Rakefet Ofek Almog - Video Lecture

Rakefet Ofek Almog - Video Lecture

IVS-IPSTA 2020 Online Conference December 13, 2020

Materials Assembly & Sensors Session
Session chair:
Amit Sitt

Tel Aviv University

Decorating ZnO Nanowalls with AuNP for Bio-Sensing Applications

Rakefet Ofek Almog

Department of Materials Engineering, Azrieli College of Engineering, Israel


Biosensors based on functionalized metal oxide nanostructures, such as zinc oxide (ZnO), have been demonstrated using electrochemical methods. Those nanostructures can be deposited on both rigid and flexible substrates at low temperature using rather simple and low-cost processes. Recently, it was discovered that decorating the metal oxide nanostructures with noble metal nanoparticles opens the doors to fabricating biosensors to detect volatile organic compounds.

The aim of this work is develop highly sensitive and selective biosensors using relatively simple and low cost materials and processing. The sensors will use recent advances in functionalized Gold NP decorated ZnO electrodes based sensors using electrochemical impedance spectroscopy (EIS).
A Scanning Electron Microscopy study of the nucleation and growth of the ZnO nanowalls, and of the NP decoration was conducted. Different conditions such as growth temperature and time were used, both on rigid (Silicon/ SiO2) substrate and on flexible (Polyimide) substrates.

After mastering the best methods for ZnO nanowalls growth and decoration with Au NP, decoration with different NP such as Platinum or Palladium will be compared. This construct will be tested for Ethylene sensors.