Localized surface plasmon resonance-based hybrid Au-Ag nanoparticles for detection of Staphylococcus aureus enterotoxin B

Zhu, Shaoli, Du, Chunlei and Fu, Yongqi (2009) Localized surface plasmon resonance-based hybrid Au-Ag nanoparticles for detection of Staphylococcus aureus enterotoxin B. Optical Materials, 31 11: 1608-1613. doi:10.1016/j.optmat.2009.03.009

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Author Zhu, Shaoli
Du, Chunlei
Fu, Yongqi
Title Localized surface plasmon resonance-based hybrid Au-Ag nanoparticles for detection of Staphylococcus aureus enterotoxin B
Journal name Optical Materials   Check publisher's open access policy
ISSN 0925-3467
1873-1252
Publication date 2009-09
Sub-type Article (original research)
DOI 10.1016/j.optmat.2009.03.009
Open Access Status File (Author Post-print)
Volume 31
Issue 11
Start page 1608
End page 1613
Total pages 6
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Language eng
Abstract A triangular hybrid Au-Ag nanoparticles array was proposed for the purpose of biosensing in this paper. Constructing the hybrid nanoparticles, an Au thin film is capped on the Ag nanoparticles which are attached on glass substrate. The hybrid nanoparticles array was designed by means of finite-difference and time-domain (FDTD) algorithm-based computational numerical calculation and optimization. Sensitivity of refractive index of the hybrid nanoparticles array was obtained by the computational calculation and experimental detection. Moreover, the hybrid nanoparticles array can prevent oxidation of the pure Ag nanoparticles from atmosphere environment because the Au protective layer was deposited on top of the Ag nanoparticles so as to isolate the Ag particles from the atmosphere. We presented a novel surface covalent link method between the localized surface plasmon resonance (LSPR) effect-based biosensors with hybrid nanoparticles array and the detected target molecules. The generated surface plasmon wave from the array carries the biological interaction message into the corresponding spectra. Staphylococcus aureus enterotoxin B (SEB), a small protein toxin was directly detected at nanogramme per milliliter level using the triangular hybrid Au-Ag nanoparticles. Hence one more option for the SEB detection is provided by this way. © 2009 Elsevier B.V. All rights reserved.
Keyword Hybrid Au–Ag nanoparticles
Nano-biosensor
LSPR
Spectroscopy
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Article (original research)
Collection: Australian Institute for Bioengineering and Nanotechnology Publications
 
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Citation counts: TR Web of Science Citation Count  Cited 31 times in Thomson Reuters Web of Science Article | Citations
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Created: Fri, 11 Mar 2011, 13:27:25 EST by Dr Shaoli Zhu on behalf of Aust Institute for Bioengineering & Nanotechnology