Synthesis of Novel Nickel Sulfide Layer-Rolled Structures

Jiang, Xiangqian; Lu, Junling; Zhu, Longjiao; He, Weidong; Qian, Yitai

doi:10.1002/1521-4095(200108)13:16<1278::aid-adma1278>3.0.co;2-w

Cited by 93 publications

(55 citation statements)

References 7 publications

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“…This is also different from the reported result for NiS layer-rolled structures, which give fluorescence emission spectra with a maximum at 370 nm. [24] This result is in reasonable agreement with that of the UV-vis absorption for NiS hollow spheres. The emission shape suggests that the interaction is not of an excimer, but is rather a consequence of strong intermolecular exciton interactions.…”

Section: Full Papersupporting

confidence: 86%

“…The emission shape suggests that the interaction is not of an excimer, but is rather a consequence of strong intermolecular exciton interactions. [24] The UV-vis absorption spectrum of NiS hollow spheres exhibits a remarkable blue-shift (about 3.46 eV) caused by their small dimensions. In contrast, the fluorescence spectrum has no significant blue-shift for its cause is center-localized excitation.…”

Section: Full Papermentioning

confidence: 99%

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Synthesis of Nickel Sulfide Submicrometer‐Sized Hollow Spheres Using a γ‐Irradiation Route

Chen²,

Chen

et al. 2004

Adv Funct Materials

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Nickel sulfide (NiS) hollow spheres have been successfully synthesized by γ‐irradiation, at room temperature, of an aqueous PMMA–CS2–ethanol solution that contains NiSO4·6H2O. Electron microscopy results show that the diameter of the NiS hollow spheres and the thickness of the sphere shells are about 500 nm and 20 nm, respectively. The room‐temperature UV‐vis absorption spectrum of the NiS hollow spheres gives a peak centered at around 233 nm (5.56 eV) with a remarkable blue‐shift relative to that of bulk NiS (2.1 eV). This remarkable blue‐shift may be attributed to the small dimensions of the materials. A possible growth mechanism of NiS hollow spheres by γ‐irradiation method is also presented. The successful preparation of NiS hollow spheres on a large scale under mild conditions could be of interest for both applications and fundamental studies.

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Section: Full Papersupporting

confidence: 86%

Section: Full Papermentioning

confidence: 99%

Synthesis of Nickel Sulfide Submicrometer‐Sized Hollow Spheres Using a γ‐Irradiation Route

Chen²,

Chen

et al. 2004

Adv Funct Materials

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“…Layer-rolled NiS structures were obtained in the NH 3 ·H 2 O-CS 2 system at 60℃. Hydrogen-bond interactions (NH…OH 2 ) play an important role in the formation of 2D layered NiS materials [41] .…”

Section: Directly Heating At Low Temperaturementioning

confidence: 99%

Solution-phase synthesis of nanomaterials at low temperature

Zhu

Qian

2009

Sci. China Ser. G-Phys. Mech. Astron.

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This paper reviews the solution-phase synthesis of nanoparticles via some routes at low temperatures, such as room temperature route, wave-assisted synthesis (γ-irradiation route and sonochemical route), directly heating at low temperatures, and hydrothermal/solvothermal methods. A number of strategies were developed to control the shape, the size, as well as the dispersion of nanostructures. Using diethylamine or n-butylamine as solvent, semiconductor nanorods were yielded. By the hydrothermal treatment of amorphous colloids, Bi 2 S 3 nanorods and Se nanowires were obtained. CdS nanowires were prepared in the presence of polyacrylamide. ZnS nanowires were obtained using liquid crystal. The polymer poly (vinyl acetate) tubule acted as both nanoreactor and template for the CdSe nanowire growth. Assisted by the surfactant of sodium dodecyl benzenesulfonate (SDBS), nickel nanobelts were synthesized. In addition, Ag nanowires, Te nanotubes and ZnO nanorod arrays could be prepared without adding any additives or templates.solution-phase synthesis, nanomaterials, low temperatures, additives, template One of the important goals for nanoscale synthesis is the production of structures that achieve monodispersity, stability, and crystallinity with a predictable morphology. Nowadays, the solution-phase approach has become a promising technique to prepare nanostructures [1] . During the solution-phase synthesis of nanoparticles, the control of nucleation and successive growth, which is extremely sensitive to the synthetic parameters, has been believed to be the key to the size-and shape-controlled synthesis of nanostructures [2][3][4][5] .It is well known that most of amorphous colloids have a strong transformation tendency from thermodynamically metastable amorphous state to stable crystalline state under appropriate conditions. As for the crystalline products with a high anisotropic crystal structure, such as orthorhombic, trigonal, and hexagonal structure, the crystallization is generally accompanied with the formation of desired structure due to the necessity to obtain a match between the symmetry of the crystal and their geometric shape [6,7] .Solvent is an important parameter on the growth of various morphologies. For example, Xia's group has reported the synthesis of various 1D nanostructures (wires, rods, and tubes) of t-Te in different solvents (ethylene glycol, water, and their mixtures) via a refluxing process [8,9] .In some of the solution-phase synthesis routes, controlling size, shape and dispersion of nanostructure have been achieved by the use of hard template (porous alumina [10,11] , mesoporous silica [12] , carbon nanotubes [13][14][15] , etc.), soft templates (liquid crystal [16] , micelles [17,18] , microemulsions [19] , etc.) or structure-directing additives, including surfactants [20,21] and polymers [22] , etc. In addition, Caswell et al. [23] have reported a seedless and surfactantless wet chemical approach to prepare silver nanowires.

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“…Interestingly, a novel a-NiS layer-rolled structure, intermediate between a twodimensional layered structure and three-dimensional isotropic material, was prepared by adding CS 2 step-by-step to an aqueous ammonia solution containing Ni(NH 3 ) 6 2þ ions at about 60 C [114]. By reacting CS 2 with Ni(NH 3 ) 6 2þ , a new complex, Ni(NH 3 Reaction temperature and solvent conditions affect the phase transition and morphology of metal chalcogenides.…”

Section: Synthesis Of One-dimensional Metal Chalcogenide Nanocrystallmentioning

confidence: 99%