Raman Spectroscopy of Single-wall BN Nanotubes

Concha, R. Arenal de la; Wirtz, Ludger; Mevellec, Jean‐Yves; Lefrant, S.; Rubio, Ángel; Loiseau, Annick

doi:10.1063/1.1628055

AIP Conference Proceedings

2003

DOI: 10.1063/1.1628055

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Raman Spectroscopy of Single-wall BN Nanotubes

R. Arenal de la Concha

Ludger Wirtz

Jean‐Yves Mevellec³

et al.

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“…These unique characteristics make BNNTs ideal for a variety of new potential nanoelectronic 10) and optoelectronic applications such as UV light emitters 11) and lasers. 12) In recent years, much effort has been exerted into the unambiguous characterization of BNNTs using various techniques such as Raman and infrared spectroscopy that proved to be quite successful for the diagnostics of carbon nanotubes. 11,[13][14][15] Theoretically, phonon characteristics could be calculated to identify the types of BNNTs.…”

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confidence: 99%

Temperature-dependent Raman spectra of bamboo-like boron nitride nanotubes

Lü¹,

Ren²,

Sun³

et al. 2014

Appl. Phys. Express

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Phonon properties of boron nitride nanotubes (BNNTs) were investigated using Raman spectroscopy at different temperatures and new sp3-bonded BN vibrations were identified. The Raman peak of the mode of BNNTs is found to be downshifted and broadened compared to that of hexagonal BN at the same temperature. By increasing the temperature, the energy of the mode and the sp3-bonding mode are downshifted, with the temperature coefficients being −0.010 and −0.069 cm−1/K, respectively. We attribute this downshifting to anharmonic effects as well as the elongation of the B–N bond in BNNT structures with increasing temperature.

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mentioning

confidence: 99%

Temperature-dependent Raman spectra of bamboo-like boron nitride nanotubes

Lü¹,

Ren²,

Sun³

et al. 2014

Appl. Phys. Express

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The structure and electronic property of BN nanotube

Jia

Jiao

2006

Physica B: Condensed Matter

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Effects of Boron Nitride Nanotube on the Secondary Structure of Aβ(1–42) Trimer: Possible Inhibitory Effect on Amyloid Formation

Sorout

Chandra

2020

J. Phys. Chem. B

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Aggregation of amyloid-β (Aβ) peptides into prefibrillar toxic oligomers is responsible for Alzheimer’s disease, which is one of the most commonly known forms of neurodegenerative diseases. It has been reported that the low-molecular weight Aβ(1–42) trimer and its higher order oligomers are responsible for the cytotoxicity in the neuronal cells, leading to their death. Various experimental studies have shown that boron nitride nanotube (BNNTs) are noncytotoxic for health and environment and biocompatible in living cells and can be used as delivery vehicles for brain anticancer drugs. Here, we investigate the effects of BNNT on the secondary structure of Aβ(1–42) in the amyloid oligomerization process. We have performed long atomistic molecular dynamics simulations of 4.0 μs in total to study the structural stability of Aβ(1–42) trimer both in presence and absence of BNNT in explicit solvent. It is found that in the absence of BNNT, Aβ(1–42) trimer aggregates, leading to α-helix to β-sheet transition, whereas BNNT provides structural stability to the peptides by keeping them separated and preserving the initial monomeric helical conformation of the Aβ(1–42) trimer. It is found through a free-energy decomposition analysis that the key residues (Lys28, Ile31, Ile32, Leu34, Val40, and Ile41) from the C-terminal that are more responsible for β-sheet fibril formation bind with the BNNT surface and block their structural conversion. Due to the presence of polar B–N bonds, BNNT is less hydrophobic as compared with the carbonaceous nanomaterials where large hydrophobicity of these carbonaceous nanomaterials mostly destabilizes the secondary structure of peptides. The current study reveals that the less hydrophobicity of BNNT provides stability of the initial secondary structure of the Aβ(1–42) trimer and hinders their aggregation. Hence, the secondary structure stabilization in presence of BNNT provides new possibilities for the design of different nanoparticles as therapeutic agents for different types of amyloidogenesis by tuning their hydrophobicity.

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Raman Spectroscopy of Single-wall BN Nanotubes

Cited by 5 publications

References 1 publication

Temperature-dependent Raman spectra of bamboo-like boron nitride nanotubes

Temperature-dependent Raman spectra of bamboo-like boron nitride nanotubes

The structure and electronic property of BN nanotube

Effects of Boron Nitride Nanotube on the Secondary Structure of Aβ(1–42) Trimer: Possible Inhibitory Effect on Amyloid Formation

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