Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/223424

Title

Active control of silver nanoparticles spacing using dielectrophoresis for surface-enhanced Raman scattering

Author(s)

Chrimes, Adam F.;  Khoshmanesh, Khashayar;  Stoddart, Paul R.;  Kayani, Aminuddin A.;  Mitchell, Arnan;  Daima, Hemant;  Bansal, Vipul;  Kalantar-zadeh, Kourosh

Abstract

We demonstrate an active microfluidic platform that integrates dielectrophoresis for the control of silver nanoparticles spacing, as they flow in a liquid channel. By careful control of the nanoparticles spacing, we can effectively increase the surface-enhanced Raman scattering (SERS) signal intensity based on augmenting the number of SERS-active hot-spots, while avoiding irreversible aggregation of the particles. The system is benchmarked using dipicolinate (2,6-pyridinedicarboxylic acid) (DPA), which is a biomarker of Bacillus anthracis. The validity of the results is discussed using several complementing characterization scenarios.

Publication type

Journal article

Research centre

Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Centre for Atom Optics and Ultrafast Spectroscopy

Source

Analytical Chemistry, Vol. 84, no. 9 (May 2012), pp. 4029-4035

Publication year

2012

FOR Code(s)

0301 Analytical Chemistry;  0399 Other Chemical Sciences;  0904 Chemical Engineering

Keyword(s)

Dielectrophoresis;  Nanoparticles spacing;  Silver nanoparticles;  Surface-enhanced Raman scattering

Publisher

American Chemical Society

ISSN

0003-2700

Publisher URL

http://dx.doi.org/10.1021/ac203381n

Copyright

Copyright © 2012 American Chemical Society.

Research Projects

Analysing cell-cell communication mechanisms using microfluidic platforms, Australian Research Council grant number DE120101402

Peer reviewed