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Novel approaches to the construction of miniaturized analytical instrumentationThis paper focuses on the design, construction, preliminary testing, and potential applications of three forms of miniaturized analytical instrumentation. The first is an optical fiber instrument for monitoring pH and other cations in aqueous solutions. The instrument couples chemically selective indicators that were immobilized at porous polymeric films with a hardware package that provides the excitation light source, required optical components, and detection and data processing hardware. The second is a new form of a piezoelectric mass sensor. The sensor was fabricated by the deposition of a thin (5.5 micron) film of piezoelectric aluminum nitride (AIN). The completed deposition process yields a thin film resonator (TFR) that is shaped as a 400 micron square and supports a standing bulk acoustic wave in a longitudinal mode at frequencies of approx. 1 GHz. Various deposition and vapor sorption studies indicate that the mass sensitivity of the TFR's rival those of the most sensitive mass sensors currently available, though offering such performance in a markedly smaller device. The third couples a novel form of liquid chromatography with microlithographic miniaturization techniques. The status of the miniaturization effort, the goal of which is to achieve chip-scale separations, is briefly discussed.
Document ID
19930016156
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Porter, Marc D. (Iowa State Univ. of Science and Technology Ames, IA, United States)
Otoole, Ronald P. (Iowa State Univ. of Science and Technology Ames, IA, United States)
Coldiron, Shelley J. (Iowa State Univ. of Science and Technology Ames, IA, United States)
Deninger, William D. (Iowa State Univ. of Science and Technology Ames, IA, United States)
Deinhammer, Randall S. (Iowa State Univ. of Science and Technology Ames, IA, United States)
Burns, Stanley G. (Iowa State Univ. of Science and Technology Ames, IA, United States)
Bastiaans, Glenn J. (Iowa State Univ. of Science and Technology Ames, IA, United States)
Braymen, Steve D. (Iowa State Univ. of Science and Technology Ames, IA, United States)
Shanks, Howard R. (Iowa State Univ. of Science and Technology Ames, IA, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1992
Subject Category
Instrumentation And Photography
Report/Patent Number
NAS 1.26:191988
NASA-CR-191988
Accession Number
93N25345
Funding Number(s)
CONTRACT_GRANT: NAG2-722
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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