Gas-phase synthesis of nanoparticles of group 12 chalcogenides

1997 ◽  
Vol 7 (9) ◽  
pp. 1855-1865 ◽  
Author(s):  
Nigel L. Pickett ◽  
Frank. G. Riddell ◽  
Douglas F. Foster ◽  
David J. Cole-Hamilton ◽  
John R. Fryer
Keyword(s):  
Gas Phase ◽  
Phase Synthesis ◽  
Synthesis Of Nanoparticles ◽  
Gas Phase Synthesis ◽  
Group 12

scholarly journals Gas-phase synthesis of nanoparticles: present status and perspectives

2018 ◽  
Vol 8 (03) ◽  
pp. 947-954 ◽  
Author(s):  
Y. Huttel ◽  
L. Martínez ◽  
A. Mayoral ◽  
I. Fernández
Keyword(s):  
Gas Phase ◽  
Present Status ◽  
Phase Synthesis ◽  
Synthesis Of Nanoparticles ◽  
Gas Phase Synthesis ◽  
Image Position

Abstract

scholarly journals Spontaneous Formation of Core@shell Co@Cr Nanoparticles by Gas Phase Synthesis

Applied Nano ◽  
2020 ◽  
Vol 1 (1) ◽  
pp. 87-101
Author(s):  
Jimena Soler-Morala ◽  
Elizabeth M. Jefremovas ◽  
Lidia Martínez ◽  
Álvaro Mayoral ◽  
Elena H. Sánchez ◽  
...  
Keyword(s):  
Gas Phase ◽  
Volume Ratio ◽  
Core Shell ◽  
Phase Synthesis ◽  
Synthesis Of Nanoparticles ◽  
Spontaneous Formation ◽  
Gas Phase Synthesis ◽  
First Case ◽  
Size Threshold ◽  
Thermal Stability Of

This work presents the gas phase synthesis of CoCr nanoparticles using a magnetron-based gas aggregation source. The effect of the particle size and Co/Cr ratio on the properties of the nanoparticles is investigated. In particular, we report the synthesis of nanoparticles from two alloy targets, Co90Cr10 and Co80Cr20. In the first case, we observe a size threshold for the spontaneous formation of a segregated core@shell structure, related to the surface to volume ratio. When this ratio is above one, a shell cannot be properly formed, whereas when this ratio decreases below unity the proportion of Cr atoms is high enough to allow the formation of a shell. In the latter case, the segregation of the Cr atoms towards the surface gives rise to the formation of a shell surrounding the Co core. When the proportion of Cr is increased in the target (Co80Cr20), a thicker shell is spontaneously formed for a similar nanoparticle size. The magnetic response was evaluated, and the influence of the structure and composition of the nanoparticles is discussed. An enhancement of the global magnetic anisotropy caused by exchange bias and dipolar interactions, which enables the thermal stability of the studied small particles up to relatively large temperatures, is reported.

scholarly journals Gas Phase Synthesis of Multi-Element Nanoparticles

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2803
Author(s):  
Raúl López-Martín ◽  
Benito Santos Burgos ◽  
Peter S. Normile ◽  
José A. De Toro ◽  
Chris Binns
Keyword(s):  
Gas Phase ◽  
Size Control ◽  
Core Shell ◽  
Core Size ◽  
Solid Materials ◽  
Phase Synthesis ◽  
Synthesis Of Nanoparticles ◽  
Gas Phase Synthesis ◽  
Material Choice ◽  
Shell Particles

The advantages of gas-phase synthesis of nanoparticles in terms of size control and flexibility in choice of materials is well known. There is increasing interest in synthesizing multi-element nanoparticles in order to optimize their performance in specific applications, and here, the flexibility of material choice is a key advantage. Mixtures of almost any solid materials can be manufactured and in the case of core–shell particles, there is independent control over core size and shell thickness. This review presents different methods of producing multi-element nanoparticles, including the use of multiple targets, alloy targets and in-line deposition methods to coat pre-formed cores. It also discusses the factors that produce alloy, core–shell or Janus morphologies and what is possible or not to synthesize. Some applications of multi-element nanoparticles in medicine will be described.

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