Influence of stress in ZnO thin films on its biosensing application

Enzyme and Microbial Technology
Shibu SahaVinay Gupta

Abstract

Highly c-axis oriented zinc oxide (ZnO) thin films deposited by radio frequency (RF) magnetron sputtering, under varying ambient atmosphere (oxygen and argon reactive gas mixture), were studied for biosensing application. The as-grown ZnO thin films were found to be under compressive stress. Glucose oxidase was chosen as model enzyme for studying biosensing response properties of the ZnO thin films. The present study reveals a good correlation between stress induced during thin film growth and its biosensing response characteristic. The bio-electrodes based on ZnO thin films which are under the influence of higher stress, show better sensitivity and higher enzyme loading along with a prolonged shelf life. The study highlights the importance of physical properties of thin film matrix on its biosensing application.

References

May 17, 2008·Analytica Chimica Acta·Raju KhanB D Malhotra
May 27, 2008·Biosensors & Bioelectronics·Soumya KrishnamoorthyGeorge P Chrousos
Jul 10, 2012·Analytica Chimica Acta·Sunil K AryaSurinder P Singh

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