Electrodeposition method for preparing SERS- and LSPR-active platforms

Marta Siek 1Agnieszka Kamińska 1Marcin Łoś 2Joanna Niedziolka-Jonsson 1

1. Institute of Physical Chemistry Polish Academy of Sciences (IPCPAS), Kasprzaka 44/52, Warsaw 01-224, Poland
2. University of Gdansk, Dept. of Molecular Biology (KBM-UG), Kladki 24, Gdańsk 80-822, Poland

    Novel biosensing methods, including Surface Enhanced Raman Spectroscopy (SERS) and Localized Surface Plasmon Resonance (LSPR), involves using of noble metal nanoparticles. The signal detected depends on nanoparticles size and shape, interparticle distance and refractive index of surrounding media.[1] Many attempts have been made to produce cheap, efficient and reproducible substrates.[2-6]

    We present a universal biosensing platform for virus or antibody label-free recognition. It was produced using electrodeposition of silver nanoparticles onto tin-doped indium oxide (ITO) by cyclic voltammetry. Our method is consistent with the principles of green chemistry. Morphology of substrates was changed with tuning the scan rate of the applied potential and the number of scans. The platform is suitable both for surface enhanced Raman spectroscopy (SERS) and localized surface plasmon resonance (LSPR). The obtained substrates are reproducible and stable. Efficacy of our AgNPs substrate for biosensing was demonstrated for the detection of neurotransmitters such as choline at low concentration and with short detection time at SERS and for detection of specific binding between avidine and biotinylated bacteriophages at both SERS and LSPR.

[1] B. Sepúlveda, P.C. Angelomé, L.M. Lechuga, L.M. Liz-Marzán, LSPR-based nanobiosensors, Nano Today, 4 (2009) 244-251.
[2] M.E. Stewart, C.R. Anderton, L.B. Thompson, J. Maria, S.K. Gray, J.A. Rogers, R.G. Nuzzo, Nanostructured Plasmonic Sensors, Chemical Reviews, 108 (2008) 494-521.
[3] K.M. Mayer, J.H. Hafner, Localized Surface Plasmon Resonance Sensors, Chemical Reviews, 111 (2011) 3828-3857.
[4] A. Abbas, M.J. Linman, Q. Cheng, New trends in instrumental design for surface plasmon resonance-based biosensors, Biosensors and Bioelectronics, 26 (2011) 1815-1824.
[5] X. Hou, Y. Fang, Investigation of p-hydroxybenzoic acid from a new surface-enhanced Raman scattering system, Journal of Colloid and Interface Science, 316 (2007) 19-24.
[6] Y. Hu, Y. Song, Y. Wang, J. Di, Electrochemical synthesis of gold nanoparticles onto indium tin oxide glass and application in biosensors, Thin Solid Films, 519 (2011) 6605-6609.

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Presentation: Short communication at SMCBS'2011 International Workshop, by Marta Siek
See On-line Journal of SMCBS'2011 International Workshop

Submitted: 2011-09-05 11:51
Revised:   2011-10-21 14:58
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