This paper will report on efforts to develop an enabling nanotechnology compatible directionally sensitive optical radiation sensor (VCELL) prototype. The proposed sensor is a novel silicon optical sensor that is directionally sensitive to incident light without the usual necessity of requiring mechanical assemblies for directing impinging radiation. The VCELL can be integrated into the front end of a single nanochip guidance system for future space exploration systems requiring extremely small size (mass constrained and power constrained) such as small robots, picosatellites and sensor networks, etc. The VCELL will enable a low cost miniature optical sensor for future MSFC Mission Area applications. Among these are a Sun pointer for MARS satellites, landers and rovers and various other scientific spacecraft such as small communications satellites, remote sensing satellites, sun sensors for rovers for daylight directional navigation.
Voltammetry is an electrochemical sensing technique that has been in use for almost a century using macro-scale electrodes. This paper discusses initial investigations into the development of a prototype voltammetric sensing system that uses electrodes with nano-scale features to reduce the size of the electrodes and increase performance. Modeling, fabrication, and testing are discussed.
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