School Colloquia Series - Natalie Plank - Carbon Nanotube Device Platforms for Electronic Aptasensors
Carbon nanotube device platforms for electronic aptasensors
The MacDiarmid Institute for Advanced Materials and Nanotechnology, School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington 6021, New Zealand
Carbon nanotube (CNT) network films offer a highly attractive semiconducting platform for field effect transistors (FETs). By attaching DNA aptamer receptors to the CNT sidewalls it is possible to fabricate selective and sensitive electronic sensors1,2 on flexible plastic substrates that can operate in liquids. In this presentation I will introduce aptamers, discuss how our aptasensors work, and show our recent result on the CNT aptasensors for both potassium ions1 and estrogen2 that demonstrate aptamer-induced electrostatic gating of electronic conduction. These results, along with the implications for the development electronic biosensors using the growing library of aptamer receptors for portable health diagnostics, will be presented.
1. H.Y. Zheng, O.A. Alsager, B. Zhu, J. Travas-Sejdic, J.M. Hodgkiss, and N.O.V. Plank Nanoscale, 2016, 8(28), 13659–13668.
2. H.Y. Zheng, O.A. Alsager, C. S. Wood, J.M. Hodgkiss, and N.O.V. Plank Journal of Vacuum Science and Technology B. 2016, 33, 06F904.
Dr Natalie Plank is Senior Lecturer in Physics in the School of Chemical and Physical Sciences at Victoria University of Wellington and is a Principal Investigator of the MacDiarmid Institute for Advanced Materials and Nanotechnology. Her research interests are in the area of nanomaterial device platforms for sensing technology.