Heterogeneous gas-phase synthesis and molecular dynamics modeling of janus and core-satellite Si-Ag nanoparticles

Vidyadhar Singh; Cathal Cassidy; Panagiotis Grammatikopoulos; Flyura Djurabekova; Kai Nordlund; Mukhles Sowwan

doi:10.1021/jp500684y

Heterogeneous gas-phase synthesis and molecular dynamics modeling of janus and core-satellite Si-Ag nanoparticles

Vidyadhar Singh, Cathal Cassidy^*, Panagiotis Grammatikopoulos, Flyura Djurabekova, Kai Nordlund, Mukhles Sowwan

^*Corresponding author for this work

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

77 Scopus citations

Abstract

Heterogeneous gas-phase condensation is a promising method of producing hybrid multifunctional nanoparticles with tailored composition and microstructure but also intrinsically introduces greater complexity to the nucleation process and growth kinetics. Herein, we report on the synthesis and growth modeling of silicon-silver (Si-Ag) hybrid nanoparticles using gas-aggregated cosputtering from elemental Si and Ag source targets. The final Si-Ag ensemble size was manipulated in the range 5-15 nm by appropriate tuning of the deposition parameters, while variations in the Si-Ag sputtering power ratio, from 1.8 to 2.25, allowed distinctive Janus and core-satellite structures, respectively, to be produced. Molecular dynamics simulations indicate that the individual species first form independent clusters of Si and Ag without significant intermixing. Collisions between unlike species are unstable in the early stages of growth (<100 ns), with large temperature differences resulting in rapid energy exchange and separation. Upon further cooling and depletion of isolated Si and Ag atoms through collection by parent clusters (>100 ns), Si-Ag cluster collisions ultimately result in stable hybrid structures.

Original language	English
Pages (from-to)	13869-13875
Number of pages	7
Journal	Journal of Physical Chemistry C
Volume	118
Issue number	25
DOIs	https://doi.org/10.1021/jp500684y
State	Published - 26 Jun 2014
Externally published	Yes

Access to Document

10.1021/jp500684y

Cite this

@article{7381b730ad6941ae98826ef60941ec6e,

title = "Heterogeneous gas-phase synthesis and molecular dynamics modeling of janus and core-satellite Si-Ag nanoparticles",

abstract = "Heterogeneous gas-phase condensation is a promising method of producing hybrid multifunctional nanoparticles with tailored composition and microstructure but also intrinsically introduces greater complexity to the nucleation process and growth kinetics. Herein, we report on the synthesis and growth modeling of silicon-silver (Si-Ag) hybrid nanoparticles using gas-aggregated cosputtering from elemental Si and Ag source targets. The final Si-Ag ensemble size was manipulated in the range 5-15 nm by appropriate tuning of the deposition parameters, while variations in the Si-Ag sputtering power ratio, from 1.8 to 2.25, allowed distinctive Janus and core-satellite structures, respectively, to be produced. Molecular dynamics simulations indicate that the individual species first form independent clusters of Si and Ag without significant intermixing. Collisions between unlike species are unstable in the early stages of growth (<100 ns), with large temperature differences resulting in rapid energy exchange and separation. Upon further cooling and depletion of isolated Si and Ag atoms through collection by parent clusters (>100 ns), Si-Ag cluster collisions ultimately result in stable hybrid structures.",

author = "Vidyadhar Singh and Cathal Cassidy and Panagiotis Grammatikopoulos and Flyura Djurabekova and Kai Nordlund and Mukhles Sowwan",

note = "Publisher Copyright: {\textcopyright} 2014 American Chemical Society.",

year = "2014",

month = jun,

day = "26",

doi = "10.1021/jp500684y",

language = "英语",

volume = "118",

pages = "13869--13875",

journal = "Journal of Physical Chemistry C",

issn = "1932-7447",

publisher = "American Chemical Society",

number = "25",

}

TY - JOUR

T1 - Heterogeneous gas-phase synthesis and molecular dynamics modeling of janus and core-satellite Si-Ag nanoparticles

AU - Singh, Vidyadhar

AU - Cassidy, Cathal

AU - Grammatikopoulos, Panagiotis

AU - Djurabekova, Flyura

AU - Nordlund, Kai

AU - Sowwan, Mukhles

PY - 2014/6/26

Y1 - 2014/6/26

N2 - Heterogeneous gas-phase condensation is a promising method of producing hybrid multifunctional nanoparticles with tailored composition and microstructure but also intrinsically introduces greater complexity to the nucleation process and growth kinetics. Herein, we report on the synthesis and growth modeling of silicon-silver (Si-Ag) hybrid nanoparticles using gas-aggregated cosputtering from elemental Si and Ag source targets. The final Si-Ag ensemble size was manipulated in the range 5-15 nm by appropriate tuning of the deposition parameters, while variations in the Si-Ag sputtering power ratio, from 1.8 to 2.25, allowed distinctive Janus and core-satellite structures, respectively, to be produced. Molecular dynamics simulations indicate that the individual species first form independent clusters of Si and Ag without significant intermixing. Collisions between unlike species are unstable in the early stages of growth (<100 ns), with large temperature differences resulting in rapid energy exchange and separation. Upon further cooling and depletion of isolated Si and Ag atoms through collection by parent clusters (>100 ns), Si-Ag cluster collisions ultimately result in stable hybrid structures.

AB - Heterogeneous gas-phase condensation is a promising method of producing hybrid multifunctional nanoparticles with tailored composition and microstructure but also intrinsically introduces greater complexity to the nucleation process and growth kinetics. Herein, we report on the synthesis and growth modeling of silicon-silver (Si-Ag) hybrid nanoparticles using gas-aggregated cosputtering from elemental Si and Ag source targets. The final Si-Ag ensemble size was manipulated in the range 5-15 nm by appropriate tuning of the deposition parameters, while variations in the Si-Ag sputtering power ratio, from 1.8 to 2.25, allowed distinctive Janus and core-satellite structures, respectively, to be produced. Molecular dynamics simulations indicate that the individual species first form independent clusters of Si and Ag without significant intermixing. Collisions between unlike species are unstable in the early stages of growth (<100 ns), with large temperature differences resulting in rapid energy exchange and separation. Upon further cooling and depletion of isolated Si and Ag atoms through collection by parent clusters (>100 ns), Si-Ag cluster collisions ultimately result in stable hybrid structures.

UR - http://www.scopus.com/inward/record.url?scp=84920645349&partnerID=8YFLogxK

U2 - 10.1021/jp500684y

DO - 10.1021/jp500684y

M3 - 文章

AN - SCOPUS:84920645349

SN - 1932-7447

VL - 118

SP - 13869

EP - 13875

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 25

ER -

Heterogeneous gas-phase synthesis and molecular dynamics modeling of janus and core-satellite Si-Ag nanoparticles

Abstract

Access to Document

Other files and links

Fingerprint

Cite this