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Nanoscale Behavior and Manipulation of the Phase Transition in Single-Crystal Cu2Se
Chen, Lu; Liu, Jun; Jiang, Chao; Zhao, Kunpeng; Chen, Hongyi; Shi, Xun; Chen, Lidong; Sun, Chenghua; Zhang, Shengbai; Wang, Yong; Zhang, Ze
2019-01-25
Source PublicationADVANCED MATERIALS
ISSN0935-9648
Volume31Issue:4
SubtypeArticle
AbstractPhase transition is a fundamental physical phenomenon that has been widely studied both theoretically and experimentally. According to the Landau theory, the coexistence of high- and low-temperature phases is thermodynamically impossible during a second-order phase transition in a bulk single crystal. Here, the coexistence of two (alpha and beta) phases in wedge-shaped nanosized single-crystal Cu2Se over a large temperature range are demonstrated. By considering the surface free-energy difference between the two phases and the shape effect, a thermodynamic model is established, which explicitly explains their coexistence. Intriguingly, it is found that with a precise control of the heating temperature, the phase boundary can be manipulated at atomic level. These discoveries extend the understanding of phase transitions to the nanoscale and shed light on rational manipulation of phase transitions in nanomaterials.
KeywordCu2Se in situ transmission electron microscopy second-order phase transitions
DOI10.1002/adma.201804919
Language英语
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27383
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Chen, Lu,Liu, Jun,Jiang, Chao,et al. Nanoscale Behavior and Manipulation of the Phase Transition in Single-Crystal Cu2Se[J]. ADVANCED MATERIALS,2019,31(4).
APA Chen, Lu.,Liu, Jun.,Jiang, Chao.,Zhao, Kunpeng.,Chen, Hongyi.,...&Zhang, Ze.(2019).Nanoscale Behavior and Manipulation of the Phase Transition in Single-Crystal Cu2Se.ADVANCED MATERIALS,31(4).
MLA Chen, Lu,et al."Nanoscale Behavior and Manipulation of the Phase Transition in Single-Crystal Cu2Se".ADVANCED MATERIALS 31.4(2019).
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