Single-Layer Single-Crystalline SnSe Nanosheets

Li, Lun; Chen, Zhong; Hu, Ying; Wang, Xuewen; Zhang, Ting; Chen, Wei; Wang, Qiangbin

doi:10.1021/ja3108017

Cited by 461 publications

(380 citation statements)

References 32 publications

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“…The onset reduction potential appeared at À0.59 V, as can be envisaged from The reduction potential value was found to shi to À0.45 V in the presence of Li ions due to their intercalation within the SnSe lattice. At this stage, it is being mentioned here that a reduction potential of À0.97 and À0.91 V has been reported for SnSe nanosheets and nanoowers, respectively, as prepared by using oleylamine and 1,10-phenanthroline at 260 C. 32 These values are higher than À1.06 and À1.4 V reported for SnSe nanocrystals.…”

mentioning

confidence: 61%

Aqueous phase one-pot green synthesis of SnSe nanosheets in a protein matrix: negligible cytotoxicity and room temperature emission in the visible region

2015

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In recent times, SnSe has attracted considerable attention as an environmentally friendly alternative to cadmium-and lead-based photovoltaic materials. Herein, we report a rapid, facile, reproducible, and purely green method for the synthesis of SnSe nanosheets (NS) in an aqueous solution of bovine serum albumin (BSA). Interestingly, BSA itself acted as a reducing agent, stabilizing agent and shape directing template. Time dependent TEM imaging showed the self-assembly of the nanoparticles (NPs) into single crystalline NS. A probable mechanism has been proposed on the basis of the alteration of the intrinsic a-helix structure of BSA into b-pleated sheets at the pH ($3.0) of the reaction mixture. This directs the self-assembly of small SnSe NPs into the NS like structure. It was further evident that the -NH and the -S-S-linkages in the protein are involved in the functionalization of the NPs. As grown SnSe nanomaterial was found to display room temperature photoluminescence (PL), which has been rarely reported. The PL spectra appeared to be the convolution of two bands at 425 and 470 nm, which were attributed to the band-gap and trap/surface state emission, respectively. Moreover, the reduction potential values obtained from the cyclic voltammetry indicate better thermodynamic feasibility for the reduction of SnSe, while the cytotoxicity studies revealed no toxic effects up to a concentration of 100 mM. This signifies the potential application of these nanomaterials in photovoltaics and biomedical contexts.

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mentioning

confidence: 61%

Aqueous phase one-pot green synthesis of SnSe nanosheets in a protein matrix: negligible cytotoxicity and room temperature emission in the visible region

2015

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“…In general, GIVMCs have been classified into two groups according to their chemical compositions: MX (SiC,89 SiS,90 GeS,91, 92 GeSe,93, 94, 95, 96 SnS,97, 98, 99 SnSe,100, 101, 102, 103, 104, 105, 106, 107, 108 SnTe,109, 110) and MX 2 (GeS 2 ,111 GeSe 2 ,112, 113, 114, 115 SnS 2 ,72, 116, 117, 118 SnSe 2 73, 119, 120, 121, 122, 123, 124, 125). In this part, some typical GIVMCs are presented in Table 1 .…”

Section: Crystal Structuresmentioning

confidence: 99%

Booming Development of Group IV–VI Semiconductors: Fresh Blood of 2D Family

et al. 2016

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As an important component of 2D layered materials (2DLMs), the 2D group IV metal chalcogenides (GIVMCs) have drawn much attention recently due to their earth‐abundant, low‐cost, and environmentally friendly characteristics, thus catering well to the sustainable electronics and optoelectronics applications. In this instructive review, the booming research advancements of 2D GIVMCs in the last few years have been presented. First, the unique crystal and electronic structures are introduced, suggesting novel physical properties. Then the various methods adopted for synthesis of 2D GIVMCs are summarized such as mechanical exfoliation, solvothermal method, and vapor deposition. Furthermore, the review focuses on the applications in field effect transistors and photodetectors based on 2D GIVMCs, and extends to flexible devices. Additionally, the 2D GIVMCs based ternary alloys and heterostructures have also been presented, as well as the applications in electronics and optoelectronics. Finally, the conclusion and outlook have also been presented in the end of the review.

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“…Monolayers of layered orthorhombic materials [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] can become disordered at room temperature.…”

Section: Introductionmentioning

confidence: 99%

Two-Dimensional Disorder in Black Phosphorus and Monochalcogenide Monolayers

et al. 2016

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Ridged, orthorhombic two-dimensional atomic crystals with a bulk Pnma structure such as black phosphorus and monochalcogenide monolayers are an exciting and novel material platform for a host of applications. Key to their crystallinity, monolayers of these materials have a four-fold degenerate structural ground state, and a single energy scale E C (representing the * To whom correspondence should be addressed † Department of Physics. elastic energy required to switch the longer lattice vector along the x− or y−direction) determines how disordered these monolayers are at finite temperature. Disorder arises when nearest neighboring atoms become gently reassigned as the system is thermally excited beyond a critical temperature T c that is proportional to E C /k B . E C is tunable by chemical composition and it leads to a classification of these materials into two categories: (i) Those for which E C ≥ k B T m , and (ii) those having k B T m > E C ≥ 0, where T m is a given material's melting temperature. Black phosphorus and SiS monolayers belong to category (i): these materials do not display an intermediate order-disorder transition and melt directly. All other monochalcogenide monolayers with E C > 0 belonging to class (ii) will undergo a two-dimensional transition prior to melting. E C /k B is slightly larger than room temperature for GeS and GeSe, and smaller than 300 K for SnS and SnSe monolayers, so that these materials transition near room temperature. The onset of this generic atomistic phenomena is captured by a planar Potts model up to the orderdisorder transition. The order-disorder phase transition in two dimensions described here is at the origin of the Cmcm phase being discussed within the context of bulk layered SnSe.

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Single-Layer Single-Crystalline SnSe Nanosheets

Cited by 461 publications

References 32 publications

Aqueous phase one-pot green synthesis of SnSe nanosheets in a protein matrix: negligible cytotoxicity and room temperature emission in the visible region

Aqueous phase one-pot green synthesis of SnSe nanosheets in a protein matrix: negligible cytotoxicity and room temperature emission in the visible region

Booming Development of Group IV–VI Semiconductors: Fresh Blood of 2D Family

Two-Dimensional Disorder in Black Phosphorus and Monochalcogenide Monolayers

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