Project A5

Piezotronic Magnetoelectric Sensors

Project A5 employs piezotronics for improving the ME sensors. Preliminary work shows the suitability of various ME sensor types for the piezotronic concept, including ZnO, AlN, and PZT. The well-known piezotronic material from literature, ZnO, will be utilized to investigate the effect of morphology, doping, defects, crystal quality, interfaces, as well as the local stress distribution behavior. Using FFT impedance spectroscopy, will help with understanding the details of the electrical and electronic properties in the Schottky and ohmic contacts. Besides fundamental understanding of piezotronics for ME sensors, an increase in the limit of detection (LoD) by three orders of magnitude is expected as indicated by preliminary work..

 

Rainer Adelung
Prof. Dr.
Lead of projects A2, A5
Jorit Gröttrup
M.Sc.
Doctoral researcher
Mona Mintken
M.Sc.
Doctoral researcher
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Role within the Collaborative Research Centre

In principle, the piezotronic approach is transferable to many different sensor types. This potential will be elucidated with the other groups listed below. Due to the difference in noise sources and sensor layout, further modeling and characterization in conjunction with other groups is required. Especially the ZnO model system makes a detailed understanding of the role of defects and stress distribution on the piezotronic features possible and will be explored in operando in TEM and synchrotron x-ray experiments to gain fundamental understanding of underlying principles. The impedance spectroscopy will be provided as a service to all projects that need a specification of dielectric films.

This project is part of the focus groups F1 “Modeling” and F2 “Sensor Concepts”.

A3: The result of the piezotronic investigations using AlN and PZT will be used as feedback to improve the piezotronic effect in different devices.
A4: Adoption of the piezotronic approach to a ΔE readout.
A6: The characterization of the in situ micro-structural changes will be performed in close collaboration with TEM and synchrotron x-ray experiments. Push-to-pull devices will be customized to enable the measurement of strained piezoelectric materials in TEM and synchrotron x-ray analyses.
A8: Exchange of finite element method calculations of mechanical deformations.
B1: Exchange of modeling of noise behavior of the piezotronic sensor systems and associated electronics.
B7: Supplying various ZnO networks as templates for cell experiments.
Z1: MEMS AlN layers for piezotronic based sensors.
Z2: High-quality, low-noise sensor measurements.

Project-related Publications

S. B. Hrkac, C. T. Koops, M. Abes, C. Krywka, M. Müller, M. Burghammer, M. Sztucki, T. Dane, Kaps, Y. K. Mishra,R. Adelung, J. Schmalz, M. Gerken, E. Lage, C. Kirchhof, E. Quandt, O. M. Magnussen, and B. M. Murphy: Tunable Strain in Magnetoelectric ZnO Microrod Composite Interfaces; ACS Appl. Mater. Interfaces, 2017, 9 (30), pp 25571–25577; DOI: 10.1021/acsami.6b15598

S. Kaps, S. Bhowmick, J. Gröttrup, V. Hrkac, D. Stauffer, H. Guo, O. L. Warren, J. Adam, L. Kienle, A. M. Minor, R. Adelung, and Y. K. Mishra: Piezoresistive Response of Quasi-One-Dimensional ZnO Nanowires Using an in Situ Electromechanical Device. Acs Omega, 2(6), 2985-2993, June 2017. http://dx.doi.org/10.1021/acsomega.7b00041 

Financial Support

The Collaborative Research Center 1261 is funded by the German Research Foundation (DFG).

SFB1261 Microsite

Click here to visit our Microsite with information for students, teachers and the public (German and English version available).

Recent Publications

J. Reermann, P. Durdaut, S. Salzer, T. Demming, A. Piorra, E. Quandt, N. Frey, M. Höft, and G. Schmidt: Evaluation of Magnetoelectric Sensor Systems for Cardiological Applications, Measurement (Elsevier), ISSN 0263-2241, 2017, https://doi.org/10.1016/j.measurement.2017.09.047

S. B. Hrkac, C. T. Koops, M. Abes, C. Krywka, M. Müller, M. Burghammer, M. Sztucki, T. Dane, Kaps, Y. K. Mishra,R. Adelung, J. Schmalz, M. Gerken, E. Lage, C. Kirchhof, E. Quandt, O. M. Magnussen, and B. M. Murphy: Tunable Strain in Magnetoelectric ZnO Microrod Composite Interfaces; ACS Appl. Mater. Interfaces, 2017, 9 (30), pp 25571–25577; DOI: 10.1021/acsami.6b15598

 

Contact

sfb1261@tf.uni-kiel.de

Chairman:

Prof. Dr. Eckhard Quandt

Kiel University
Institute for Materials Science

 

Interner Server

 

CAU

Christian-Albrechts-Universität zu Kiel (CAU)

Christ.-Albrechts-Platz 4
D-24118 Kiel

UKSH

University Hospital Schleswig-Holstein, Campus Kiel (UKSH)

Arnold-Heller-Straße 3
D-24105 Kiel

ISIT

Fraunhofer Institute for Silicon Technology, Itzehoe (ISIT)

Fraunhoferstrasse 1
D-25524 Itzehoe  

IPN

IPN - Leibniz-Institut für die Pädagogik der Naturwissenschaften und Mathematik an der Universität Kiel

Olshausenstraße 62 
D-24118 Kiel

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