Size-dependent solid-solid phase transition process of Ag2S nanoparticles

Size-dependent solid-solid phase transition process of Ag2S nanoparticles

It is well known that for a nanoparticle the solid-solid phase transition begins with the appearance of a high temperature disordered phase at the surface and the phase interface moves inward gradually with the increase of temperature. However, the size-dependent phase transition behavior remains un...

Full description

Bibliographic Details
Main Authors: Jun Liu, Lu Chen, Hangsheng Yang, Ze Zhang, Yong Wang
Format: Article
Language:English
Published: Elsevier 2019-08-01
Series:Progress in Natural Science: Materials International
Online Access:http://www.sciencedirect.com/science/article/pii/S1002007118308608
id doaj-ac4a8aa1e2d04346ad59bf90973d5f32
record_format Article
spelling doaj-ac4a8aa1e2d04346ad59bf90973d5f322020-11-25T02:39:31ZengElsevierProgress in Natural Science: Materials International1002-00712019-08-01294397401Size-dependent solid-solid phase transition process of Ag2S nanoparticlesJun Liu0Lu Chen1Hangsheng Yang2Ze Zhang3Yong Wang4State Key Laboratory of Silicon Materials and Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, ChinaState Key Laboratory of Silicon Materials and Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, ChinaState Key Laboratory of Silicon Materials and Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, ChinaState Key Laboratory of Silicon Materials and Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, ChinaCorresponding author.; State Key Laboratory of Silicon Materials and Center of Electron Microscopy, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, ChinaIt is well known that for a nanoparticle the solid-solid phase transition begins with the appearance of a high temperature disordered phase at the surface and the phase interface moves inward gradually with the increase of temperature. However, the size-dependent phase transition behavior remains unclear. Here we report an in-situ TEM study of the phase transition process of different-sized Ag2S nanoparticles at atomic resolution. The onset temperature of disordered phase of the small nanoparticle is found to be lower than that of the big nanoparticle. And, the disordered phase thickness of small nanoparticle is always thicker than that of big nanoparticle. By considering surface and interface free-energy, a phenomenological model based on the minimization of system free-energy is established, which could well explain our experimental results. These discoveries extend our understanding of size dependent phase transition mechanism. Keywords: Solid-solid phase transition, Nanoparticles, In-situ transmission electron microscopy, Ag2Shttp://www.sciencedirect.com/science/article/pii/S1002007118308608
collection DOAJ
language English
format Article
sources DOAJ
author Jun Liu
Lu Chen
Hangsheng Yang
Ze Zhang
Yong Wang
spellingShingle Jun Liu
Lu Chen
Hangsheng Yang
Ze Zhang
Yong Wang
Size-dependent solid-solid phase transition process of Ag2S nanoparticles
Progress in Natural Science: Materials International
author_facet Jun Liu
Lu Chen
Hangsheng Yang
Ze Zhang
Yong Wang
author_sort Jun Liu
title Size-dependent solid-solid phase transition process of Ag2S nanoparticles
title_short Size-dependent solid-solid phase transition process of Ag2S nanoparticles
title_full Size-dependent solid-solid phase transition process of Ag2S nanoparticles
title_fullStr Size-dependent solid-solid phase transition process of Ag2S nanoparticles
title_full_unstemmed Size-dependent solid-solid phase transition process of Ag2S nanoparticles
title_sort size-dependent solid-solid phase transition process of ag2s nanoparticles
publisher Elsevier
series Progress in Natural Science: Materials International
issn 1002-0071
publishDate 2019-08-01
description It is well known that for a nanoparticle the solid-solid phase transition begins with the appearance of a high temperature disordered phase at the surface and the phase interface moves inward gradually with the increase of temperature. However, the size-dependent phase transition behavior remains unclear. Here we report an in-situ TEM study of the phase transition process of different-sized Ag2S nanoparticles at atomic resolution. The onset temperature of disordered phase of the small nanoparticle is found to be lower than that of the big nanoparticle. And, the disordered phase thickness of small nanoparticle is always thicker than that of big nanoparticle. By considering surface and interface free-energy, a phenomenological model based on the minimization of system free-energy is established, which could well explain our experimental results. These discoveries extend our understanding of size dependent phase transition mechanism. Keywords: Solid-solid phase transition, Nanoparticles, In-situ transmission electron microscopy, Ag2S
url http://www.sciencedirect.com/science/article/pii/S1002007118308608
work_keys_str_mv AT junliu sizedependentsolidsolidphasetransitionprocessofag2snanoparticles
AT luchen sizedependentsolidsolidphasetransitionprocessofag2snanoparticles
AT hangshengyang sizedependentsolidsolidphasetransitionprocessofag2snanoparticles
AT zezhang sizedependentsolidsolidphasetransitionprocessofag2snanoparticles
AT yongwang sizedependentsolidsolidphasetransitionprocessofag2snanoparticles
_version_ 1724785617971183616

Similar Items