نتایج جستجو برای: bnnt

تعداد نتایج: 125  

2013
Maho Yamaguchi Amir Pakdel Chunyi Zhi Yoshio Bando Dai-Ming Tang Konstantin Faerstein Dmitry Shtansky Dmitri Golberg

Multiwalled boron nitride nanotubes (BNNTs) have very attractive mechanical and thermal properties, e.g., elasticity, tensile strength, and high resistance to oxidation, and may be considered as ideal reinforcing agents in lightweight metal matrix composites. Herein, for the first time, Al-BNNT ribbons with various BNNT contents (up to 3 wt.%) were fabricated via melt spinning in an argon atmos...

Journal: :ACS applied nano materials 2021

Near-field spectroscopy has been extensively applied recently to analyze collective optical properties of materials at the nanoscale. However, vibrations small molecules were only recognizable in close proximity a metallic resonator. We show that encapsulation boron nitride nanotubes (BNNT) enhances near-field vibrational spectra C$_{60}$ fullerene, reaching sensitivity limit few hundred molecu...

Journal: :Science 2003
W Mickelson S Aloni Wei-Qiang Han John Cumings A Zettl

We have created insulated C60 nanowire by packing C60 molecules into the interior of insulating boron nitride nanotubes (BNNTs). For small-diameter BNNTs, the wire consists of a linear chain of C60 molecules.With increasing BNNT inner diameter, unusual C60 stacking configurations are obtained (including helical, hollow core, and incommensurate) that are unknown for bulk or thin-film forms of C6...

2010
Hessam M. Ghassemi Chee Huei Lee Yoke Khin Yap Reza S. Yassar

Using a novel in-situ scanning tunneling microscope integrated into a 200kV transmission electron microscope (TEM), we have shown that boron nitride nanotubes (BNNTs) possess remarkable flexibility and convert from insulator to semi-conductor upon bending. To measure the electrical properties, the BNNT was bent between two gold contacts constructing a metal-semiconductor-metal circuit. The resi...

In the present study, free vibration behaviors of of carbon nanotube (CNT) and boron nitride nanotube (BNNT) have been investigated via Eringen’s nonlocal continuum theory. Size effect has been considered via nonlocal continuum theory. Nanotubes have become popular in the world of science thanks to their characteristic properties. In this study, free vibrations of Boron Nitride Nanotube (BNNT) ...

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...

2013
Saban Kalay Zehra Yilmaz Mustafa Çulha

Colemanite (Ca2B6O11·5H2O) is a natural and new precursor material for the synthesis of boron nitride nanotubes (BNNTs). BNNTs have been synthesized from unprocessed colemanite for the first time. The reaction parameters such as time, catalyst type, catalyst amount and temperature were optimized. It was found that the BNNT formation follows the base growth mechanism, which was initiated with a ...

Journal: :Composites Science and Technology 2021

Tailoring the SiC fiber-matrix interface in micron-sized fibers is crucial to attaining enhanced mechanical properties ceramic reinforced composites. Herein, authors report growth of boron nitride nanotubes (BNNT) onto (SiCf), creating a fuzzy fiber architecture promote surface area for defined load path matrix and improve these structures. Successful BNNT-growth achieved by oxide chemical vapo...

2014
Kamal B. Dhungana Ranjit Pati

With the end of Moore's law in sight, researchers are in search of an alternative approach to manipulate information. Spintronics or spin-based electronics, which uses the spin state of electrons to store, process and communicate information, offers exciting opportunities to sustain the current growth in the information industry. For example, the discovery of the giant magneto resistance (GMR) ...

2017
M. A. Abass G. Singh

Polymer-derived ceramics (PDCs) such as silicon oxycarbide (SiOC) have shown promise as electrode materials for rechargeable Li-ion batteries (LIBs) owing to the synergy between their disordered carbon phase and hybrid bonds of silicon with oxygen and carbon. This study describes the synthesis and characterization of a new type of PDC composite comprising SiOC embedded with varying wt% of boron...

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