Nanoscale Behavior and Manipulation of the Phase Transition in Single-Crystal Cu2Se

doi:10.1002/adma.201804919

	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
刊名	ADVANCED MATERIALS
	2019-01-25
卷号	31 期号:4
关键词	Cu2Se in situ transmission electron microscopy second-order phase transitions
ISSN号	0935-9648
DOI	10.1002/adma.201804919
文献子类	Article
英文摘要	Phase 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.
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	WILEY-V C H VERLAG GMBH
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/27383]
专题	中国科学院上海硅酸盐研究所
推荐引用方式 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).