High-sensitivity non-enzymatic glucose biosensor based on Cu(OH) 2 nanoflower electrode covered with boron-doped nanocrystalline diamond layer

Huijun Sim, Jong Hoon Kim, Seung Koo Lee, Min Jung Song, Dong Hwa Yoon, Dae-Soon Lim, Suk In Hong

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19 Citations (Scopus)

Abstract

A non-enzymatic biosensor was developed using boron-doped nanocrystalline diamond (BDND) based on a Cu electrode with Cu(OH) 2 dendritic architecture. The Cu(OH) 2 nanoflower electrode was covered with a BDND layer using an electrostatic self-assembly seeding method with nanodiamond particles and hot-filament chemical vapor deposition. X-ray diffraction and Raman spectral analysis confirmed that the BDND nanoflower electrode was synthesized onto Cu(OH) 2 nanoflowers. Field-emission scanning electron microscope images showed that the fabricated electrodes were nanoflowers possessing large surface areas. From cyclic voltammetry, the peak currents of an BDND/Cu(OH) 2/Cu electrode was about 7, 6.2, and 5.9 times higher than that of the Cu foil, Cu(OH) 2/Cu, and BDND/Cu electrodes, respectively. A biosensor based on BDND/Cu(OH) 2/Cu exhibited excellent performance for glucose detection, and it had a linear detection range of 0 to 6 mM, a correlation coefficient of 0.9994, a low detection limit of 9 μM, and a high sensitivity of 2.1592 mA mM - 1 cm - 1.

Original languageEnglish
Pages (from-to)7219-7223
Number of pages5
JournalThin Solid Films
Volume520
Issue number24
DOIs
Publication statusPublished - 2012 Oct 1

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Keywords

  • Amperometric glucose sensor
  • Boron-doped diamond
  • Chemical vapor deposition
  • Copper hydroxide
  • Crystallization from solution
  • Nanocrystalline diamond
  • Nanostructures

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Metals and Alloys
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

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