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Southern Illinois University Carbondale

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2015

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Low Temperature Electrochemical Deposition Of Highly Active Elements, Daniel Falola, Ian Suni Apr 2015

Low Temperature Electrochemical Deposition Of Highly Active Elements, Daniel Falola, Ian Suni

Articles

Electrochemical methods are attractive for thin film deposition due to their simplicity, conformal and high rate deposition, the ability to easily make multilayers of different composition, ease of scale-up to large surface areas, and applicability to wide variety of different shapes and surface geometries. However, many elements from periodic table of commercial importance are too active to be electrodeposited from aqueous solution. Recent advances are briefly reviewed for room temperature methods for electrochemical deposition, including electrodeposition from ionic liquids, electrodeposition from organic solvents, combined electrodeposition and precipitation on liquid metal cathodes, and galvanic deposition. Recent studies of electrodeposition from ionic …


Impedance Biosensor Utilizing A Si Substrate Deposited By Wet Methods, Daniel Falola, Rajeswaran Radhakrishnan, Ian Suni Jan 2015

Impedance Biosensor Utilizing A Si Substrate Deposited By Wet Methods, Daniel Falola, Rajeswaran Radhakrishnan, Ian Suni

Articles

We report an impedance biosensor utilizing a Si electrode created by wet chemical deposition atop 6061 Al alloy. The sensor electrode is created by galvanic/electroless Si deposition from an electrolyte containing 10 mM HF and 20 mM Na2SiF6 in 80 wt% formic acid, followed by antibody immobilization. The impedance response of the sensor electrode to increasing concentrations of peanut protein Ara h 1, a common food allergen, can be fit to an equivalent circuit containing three RC loops. The circuit element most sensitive to antigen binding is the charge transfer resistance, yielding a detection limit of 4 …