Growth of CdS nanowire crystals: Vapor–liquid–solid versus vapor–solid mechanisms

Grynko, D.; Fedoryak, Alexander; Dimitriev, Oleg P.; Lin, Andrew; Laghumavarapu, Ramesh B.; Huffaker, Diana L.

doi:10.1016/j.surfcoat.2013.06.058

Cited by 18 publications

(13 citation statements)

References 24 publications

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“…The crystals were grown using three different methods: vapor-solid (VS), vapor-liquid-source (VLS) [3,16,17] and micro-crucible. The crystals grow from the free end in the case of two first methods and from the bottom end in micro-crucible.…”

Section: Methodsmentioning

confidence: 99%

“…In the case of clean surfaces, VS growth is realized when Cd and S vapors condensate on the free end of whiskers and chemically interact growing the crystal. In the VLS method some additional materials are used as nuclei and "catalyzer" of the crystal growth being situated in the form of liquid film on the free end of growing crystal [16]. In this case, the crystals grow on the solid-liquid interface.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Luminescent analysis of the quality of CdS nanocrystals depending on technological parameters

Bogoslovskaya¹

2019

Semicond. phys. quantum electron. optoelectron

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Luminescent analysis of the quality of CdS nanocrystals depending on technological parameters

Bogoslovskaya¹

2019

Semicond. phys. quantum electron. optoelectron

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“…They are obtained by transport of the vapor species to the substrates covered with the catalyst. Different growth mechanisms have been found to be involved in the formation of nanostructures, the most characteristic being the vapor-liquid-solid (VLS) one (Givargizov, 1975;Kolasinski, 2006;Grynko et al, 2013). According to this mechanism, the metal catalyst forms a drop in which vapor species dissolve until oversaturation; then, the excess material precipitates and the nanowire forms with a drop at the tip.…”

Section: Introductionmentioning

confidence: 99%

Bi Catalyzed CdS Nanowires With Temperature-Dependent Morphologies for Potential Applications in Solar Cells

Zayas-Bazán¹,

Z-B²,

Melo

et al. 2020

Front. Mater.

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In this work, we present the preparation of CdS nanowires (CdS NWs) using the chemical vapor deposition technique and bismuth (Bi) nanoparticles as catalysts. The obtained nanowires were found to be in the hexagonal Greenockite structure according to XRD diffractograms and Raman spectroscopy measurements. Depending on the growth temperature, two kinds of morphologies were observed in SEM images. At low temperature (around 150 • C), a high density and homogeneous population of thin and straight nanowires grown through the vapor-liquid-solid mechanism was observed. At higher temperature (around 270 • C), thicker bunches of braided nanowires were observed. A quantitative analysis of the temperature-dependent photoluminescence spectra of the CdS NWs was carried out.

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“…We are working on the usage of features of nanocrystals growth processes that allow formation of filamentary-like and more complex topologies of nanoobjects by using guided self-organization effects sometimes are easier than the traditional techniques of planar technology [4][5][6]. Earlier, we demonstrated several new techniques for CdS crystals growth [7][8][9] that allow controlling morphology, size, position on the substrate and the crystal structure of CdS nanosized crystals during chemical condensation from the gas phase in a quasi-closed volume. These techniques allow to grow CdS single crystals with a characteristic diameter of 20 up to 500 nm, length of 100 nm up to 1 mm, of both wurtzite and zinc-blende type of crystal symmetry.…”

Section: Introductionmentioning

confidence: 99%

Piezo-mechanical impedance of nanosized CdS single crystal

Bogoslovskaya¹

2019

Semicond. phys. quantum electr. optoelectron

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The design of a piezo-mechanical device based on nanosized CdS single crystal is a challenging task for demonstration of both the technological capabilities of crystal growth control in order to form simple sensor device topologies and the integrated usage of unique material properties with bottom-up approach. Analysis of luminescence spectra of CdS nanocrystals grown from the gas phase at the temperature 400 °C in the quasi-closed volume revealed that doping takes place with tin, as a component of ITO conductive film, simultaneously with doping with gold or silver from catalyze droplets. Piezo-mechanical longitudinal vibrations along the main symmetry axis of wurtzite-type single crystal have been presented in the continuous medium approximation based on experimental values of the nanocrystal piezo-module. Theoretical analysis of the frequency dependence of resonance oscillations for the nanosized beam-type piezo-mechanical resonators based on the CdS nanocrystal enabled to ascertain the equivalent RLC two-pole and values of the equivalent elements L and C prognosticated: there are high values of L-tens and hundreds of henry and very small values of the series capacitance of the order of femto-and attofarads. Below the resonance, the impedance of the crystal reaches gigaohms and has an inductive character.

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Growth of CdS nanowire crystals: Vapor–liquid–solid versus vapor–solid mechanisms

Cited by 18 publications

References 24 publications

Luminescent analysis of the quality of CdS nanocrystals depending on technological parameters

Luminescent analysis of the quality of CdS nanocrystals depending on technological parameters

Bi Catalyzed CdS Nanowires With Temperature-Dependent Morphologies for Potential Applications in Solar Cells

Piezo-mechanical impedance of nanosized CdS single crystal

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