Documents / Report
This Defense Intelligence Agency reference document, dated 31 March 2010 (DIA-08-1003-020), was one of a series of advanced technology reports produced in FY 2009 under the Advanced Aerospace Weapon System Applications (AAWSA) program. It surveys biosensors and BioMEMS, covering brain-implanted neuroelectrodes, drug-delivery pumps, implantable glucose sensors, brain-machine interfaces, retinal prostheses, microfluidic lab chips, NASA cell culture systems, and microcantilever sensors. It concludes that the field is expanding rapidly toward nanomechanical systems.
UNCLASSIFIED/ }FQA: QFFliIAk Wi&i e•lblf Figure 14. Illustration of the Thermocouple Principle (Guilbeau and Towe, ASU) Figure 15 on the left panel shows a photomicrograph of a thermopile temperature sensor that is made from the metals antimony and bismuth. These metals are vacuum deposited as alternating thin films using a masking process to form horizontal lines of conductive metal. Each pair of lines has a sensing junction and a reference junction. When they are heated on their sensing junction with respect to their reference end (that is exposed to the ambient temperature), they generate a small electrical voltage. Each junction is only a few tens of microns in size so it is possible to place dozens of junctions in series in order to increase the voltage signal. Figure 15 on the right panel shows that there are two banks of thermoelectric sensors with the central common junctions supporting an enzyme gel. Thermopiles are thin film temperature sensors and are differential in nature in that they measure temperature differences, and are thus sensitive enough to detect exceedingly small temperature rises. 18 UNCLASSIFIED/ /f81il 8ffl@Itlll::: 1!181! 8••1:::Y
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Report, from the dia collection. The PDF is mirrored here; the original link is above. 45 pages are in the text index: search them above, or from the library's search.