Understanding the Epitaxial Growth of SexTey@Te Core−Shell Nanorods and the Generation of Periodic Defects

Moon, Geon Dae; Min, Yuho; Ko, Sungwook; Kim, Sun Wook; Ko, Dae Hong; Jeong, Unyong

doi:10.1021/nn102196r

Cited by 13 publications

(17 citation statements)

References 41 publications

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“…For the synthesis of high-quality 1D metal chalcogenide nanostructures through a CT process, high-quality 1D chalcogen nanostructures are imperatively desired. Although highly uniform Te ( 31 , 32 ) and Se ( 33 , 34 ) nanowires have been obtained through various procedures, very few reports on the synthesis of Te/Se alloy ( 35 ) or hybrid ( 36 , 37 ) nanowires can be found in the literature, probably on account of their relatively large differences in chemical properties.…”

Section: Introductionmentioning

confidence: 99%

A new generation of alloyed/multimetal chalcogenide nanowires by chemical transformation

et al. 2015

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Section: Introductionmentioning

confidence: 99%

A new generation of alloyed/multimetal chalcogenide nanowires by chemical transformation

et al. 2015

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“…Se and Te are both elements of the sixth main group and possess six outer electrons in the 5s 2 5p 4 configuration. Both Se/Te alloyed and heterogeneous nanostructures have been reported previously ( Figure ) . For example, the 2G alloyed Te x Se y NWs were obtained by incorporating Se atoms into the 1G Te NWs .…”

Section: G Te Nws and The Derived 1d Nanostructuresmentioning

confidence: 78%

Nanowire Genome: A Magic Toolbox for 1D Nanostructures

Yang

Liang

et al. 2019

Advanced Materials

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1D nanomaterials with high aspect ratio, i.e., nanowires and nanotubes, have inspired considerable research interest thanks to the fact that exotic physical and chemical properties emerge as their diameters approach or fall into certain length scales, such as the wavelength of light, the mean free path of phonons, the exciton Bohr radius, the critical size of magnetic domains, and the exciton diffusion length. On the basis of their components, aspect ratio, and properties, there may be imperceptible connections among hundreds of nanowires prepared by different strategies. Inspired by the heredity system in life, a new concept termed the “nanowire genome” is introduced here to clarify the relationships between hundreds of nanowires reported previously. As such, this approach will not only improve the tools incorporating the prior nanowires but also help to precisely synthesize new nanowires and even assist in the prediction on the properties of nanowires. Although the road from start‐ups to maturity is long and fraught with challenges, the genetical syntheses of more than 200 kinds of nanostructures stemming from three mother nanowires (Te, Ag, and Cu) are summarized here to demonstrate the nanowire genome as a versatile toolbox. A summary and outlook on future challenges in this field are also presented.

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“…While the extension of the axial direction of the nanorods is promoted by the formation of chemical bonds, the growth along the radial direction is promoted by the weak interaction between strands; hence, it forms 1D structures inherently by selective atomic adsorption. 30 Both…”

Section: Surface Energy Modulation By Se Dopingmentioning

confidence: 99%

The effect of Se doping on the growth of Te nanorods

et al. 2015

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In this study, we successfully conducted a series of computationally-assisted experiments, regarding the morphology control and chemical transformation of Te nanorods. The morphology of Te nanorods is controlled by introducing a minute amount of isovalent Se dopant. Density-functional theory calculations predicted the Gibbs surface free energy change due to the adsorbent Se on the major facets of Te nanorods.Encouraged by the theoretical prediction, we conducted experiments on Te nanorod growth and did find significant variation of the morphology of Te nanorods due to Se injection. Furthermore, we demonstrated the chemical transformation of the shape-controlled Te nanorods to binary thermoelectric compounds such as PbTe and Bi 2 Te 3 without losing the tailored morphology. The transformed PbTe and Bi 2 Te 3 have nanoscale grain boundaries as seen from the cross-section HRTEM image. We emphasize that the robust production of morphology-controlled thermoelectric nanorods can be an optimal approach to develop an advanced thermoelectric composite material, by which the multiscale phonon scattering effect can be maximized.

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Understanding the Epitaxial Growth of Se_xTe_y@Te Core−Shell Nanorods and the Generation of Periodic Defects

Cited by 13 publications

References 41 publications

A new generation of alloyed/multimetal chalcogenide nanowires by chemical transformation

A new generation of alloyed/multimetal chalcogenide nanowires by chemical transformation

Nanowire Genome: A Magic Toolbox for 1D Nanostructures

The effect of Se doping on the growth of Te nanorods

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