Morphology and diameter controllable synthesis of boron nanowires

Yang, Qin; Sha, Jian; Wang, L.; Su, Zhen; Ma, Xiangyang; Wang, J.; Yang, Deren

doi:10.1007/s10853-005-5638-9

Cited by 16 publications

(12 citation statements)

References 27 publications

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“…Yang et al [ 111 ] demonstrated control over the morphology and diameter of amorphous boron nanowires, in CVD with VLS growth on silicon substrates, by altering the growth temperature and the thickness of the catalyst Au films on the substrate. A mixture of nitrogen, hydrogen, and diborane with a flow ratio of 10:50:1 was introduced in the quartz tube with Au-coated Si substrate at 750–1000 °C and 5 × 10 4 Pa for 5 hours.…”

Section: One-dimensional (1d) Boron Nanomaterialsmentioning

confidence: 99%

“…On the other hand, in 2008, rhombohedral crystalline boron nanobelts with a [ 111 ] growth direction and amorphous boron nanobelts were synthesized separately by controlling the condition of the method with a vapor-liquid-solid technique by Ni and Li [ 137 ]. Here, a mixture of boron, silicon, and iodine powders with the weight ratio 40:1:1 was placed into a smaller quartz boat and placed at one end of a quartz tube of diameter 19.05 mm, while a single crystal Si(100) substrate was placed at the other end of the tube after coating with a 3- or 20-nm Au film (the former was used for crystalline boron nanobelt growth and the latter was used for amorphous boron nanobelt growth).…”

Section: One-dimensional (1d) Boron Nanomaterialsmentioning

confidence: 99%

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Recent progress in boron nanomaterials

Kondo

2017

Science and Technology of Advanced Materials

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Various types of zero, one, and two-dimensional boron nanomaterials such as nanoclusters, nanowires, nanotubes, nanobelts, nanoribbons, nanosheets, and monolayer crystalline sheets named borophene have been experimentally synthesized and identified in the last 20 years. Owing to their low dimensionality, boron nanomaterials have different bonding configurations from those of three-dimensional bulk boron crystals composed of icosahedra or icosahedral fragments. The resulting intriguing physical and chemical properties of boron nanomaterials are fascinating from the viewpoint of material science. Moreover, the wide variety of boron nanomaterials themselves could be the building blocks for combining with other existing nanomaterials, molecules, atoms, and/or ions to design and create materials with new functionalities and properties. Here, the progress of the boron nanomaterials is reviewed and perspectives and future directions are described.

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Section: One-dimensional (1d) Boron Nanomaterialsmentioning

confidence: 99%

Section: One-dimensional (1d) Boron Nanomaterialsmentioning

confidence: 99%

Recent progress in boron nanomaterials

Kondo

2017

Science and Technology of Advanced Materials

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“…10 Morphology and diameter controllable boron nanowires were synthesized by means of CVD on Si substrate with diborane through controlling the growth temperature and the thickness of catalyst (Au) films. 11 Boron nanowires with smooth surfaces were fabricated in the temperature range 800-900 °C and the diameter increased slightly with increasing growth temperature. Amorphous boron nanowires have been prepared by CVD on Au-coated MgO substrates in the presence of Si 12 and radio frequency magnetron sputtering of boron powder onto Si.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Uniform Diameter Boron-Based Nanostructures Using a Mesoporous Mg−Al₂O₃ Template and Tests for Superconductivity

