Synthesis of ZnS Nanowires and Assemblies by Carbothermal Chemical Vapor Deposition and Their Photoluminescence

Zhang, Hua; Zhang, Shuyuan; Zuo, Ming J.; Li, Gongpu; Hou, J. G.

doi:10.1002/ejic.200400668

Cited by 33 publications

(24 citation statements)

References 39 publications

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“…Therefore, the strong blue emission at around 453 nm should be assigned to the stoichiometric vacancies in the ZnS nanocrystal, and the nanobelts present high sulfur vacancy than the nanorods and tetrapods according to intensity of the emission peaks. Another strong emission peak is located at 487 nm, which is similar to that of the well-known ZnS-related luminescence (at about 480 nm) produced by zinc vacancies [ 32 ]. Because the crystal growth in the plasma process is very rapid and the structure defects are inevitably, we reasonably believe that the green–blue luminescence is associated with the defect-related emission of the ZnS host.…”

Section: Resultssupporting

confidence: 59%

Shape-Controlled Synthesis of ZnS Nanostructures: A Simple and Rapid Method for One-Dimensional Materials by Plasma

Bai

Liu

et al. 2009

Nanoscale Res Lett

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In this paper, ZnS one-dimensional (1D) nanostructures including tetrapods, nanorods, nanobelts, and nanoslices were selectively synthesized by using RF thermal plasma in a wall-free way. The feeding rate and the cooling flow rate were the critical experimental parameters for defining the morphology of the final products. The detailed structures of synthesized ZnS nanostructures were studied through transmission electron microscope, X-ray diffraction, and high-resolution transmission electron microscope. A collision-controlled growth mechanism was proposed to explain the growth process that occurred exclusively in the gas current by a flowing way, and the whole process was completed in several seconds. In conclusion, the present synthetic route provides a facile way to synthesize ZnS and other hexagonal-structured 1D nanostructures in a rapid and scalable way.

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Section: Resultssupporting

confidence: 59%

Shape-Controlled Synthesis of ZnS Nanostructures: A Simple and Rapid Method for One-Dimensional Materials by Plasma

Bai

Liu

et al. 2009

Nanoscale Res Lett

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“…More recently, a range of nanostructured materials such as nanowires (Zhang et al 2005), nanosheets (Yue et al 2006) and nanoparticles (Cao et al 2004) has been produced, using both CdS and ZnS. Many experimental studies have been carried out to investigate the mechanisms of iron incorporation in sphalerite (e.g., Lepetit et al 2003, Di Benedetto et al 2005a, 2005b, Pring et al 2008, whereas other work has focused on manganese and cadmium (Pattrick et al 1998, Bernardini et al 2004.…”

Section: Bulk Defectsmentioning

confidence: 97%

The Incorporation of Cadmium, Manganese and Ferrous Iron in Sphalerite: Insights From Computer Simulations

Wright

2009

The Canadian Mineralogist

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Techniques of atomistic simulation have been used to study the incorporation of the M 2+ impurities iron, manganese and cadmium into sphalerite. The calculations show that bulk impurity ions are most easily incorporated by direct substitution at the Zn site, and that the substitution energies exhibit a linear relationship with ionic radii. Furthermore, there appears to be no driving force for the creation of clusters, or any barrier to their formation. However, the formation of iron pairs leads to deviations from Vegard's Law. Simulations of pure ZnS surfaces have identified a new reconstruction for the zinc-terminated (111), which has the lowest energy of all {111}-type surfaces. Furthermore, impurities can exchange with zinc more easily on (111) than on any of the other surfaces studied. The results of the simulations show that crystal morphology and surface structure will exert an influence on uptake of impurities, with the effect being most noticeable for cadmium and least important for iron.

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“…The luminescence features of ZnS are commonly assigned to surface states, 27,28 sulfur vacancies, 29,30 zinc vacancies, [31][32][33][34] elemental sulfur species 20,35 or impurities 17,36 in ZnS. However, it is still unclear what are the luminescent sites contributing to each of the luminescence bands.…”

Section: Introductionmentioning

confidence: 99%

Visible emission characteristics from different defects of ZnS nanocrystals

Wang

Shi

Feng

et al. 2011

Phys. Chem. Chem. Phys.

171

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Various sized ZnS nanocrystals were prepared by treatment under H 2 S atmosphere. Resonance Raman spectra indicate that the electron-phonon coupling increases with increasing the size of ZnS. Surface and interfacial defects are formed during the treatment processes. Blue, green and orange emissions are observed for these ZnS. The blue emission (430 nm) from ZnS without treatment is attributed to surface states. ZnS sintered at 873 K displays orange luminescence (620 nm) while ZnS treated at 1173 K shows green emission (515 nm). The green luminescence is assigned to the electron transfer from sulfur vacancies to interstitial sulfur states, and the orange emission is caused by the recombination between interstitial zinc states and zinc vacancies. The lifetimes of the orange emission are much slower than that of the green luminescence and sensitively dependent on the treatment temperature. Controlling defect formation makes ZnS a potential material for photoelectrical applications.

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Synthesis of ZnS Nanowires and Assemblies by Carbothermal Chemical Vapor Deposition and Their Photoluminescence

Cited by 33 publications

References 39 publications

Shape-Controlled Synthesis of ZnS Nanostructures: A Simple and Rapid Method for One-Dimensional Materials by Plasma

Shape-Controlled Synthesis of ZnS Nanostructures: A Simple and Rapid Method for One-Dimensional Materials by Plasma

The Incorporation of Cadmium, Manganese and Ferrous Iron in Sphalerite: Insights From Computer Simulations

Visible emission characteristics from different defects of ZnS nanocrystals

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