Towards the development of electrical biosensors based on nanostructured porous silicon

Gonzalo Recio-Sánchez, Vicente Torres-Costa, Miguel Manso, Darío Gallach, Juan López-García, Raúl J. Martín-Palma*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

The typical large specific surface area and high reactivity of nanostructured porous silicon (nanoPS) make this material very suitable for the development of sensors. Moreover, its biocompatibility and biodegradability opens the way to the development of biosensors. As such, in this work the use of nanoPS in the field of electrical biosensing is explored. More specifically, nanoPS-based devices with Al/nanoPS/Al and Au-NiCr/nanoPS/Au-NiCr structures were fabricated for the electrical detection of glucose and Escherichia Coli bacteria at different concentrations. The experimental results show that the current-voltage characteristics of these symmetric metal/nanoPS/metal structures strongly depend on the presence/absence and concentration of species immobilized on the surface.

Original languageEnglish
Pages (from-to)755-763
Number of pages9
JournalMaterials
Volume3
Issue number2
DOIs
Publication statusPublished - 2010
Externally publishedYes

Keywords

  • Biosensing
  • Escherichia coli
  • Glucose
  • Porous silicon

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