Dresden 2017 – scientific programme

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DS: Fachverband Dünne Schichten

DS 39: Thin Film Applications

DS 39.4: Talk

Thursday, March 23, 2017, 10:15–10:30, CHE 91

Sensor applications of indium tin oxide nano-columns formed by glancing angle deposition — •Kenneth Harris^1,2, Abebaw Jemere¹, Donghai Lin¹, Nora Chan³, Véronique Balland⁴, and Benoît Limoges⁴ — ¹National Research Council Canada, National Institute for Nanotechnology, Edmonton, Canada — ²Leibniz Institute of Polymer Research, Dresden, Germany — ³Defense Research and Development Canada, Suffield, Canada — ⁴Université Paris Diderot 7, Molecular Electrochemistry Laboratory, Paris, France

The glancing angle deposition (GLAD) technique can be used to fabricate nano-columnar structures with precisely-controlled shapes (including cylinders, helices, zig-zags and others) and in a wide variety of materials (including metals, oxides, ceramics and small-molecule organics). In this presentation, I will describe glancing angle deposition of the transparent conductor indium tin oxide (ITO), discussing deposition conditions and post-treatments to control electrical conductivity and transparency to visible light. Sensing applications of these GLAD-ITO structures will then be presented. Due to their large and accessible surface area, GLAD-formed structures can adsorb (or interact with) large quantities of analytes. With ITO-based sensors, both light transparency and electrical conductivity are also built into the materials system, allowing electrical and optical phenomena to be actively monitored during exposure to analytes of interest. Data from two representative GLAD-ITO sensing platforms will be presented: sensors for detection of bacterial surface proteins, and spectro-electrochemistry electrodes to observe the evolution of chemical redox reactions.