Description: Multi-parameter sensing using high-k oxide of barium strontium titanate

This title appears in the Scientific Report : 2015

Multi-parameter sensing using high-k oxide of barium strontium titanate

High-k perovskite oxide of barium strontium titanate (BST) represents a very attractive multi-functional transducer material for the development of (bio-)chemical sensors. In this work, a Si-based sensor chip containing Pt interdigitated electrodes covered with a thin BST layer (485 nm) has been dev...

Personal Name(s):	Huck, Christina
	Poghossian, Arshak (Corresponding author) / Bäcker, Matthias / Reisert, Steffen / Kramer, Friederike / Begoyan, Vardges K. / Buniatyan, Vahe V. / Schöning, Michael J. (Corresponding author)
Contributing Institute:	Bioelektronik; PGI-8
Published in:	Physica status solidi / A, 212 (2015) 6, S. 1254 - 1259
Imprint:	2015
DOI:	10.1002/pssa.201431911
Document Type:	Journal Article
Research Program:	Controlling Configuration-Based Phenomena
	Publikationsportal JuSER

Please use the identifier: http://dx.doi.org/10.1002/pssa.201431911 in citations.

High-k perovskite oxide of barium strontium titanate (BST) represents a very attractive multi-functional transducer material for the development of (bio-)chemical sensors. In this work, a Si-based sensor chip containing Pt interdigitated electrodes covered with a thin BST layer (485 nm) has been developed for multi-parameter chemical sensing. The chip has been applied for the contactless measurement of the electrolyte conductivity, the detection of adsorbed charged macromolecules (positively charged polyelectrolytes of polyethylenimine) and the concentration of hydrogen peroxide (H2O2) vapor. The experimental results of functional testing of individual sensors are presented. The mechanism of the BST sensitivity to charged polyelectrolytes and H2O2 vapor has been proposed and discussed.