Electronic properties of monolayer copper selenide with one-dimensional moiré patterns

Niu, Gefei; Lu, Jianchen; Geng, Jianqun; Li, Shicheng; Zhang, Hui; Xiong, Wei; Ruan, Zilin; Zhang, Yong; Fu, Boyu; Gao, Lei; Cai, Jinming

doi:10.1007/s11467-022-1211-0

Cited by 3 publications

(2 citation statements)

References 25 publications

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“…We discussed the effect of shape and shape uniformity on structural stability. Understanding the phase behavior in copper selenides is essential for unlocking their full potential in their future applications , considering that several phases of chalcogenides (e.g., silver, bismuth, and antimony selenides and tellurides, etc.) exhibited three-dimensional topological insulating , properties.…”

Section: Cer In Faceted Cdse Ncs Under Anaerobic Conditions With Cu(i...mentioning

confidence: 99%

Compressibility Studies of Copper Selenides Obtained by Cation Exchange Reaction Revealing the New CsCl Phase

Banerjee,

Prakapenka,

Chariton

et al. 2024

Nano Lett.

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In this study, we conducted a high-pressure investigation of Cu 2−x Se nanostructures with pyramid-and plate-like morphologies, created through cation exchange from zinc-blende CdSe nanocrystals and wurtzite CdSe nanoplatelets respectively. Using a diamond anvil cell setup at the APS synchrotron, we observed the phase transitions in the Cu 2−x Se nanostructures up to 40 GPa, identifying a novel CsCl-type lattice with Pm3̅ m symmetry above 4 GPa. This CsCl-type structure, previously unreported in copper selenides, was partially retained after decompression. Our results indicate that the initial crystalline structure of CdSe does not affect the stability of Cu 2−x Se nanostructures formed via cation exchange. Both morphologies of Cu 2−x Se sintered under compression, potentially contributing to the stabilization of the high-pressure phase through interfacial defects. These findings are significant for discovering new phases with potential applications in future technologies.

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Section: Cer In Faceted Cdse Ncs Under Anaerobic Conditions With Cu(i...mentioning

confidence: 99%

Compressibility Studies of Copper Selenides Obtained by Cation Exchange Reaction Revealing the New CsCl Phase

Banerjee,

Prakapenka,

Chariton

et al. 2024

Nano Lett.

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show abstract

“…We discussed the effect of shape and shape uniformity on structural stability. Understanding the phase behavior in copper selenides is essential for unlocking their full potential in their future applications 16,39 considering that several phases of chalcogenides (e.g. silver, bismuth and antimony selenides and tellurides, etc.)…”

Section: Introductionmentioning

confidence: 99%

Compressibility Studies of Copper Selenides Obtained by Cation Exchange Reaction Revealing the New CsCl Phase

Banerjee,

Prakapenka,

Chariton

et al. 2023

Preprint

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In this study, we performed a detailed high-pressure study on Cu2-xSe nanostructures created through cation exchange reactions from CdSe nanocrystals (NCs). These structures exhibited two shapes: zinc blende faceted NCs and wurtzite nanoplatelets (NPLs). Using the diamond anvil cell technique, we examined the phase transitions of Cu2-xSe NCs, particularly the B1 phase with Fm-3m symmetry, under pressures up to 40 GPa. We discovered unique structural changes in Cu2-xSe NCs, different from those in zinc blende CdSe NCs and bulk Cu2-xSe. A novel CsCl-type lattice (B2 phase) with Pm-3m symmetry was observed above 4 GPa, a phase not previously seen experimentally in copper selenides. This CsCl-type lattice showed partial retention after decompression. We also explored how the shape and uniformity of these nanostructures affect their structural stability. This insight into copper selenides' phase behavior is crucial for future applications, and the discovery of a new phase in copper selenide marks a significant advancement in the exploration of novel material phases with potentially unique properties.

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Recent advances in synthesis methods and surface structure manipulating strategies of copper selenide (CuSe) nanoparticles for photocatalytic environmental and energy applications

Chawla,

Sudhaik,

Sonu

et al. 2024

Journal of Environmental Chemical Engineering

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Electronic properties of monolayer copper selenide with one-dimensional moiré patterns

Cited by 3 publications

References 25 publications

Compressibility Studies of Copper Selenides Obtained by Cation Exchange Reaction Revealing the New CsCl Phase

Compressibility Studies of Copper Selenides Obtained by Cation Exchange Reaction Revealing the New CsCl Phase

Compressibility Studies of Copper Selenides Obtained by Cation Exchange Reaction Revealing the New CsCl Phase

Recent advances in synthesis methods and surface structure manipulating strategies of copper selenide (CuSe) nanoparticles for photocatalytic environmental and energy applications

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