Thermal stability of Te nanowires and their crystallography-determined surface evolution at elevated temperatures

Shangguan, Lei; Ran, Ya-Ting; Lu, Zi-Yu; Gao, Yu-Tian; Shi, Lei; He, Longbing; Sun, Litao

doi:10.1007/s12274-022-5190-9

Cited by 3 publications

(1 citation statement)

References 38 publications

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“…This is quite different from the type-ii and type-iii nanosheets where the {101̅ 0} surfaces are the outer exposure surfaces. Because the surface energy of the {112̅ 0} free surfaces (∼0.36 J/m 2 ) is significantly higher than that of the {101̅ 0} surfaces (∼0.08 J/ m 2 ), 38,39 this discrepancy in surface energy may be one of the critical influencing factors why such crossed nanowires will not turn into nanosheets. As illustrated in Figure 4c, the priority of exposing low-energy surfaces obviously prefers the prism structure, where the outer surfaces are enclosed with {101̅ 0} surfaces.…”

Section: Resultsmentioning

confidence: 99%

Hydrothermal Synthesis of Te Nanosheets: Growth Mechanism and Electrical Property

Shangguan,

He,

Ran

et al. 2023

ACS Appl. Mater. Interfaces

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Hydrothermal synthesis is a highly efficient way to yield multiform Te nanosheets. However, the growth mechanisms and property discrepancies between different types of Te nanosheets are still unclear. In this paper, we perform an investigation on this issue by monitoring the hydrothermally synthesized Te nanosheets at different growth stages with transmission electron microscopy and electrical tests. Three main types of Te nanosheets and their variants are revealed including trapezoidal and “V”-shaped configurations. It is found that the different types of Te nanosheets dominate at different reaction stages, indicating a sequential growth scenario. Surfactants and surface energy co-determine the growth kinetics, while the crystallographic attachments lead to specifically included angles of 74° and 41° in the “V”-shaped Te nanosheets. The fractions of the three main types of Te nanosheets as a function of reaction time are statistically tracked, and their crystalline structures, interfaces, and preferential growth orientations are uncovered. Moreover, the electrical properties of the Te nanosheets are tested, and the results show an interface-related feature. These findings provide some new insights into the synthesis and property of low-dimensional Te functional materials.

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Section: Resultsmentioning

confidence: 99%

Hydrothermal Synthesis of Te Nanosheets: Growth Mechanism and Electrical Property

Shangguan,

He,

Ran

et al. 2023

ACS Appl. Mater. Interfaces

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Two-dimensional tellurium nanosheet: A novel sensitive and stable surface-enhanced Raman scattering substrate

Liang,

Su,

Wan

et al. 2024

Surfaces and Interfaces

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Photoluminescence properties of two-dimensional semiconductor heterointerfaces

Liu,

Chen,

Chen

et al. 2024

Opt. Express

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Two-dimensional metal-sulfur compounds have attracted much attention due to their novel physical properties, such as layered structure, ultrathin physical dimensions, and continuously tunable bandgap. The vertical stacking of different 2D semiconductors enables the heterojunction to retain the excellent properties of its constituent materials and has physical properties such as interlayer energy transfer and interlayer carrier transfer. In this paper, we utilize the carrier interlayer transfer properties of p-n heterojunctions and form heterojunctions using p-type Te and PdSe2 prepared with n-type monolayer WS2 using the microzone transfer technique. We found that the PL spectrum of monolayer WS2 is purer after heterojunction formation. The photoluminescence peaks representing exciton recombination are sharper, while the peaks represented by trions almost disappear. These phenomena indicate that we can utilize p-n junctions to capture the PL spectra of excitons in WS2, which is important for the further study of the optical properties of 2D metal-sulfur compounds.

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Thermal stability of Te nanowires and their crystallography-determined surface evolution at elevated temperatures

Cited by 3 publications

References 38 publications

Hydrothermal Synthesis of Te Nanosheets: Growth Mechanism and Electrical Property

Hydrothermal Synthesis of Te Nanosheets: Growth Mechanism and Electrical Property

Two-dimensional tellurium nanosheet: A novel sensitive and stable surface-enhanced Raman scattering substrate

Photoluminescence properties of two-dimensional semiconductor heterointerfaces

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