaturize valve is tested and showed in this paper. A novel idea to simultaneously fabricate the device reservoirs as well as protective packaging is proposed in this paper. The solution of PDMS permeability problem is also mentioned in this article.
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Han-Kuan Anthony Tsai, Han-Kuan Anthony Tsai, Kuo-Sheng Ma, Kuo-Sheng Ma, Jim Zoval, Jim Zoval, Lawrence Kulinsky, Lawrence Kulinsky, Marc J. Madou, Marc J. Madou, } "Packaged Au-PPy valves for drug delivery systems", Proc. SPIE 6168, Smart Structures and Materials 2006: Electroactive Polymer Actuators and Devices (EAPAD), 61681E (22 March 2006); doi: 10.1117/12.658742; https://doi.org/10.1117/12.658742

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