et al. 2009

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Mg incorporated mesoporous alumina with high surface area and narrow pore size distribution was prepared by the sol−gel method to use as a template for the synthesis of boron-based nanostructures by the CVD method. The mesoporous nature of the Mg−Al2O3 was confirmed by low-angle XRD and N2 adsorption analyses. The randomly ordered pores were observed by TEM. The growth of boron-based nanostructures, such as nanowires and nanotubes, over Mg−Al2O3 is evidenced by TEM analysis. Use of BCl3 as the boron source resulted in nanowires of around 20 nm in diameter and several micrometers in length. When using B2H6 as the boron source, the diameter of the obtained nanostructures was in the range 3−4 nm, reflective of the pore diameter of Mg−Al2O3. Further loading of Mg in the form of Rieke Mg by sonication over 1% Mg−Al2O3 resulted in the growth of straight nanotubes with a uniform diameter of 3−4 nm. The NEXAFS of the boron K-edge of purified boron-based nanostructures shows characteristic peaks for the existence of Mg−B and Al−B bonding. The STEM and EELS of the obtained individual nanostructures confirm the presence of B, Mg, and Al in the nanostructures. The appearance of a boron prepeak at 186 eV in EELS indicates that the boron hole states are not filled by the aluminum present in the nanostructures. Both field dependent DC magnetization (SQUID) and AC magnetic susceptibility measurements of Mg x B y nanostructures grown over 2 wt % Rieke Mg sonicated 1% Mg−Al2O3 using B2H6 as the boron source show evidence of a diamagnetic transition at about 80 K. The diamagnetic nature of Mg x B y nanostructures is suppressed significantly when the grown Mg x B y nanostructures are washed with NaOH solution to remove the template.

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“…Yang et al [81] demonstrated growth of boron nanowires from VLS deposition of diborane at 900 °C (Fig 4 .31); this is similar to the 1000 °C annealing performed for the synthesis of 3K-0235, with diborane an expected product of decaborane's decomposition [58]. This work utilized Au catalysts, but Fe is commonly utilized in the VLS growth of carbon nanotubes [82], so the efficacy observed here is not overtly surprising.…”

Section: Chemical Analysis: Ftirsupporting

confidence: 67%

From the lab bench to the fuel tank : development and analysis of novel adsorbents for hydrogen and natural gas storage

Stalla¹

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Hydrogen and natural gas offer a promising avenue towards reducing greenhouse gas emissions in the transportation sector; however, storage poses a non-trivial challenge, with current systems requiring prohibitively large and bulky hardware. Adsorbent media, notably nanoporous activated carbons, have seen significant development towards making such solutions viable, but none have yet to demonstrate the performance necessary to supplant existing technologies. Presented here is the synthesis and optimization of two materials designed to be especially competitive, as well as the techniques implemented to characterize them. Boron doping of nanoporous carbons, with the incorporation of carrier gas assisted deposition, is proposed to enhance the surface's binding potential while maintaining the integrity of the inherent pore space. This process explicitly demonstrates complete infiltration of the carbon's internal volume and facilitates boron substitution to a greater extent relative to other similarly-produterials. Carbon nitrides, specifically the graphitic isomer g-C[subscript 3]N[subscript 4], are theorized to produce adsorbents with surface areas and binding energy in excess of activated carbons via facile synthesis. Crystallographic investigation reveals the previously-reported synthesis methods instead produce a polymeric structure; this results in a highly-aggregating bulk that strongly resists exfoliation.

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Morphology and diameter controllable synthesis of boron nanowires

Cited by 16 publications

References 27 publications

Recent progress in boron nanomaterials

Recent progress in boron nanomaterials

Synthesis of Uniform Diameter Boron-Based Nanostructures Using a Mesoporous Mg−Al₂O₃ Template and Tests for Superconductivity

From the lab bench to the fuel tank : development and analysis of novel adsorbents for hydrogen and natural gas storage

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Morphology and diameter controllable synthesis of boron nanowires

Cited by 16 publications

References 27 publications

Recent progress in boron nanomaterials

Recent progress in boron nanomaterials

Synthesis of Uniform Diameter Boron-Based Nanostructures Using a Mesoporous Mg−Al2O3 Template and Tests for Superconductivity

From the lab bench to the fuel tank : development and analysis of novel adsorbents for hydrogen and natural gas storage

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Product

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Synthesis of Uniform Diameter Boron-Based Nanostructures Using a Mesoporous Mg−Al₂O₃ Template and Tests for Superconductivity