pH sensor using protein-mediated gold nanocrystal array

Amit Prakash, Anirban Das, Siddheswar Maikap*, Chao Sung Lai

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

pH sensitivity of protein mediated gold nanocrystals modified SiO 2 have been investigated using a capacitive EIS (electrolyte- insulator-semiconductor) structure and compared with bare SiO2. The SiO2 surface was first silanized using phenyltriethoxy and then a chaperonin protein array was formed on SiO2 surface. Finally, the chaperonin protein lattice is used to deposit gold nanocrystal on SiO 2 surface in the EIS structure. The electrochemical characterization of EIS sensors was done by means of C-V measurement in pH buffer solutions of values from 2 to 12. The average sensitivity of gold modified SiO2 senor was 33 mV/pH and SiO2 senor was 35 mV/pH while the linearity was 99.37% and 98.35%, respectively.

Original languageEnglish
Title of host publication2009 9th IEEE Conference on Nanotechnology, IEEE NANO 2009
Pages854-857
Number of pages4
StatePublished - 2009
Event2009 9th IEEE Conference on Nanotechnology, IEEE NANO 2009 - Genoa, Italy
Duration: 26 Jul 200930 Jul 2009

Publication series

Name2009 9th IEEE Conference on Nanotechnology, IEEE NANO 2009

Conference

Conference2009 9th IEEE Conference on Nanotechnology, IEEE NANO 2009
Country/TerritoryItaly
CityGenoa
Period26/07/0930/07/09

Keywords

  • Capacitive EIS (electrolyte-insulator-semiconductor) structure
  • Chaperonin protein
  • Gold nanocrystal
  • pH sensor

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