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In his work we investigate the thermoelectric performance of SrTiO3 thin films doped with Nb grown using pulsed laser deposition on crystalline LaAlO3 substrates. We show that a large enhancement of the Seebeck coefficient is observed for thin films with thicknesses below 10 nm in accordance with previous publications. In addition, we investigated the thermal conductivity of the thin films using the...
This work describes the development and testing of a nitrate-selective electrochemical sensor using doped polypyrrole nanowires in a flow-through micro-fluidic. Doping of polypyrrole nanowires was performed galvanostatically in the presence of NaNO3. Amperometry and flow-through analysis were performed to evaluate the sensor performance for determination of nitrate ions in two sets of calibration...
Detection and estimation of nitrate levels is important to maintain ecosystem dynamics, marine cycle balance, prevent impact on human health. In this work, a micro-fluidic nitrate-selective electrochemical sensor using doped polypyrrole nanowires is developed. The electrochemical sensor showed excellent current response for two set of calibration solutions (DI water and IAPSO standard seawater) with...
Pressure measurements in marine environment are of utmost importance to better understand the ocean processes, for maritime security and even for tsunami wave detection. In this work, a MEMS reinforced piezoresistive pressure sensor with packaging and protective coatings was tested to achieve both higher sensitivity and larger full scale span compared to conventional single diaphragm. By eliminating...
Out-of-plane hollow silicon dioxide microneedle arrays were fabricated and investigated to determine their efficacy for transdermal applications. The fabrication process of the SiO2 microneedles is described, and mechanical fracture forces were investigated on microneedles with different geometrical dimensions. Biomechanical characterization of the microneedles was performed to specifically test for...
A MEMS based silicon CTD sensor for ocean environment is presented. The sensor components are a capacitive conductivity sensor (C), gold doped silicon temperature sensor (T), a multiple diaphragm piezoresistive pressure sensor (D). The sensor elements have further been packaged to protect them from harsh marine environment. This paper provides the design, fabrication and initial test results on a...
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