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Kang, Kai; Qin, Shaojing; Wang, Chuilin; Kang, K , Peking Univ, Sch Phys, Beijing 100871, Peoples R China
Size-dependent melting: Numerical calculations of the phonon spectrum
Source PublicationPHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
KeywordSmall Particles Metallic Nanoparticles Nanocrystalline Ni3fe Cohesive Energy Heat-capacities Temperature Thermodynamics Nanoclusters Point
AbstractIn order to clarify the relationship between the phonon spectra of nanoparticles and their melting temperature, we Studied in detail the size-dependent low energy vibration modes. A minimum model with atoms on a lattice and harmonic potentials for neighboring atoms is used to reveal a general behavior. By calculating the phonon spectra for a series of nanoparticles of two lattice types in different sizes, we found that density of low energy modes increases as the size of nanoparticles decreases, and this density increase causes decrease in melting temperature. And we obtained the linear depression of nanoparticle melting temperature with decreasing size. Size-dependent behavior of the phonon spectra accounts for typical properties of surface-premelting and irregular melting temperature on fine scales. These results show that our microscopic model captures the main physics of nanoparticles. (C) 2009 Elsevier B.V. All rights reserved.
2009
ISSN1386-9477
Volume41Issue:5Pages:817-821
Subject AreaPhysics
Indexed BySCI
Funding OrganizationNational Natural Science Foundation of China; MOST of China; Chinese Academy of Sciences ; National Natural Science Foundation of China; MOST of China; Chinese Academy of Sciences ; National Natural Science Foundation of China; MOST of China; Chinese Academy of Sciences ; National Natural Science Foundation of China; MOST of China; Chinese Academy of Sciences
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Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/5370
Collection理论物理所科研产出_SCI论文
Corresponding AuthorKang, K , Peking Univ, Sch Phys, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Kang, Kai,Qin, Shaojing,Wang, Chuilin,et al. Size-dependent melting: Numerical calculations of the phonon spectrum[J]. PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES,2009,41(5):817-821.
APA Kang, Kai,Qin, Shaojing,Wang, Chuilin,&Kang, K , Peking Univ, Sch Phys, Beijing 100871, Peoples R China.(2009).Size-dependent melting: Numerical calculations of the phonon spectrum.PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES,41(5),817-821.
MLA Kang, Kai,et al."Size-dependent melting: Numerical calculations of the phonon spectrum".PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES 41.5(2009):817-821.
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