A novel glucose biosensor platform based on Ag@AuNPs modified graphene oxide nanocomposite and SERS application

Gupta V. K., Atar N., Yola M. L., Eryılmaz M., Torul H., Tamer U., ...More

JOURNAL OF COLLOID AND INTERFACE SCIENCE, vol.406, pp.231-237, 2013 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 406
  • Publication Date: 2013
  • Doi Number: 10.1016/j.jcis.2013.06.007
  • Journal Name: JOURNAL OF COLLOID AND INTERFACE SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.231-237
  • Keywords: Graphene oxide, Ag@AuNPs, Characterization, Glucose biosensor, SERS, ENHANCED RAMAN-SCATTERING, GOLD NANOPARTICLES, PVC MATRIX, POTENTIOMETRIC SENSOR, OPTICAL-PROPERTIES, ELECTRODE, ACID, SPECTROSCOPY, MEMBRANE, FABRICATION
  • Gazi University Affiliated: Yes

Abstract

This study represents a novel template demonstration of a glucose biosensor based on mercaptophenyl boronic acid (MBA) terminated Ag@AuNPs/graphene oxide (Ag@AuNPs-GO) nanomaterials. The nanocomposites were characterized by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD) method. The TEM image shows that Ag@AuNPs in the nanocomposite is in the range of diameters of 10-20 nm. The nanocomposite was used for the determination of glucose through the complexation between boronic acid and diol groups of glucose. Thus, a novel glucose biosensor was further fabricated by immobilizing glucose oxidase (GOD) into MBA terminated Ag@AuNPs-GO nanocomposite film (MBA-Ag@AuNPs-GO). The linearity range of glucose was obtained as 2-6 mM with detection limit of 0.33 mM. The developed biosensor was also applied successfully for the determination of glucose in blood samples. The concentration value of glucose in blood samples was calculated to be 1.97 +/- 0.002 mM from measurements repeated for six times. (C) 2013 Elsevier Inc. All rights reserved.