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dc.contributor.author
Yarema, Olesya
dc.contributor.author
Perevedentsev, Aleksandr
dc.contributor.author
Ovuka, Vladimir
dc.contributor.author
Baade, Paul
dc.contributor.author
Volk, Sebastian
dc.contributor.author
Wood, Vanessa
dc.contributor.author
Yarema, Maksym
dc.date.accessioned
2018-09-20T13:43:44Z
dc.date.available
2018-09-10T09:30:37Z
dc.date.available
2018-09-10T11:49:26Z
dc.date.available
2018-09-10T11:50:17Z
dc.date.available
2018-09-20T13:43:44Z
dc.date.issued
2018
dc.identifier.issn
0897-4756
dc.identifier.other
10.1021/acs.chemmater.8b02702
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/288007
dc.identifier.doi
10.3929/ethz-b-000288007
dc.description.abstract
Phase-change memory materials refer to a class of materials that can exist in amorphous and crystalline phases with distinctly different electrical or optical properties, as well as exhibit outstanding crystallization kinetics and optimal phase transition temperatures. This paper focuses on the potential of colloids as phase-change memory materials. We report a novel synthesis for amorphous GeTe nanoparticles based on an amide-promoted approach that enables accurate size control of GeTe nanoparticles between 4 and 9 nm, narrow size distributions down to 9–10%, and synthesis upscaling to reach multigram chemical yields per batch. We then quantify the crystallization phase transition for GeTe nanoparticles, employing high-temperature X-ray diffraction, differential scanning calorimetry, and transmission electron microscopy. We show that GeTe nanoparticles crystallize at higher temperatures than the bulk GeTe material and that crystallization temperature increases with decreasing size. We can explain this size-dependence using the entropy of crystallization model and classical nucleation theory. The size-dependences quantified here highlight possible benefits of nanoparticles for phase-change memory applications.
en_US
dc.format
a
en_US
dc.language.iso
en
en_US
dc.publisher
American Chemical Society
en_US
dc.rights.uri
http://rightsstatements.org/page/InC-NC/1.0/
dc.title
Colloidal Phase-Change Materials: Synthesis of Monodisperse GeTe Nanoparticles and Quantification of Their Size-Dependent Crystallization
en_US
dc.type
Journal Article
dc.rights.license
In Copyright - Non-Commercial Use Permitted
dc.date.published
2018-08-20
ethz.journal.title
Chemistry of Materials
ethz.journal.volume
30
en_US
ethz.journal.issue
17
en_US
ethz.journal.abbreviated
Chem. Mater.
ethz.pages.start
6134
en_US
ethz.pages.end
6143
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.grant
Colloidal nanocrystals of intermetallic compounds and alloys for phase-change memory applications
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Washington, DC
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02140 - Dep. Inf.technologie und Elektrotechnik / Dep. of Inform.Technol. Electrical Eng.::02634 - Institut für Elektronik / Institute for Electronics::03895 - Wood, Vanessa / Wood, Vanessa
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02140 - Dep. Inf.technologie und Elektrotechnik / Dep. of Inform.Technol. Electrical Eng.::02634 - Institut für Elektronik / Institute for Electronics::03895 - Wood, Vanessa / Wood, Vanessa
en_US
ethz.grant.agreementno
161249
ethz.grant.fundername
SNF
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.program
ethz.date.deposited
2018-09-10T09:30:38Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2018-09-20T13:43:56Z
ethz.rosetta.lastUpdated
2019-02-03T08:07:18Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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