Size Induced Structural Changes in Molybdenum Oxide Nanoparticles

Troels Lindahl Christiansen; Espen D. Bojesen; Mikkel Juelsholt; Joanne Etheridge; Kirsten M. O. Jensen

doi:10.1021/acsnano.9b01367

Size Induced Structural Changes in Molybdenum Oxide Nanoparticles

Troels Lindahl Christiansen, Espen D. Bojesen, Mikkel Juelsholt, Joanne Etheridge, Kirsten M. O. Jensen

Kemisk Institut

9 Citationer (Scopus)

Abstract

Nanosizing of metal oxide particles is a common strategy for improving materials properties; however, small particles often take structures different from the bulk material. MoO₂ nanoparticles show a structure that is distinct from the bulk distorted rutile structure and which has not yet been determined. Here, we present a model for nanostructured MoO₂ obtained through detailed atomic pair distribution function analysis combined with high-resolution electron microscopy. Defects occur in the arrangement of [MoO₆] octahedra, in both large (40-100 nm) nanoparticles, where the overall distorted rutile structure is preserved, and in small nanoparticles (<5 nm), where a new nanostructure is formed. The study provides a piece in the puzzle of understanding the structure/properties relationship of molybdenum oxides and further our understanding of the origin of structural changes taking place upon nanosizing in oxide materials.

Originalsprog	Engelsk
Tidsskrift	ACS Nano
Vol/bind	13
Udgave nummer	8
Sider (fra-til)	8725-8735
ISSN	1936-0851
DOI	https://doi.org/10.1021/acsnano.9b01367
Status	Udgivet - 27 aug. 2019

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10.1021/acsnano.9b01367

Citationsformater

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title = "Size Induced Structural Changes in Molybdenum Oxide Nanoparticles",

abstract = "Nanosizing of metal oxide particles is a common strategy for improving materials properties; however, small particles often take structures different from the bulk material. MoO2 nanoparticles show a structure that is distinct from the bulk distorted rutile structure and which has not yet been determined. Here, we present a model for nanostructured MoO2 obtained through detailed atomic pair distribution function analysis combined with high-resolution electron microscopy. Defects occur in the arrangement of [MoO6] octahedra, in both large (40-100 nm) nanoparticles, where the overall distorted rutile structure is preserved, and in small nanoparticles (<5 nm), where a new nanostructure is formed. The study provides a piece in the puzzle of understanding the structure/properties relationship of molybdenum oxides and further our understanding of the origin of structural changes taking place upon nanosizing in oxide materials.",

keywords = "nanostructures, nanoparticles, structural characterization, total scattering, pair distribution function analysis, high resolution electron microscopy, molybdenum oxide",

author = "Christiansen, {Troels Lindahl} and Bojesen, {Espen D.} and Mikkel Juelsholt and Joanne Etheridge and Jensen, {Kirsten M. O.}",

year = "2019",

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T1 - Size Induced Structural Changes in Molybdenum Oxide Nanoparticles

AU - Christiansen, Troels Lindahl

AU - Bojesen, Espen D.

AU - Juelsholt, Mikkel

AU - Etheridge, Joanne

AU - Jensen, Kirsten M. O.

PY - 2019/8/27

Y1 - 2019/8/27

N2 - Nanosizing of metal oxide particles is a common strategy for improving materials properties; however, small particles often take structures different from the bulk material. MoO2 nanoparticles show a structure that is distinct from the bulk distorted rutile structure and which has not yet been determined. Here, we present a model for nanostructured MoO2 obtained through detailed atomic pair distribution function analysis combined with high-resolution electron microscopy. Defects occur in the arrangement of [MoO6] octahedra, in both large (40-100 nm) nanoparticles, where the overall distorted rutile structure is preserved, and in small nanoparticles (<5 nm), where a new nanostructure is formed. The study provides a piece in the puzzle of understanding the structure/properties relationship of molybdenum oxides and further our understanding of the origin of structural changes taking place upon nanosizing in oxide materials.

AB - Nanosizing of metal oxide particles is a common strategy for improving materials properties; however, small particles often take structures different from the bulk material. MoO2 nanoparticles show a structure that is distinct from the bulk distorted rutile structure and which has not yet been determined. Here, we present a model for nanostructured MoO2 obtained through detailed atomic pair distribution function analysis combined with high-resolution electron microscopy. Defects occur in the arrangement of [MoO6] octahedra, in both large (40-100 nm) nanoparticles, where the overall distorted rutile structure is preserved, and in small nanoparticles (<5 nm), where a new nanostructure is formed. The study provides a piece in the puzzle of understanding the structure/properties relationship of molybdenum oxides and further our understanding of the origin of structural changes taking place upon nanosizing in oxide materials.

KW - nanostructures

KW - nanoparticles

KW - structural characterization

KW - total scattering

KW - pair distribution function analysis

KW - high resolution electron microscopy

KW - molybdenum oxide

U2 - 10.1021/acsnano.9b01367

DO - 10.1021/acsnano.9b01367

M3 - Journal article

C2 - 31361462

SN - 1936-0851

VL - 13

SP - 8725

EP - 8735

JO - ACS Nano

JF - ACS Nano

IS - 8

ER -

Size Induced Structural Changes in Molybdenum Oxide Nanoparticles

Abstract

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