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MM: Fachverband Metall- und Materialphysik

MM 17: Functional Materials I

MM 17.3: Talk

Monday, March 20, 2017, 16:15–16:30, IFW D

Compact Nanowire Sensors Probe Microdroplets — Julian Schütt¹, Bergoi Ibarlucea^1,2, Rico Illing^1,2, Felix Zoergiebel^1,2, Sebastian Pregl^1,2, Daijiro Nozaki¹, Walter Weber^2,3, Thomas Mikolajick^2,3, Larysa Baraban^1,2, and •Gianaurelio Cuniberti^1,2 — ¹Max Bergmann Center of Biomaterials and Institute for Materials Science, Dresden — ²Center for Advancing Electronics Dresden — ³Namlab GmbH, Dresden

Here we demonstrate a first combination of droplets microfluidics with the compact silicon nanowire field effect transistor (SiNW FET) in the microfluidic channel for in flow electrical detection of aqueous reactor-drops. Apart from detection events, we chemically probe the content of numerous droplets in a row as independent events (up to 10⁴), and resolve the pH values and ionic strength of the solution, resulted in a change of a source-drain current ISD through the nanowires. We demonstrate the capability of the novel droplets based nanowire platform for bioassay applications and carry out a glucose oxidase (GOx) enzymatic test for glucose detection. Optic-less and noninvasive measurements of these parameters in aqueous droplets have a great impact on the area of biodetection and bioanalytics as a HTS tool for pathogens, drug assays, and evaluation of the enzymatic activities.