Atom-resolved imaging of dynamic shape changes in supported copper nanocrystals

Poul L. Hansen; Jakob Birkedal Wagner; Stig Helveg; Jens R. Rostrup-Nielsen; Bjerne S. Clausen; Henrik Topsøe

doi:10.1126/science.1069325

Atom-resolved imaging of dynamic shape changes in supported copper nanocrystals

Poul L. Hansen, Jakob Birkedal Wagner, Stig Helveg, Jens R. Rostrup-Nielsen, Bjerne S. Clausen, Henrik Topsøe

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

In situ transmission electron microscopy is used to obtain atom-resolved images of copper nanocrystals on different supports. These are catalysts for methanol synthesis and hydrocarbon conversion processes for fuel cells. The nanocrystals undergo dynamic reversible shape changes in response to changes in the gaseous environment. For zinc oxide-supported samples, the changes are caused both by adsorbate-induced changes in surface energies and by changes in the interfacial energy. For copper nanocrystals supported on silica, the support has negligible influence on the structure. Nanoparticle dynamics must be included in the description of catalytic and other properties of nanomaterials. In situ microscopy offers possibilities for obtaining the relevant atomicscale insight.

Original language	English
Journal	Science
Volume	295
Issue number	5562
Pages (from-to)	2053-2055
Number of pages	3
ISSN	0036-8075
DOIs	https://doi.org/10.1126/science.1069325
Publication status	Published - 2002
Externally published	Yes

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title = "Atom-resolved imaging of dynamic shape changes in supported copper nanocrystals",

abstract = "In situ transmission electron microscopy is used to obtain atom-resolved images of copper nanocrystals on different supports. These are catalysts for methanol synthesis and hydrocarbon conversion processes for fuel cells. The nanocrystals undergo dynamic reversible shape changes in response to changes in the gaseous environment. For zinc oxide-supported samples, the changes are caused both by adsorbate-induced changes in surface energies and by changes in the interfacial energy. For copper nanocrystals supported on silica, the support has negligible influence on the structure. Nanoparticle dynamics must be included in the description of catalytic and other properties of nanomaterials. In situ microscopy offers possibilities for obtaining the relevant atomicscale insight.",

author = "Hansen, {Poul L.} and Wagner, {Jakob Birkedal} and Stig Helveg and Rostrup-Nielsen, {Jens R.} and Clausen, {Bjerne S.} and Henrik Tops{\o}e",

year = "2002",

doi = "10.1126/science.1069325",

language = "English",

volume = "295",

pages = "2053--2055",

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T1 - Atom-resolved imaging of dynamic shape changes in supported copper nanocrystals

AU - Hansen, Poul L.

AU - Wagner, Jakob Birkedal

AU - Helveg, Stig

AU - Rostrup-Nielsen, Jens R.

AU - Clausen, Bjerne S.

AU - Topsøe, Henrik

PY - 2002

Y1 - 2002

N2 - In situ transmission electron microscopy is used to obtain atom-resolved images of copper nanocrystals on different supports. These are catalysts for methanol synthesis and hydrocarbon conversion processes for fuel cells. The nanocrystals undergo dynamic reversible shape changes in response to changes in the gaseous environment. For zinc oxide-supported samples, the changes are caused both by adsorbate-induced changes in surface energies and by changes in the interfacial energy. For copper nanocrystals supported on silica, the support has negligible influence on the structure. Nanoparticle dynamics must be included in the description of catalytic and other properties of nanomaterials. In situ microscopy offers possibilities for obtaining the relevant atomicscale insight.

AB - In situ transmission electron microscopy is used to obtain atom-resolved images of copper nanocrystals on different supports. These are catalysts for methanol synthesis and hydrocarbon conversion processes for fuel cells. The nanocrystals undergo dynamic reversible shape changes in response to changes in the gaseous environment. For zinc oxide-supported samples, the changes are caused both by adsorbate-induced changes in surface energies and by changes in the interfacial energy. For copper nanocrystals supported on silica, the support has negligible influence on the structure. Nanoparticle dynamics must be included in the description of catalytic and other properties of nanomaterials. In situ microscopy offers possibilities for obtaining the relevant atomicscale insight.

U2 - 10.1126/science.1069325

DO - 10.1126/science.1069325

M3 - Journal article

C2 - 11896271

SN - 0036-8075

VL - 295

SP - 2053

EP - 2055

JO - Science

JF - Science

IS - 5562

ER -

Atom-resolved imaging of dynamic shape changes in supported copper nanocrystals

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