Growth of Boron‐Rich Nanowires by Chemical Vapor Deposition (CVD)

Guo, Li; Singh, Rajeev; Kleebe, Hans‐Joachim

doi:10.1155/jnm/2006/58237

Cited by 17 publications

(13 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Also, in all spectra, there is a peak around 900 cm −1 which may correspond to the intraicosohedral vibration modes. 6 Icosohedral boron units are present in YB 66 with 12 B 12 units surrounding another B 12 unit. In the higher temperature regions of wafer 1 and wafer 2, there are prominent peaks around 800 cm −1 , which may also correspond to intraicosohedral vibration modes.…”

Section: Results and Analysismentioning

confidence: 99%

Synthesis and Characterization of YB66 Nanowires

Tan

Jash

Trenary

2008

J Undergrad Research UIC

View full text Add to dashboard Cite

The objective of the current research is to synthesize yttrium boride (YB 66 ) nanowires. Catalyst assisted growth of the nanowires under the vapor-liquid-solid (VLS) synthesis method was performed in a quartz tube furnace. The pyrolysis of diborane (B2H6) gas over yttrium oxide (Y2O3) powders with a thermally coated layer of nickel catalyst was carried out. The reaction conditions were at 925• C and a pressure of 390 mTorr with varying reaction times. SEM analysis has shown the growth of nanowires with diameters around 400 nm. A catalyst particle was also seen at the tip of the nanowires, confirming growth by the VLS mechanism. Other analysis techniques that were used include Raman spectroscopy and TEM analysis. The Raman spectra of the nanowires were in good agreement with a Raman spectrum obtained on a YB66 single crystal. However, no other evidence was obtained that the nanowires contained yttrium or that the nanowires consisted of YB 66 .

show abstract

Section: Results and Analysismentioning

confidence: 99%

Synthesis and Characterization of YB66 Nanowires

Tan

Jash

Trenary

2008

J Undergrad Research UIC

View full text Add to dashboard Cite

show abstract

“…The C 1s component at 286.3 eV is due to C-O or C-OH bond [6], a peak at 290.9 eV is due to Li 2 CO 3 . The B 1s spectrum shows two components at 188.9 eV is due to boron atoms bonded only to the other boron atoms [7], and at 193.8 eV represents the oxidized boron. …”

Section: Methodsmentioning

confidence: 99%

Hydrogenation in SWCNTs Functionalized with Borane

Silambarasan¹,

Vasu²,

Surya³

et al. 2011

AIP Conference Proceedings

View full text Add to dashboard Cite

We have done the experimental investigation of hydrogen storage in functionalized single-walled carbon nanotubes (SWCNTs). The SWCNTs having the average diameter of 22 nm are deposited on alumina substrates by drop casting method. The functionalization of SWCNTs with BH 3 using LiBH 4 as the precursor, over the surface of SWCNTs is done by the same chemical method. Further, the functionalized samples are hydrogenated in the hydrogenation chamber. The samples are characterized through FTIR, XPS and CHNS studies. A hydrogen storage capacity of 0.87 wt % at 100º C is observed.

show abstract

“…By analyzing the HRTEM image, the lattice fringes revealed to be 0.51 nm is in accordance with α-tetragonal lattice. [27,28] As revealed in XRD pattern ( Figure S1, Supporting Information), the diffraction peak at around 24° suggests the (110) peak of BNWs (JCPDS Card No. 73-0511 ( Figure 1e).…”

Section: Characterization Of Bnws-cfcmentioning

confidence: 99%

“…Typical TEM image confirms the structure of as-fabricated BNWs possess a diameter around 95 nm (Figure 1d). [27,28] The peaks centered at 703 and 810 cm −1 indicate intraicosahedral vibration modes, which are attributed to vibrating of B atoms in an icosahedra unit (A 1g or E g symmetries). The growth direction is along the [001] orientation, which is in agreement with the data of the Joint Committee for Powder Diffraction Standards (JCPDS) Card No.…”

Section: Characterization Of Bnws-cfcmentioning

confidence: 99%

Boron Element Nanowires Electrode for Supercapacitors

Xue

Gan

Huang

et al. 2018

Advanced Energy Materials

View full text Add to dashboard Cite

attention as ideal energy storage devices owing to their excellent power density, high safety, quick charging/discharging, and good cycling stability. [7][8][9][10][11][12][13] A research frontier is to develop flexible supercapacitors with good electrochemical and mechanical performance, where the integration of flexibility in supercapacitors is of great importance for powering various flexible electronics and enabling applications in multifunctional flexible electronics. [11,[14][15][16][17] Notably, the electrode material is the most crucial component for a supercapacitor, which directly determines the performance of supercapacitors. Electrical double-layer capacitors (EDLCs) suffer from the low specific capacitance which constitutes a huge obstacle for increasing the energy density, whereas pseudocapacitors possess the higher specific capacitance but are confined by relatively poor cycling stability and long discharging time. [1,14,18] So far, intensive efforts are aimed at improving the performance of supercapacitor based on traditional active materials including carbon-based material, transitional metal-based material, and conducting polymers. [1][2][3][4]7,8,19] Although some novel materials, including sulfides, selenides, etc., have been proposed to be supercapacitive materials, the pursuit of new categories of active materials as electrodes of supercapacitors remains a great challenge. [20][21][22] Recently, Jiang and co-workers theoretically predicted the superior capacitive performance of 2D boron sheets, which exhibit specific capacitance on the order of 400 F g −1 owing to their metallicity and low weight, suggesting boron element might be a potential electrode material of supercapacitors. [23] Unfortunately, so far, the desired experimental work on any materials based on boron element for supercapacitor has not been reported.Herein, we report a new category of supercapacitor materials: boron element nanowires (BNWs). Single-crystal BNWs were synthesized through a cost-effective chemical vapor deposition (CVD) method. Surprisingly, the as-prepared BNWs demonstrate high stability and promising capacitance in all alkaline, neutral, and acid aqueous electrolytes. Especially, in an H 2 SO 4 electrolyte, the BNWs on a carbon fiber cloth (CFC) substrate achieved a capacitance up to 60.2 mF cm −2 . Moreover, to understand the mechanism of capacitance in BNWs-CFCs, we studied the electrochemically charge/discharge processes of BNWs-CFC electrodes in three different electrolytes, which reveals different The pursuit of new categories of active materials as electrodes of supercapacitors remains a great challenge. Herein, for the first time, elemental boron as a superior electrode material of supercapacitors is reported, which exhibits significantly high capacitances and excellent rate performance in all alkaline, neutral, and acidic electrolytes. Notably, boron nanowire-carbon fiber cloth (BNWs-CFC) electrodes achieve a capacitance up to 42.8 mF cm −2 at a scan rate of 5 mV s −1 and 60.2 mF cm −2 at a current d...

show abstract

Growth of Boron‐Rich Nanowires by Chemical Vapor Deposition (CVD)

Cited by 17 publications

References 16 publications

Synthesis and Characterization of YB66 Nanowires

Synthesis and Characterization of YB66 Nanowires

Hydrogenation in SWCNTs Functionalized with Borane

Boron Element Nanowires Electrode for Supercapacitors

Contact Info

Product

Resources

About