Thermal Stability and Shape Evolution of Tetrahexahedral Au–Pd Core–Shell Nanoparticles with High-Index Facets

AbstractThis paper presents a study of heating-induced size and shape change for pre-synthesized composite nanoparticles of ∼2 nm gold cores encapsulated with alkanethiolate monolayers. The results have demonstrated an evolution in size and shape of the nanoparticles towards monodispersed larger core sizes with well-defined and highly-faceted morphologies. The evolved particles were encapsulated with the thiolate shells. The morphological and structural evolutions were characterized using TEM, XRD, UV-Vis and FTIR spectroscopy. While temperature-driven crystal growth is known for non-encapsulated particles, the evolution of the thiolate-encapsulated nanoparticles in solutions into well-defined morphologies represents an intriguing example of temperature manipulations of nanoparticle monodispersity and shape.

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Thermal Stability of Core–Shell Nanoparticles: A Combined in Situ Study by XPS and TEM

Chemistry of Materials ◽

10.1021/acs.chemmater.5b01862 ◽

2015 ◽

Vol 27 (20) ◽

pp. 6960-6968 ◽

Cited By ~ 41

Author(s):

Cecile S. Bonifacio ◽

Sophie Carenco ◽

Cheng Hao Wu ◽

Stephen D. House ◽

Hendrik Bluhm ◽

...

Keyword(s):

Thermal Stability ◽

Core Shell ◽

Shell Nanoparticles ◽

In Situ Study ◽

Core Shell Nanoparticles ◽

Thermal Stability Of

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Computer Modeling of the Formation Process of Core-Shell Nanoparticles Cu@Si

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.271.47 ◽

2018 ◽

Vol 271 ◽

pp. 47-50 ◽

Cited By ~ 4

Author(s):

Natalia V. Yumozhapova ◽

Andrey V. Nomoev ◽

Yuri Ya. Gafner

Keyword(s):

Thermal Stability ◽

Formation Process ◽

Molecular Dynamic Method ◽

Dynamic Method ◽

Core Shell ◽

Shell Nanoparticles ◽

Droplet Behavior ◽

Core Shell Structure ◽

Core Shell Nanoparticles ◽

Thermal Stability Of

The process of nanoparticle Cu@Si formation by the molecular dynamic method using MEAM-potentials was studied. Modeling the droplet behavior demonstrates that a core-shell structure with a copper core and a silicon shell can be formed if the drop is in the liquid state, until the material is finally redistributed. The parameters of thermal stability of Cu@Si composite nanoparticles of different sizes have been determined. It is concluded that as the temperature increases, the diffusion of copper atoms to the surface begins, which leads to a change in the structure and the formation of particles with a core of the Cu@Si type.

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Synthesis of Cu@Ag core–shell nanoparticles for characterization of thermal stability and electric resistivity

Applied Physics A ◽

10.1007/s00339-018-1887-8 ◽

2018 ◽

Vol 124 (7) ◽

Cited By ~ 9

Author(s):

Shengyan Shang ◽

Anil Kunwar ◽

Yanfeng Wang ◽

Xiao Qi ◽

Haitao Ma ◽

...

Keyword(s):

Thermal Stability ◽

Electric Resistivity ◽

Core Shell ◽

Shell Nanoparticles ◽

Core Shell Nanoparticles

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Thermal Stability Study of Ni-Co Core-Shell Nanoparticles by in situ TEM

Microscopy and Microanalysis ◽

10.1017/s1431927614004802 ◽

2014 ◽

Vol 20 (S3) ◽

pp. 616-617 ◽

Cited By ~ 1

Author(s):

Cecile S. Bonifacio ◽

Sophie Carenco ◽

Miquel Salmeron ◽

Judith C. Yang

Keyword(s):

Thermal Stability ◽

Stability Study ◽

Core Shell ◽

In Situ Tem ◽

Shell Nanoparticles ◽

Core Shell Nanoparticles ◽

Thermal Stability Study

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Core-shell Ge Nanoparticles on Oxide Surfaces for Enhanced Interface Stability

MRS Proceedings ◽

10.1557/proc-0933-g02-07 ◽

2006 ◽

Vol 933 ◽

Author(s):

Scott K. Stanley ◽

John G. Ekerdt

Keyword(s):

Thermal Stability ◽

Photoelectron Spectroscopy ◽

Chemical Vapor ◽

Core Shell ◽

Ion Scattering ◽

Shell Nanoparticles ◽

X Ray ◽

Low Energy Ion Scattering ◽

Core Shell Nanoparticles ◽

Thermal Stability Of

ABSTRACTGermanium nanoparticles are grown on HfO2 substrates by hot-wire chemical vapor deposition (HWCVD). The oxidation and thermal stability of these unmodified Ge nanoparticles are determined with X-ray photoelectron spectroscopy (XPS). Core-shell nanoparticles were then prepared by growing the Ge cores with HWCVD and selectively growing Si or C shell layers on the Ge cores by conventional CVD. The formation of core-shell nanoparticles was monitored with XPS and low energy ion scattering. Large differences are observed in the thermal stability and oxide formation for unmodified Ge and the different core-shell nanoparticles.

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