{"title":"Size effect on Debye temperature of metal crystals","authors":"Xiaobao Jiang, Hongchao Sheng and Beibei Xiao","doi":"10.1039/D3CP04236G","DOIUrl":null,"url":null,"abstract":"<p >Understanding the physical origin of materials exhibiting different properties at the mesoscale is of great significance for the design and fabrication of multifunctional quantum devices. In this work, we proposed a simple model without any adjustable parameters to describe the size (<em>D</em>) dependence of Debye temperature <em>Θ</em><small><sub>D</sub></small>(<em>D</em>) of metallic nanocrystals. <em>Θ</em><small><sub>D</sub></small>(<em>D</em>) drops with the decrease of <em>D</em>, which is verified by relevant experimental and simulation results. In addition, we found that the difference in the size dependence of <em>Θ</em><small><sub>D</sub></small>(<em>D</em>) of different metal elements is determined by the ratio of the solid/liquid interface energy <em>γ</em><small><sub>sl</sub></small> and surface stress <em>f</em>, and the smaller the <em>D</em> of the nanocrystals, the greater the influence of <em>γ</em><small><sub>sl</sub></small>/<em>f</em> on <em>Θ</em><small><sub>D</sub></small>(<em>D</em>)<em>/Θ</em><small><sub>D</sub></small>.</p>","PeriodicalId":99,"journal":{"name":"Physical Chemistry Chemical Physics","volume":" 42","pages":" 29310-29314"},"PeriodicalIF":2.9000,"publicationDate":"2023-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physical Chemistry Chemical Physics","FirstCategoryId":"92","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2023/cp/d3cp04236g","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
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Abstract
Understanding the physical origin of materials exhibiting different properties at the mesoscale is of great significance for the design and fabrication of multifunctional quantum devices. In this work, we proposed a simple model without any adjustable parameters to describe the size (D) dependence of Debye temperature ΘD(D) of metallic nanocrystals. ΘD(D) drops with the decrease of D, which is verified by relevant experimental and simulation results. In addition, we found that the difference in the size dependence of ΘD(D) of different metal elements is determined by the ratio of the solid/liquid interface energy γsl and surface stress f, and the smaller the D of the nanocrystals, the greater the influence of γsl/f on ΘD(D)/ΘD.
期刊介绍：
Physical Chemistry Chemical Physics (PCCP) is an international journal co-owned by 19 physical chemistry and physics societies from around the world. This journal publishes original, cutting-edge research in physical chemistry, chemical physics and biophysical chemistry. To be suitable for publication in PCCP, articles must include significant innovation and/or insight into physical chemistry; this is the most important criterion that reviewers and Editors will judge against when evaluating submissions.
The journal has a broad scope and welcomes contributions spanning experiment, theory, computation and data science. Topical coverage includes spectroscopy, dynamics, kinetics, statistical mechanics, thermodynamics, electrochemistry, catalysis, surface science, quantum mechanics, quantum computing and machine learning. Interdisciplinary research areas such as polymers and soft matter, materials, nanoscience, energy, surfaces/interfaces, and biophysical chemistry are welcomed if they demonstrate significant innovation and/or insight into physical chemistry. Joined experimental/theoretical studies are particularly appreciated when complementary and based on up-to-date approaches.
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