Controlled synthesis and characterization of single crystalline MnO nanowires and Mn–Si oxide heterostructures by vapor phase deposition

Banis, Mohammad Norouzi; Zhang, Yong; Banis, Hamid Norouzi; Li, Ruying; Sun, Xueliang; Jiang, Xinxiang; Nikanpour, Darius

doi:10.1016/j.cplett.2010.11.078

Cited by 11 publications

(6 citation statements)

References 31 publications

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“…On the basis of the XRD results (Figure 1: the presence of TaSi 2 and Ta 5 Si 3 patterns) and HRTEM (Figure 2) observations of the Ta 5 Si 3 nanostructures, it can be concluded that these nanoparticles have TaSi 2 and Ta 5 Si 3 crystal structures. Similar to previous reports on the synthesis of TiSi 2 17,22 and MnO 26 nanostructures, these intermediate layers formed on the substrate can facilitate the deposition and growth of Ta 5 Si 3 nanostructures.…”

Section: Resultssupporting

confidence: 82%

Tailoring of Single-Crystalline Complex Ta₅Si₃ Nanostructures: From Networked Nanowires to Nanosheets

Banis

Zhang

Xiao

et al. 2013

Crystal Growth & Design

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Single-crystalline Ta 5 Si 3 nanostructures with a complex morphology were synthesized through a catalyst-free, chemical vapor deposition method under low pressures. The morphology, structure, and composition of deposited nanostructures were studied by scanning electron microscopy, X-ray diffraction, and high-resolution transmission electron microscopy. These nanostructures have lengths of up to several tens of micrometers and an average thickness of 13 nm. It was found that the formation of networked Ta 5 Si 3 nanostructures is highly sensitive to the vapor pressure of tantalum chloride and silica and is based on a vapor−solid mechanism. Results indicate that, with the decrease of silica vapor pressure, the Ta 5 Si 3 networked nanowires evolve into networked nanoribbons and nanosheets via two-dimensional growth. Cyclic voltammetry measurements of the Ta 5 Si 3 nanostructures show superior electrochemical capacitance properties of nanosheets compared to nanowires. It is expected that these nanostructures have great potential applications for nanodevices in electronic and energy related applications.

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Section: Resultssupporting

confidence: 82%

Tailoring of Single-Crystalline Complex Ta₅Si₃ Nanostructures: From Networked Nanowires to Nanosheets

Banis

Zhang

Xiao

et al. 2013

Crystal Growth & Design

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“…In terms of the synthesis methods of MnO, several approaches have been developed to prepare nanostructured MnO with different morphologies [28-42], such as hydrothermal reactions and subsequent annealing [28], thermal decomposition of Mn-containing organometallic compounds [29-32], thermal decomposition of MnCO 3 precursor [33,34], vapor-phase deposition [37], etc. More recently, Lin et al reported a simple one-pot synthesis of monodispersed MnO nanoparticles (NPs) using bulk MnO as the starting material and oleic acid as solvent [38].…”

Section: Introductionmentioning

confidence: 99%

A simple additive-free approach for the synthesis of uniform manganese monoxide nanorods with large specific surface area

et al. 2013

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A simple additive-free approach is developed to synthesize uniform manganese monoxide (MnO) one-dimensional nanorods, in which only manganese acetate and ethanol were used as reactants. The as-synthesized MnO nanorods were characterized in detail by X-ray diffraction, scanning and transmission electron microscopy (TEM) including high-resolution TEM and selected-area electron diffraction, Fourier transform infrared spectrum, and nitrogen adsorption isotherm measurements. The results indicate that the as-synthesized MnO nanorods present a mesoporous characteristic with large specific surface area (153 m2 g−1), indicating promising applications in catalysis, energy storage, and biomedical image. On the basis of experimental results, the formation mechanism of MnO one-dimensional nanorods in the absence of polymer additives was also discussed.

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“…For catalyst-assisted growth of nanostructures, the vapor–liquid–solid growth (VLS) mechanism has been widely accepted. ,, The presence of solidified droplets at tip of synthesized nanostructures is often considered to be the evidence of a VLS mechanism. In our study, however, no catalyst was employed for the growth of tungsten based nanostructures.…”

Section: Resultsmentioning

confidence: 99%

Spatially Sequential Growth of Various WSi₂ Networked Nanostructures and Mechanisms

et al. 2013

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Various WSi 2 nanostructures including networked nanorods (NNWs), networked nanoribbons (NNRs), and nanosheets (NSs) were sequentially (spatial) synthesized in a controlled manner via a single-step chemical vapor deposition method. Their morphology, structure, and composition were characterized by scanning and transmission electron microscopes and X-ray diffraction. The nanostructures are 6−10 nm in thickness and several micrometers in length. The results reveal that the formation of WSi 2 nanostructures is governed by a vapor solid mechanism and the concentration of reactive species plays a crucial role in controlling the formation of the various morphologies of the synthesized nanostructures. The time-dependent growth study shows that the nanostructures feature two-dimensional growth of WSi 2 , resulting in nanonets and nanosheets. Cyclic voltammetry measurements of these nanostructures demonstrate the chemical capacitance characteristics of WSi 2 nanosheets and nanoribbons. Not only has this study paved a new route for preparing various nanostructures, but also these nanostructures are of great interest for nanodevices and electrochemical applications.

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Controlled synthesis and characterization of single crystalline MnO nanowires and Mn–Si oxide heterostructures by vapor phase deposition

Cited by 11 publications

References 31 publications

Tailoring of Single-Crystalline Complex Ta₅Si₃ Nanostructures: From Networked Nanowires to Nanosheets

Tailoring of Single-Crystalline Complex Ta₅Si₃ Nanostructures: From Networked Nanowires to Nanosheets

A simple additive-free approach for the synthesis of uniform manganese monoxide nanorods with large specific surface area

Spatially Sequential Growth of Various WSi₂ Networked Nanostructures and Mechanisms

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Controlled synthesis and characterization of single crystalline MnO nanowires and Mn–Si oxide heterostructures by vapor phase deposition

Cited by 11 publications

References 31 publications

Tailoring of Single-Crystalline Complex Ta5Si3 Nanostructures: From Networked Nanowires to Nanosheets

Tailoring of Single-Crystalline Complex Ta5Si3 Nanostructures: From Networked Nanowires to Nanosheets

A simple additive-free approach for the synthesis of uniform manganese monoxide nanorods with large specific surface area

Spatially Sequential Growth of Various WSi2 Networked Nanostructures and Mechanisms

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Tailoring of Single-Crystalline Complex Ta₅Si₃ Nanostructures: From Networked Nanowires to Nanosheets

Tailoring of Single-Crystalline Complex Ta₅Si₃ Nanostructures: From Networked Nanowires to Nanosheets

Spatially Sequential Growth of Various WSi₂ Networked Nanostructures and Mechanisms