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  4. Surface-controlled mechanical properties of bulk nanoporous gold
 
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Surface-controlled mechanical properties of bulk nanoporous gold

Citation Link: https://doi.org/10.15480/882.1328
Publikationstyp
Doctoral Thesis
Date Issued
2016
Sprache
English
Author(s)
Mameka, Nadiia  
Advisor
Weissmüller, Jörg  
Referee
Birringer, Rainer  
Title Granting Institution
Technische Universität Hamburg
Place of Title Granting Institution
Hamburg
Examination Date
2015-11-17
Institut
Werkstoffphysik und -technologie M-22  
TORE-DOI
10.15480/882.1328
TORE-URI
http://tubdok.tub.tuhh.de/handle/11420/1331
This study highlights a smart hybrid material based on nanoporous gold in an aqueous electrolyte whose stiffness and strength are reversibly tuned by external stimuli. The tunability of these effective mechanical properties is realized via application of electric potentials to the large gold-electrolyte interface of the material, and consequent control of the surface state through electrical polarization and adsorption. The experiments are implemented in situ under environmental control in a dynamic mechanical analyzer and a mechanical testing device. The results of the in situ experiments provide conclusive evidence for the impact of surface excess elasticity on the effective elastic response of nanostructures and support a hypothesis that surface tension is a dominant factor in controlling their plasticity.
Subjects
Nanoporous Gold
Dealloying
Surface Excess Elasticity
Surface Stress
Surface Tension
DDC Class
600: Technik
Lizenz
http://rightsstatements.org/vocab/InC/1.0/
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