Experimental determination of the energy difference between competing isomers of deposited, size-selected gold nanoclusters

Research output: Contribution to journalArticle

Standard

Experimental determination of the energy difference between competing isomers of deposited, size-selected gold nanoclusters. / Foster, D.; Ferrando, R; Palmer, Richard.

In: Nature Communications, Vol. 9, 1323, 03.04.2018.

Research output: Contribution to journalArticle

Harvard

APA

Vancouver

Author

Bibtex

@article{389b165715ca40e7922dc71becd82767,
title = "Experimental determination of the energy difference between competing isomers of deposited, size-selected gold nanoclusters",
abstract = "The equilibrium structures and dynamics of a nanoscale system are regulated by a complex potential energy surface (PES). This is a key target of theoretical calculations but experimentally elusive. We report the measurement of a key PES parameter for a model nanosystem: size-selected Au nanoclusters, soft-landed on amorphous silicon nitride supports. We obtain the energy difference between the most abundant structural isomers of magic number Au561 clusters, the decahedron and face-centred-cubic (fcc) structures, from the equilibrium proportions of the isomers. These are measured by atomic-resolution scanning transmission electron microscopy, with an ultra-stable heating stage, as a function of temperature (125–500 °C). At lower temperatures (20–125 °C) the behaviour is kinetic, exhibiting down conversion of metastable decahedra into fcc structures; the higher state is repopulated at higher temperatures in equilibrium. We find the decahedron is 0.040 ± 0.020 eV higher in energy than the fcc isomer, providing a benchmark for the theoretical treatment of nanoparticles.",
author = "D. Foster and R Ferrando and Richard Palmer",
year = "2018",
month = "4",
day = "3",
doi = "10.1038/s41467-018-03794-9",
language = "English",
volume = "9",
journal = "Nature Communications",
issn = "2041-1723",
publisher = "Springer",

}

RIS

TY - JOUR

T1 - Experimental determination of the energy difference between competing isomers of deposited, size-selected gold nanoclusters

AU - Foster, D.

AU - Ferrando, R

AU - Palmer, Richard

PY - 2018/4/3

Y1 - 2018/4/3

N2 - The equilibrium structures and dynamics of a nanoscale system are regulated by a complex potential energy surface (PES). This is a key target of theoretical calculations but experimentally elusive. We report the measurement of a key PES parameter for a model nanosystem: size-selected Au nanoclusters, soft-landed on amorphous silicon nitride supports. We obtain the energy difference between the most abundant structural isomers of magic number Au561 clusters, the decahedron and face-centred-cubic (fcc) structures, from the equilibrium proportions of the isomers. These are measured by atomic-resolution scanning transmission electron microscopy, with an ultra-stable heating stage, as a function of temperature (125–500 °C). At lower temperatures (20–125 °C) the behaviour is kinetic, exhibiting down conversion of metastable decahedra into fcc structures; the higher state is repopulated at higher temperatures in equilibrium. We find the decahedron is 0.040 ± 0.020 eV higher in energy than the fcc isomer, providing a benchmark for the theoretical treatment of nanoparticles.

AB - The equilibrium structures and dynamics of a nanoscale system are regulated by a complex potential energy surface (PES). This is a key target of theoretical calculations but experimentally elusive. We report the measurement of a key PES parameter for a model nanosystem: size-selected Au nanoclusters, soft-landed on amorphous silicon nitride supports. We obtain the energy difference between the most abundant structural isomers of magic number Au561 clusters, the decahedron and face-centred-cubic (fcc) structures, from the equilibrium proportions of the isomers. These are measured by atomic-resolution scanning transmission electron microscopy, with an ultra-stable heating stage, as a function of temperature (125–500 °C). At lower temperatures (20–125 °C) the behaviour is kinetic, exhibiting down conversion of metastable decahedra into fcc structures; the higher state is repopulated at higher temperatures in equilibrium. We find the decahedron is 0.040 ± 0.020 eV higher in energy than the fcc isomer, providing a benchmark for the theoretical treatment of nanoparticles.

U2 - 10.1038/s41467-018-03794-9

DO - 10.1038/s41467-018-03794-9

M3 - Article

VL - 9

JO - Nature Communications

JF - Nature Communications

SN - 2041-1723

M1 - 1323

ER -