Modeling and comparative analysis of carbon nanotube and boron nitride nanotube cantilever biosensors

Islam, Md. Saiful, Kouzani, Abbas Z., Dai, Xiujuan J. and Michalski, Wojtek P. 2011, Modeling and comparative analysis of carbon nanotube and boron nitride nanotube cantilever biosensors, Advanced materials research, vol. 159, pp. 650-655.

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Title Modeling and comparative analysis of carbon nanotube and boron nitride nanotube cantilever biosensors
Author(s) Islam, Md. Saiful
Kouzani, Abbas Z.
Dai, Xiujuan J.
Michalski, Wojtek P.
Journal name Advanced materials research
Volume number 159
Start page 650
End page 655
Total pages 6
Publisher Trans Tech Publications
Place of publication Stafa-Zurich, Switzerland
Publication date 2011
ISSN 1022-6680
Keyword(s) biosensor
cantilever
affinity
electrostatics
electroquasistatics
Summary This paper investigates the bending deformation of a cantilever biosensor based on a single-walled carbon nanotube (CNT) and single-walled boron nitride nanotube (BNNT) due to bioparticle detection. Through 3-D modeling and simulations, the performance of the CNT and BNNT cantilever biosensors is analyzed. It is found that the BNNT cantilever has better response and sensitivity compared to the CNT counterpart. Additionally, an algorithm for an electrostatic-mechanical coupled system is developed. The cantilever (both BNNT and CNT) is modelled by accounting that a conductive polymer is deposited onto the nanotube surfaces. Two main approaches are considered for the mechanical deformation of the nanotube beam. The first one is differential surface stress produced by the binding of biomolecules onto the surface. The second one is the charge released from the biomolecular interaction. Also, different ambient conditions are considered in the study of sensitivity. Sodium Dodisyl Sulphate (SDS) provides better bending deformation than the air medium. Other parameters including length of beam, variation of beam's location, and chiralities are considered in the design. The results are in excellent agreement with the electrostatic equations that govern the deformation of cantilever.
Language eng
Field of Research 091306 Microelectromechanical Systems (MEMS)
Socio Economic Objective 861502 Medical Instruments
HERDC Research category C1 Refereed article in a scholarly journal
HERDC collection year 2011
Copyright notice ©2011, Trans Tech Publications
Persistent URL http://hdl.handle.net/10536/DRO/DU:30040501

Document type: Journal Article
Collections: Centre for Material and Fibre Innovation
School of Engineering
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