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A simple, cost-effective, instrumental-free prototyping process has been developed for fabricating flexible, multilayer colorimetric microfluidic sensor. A hand-hold punch was used to make microfluidic sensor pattern with no use of any expensive instruments (laser cutter, cutting plotter, screen printer, wax printer, etc.). Colorimetric analysis was carried out using a smartphone camera as a reader...
High temperature piezoelectric materials serving at harsh environment without failure are desired for structural health monitoring and/or non destructive evaluation of the modern aerospace structures at elevated temperatures (above 600°C). In this report, different high temperature piezoelectric crystals, including the langasite (LGS) type crystals and GaPO4 in trigonal system, melilite type and fresnoite...
In this report, the dielectric and hydrostatic piezoelectric properties of the monoclinic bismuth triborate crystals (BiB3O6, BIBO) were investigated at ambient temperature for potential hydrophone application. The pressure dependence of the hydrostatic charge and voltage coefficients dielectric properties (dh and gh), and hydrostatic figure of merit (FOM) dh×gh, were also studied. Results indicated...
In this report, the bismuth triborate piezoelectric crystals,α-BiB3O6(BIBO), were investigated for potential sensor applications. The dielectric, piezoelectric and electromechanical properties were evaluated by using the impedance method, where the largest piezoelectric charge coefficients were found for d22, being on the order of 40.0pC/N, with corresponding piezoelectric voltage coefficients g22...
La3Ga5.5Nb0.5O14 (LGN) and La3Ga5.5Ta0.5O14 (LGT) with trigonal 32 symmetry were grown by Czochralski (CZ) method. High Resolution X-Ray Diffraction (HRXRD) measurement was carried out on the as-grown LGN and LGT crystals for crystal quality evaluation. Frequency temperature dependent behaviors were investigated to explore the zero temperature coefficient of frequency (TCF) cuts at elevated temperature...
This paper aims at designing a kind of advanced micro-force sensor that can measure force in the range of sub- micro-Newton (muN). To accurately measure the micro interactive force (for example, adhesion, surface tension, friction, and assembly force) acting on micro devices during micromanipulation, the polyvinylidene fluoride (PVDF) is fabricated highly sensitive force sensors. This paper illustrates...
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