Issue 26, 2009
From the journal:

Physical Chemistry Chemical Physics

Time-domain electrostatic force spectroscopy on nanostructured lithium-ion conducting glass ceramics: analysis and interpretation of relaxation times†

Ahmet Taskiran,a   André Schirmeisen,*a   Harald Fuchs,a   Hartmut Brachtb  and  Bernhard Roling*c  

* Corresponding authors

a Center for Nanotechnology (CeNTech), Westfälische Wilhelms-Universität Münster, Heisenbergstrasse 11, Münster, Germany
E-mail: schirmeisen@uni-muenster.de

b Institut für Materialphysik, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Strasse. 10, Münster, Germany

c Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse, Marburg, Germany
E-mail: roling@staff.uni-marburg.de

Abstract

The nanoscopic electrical properties of LiAlSiO4 glass ceramics with different degrees of crystallinity χ were studied by means of time-domain electrostatic force spectroscopy (TDEFS). Thereby, a faster relaxation process due to lithium ion movements in the glassy phase and a slower process due to lithium ion movements in the crystallites could be distinguished. Over a broad range of crystallinity values, the TDEFS relaxation times of both processes are Arrhenius activated, with an activation energy being essentially independent of χ and with a pre-exponential factor depending in a systematic fashion on χ. With increasing crystallinity, the pre-exponential factor of the faster process (glassy phase) increases, while that of the slower process (crystallites) decreases. In order to explain this observation, we consider simple equivalent circuit models for the capacitance relaxation of the system AFM tip/gap/sample.

Graphical abstract: Time-domain electrostatic force spectroscopy on nanostructured lithium-ion conducting glass ceramics: analysis and interpretation of relaxation times

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Article information

DOI
https://doi.org/10.1039/B900175C
Article type
Paper
Submitted
05 Jan 2009
Accepted
19 Mar 2009
First published
17 Apr 2009

Phys. Chem. Chem. Phys., 2009,11, 5499-5505

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Time-domain electrostatic force spectroscopy on nanostructured lithium-ion conducting glass ceramics: analysis and interpretation of relaxation times

A. Taskiran, A. Schirmeisen, H. Fuchs, H. Bracht and B. Roling, Phys. Chem. Chem. Phys., 2009, 11, 5499 DOI: 10.1039/B900175C

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