ZnO nanostructure-modified QCM for dynamic monitoring of cell adhesion and proliferation

Pavel Ivanoff Reyes, Ziqing Duan, Yicheng Lu, Dmitry Khavulya, Nada Boustany

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

Noninvasive examination of live cell function in real-time is essential in advancing the understanding of the dynamic progression of cell's biological processes. We present a dynamic and noninvasive method of monitoring the adhesion and proliferation of bovine aortic endothelial cells (BAEC) using a ZnO nanostructure-modified quartz crystal microbalance (ZnOnano-QCM) biosensor. The ZnOnano-QCM biosensor consists of a conventional QCM with ZnO nanostructures directly grown on its sensing electrode deployed in-situ of a standard cell culture environment. Cell adhesion to the ZnO surfaces with various morphologies is studied and the optimal morphology is chosen for the BAEC adhesion. The ZnOnano-QCM biosensor displays enhanced sensitivity compared to the standard QCM sensor with ~10 times higher frequency shift and motional inductance, and ~4 times higher measured motional resistance at full confluency. The dynamic motional resistance and inductance relating to the cells' viscoelastic properties during growth are extracted from the measured time-evolving acoustic spectra. The Butterworth-Van-Dyck (BVD) model is adapted for the ZnOnano-QCM biosensor system and is used to correlate the measured time-evolving acoustic spectra with the motional characteristics of cell attachment and proliferation.

Original languageEnglish (US)
Pages (from-to)84-89
Number of pages6
JournalBiosensors and Bioelectronics
Volume41
Issue number1
DOIs
StatePublished - Mar 15 2013

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Biophysics
  • Biomedical Engineering
  • Electrochemistry

Keywords

  • Cell monitoring
  • Quartz crystal microbalance
  • Zinc oxide nanostructure

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