Synthesis of ultrathin wurtzite ZnSe nanosheets

Park, Heeyeon; Chung, Haegeun; Kim, Woong

doi:10.1016/j.matlet.2013.03.038

Cited by 40 publications

(64 citation statements)

References 21 publications

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“…Park et al achieved successful synthesis of 1.4-nm-thick ZnSe nanosheets with wurtzite structure. 26 Using a colloidal template method large-scale fabrication of free-standing ultra-thin and lamellar-structured CdSe with wurtzite crystal structure was achieved. 27 Furthermore, using a lamellar hybrid intermediate, large-area, free-standing, single-layers of ZnSe were fabricated.…”

Section: 2324mentioning

confidence: 99%

Stable ultra-thin CdTe crystal: a robust direct gap semiconductor

İyikanat

Akbalı

Kang

et al. 2017

J. Phys.: Condens. Matter

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Employing density functional theory based calculations, we investigate structural, vibrational and strain-dependent electronic properties of an ultra-thin CdTe crystal structure that can be derived from its bulk counterpart. It is found that this ultra-thin crystal has an 8-atom primitive unit cell with considerable surface reconstructions. Dynamic stability of the structure is predicted based on its calculated vibrational spectrum. Electronic band structure calculations reveal that both electrons and holes in single layer CdTe possess anisotropic in-plane masses and mobilities.Moreover, we show that the ultra-thin CdTe has some interesting electromechanical features, such as strain-dependent anisotropic variation of the band gap value, and its rapid increase under perpendicular compression. The direct band gap semiconducting nature of the ultra-thin CdTe crystal remains unchanged under all types of applied strain. With a robust and moderate direct band gap, single-layer CdTe is a promising material for nanoscale strain dependent device applications.

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Section: 2324mentioning

confidence: 99%

Stable ultra-thin CdTe crystal: a robust direct gap semiconductor

İyikanat

Akbalı

Kang

et al. 2017

J. Phys.: Condens. Matter

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“…49 Importantly, the shape control of Zn-based NCs has extended beyond spherical QDs to 1D quantum rods [82][83][84][85] and 2D nanosheets. 86,87 In the former case, ZnSe, ZnS and ZnTe rods with controllable aspect ratios have been synthesized using a phosphine-free technique via a ripening process through thermodynamically driven material diffusion. 82 ZnSe/ZnS dotin-rods 88 and ZnS and ZnSe/ZnS core-shell NPLs 89 have been synthesized with absorption and emission in the UV-blue via cation exchange, a reaction that replaces cations within an NC lattice with those in solution.…”

Section: Synthesis Of Non-toxic Alternativesmentioning

confidence: 99%

“…258 With regard to this third strategy, synthesis procedures have begun to develop for nanosheets of non-toxic materials such as Zn(S, Se, Te), which would form attractive new materials. 86 There are interesting prospects for sustainable, solution processed NCs in future quantum technologies, bolstered by the knowledge gained on CdSe NCs. With maturing syntheses of green materials, the strategies already developed for CdSe NCs should accelerate their role in the future of quantum computing and communication.…”

Section: Sustainable Future Quantum Technology With Colloidal Ncsmentioning

confidence: 99%

A sustainable future for photonic colloidal nanocrystals

2015

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Colloidal nanocrystals - produced in a growing variety of shapes, sizes and compositions - are rapidly developing into a new generation of photonic materials, spanning light emitting as well as energy harvesting applications. Precise tailoring of their optoelectronic properties enables them to satisfy disparate application-specific requirements. However, the presence of toxic heavy metals such as cadmium and lead in some of the most mature nanocrystals is a serious drawback which may ultimately preclude their use in consumer applications. Although the pursuit of non-toxic alternatives has occurred in parallel to the well-developed Cd- and Pb-based nanocrystals, synthetic challenges have, until recently, curbed progress. In this review, we highlight recent advances in the development of heavy-metal-free nanocrystals within the context of specific photonic applications. We also describe strategies to transfer some of the advantageous nanocrystal features such as shape control to non-toxic materials. Finally, we present recent developments that have the potential to make substantial impacts on the quest to attain a balance between performance and sustainability in photonics.

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“…The ultrathin nanocrystals in the TEM images were colored to enhance the contrast with the background. The panels were adapted with permission from refs ( 24 ) (panel A; Copyright 2013 American Chemical Society), ( 34 ) (panel B; Copyright 2007 Royal Society of Chemistry), ( 35 ) (panel C; Copyright 2013 American Chemical Society), ( 39 ) (panel D; Copyright 2014 American Chemical Society), ( 25 ) (panel E; Copyright 2012 WILEY-VCH), ( 41 ) (panel F; Copyright 2016 American Chemical Society), ( 27 ) (panel G; Copyright 2013 Elsevier), and ( 40 ) (panel H; Copyright 2016 American Chemical Society).…”

mentioning

confidence: 99%

Ultrathin One- and Two-Dimensional Colloidal Semiconductor Nanocrystals: Pushing Quantum Confinement to the Limit

Berends

Donegá

2017

J. Phys. Chem. Lett.

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Research on ultrathin nanomaterials is one of the fastest developing areas in contemporary nanoscience. The field of ultrathin one- (1D) and two-dimensional (2D) colloidal nanocrystals (NCs) is still in its infancy, but offers the prospect of production of ultrathin nanomaterials in liquid-phase at relatively low costs, with versatility in terms of composition, size, shape, and surface control. In this Perspective, the state of the art in the field is concisely outlined and critically discussed to highlight the essential concepts and challenges. We start by presenting a brief overview of the ultrathin colloidal 1D and 2D semiconductor NCs prepared to date, after which the synthesis strategies and formation mechanisms of both 1D and 2D NCs are discussed. The properties of these low-dimensional materials are then reviewed, with emphasis on the optical properties of luminescent NCs. Finally, the future prospects for the field are addressed.

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Synthesis of ultrathin wurtzite ZnSe nanosheets

Cited by 40 publications

References 21 publications

Stable ultra-thin CdTe crystal: a robust direct gap semiconductor

Stable ultra-thin CdTe crystal: a robust direct gap semiconductor

A sustainable future for photonic colloidal nanocrystals

Ultrathin One- and Two-Dimensional Colloidal Semiconductor Nanocrystals: Pushing Quantum Confinement to the Limit

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