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Size-dependent melting: Numerical calculations of the phonon spectrum
Kang, Kai; Qin, Shaojing; Wang, Chuilin; Kang, K , Peking Univ, Sch Phys, Beijing 100871, Peoples R China
2009
发表期刊PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
ISSN1386-9477
卷号41期号:5页码:817-821
摘要In 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.
部门归属[Kang, K] Peking Univ, Sch Phys, Beijing 100871, Peoples R China; [Qin, SJ] Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China; [Wang, CL] China Ctr Adv Sci & Technol, Beijing 100080, Peoples R China
关键词Small Particles Metallic Nanoparticles Nanocrystalline Ni3fe Cohesive Energy Heat-capacities Temperature Thermodynamics Nanoclusters Point
学科领域Physics
资助者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 ; 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 ; 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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资助者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 ; 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 ; 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
WOS记录号WOS:000264967100013
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被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/5370
专题理论物理所SCI论文
通讯作者Kang, K , Peking Univ, Sch Phys, Beijing 100871, Peoples R China
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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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