*Seminar Series: 2017 Bertram Dillon Steele Lecture
*Location: Hawken 50-N202
*Date: 19/09/2017
*Time: 12:00

Speaker #1 details
*Title of talk: Making Silicon Water Friendly for Biomaterials, Bioelectrochemstry and Molecular Electronic Applications
*Speaker's name: Professor J. Justin Gooding
*Speaker's organisation: University of New South Wales
Speaker's city/state/country: NSW
Talk Abstract: The compatibility of silicon with microfabrication makes it an ideal material for biophotonics, bioelectrochemistry and many other purposes. However, for many applications involving aqueous solution, the oxidation of the silicon surface limits the use of this material and alternatives must be found. Self-assembled monolayer (SAM) modification of hydrogen-terminated silicon via hydrosilylation of alkenes is one strategy to make silicon devices water friendly. This presentation focus on the modification of flat and porous silicon surface via both hydrosilylation of alkenes and alkynes for biophotonic, bioelectrochemical and biomaterials applications. Initially the modification, protection of silicon from oxidation and the charaxcterisation of the organic monolayers will be discussed. An important part of this characterisation will focus on using electron transfer measurements to ensure high quality monolayers. Subsequently, the application of flat and porous silicon (PSi) photonic crystals for the capture of mammalian cells followed by monitoring of the release of proteins from these cells will discussed. Then, the synthesis of and applications of silicon quantum dots will be presented. Finally, the modification of flat silicon for applications in electrochemistry using a passivating self-assembled monolayer derived from an alkene will be reported. The electrochemistry of these silicon electrodes are 'switched on' by the attachment of gold nanoparticles to the distal end of the SAM. This nanoparticle-SAM modified silicon surfaces provides a unique strategy for fabricating nanoelectrode arrays where electrochemistry and antifouling properties can be conferred on the same electrode. The modification of silicon electrodes with dialkynes followed by the subsequent modification with redox active species using click chemistry will balso be presented. Electrodes fabricated are shown to be highly stable and resistant to oxidation. The application of these electrodes to producing electrochemically switchable surfaces are demonstrated.
Speaker's bio: Scientia Professor J. Justin Gooding, FAA, FISE, FRACI, FRSC, FRSN is currently an ARC Australian Laureate Fellow, the co-director of the Australian Centre for NanoMedicine and the co-director of the New South Wales Smart Sensing Network. He is also editor-in-chief of the journal ACS Sensors. He graduated with a B.Sc. (Hons) from Melbourne University before obtaining a D.Phil. from the University of Oxford and received post-doctoral training at the Institute of Biotechnology in Cambridge University. He returned to Australia in 1997 as a Vice-Chancellor's Post-Doctoral Research Fellow at the University of New South Wales (UNSW). He was promoted to full professor in 2006. He was one of the recipients of a 2004 NSW Young Tall Poppy award, a 2005 Alexander von Humboldt Fellowship, the 2007 RACI Lloyd Smythe Medal for Analytical Chemistry, the 2009 Eureka Prize for Scientific Research, a 2010 ARC Australian Professorial Fellow, the RACI 2011 H.G. Smith Medal for contributions to chemistry, the 2012 RACI R.H. Stokes Medal for electrochemical research, the 2012 Royal Society of Chemistry Australasian Lecturer, the 2013 NSW Science and Engineering Award for Emerging Research, the 2016 Faraday Medal of the Royal Society of Chemistry Electrochemistry Division, the 2016 Biosensors and Bioelectronics Award and the 2016 Walter Burfitt Prize for Science and Archibald Liversidge Medal for Chemistry both of the Royal Society of New South Wales. He leads a research team of 40 researchers interested in surface modification and nanotechnology for biosensors, biomaterials, electron transfer and medical applications.

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Other Details:
*Host name: Elizabeth Krenske
Host phone number:
*Host email: e.krenske@uq.edu.au