Nanomaterial field effect transistor biosensors




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Dr Natalie Plank, School of Chemical and Physical Sciences, VUW


Semiconducting nanomaterials, such as carbon nanotubes and ZnO nanowires, are promising active elements of electronic biosensors.1Not only do they show high sensitivity to environmental changes, such materials can be printed onto plastic substrates.   One challenge for these devices is to achieve selectivity as well as sensitivity.  By functionalizing carbon nanotubes with aptamers – short oligonucleotides whose sequences are optimized to bind strongly to specific analytes, we are able to fabricate selective biosensors.


Here I will discuss work done in our group at VUW to fabricate nanomaterial biosensors from networks of carbon nanotubes and arrays of ZnO nanowires.  I will discuss the device fabrication, nanowire synthesis and electronic properties,2and the subsequent operation of the biosensors in a liquid environment.  We have demonstrated hormone detection on a device built on plastic using aptamers as the detection element.

1.     Allen, B. L., Kichambare, P. D. & Star, a. Carbon Nanotube Field-Effect-Transistor-Based Biosensors. Adv. Mater. 19, 1439–1451 (2007).

2.     Burke-Govey, C. P. & Plank, N. O. V. Review of hydrothermal ZnO nanowires: Toward FET applications. J. Vac. Sci. Technol. B Microelectron. Nanom. Struct. 31, 06F101 (2013).


Victoria University of Wellington, RB901
University of Otago, please use Scopia Desktop
University of Auckland, Chemistry, Room 301 411

Massey University, please use Scopia Desktop
Callaghan Innovation – Gracefield Campus, C-Block Meeting Room
University of Canterbury – Psychology 164

If you are unable to attend at one of the above locations the seminar can be viewed via Scopia Desktop