Transformation dynamics of Ni clusters into NiO rings under electron beam irradiation

Daniel Knez; Philipp Thaler; Alexander VOLK; Gerald Kothleitner; Wolfgang Ernst; Ferdinand Hofer

doi:10.1016/j.ultramic.2016.12.012

Transformation dynamics of Ni clusters into NiO rings under electron beam irradiation

Daniel Knez, Philipp Thaler, Alexander VOLK, Gerald Kothleitner, Wolfgang Ernst, Ferdinand Hofer

Research output: Contribution to journal › Article › peer-review

Abstract

WereportthetransformationofnickelclustersintoNiOringsbyanelectronbeaminducednanoscaleKirkendall effect.High-puritynickelclustersconsistingofafewthousandatomshavebeenusedasprecursors andweresynthesizedwiththesuperfluid heliumdroplettechnique.Aberration-corrected,analytical scanningtransmissionelectronmicroscopywasappliedtooxidiseandsimultaneouslyanalysethe nanostructures.Thetransientdynamicsoftheoxidationcouldbedocumentedbytimelapseseriesusing high-angleannulardark-field imagingandelectronenergy-lossspectroscopy.Atwo-stepCabrera-Mott oxidationmechanismwasidentified. Itwasfoundthatwateradsorbedadjacenttotheclustersactsas oxygensourcefortheelectronbeaminducedoxidation.Thesize-dependentoxidationratewases-timated byquantitativeEELSmeasurementscombinedwithmoleculardynamicssimulations.Ourfindings couldservetobettercontrolsamplechangesduringexaminationinanelectronmicroscope,andmight provideamethodologytogenerateothermetaloxidenanostructures.

Original language	English
Pages (from-to)	105-111
Journal	Ultramicroscopy
Volume	176
DOIs	https://doi.org/10.1016/j.ultramic.2016.12.012
Publication status	Published - 2017

ASJC Scopus subject areas

General Materials Science

Fields of Expertise

Advanced Materials Science

Treatment code (Nähere Zuordnung)

Basic - Fundamental (Grundlagenforschung)

Access to Document

10.1016/j.ultramic.2016.12.012Licence: Unspecified

Cite this

@article{f9ac9a1cec5b4c079eca90889449c70e,

title = "Transformation dynamics of Ni clusters into NiO rings under electron beam irradiation",

abstract = "WereportthetransformationofnickelclustersintoNiOringsbyanelectronbeaminducednanoscaleKirkendall effect.High-puritynickelclustersconsistingofafewthousandatomshavebeenusedasprecursors andweresynthesizedwiththesuperfluid heliumdroplettechnique.Aberration-corrected,analytical scanningtransmissionelectronmicroscopywasappliedtooxidiseandsimultaneouslyanalysethe nanostructures.Thetransientdynamicsoftheoxidationcouldbedocumentedbytimelapseseriesusing high-angleannulardark-field imagingandelectronenergy-lossspectroscopy.Atwo-stepCabrera-Mott oxidationmechanismwasidentified. Itwasfoundthatwateradsorbedadjacenttotheclustersactsas oxygensourcefortheelectronbeaminducedoxidation.Thesize-dependentoxidationratewases-timated byquantitativeEELSmeasurementscombinedwithmoleculardynamicssimulations.Ourfindings couldservetobettercontrolsamplechangesduringexaminationinanelectronmicroscope,andmight provideamethodologytogenerateothermetaloxidenanostructures.",

author = "Daniel Knez and Philipp Thaler and Alexander VOLK and Gerald Kothleitner and Wolfgang Ernst and Ferdinand Hofer",

year = "2017",

doi = "10.1016/j.ultramic.2016.12.012",

language = "English",

volume = "176",

pages = "105--111",

journal = "Ultramicroscopy",

issn = "0304-3991",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Transformation dynamics of Ni clusters into NiO rings under electron beam irradiation

AU - Knez, Daniel

AU - Thaler, Philipp

AU - VOLK, Alexander

AU - Kothleitner, Gerald

AU - Ernst, Wolfgang

AU - Hofer, Ferdinand

PY - 2017

Y1 - 2017

N2 - WereportthetransformationofnickelclustersintoNiOringsbyanelectronbeaminducednanoscaleKirkendall effect.High-puritynickelclustersconsistingofafewthousandatomshavebeenusedasprecursors andweresynthesizedwiththesuperfluid heliumdroplettechnique.Aberration-corrected,analytical scanningtransmissionelectronmicroscopywasappliedtooxidiseandsimultaneouslyanalysethe nanostructures.Thetransientdynamicsoftheoxidationcouldbedocumentedbytimelapseseriesusing high-angleannulardark-field imagingandelectronenergy-lossspectroscopy.Atwo-stepCabrera-Mott oxidationmechanismwasidentified. Itwasfoundthatwateradsorbedadjacenttotheclustersactsas oxygensourcefortheelectronbeaminducedoxidation.Thesize-dependentoxidationratewases-timated byquantitativeEELSmeasurementscombinedwithmoleculardynamicssimulations.Ourfindings couldservetobettercontrolsamplechangesduringexaminationinanelectronmicroscope,andmight provideamethodologytogenerateothermetaloxidenanostructures.

AB - WereportthetransformationofnickelclustersintoNiOringsbyanelectronbeaminducednanoscaleKirkendall effect.High-puritynickelclustersconsistingofafewthousandatomshavebeenusedasprecursors andweresynthesizedwiththesuperfluid heliumdroplettechnique.Aberration-corrected,analytical scanningtransmissionelectronmicroscopywasappliedtooxidiseandsimultaneouslyanalysethe nanostructures.Thetransientdynamicsoftheoxidationcouldbedocumentedbytimelapseseriesusing high-angleannulardark-field imagingandelectronenergy-lossspectroscopy.Atwo-stepCabrera-Mott oxidationmechanismwasidentified. Itwasfoundthatwateradsorbedadjacenttotheclustersactsas oxygensourcefortheelectronbeaminducedoxidation.Thesize-dependentoxidationratewases-timated byquantitativeEELSmeasurementscombinedwithmoleculardynamicssimulations.Ourfindings couldservetobettercontrolsamplechangesduringexaminationinanelectronmicroscope,andmight provideamethodologytogenerateothermetaloxidenanostructures.

U2 - 10.1016/j.ultramic.2016.12.012

DO - 10.1016/j.ultramic.2016.12.012

M3 - Article

SN - 0304-3991

VL - 176

SP - 105

EP - 111

JO - Ultramicroscopy

JF - Ultramicroscopy

ER -