Abrupt elastic-to-plastic transition in pentagonal nanowires under bending

Simple item page
dc.contributor.authorVlassov, Sergei
dc.contributor.authorMets, Magnus
dc.contributor.authorPolyakov, Boris
dc.contributor.authorBian, Jianjun
dc.contributor.authorDorogin, Leonid
dc.contributor.authorZadin, Vahur
dc.date.accessioned2020-08-19T16:57:21Z
dc.date.available2020-08-19T16:57:21Z
dc.date.issued2019
dc.descriptionMD modeling and calculations were supported by Russian Science Foundation project grant 18-19-00645 “Adhesion of polymer-based soft materials: from liquid to solid”; mechanical testing and FEM simulations were supported by Estonian Research Council projects PUT1689 and PUT1372.en_US
dc.description.abstractIn this study, pentagonal Ag and Au nanowires (NWs) were bent in cantilever beam configuration inside a scanning electron microscope. We demonstrated an unusual, abrupt elastic-to-plastic transition, observed as a sudden change of the NW profile from smooth arc-shaped to angled knee-like during the bending in the narrow range of bending angles. In contrast to the behavior of NWs in the tensile and three-point bending tests, where extensive elastic deformation was followed by brittle fracture, in our case, after the abrupt plastic event, the NW was still far from fracture and enabled further bending without breaking. A possible explanation is that the five-fold twinned structure prevents propagation of critical defects, leading to dislocation pile up that may lead to sudden stress release, which is observed as an abrupt plastic event. Moreover, we found that if the NWs are coated with alumina, the abrupt plastic event is not observed and the NWs can withstand severe deformation in the elastic regime without fracture. The coating may possibly prevent formation of dislocations. Mechanical durability under high and inhomogeneous strain fields is an important aspect of exploiting Ag and Au NWs in applications like waveguiding or conductive networks in flexible polymer composite materials.en_US
dc.description.sponsorshipEesti Teadusagentuur PUT1372,PUT1689; Russian Science Foundation 18-19-00645; Institute of Solid State Physics, University of Latvia as the Center of Excellence has received funding from the European Union’s Horizon 2020 Framework Programme H2020-WIDESPREAD-01-2016-2017-TeamingPhase2 under grant agreement No. 739508, project CAMART²en_US
dc.identifier.doi10.3762/bjnano.10.237
dc.identifier.issn2190-4286
dc.identifier.urihttps://dspace.lu.lv/dspace/handle/7/52398
dc.language.isoengen_US
dc.publisherBeilstein-Institut Zur Forderung der Chemischen Wissenschaftenen_US
dc.relationinfo:eu-repo/grantAgreement/EC/H2020/739508/EU/Centre of Advanced Material Research and Technology Transfer/CAMART²en_US
dc.relation.ispartofseriesBeilstein Journal of Nanotechnology;10, 237
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectResearch Subject Categories::NATURAL SCIENCES:Physicsen_US
dc.subjectFinite element methoden_US
dc.subjectMechanical propertiesen_US
dc.subjectMolecular dynamicsen_US
dc.subjectNanowiresen_US
dc.titleAbrupt elastic-to-plastic transition in pentagonal nanowires under bendingen_US
dc.typeinfo:eu-repo/semantics/articleen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
2190-4286-10-237.pdf
Size:
4.18 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Zinātniskie raksti (CFI) / Scientific articles