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TU Dresden » Faculty of Mechanical Science and Engineering » Institute for Materials Science » Chair of Materials Science and Nanotechnology

Thursday, 14 October 2010
(at 13:00 in room 115, Hallwachsstr. 3)
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Silicon nanowire based sensors for life-science applications

Steffen Strehle

Dept. of Chemistry and Chemical Biology, Lieber Group
Harvard University

Ultrasensitive label-free detection and quantification of chemical and biological species are crucial to many areas of the life sciences and medicine. Applications are ranging from disease detection and screening of drug molecules to discovery and study of fundamental cellular processes. Silicon semiconductor nanowires configured as field effect transistors have become a general platform for the direct electrical detection of chemical and biological species. The sensor performance can be influence by the doping level and nanowire surface modifications needed to create sensing selectivity. The talk is giving an insight into basic aspects and examples of nanowire sensor systems as well as a brief introduction to the device fabrication based on silicon nanowires grown by the vapor-liquid-solid (VLS) method. The detection of the neurotransmitter dopamine in phosphate buffered saline solution using TiO2 modified nanowires serves as an example to elucidate silicon nanowire sensing in detail.

Brief Bio:

study of Physical Engineering and Materials Science at the University of Applied Science Zwickau and TU Dresden, respectively; PhD in materials science in 2007 from TU Dresden: study of reliability improvement of copper interconnects in microelectronics in cooperation with the Institute for Solid State and Materials Research Dresden; joined in 2006 the Institute for Semiconductor and Microsystems Technology at TU Dresden: study of initial film growth during atomic layer deposition; since 2010 Harvard University (Lieber Group): synthesis and application of semiconducting nanowires; research interests: functional nanosystems for sensing and energy harvesting

slides (pdf)

Invited by G. Cuniberti

Within the nanoSeminar

last modified: 2021.10.21 Thu
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