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Robust ZnO nanoparticle embedded memory device using vancomycin conjugate and its biorecognition for electrical

Minkeun Kim1, Hye-Jin Lee2, Sewook Oh1

  • 1Department of Chemical Engineering, Myongji University, Yongin 449-728, Republic of Korea.

Biosensors & Bioelectronics
|January 28, 2014
PubMed
Summary

This study demonstrates a novel bioelectronic device using vancomycin-conjugated zinc oxide nanoparticles for charge storage. This advancement paves the way for biomolecular electronics by interfacing biomolecules with electronic devices.

Keywords:
BioelectronicsBiorecognitionMemory deviceSelf-assembly monolayerVancomycinZnO nanoparticles

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Area of Science:

  • Nanobiotechnology
  • Biomolecular Electronics
  • Materials Science

Background:

  • Antibiotic conjugation on nanoparticles is a growing area in nanobiotechnology.
  • Vancomycin-resistant bacteria pose a significant challenge, necessitating novel detection and treatment strategies.

Purpose of the Study:

  • To develop a bioelectronic structure utilizing vancomycin-conjugated zinc oxide nanoparticles on a metal-pentacene-insulator-silicon device.
  • To employ molecular recognition for self-assembled monolayers of nanoparticles.
  • To demonstrate charge storage capabilities for potential applications in biosensing.

Main Methods:

  • Conjugation of vancomycin (VAN) onto zinc oxide (ZnO) nanoparticles (NPs).
  • Fabrication of a metal-pentacene-insulator-silicon (MPIS) device.
  • Modification of the insulator surface with a VAN cognate peptide (L-Ala-D-Glu-L-Lys-D-Ala-D-Ala).
  • Formation of self-assembly monolayers (SAMs) of VAN-conjugated ZnO NPs via molecular recognition.
  • Analysis of capacitance-voltage (C-V) curves to observe hysteretic behavior and flatband voltage shifts.

Main Results:

  • Successful conjugation of vancomycin on zinc oxide nanoparticles.
  • Demonstration of self-assembled monolayers of nanoparticles on a modified insulator surface.
  • Observation of hysteretic behavior in C-V curves, indicating charge storage on the VAN-conjugated ZnO NPs.
  • Evidence of flatband voltage shifts, confirming the charge storage mechanism.

Conclusions:

  • The study successfully demonstrates a novel bioelectronic structure using vancomycin-conjugated zinc oxide nanoparticles for charge storage.
  • The findings highlight the potential of specific molecular recognition for creating self-assembled monolayers in electronic devices.
  • This work represents a tangible step towards advancing biomolecular electronics through the integration of biomolecules and electronic components.