Vol. 21 No. 4 (2011)
Papers

Synthesis of Gold Nanoparticles Conjugated with Protein A: Towards the Application in Biosensors for Virus Detection

Tran Quang Huy
Researcher, Lab. of Electron Microscopy - Dept. of Virology National Institute of Hygiene and Epidemiology (NIHE)

Published 30-12-2011

Keywords

  • Gold nanoparticle,
  • protein A,
  • biosensor,
  • immunosensor,
  • virus detection

How to Cite

Huy, T. Q., & Tuan, M. A. (2011). Synthesis of Gold Nanoparticles Conjugated with Protein A: Towards the Application in Biosensors for Virus Detection. Communications in Physics, 21(4), 333. https://doi.org/10.15625/0868-3166/21/4/359

Abstract

In this article, a facile and effective technique is described to prepare a complex of gold nanoparticles (GNPs)/protein A (PrA) for biosensors in virus detection. GNPs were synthesized by the reduction of tetrachloroauric (III) acid trihydrate using sodium ascorbate, and then coated with PrA via ultracentrifugation. The complex of GNPs/PrA was characterized using UV-vis spectroscopy and transmission electron microscopy. The immunogold labeling method of scanning electron microscopy was also used to verify the capacity for the detection and binding of GNPs/PrA to H$_{1}$N$_{1}$ influenza A virus particles. The results showed that GNPs were spherical, uniform shape, and approximately 10 nm in size. Noticeably, the complex of GNPs/PrA could detect and bind effectively to H$_{1}$N$_{1}$ influenza A virus particles by a large number of GNPs surrounded. The advantage of the complex of GNPs/PrA showed a highly potential application in biosensors with the improvement of the sensitivity and transducing signal for virus detection.

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