نتایج جستجو برای: boron nitride nanotube reinforced composites

تعداد نتایج: 124027  

Influence of Aluminum, Gallium, Indium- Doping on the Boron-Nitride Nanotubes (BNNTs) investigated with density functional theory (DFT) and Hartreefock (HF) methods. For this purpose, the chemical shift of difference atomic nucleus was studied using the gauge included atomic orbital (GIAO) approch. In the following, structural parameter values, electrostatic potential, thermodynamic parameters,...

Journal: :Physical review letters 2006
Masa Ishigami Jay Deep Sau Shaul Aloni Marvin L Cohen A Zettl

We have imaged boron nitride nanotubes with atomic scale resolution using scanning tunneling microscopy. While some nanotubes show the expected triangular lattice pattern, the majority of the nanotubes show unusual stripe patterns which break the underlying symmetry of the boron nitride lattice. We identify the origin of the symmetry breaking and demonstrate that conventional STM imaging analys...

Journal: :E3S web of conferences 2021

The glass-reinforced laminated composite is widely used in place of conventional structural materials. glass fiber composites demonstrate outstanding strength the uniaxial direction. effect carbon nanotube reinforcement percentage on flexural polymer investigated this article. final laminates has been found to improve by reinforcing Carbon nanotube. small incorporation MWCNT improves up 51.3%. ...

Journal: :Crystals 2022

We investigated the effects of applying an external electric field on electronic properties Stone-Wales (SW) defective carbon-boron-nitride nanotubes (CBN) using first principles calculations. The CBN were modeled by introducing Stone–Wales defects in boron-nitride segment (BN-SW), carbon (C-SW), and interface (CBN-SW). Initially, we studied formation energies structural stability for all model...

Journal: :Chemical communications 2015
Dukeun Kim Sayuka Nakajima Toshiki Sawada Mahiro Iwasaki Susumu Kawauchi Chunyi Zhi Yoshio Bando Dmitri Golberg Takeshi Serizawa

Boron nitride (BN)-based nanomaterials attract considerable attention due to their unique properties. In this study, we found that sonication treatment of multiwalled boron nitride nanotubes (BNNTs) in primary alcohols had led to chemical peeling of their sidewalls through alcoholysis, thereby producing boron nitride nanoribbons (BNNRs).

Journal: :journal of physical & theoretical chemistry 2014
nasrin zeighami asadollah boshra mohammad reza gholami mehran aghaie

the doping reaction of truncated boron nitride and carbon nanotubes with aluminium atom wastheoretically investigated. the am1, pm3, and pm6 semiempirical methods have been used toevaluate the thermochemistry of doping reactions of single walled boron nitride nanotubes andcarbon nanotubes. the enthalpy changes, gibbs free energy changes, and entropy changes of studieddoping reactions were evalu...

Journal: :Nature communications 2014
Yongji Gong Gang Shi Zhuhua Zhang Wu Zhou Jeil Jung Weilu Gao Lulu Ma Yang Yang Shubin Yang Ge You Robert Vajtai Qianfan Xu Allan H MacDonald Boris I Yakobson Jun Lou Zheng Liu Pulickel M Ajayan

Graphene and hexagonal boron nitride are typical conductor and insulator, respectively, while their hybrids hexagonal boron carbonitride are promising as a semiconductor. Here we demonstrate a direct chemical conversion reaction, which systematically converts the hexagonal carbon lattice of graphene to boron nitride, making it possible to produce uniform boron nitride and boron carbonitride str...

Journal: :Journal of Nanomaterials 2021

Graphene and its derivatives have excellent properties such as high surface area, thermal, mechanical strength, this fact made the researchers promote them possible filler material for fiber-matrix composite. The current research deals with validation on effect of graphene oxide boron nitride over thermal stability epoxy glass fiber polymer matrix objective experimental investigation is to deve...

Journal: :Journal of Composite Materials 1975

Journal: :International journal of engineering and applied sciences 2021

Boron Nitride Nanotube (BNNT) is a promising nano sized structure with superior electrical, physical, and mechanical properties comparing to Carbon nanotube. Higher Young’s modulus, oxidation resistance, hardness, corrosion durability in high temperature, piezoelectric pyroelectric characteristics are some featured of BNNT. In this paper the critical buckling load investigated. Two different me...

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