Thermodynamics at the nanoscale: A new approach to the investigation of unique physicochemical properties of nanomaterials

Chun Cheng Yang, Yiu Wing Mai

Research output: Journal article publicationReview articleAcademic researchpeer-review

141 Citations (Scopus)

Abstract

An extension of the classic thermodynamics theory to nanometer scale has generated a new interdisciplinary theory - nanothermodynamics. It serves as a bridge between macroscopic and nanoscopic systems. Over the past decade, nanothermodynamics theories have developed rapidly owing to their critical role in investigating the size-dependent physicochemical properties of nanomaterials. This review examines up-to-date research results on this cutting-edge topic. The focus and emphasis are on the utilization of nanothermodynamics models to investigate the size-dependent thermal stability, magnetic properties, photoelectric behaviors, thermoelectric phenomena, mechanical properties, electrical properties, etc. of nanomaterials. A range of properties have been studied with respect to the effects of size, dimensionality and composition through a quantitative nanothermodynamics model. It is found that (a) the size dependence of these properties can be universally reconciled to the effect of severe bond dangling; (b) for the same material size, the sequence of size effects on the properties, from strong to weak, is nanoparticles, nanowires and thin films; and (c) the composition effects on the properties of nanoalloys are substantial, having a nonlinear relationship. It also reveals that vacancy formation determined by the cohesive energy variation is one of the intrinsic factors which dominate the size-dependent physicochemical properties of nanomaterials.

Original languageEnglish
Pages (from-to)1-40
Number of pages40
JournalMaterials Science and Engineering R: Reports
Volume79
Issue number1
DOIs
Publication statusPublished - May 2014
Externally publishedYes

Keywords

  • Magnetic properties
  • Nanomaterials
  • Nanothermodynamics
  • Photoelectric behaviors
  • Thermal stability
  • Thermoelectricity

ASJC Scopus subject areas

  • General Materials Science
  • Mechanics of Materials
  • Mechanical Engineering

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