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Measurement of local crystal lattice strain variations in dealloyed nanoporous gold
Citation Link: https://doi.org/10.15480/882.2160
Publikationstyp
Journal Article
Date Issued
2018-01-02
Sprache
English
TORE-DOI
TORE-URI
Journal
Volume
6
Issue
1
Start Page
84
End Page
92
Citation
Materials Research Letters 1 (6): 84-92 (2018-01-02)
Publisher DOI
Scopus ID
Publisher
Taylor & Francis
Reversible macroscopic length changes in nanoporous structures can be achieved by applying electric potentials or by exposing them to different gases or liquids. Thus, these materials are interesting candidates for applications as sensors or actuators. Macroscopic length changes originate from microscopic changes of crystal lattice parameters. In this report, we show spatially resolved measurements of crystal lattice strain in dealloyed nanoporous gold. The results confirm theory by indicating a compression of the lattice along the axis of cylindrically shaped ligaments and an expansion in radial direction. Furthermore, we show that curved npAu surfaces show inward relaxation of the surface layer. (Figure presented) IMPACT STATEMENT We show spatially resolved measurements of strain in nanoporous gold confirming theory: Crystal lattice is compressed along the axis of cylindrical ligaments and expanded in radial direction, surfaces relax inward.
Subjects
Nanoporous gold
lattice strain
sensor
actuator
nano-beam electron diffraction
DDC Class
620: Ingenieurwissenschaften
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