scholarly journals Formation and Evolution Characteristics of Nano-Clusters (For Large-Scale Systems of 106 Liquid Metal Atoms)

10.5772/34986 ◽  
2012 ◽  
Author(s):  
Rang-su Liu ◽  
Hai-rong Liu ◽  
Ze-an Tian ◽  
Li-li Zhou ◽  
Qun-yi Zhou
Keyword(s):  
Liquid Metal ◽  
Large Scale ◽  
Large Scale Systems ◽  
Metal Atoms ◽  
Evolution Characteristics ◽  
Formation And Evolution

Evolution Mechanisms of Nano-Clusters in a Large-Scale System of 106 Liquid Metal Atoms During Rapid Cooling Processes

2007 ◽  
Vol 121-123 ◽  
pp. 1049-1052
Author(s):  
Rang Su Liu ◽  
Z.A. Tian ◽  
X.H. Yi ◽  
H.R. Liu ◽  
P. Peng
Keyword(s):  
Liquid Metal ◽  
Large Scale ◽  
Critical Role ◽  
Dynamics Simulation ◽  
Index Method ◽  
Evolution Characteristics ◽  
Icosahedral Clusters ◽  
Solidification Processes ◽  
Structural Configurations ◽  
Nano Cluster

A molecular dynamics simulation study has been performed for a large-sized system consisting of 106 liquid metal Al atoms to investigate the evolution characteristics of nano-clusters formed during rapid solidification processes. The cluster-type index method (CTIM) has been applied to describe the structural configurations of the basic clusters and nano-clusters. The results show that the icosahedral clusters (12 0 12 0) and their combinations play a critical role in the microstructural transitions. The nano-clusters are mainly formed by combining basic and medium sized clusters through continuous evolution. Their structural configurations are different from the multi-shell structures obtained by gaseous deposition, ionic spray, and so on. The central atoms of basic clusters composing the nano-cluster are bonded with each other, some central atoms are multi-bonded, and others single-bonded.

Decoupling of Large Scale Systems

1984 ◽  
Author(s):  
Dipak C. Shah ◽  
Mahmoud E. Sawan ◽  
Minh T. Tran
Keyword(s):  
Large Scale ◽  
Large Scale Systems

Covalent Atomic Bridges Enable Unidirectional Enhancement of Electronic Transport in Aligned Carbon Nanotubes

2019 ◽  
Author(s):  
Mingguang Chen ◽  
Wangxiang Li ◽  
Anshuman Kumar ◽  
Guanghui Li ◽  
Mikhail Itkis ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Transport ◽  
Large Scale ◽  
The Novel ◽  
Electrical Measurements ◽  
Metal Atoms ◽  
Aligned Carbon Nanotubes ◽  
Transport Channels ◽  
Walled Carbon Nanotubes ◽  
Bulk Structures

<p>Interconnecting the surfaces of nanomaterials without compromising their outstanding mechanical, thermal, and electronic properties is critical in the design of advanced bulk structures that still preserve the novel properties of their nanoscale constituents. As such, bridging the p-conjugated carbon surfaces of single-walled carbon nanotubes (SWNTs) has special implications in next-generation electronics. This study presents a rational path towards improvement of the electrical transport in aligned semiconducting SWNT films by deposition of metal atoms. The formation of conducting Cr-mediated pathways between the parallel SWNTs increases the transverse (intertube) conductance, while having negligible effect on the parallel (intratube) transport. In contrast, doping with Li has a predominant effect on the intratube electrical transport of aligned SWNT films. Large-scale first-principles calculations of electrical transport on aligned SWNTs show good agreement with the experimental electrical measurements and provide insight into the changes that different metal atoms exert on the density of states near the Fermi level of the SWNTs and the formation of transport channels. </p>

Sign in / Sign up

Export Citation Format

Share Document