نتایج جستجو برای: bnnts fibers

تعداد نتایج: 70644  

Journal: :ACS nano 2011
Lenke Horváth Arnaud Magrez Dmitri Golberg Chunyi Zhi Yoshio Bando Rita Smajda Endre Horváth László Forró Beat Schwaller

Nanotubes present one of the most promising opportunities in nanotechnology with a plethora of applications in nanoelectronics, mechanical engineering, as well as in biomedical technology. Due to their structure and some physical properties, boron nitride (BN) nanotubes (BNNTs) possess several advantages over carbon nanotubes (CNTs), and they are now commercially produced and used on a large sc...

Journal: : 2021

Boron nitride nanotubes (BNNTs) have many application areas thanks to their superior properties such as thermal and electrical insulation, resistance oxidation, high hydrophobicity, hydrogen storage capacity, well biocompatible properties. Therefore, new synthesis methods are being searched for BNNT with increasing interest in recent years. In this study, purity yield BNNTs were synthesized usi...

Journal: :International Journal of Energy Research 2023

Since boron nitride nanotubes (BNNTs) were first manufactured, they have gained considerable attention for their wide-scale application as reinforcing composites, piezoelectric materials, electrical insulating thermal conductors, and neutron shielding materials because of excellent mechanical, electrical, thermal, absorption properties. Despite the remarkable properties broad scope BNNTs, use h...

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...

In the present research, nonlinear vibration in a coupled system of Boron-Nitride nano-tube reinforced composite (BNNTRC) oil pipes is studied. Single-walled Boron-Nitride nano-tubes (SWBNNTs) are arranged in a longitudinal direction inside Poly-vinylidene fluoride (PVDF) matrix. Damping and shearing effects of surrounded medium are taken into account by visco-Pasternak model. Based on piezoele...

Journal: :Jurnal teknologi 2022

In this report, a density functional theory (DFT) computational approach was used to investigate the structural and electronic properties of molecular hydrogens adsorbed on single-walled boron nitride nanotubes (BNNTs) with/without doped by group IV elements, such as carbon (C), silicon (Si), germanium (Ge) atom. The twelve hydrogen molecules (H2) were added outer surfaces BNNT frameworks. Geom...

Journal: :Physical chemistry chemical physics : PCCP 2014
Yunfang Li

Molecular mechanics results show that a hexagonal boron nitride (h-BN) membrane can spontaneously assemble on the single-walled boron nitride nanotube (BNNT) in a scroll or helical manner, showing an interesting dependence on h-BN width. The size of BNNTs should meet the required conditions to guarantee self-assembly. Further analyses of energy components and structural geometry show that this ...

Journal: :journal of computational applied mechanics 0
ali ghorbanpour arani 1. institute of nanoscience & nanotechnology, university of kashan, iran 2. department of mechanical engineering, university of kashan, iran elham haghparast department of mechanical engineering, university of kashan, iran zahra khoddami maraghi department of mechanical engineering, university of kashan, iran

in the present research, nonlinear vibration in a coupled system of boron-nitride nano-tube reinforced composite (bnntrc) oil pipes is studied. single-walled boron-nitride nano-tubes (swbnnts) are arranged in a longitudinal direction inside poly-vinylidene fluoride (pvdf) matrix. damping and shearing effects of surrounded medium are taken into account by visco-pasternak model. based on piezoele...

Journal: :Nano letters 2014
Jonathan Garel Chong Zhao Ronit Popovitz-Biro Dmitri Golberg Wenlong Wang Ernesto Joselevich

Owing to their mechanically tunable electronic properties, carbon nanotubes (CNTs) have been widely studied as potential components for nanoelectromechanical systems (NEMS); however, the mechanical properties of multiwall CNTs are often limited by the weak shear interactions between the graphitic layers. Boron nitride nanotubes (BNNTs) exhibit a strong interlayer mechanical coupling, but their ...

2014
Amanda L. Tiano Cheol Park Joseph W. Lee Hoa H. Luong Luke J. Gibbons Sang-Hyon Chu Samantha I. Applin Peter Gnoffo Sharon Lowther Hyun Jung Kim Paul M. Danehy Jennifer A. Inman Stephen B. Jones Jin Ho Kang Godfrey Sauti Sheila A. Thibeault Vesselin Yamakov Kristopher E. Wise Ji Su Catharine C. Fay

Scientists have predicted that carbon’s immediate neighbors on the periodic chart, boron and nitrogen, may also form perfect nanotubes, since the advent of carbon nanotubes (CNTs) in 1991. First proposed then synthesized by researchers at UC Berkeley in the mid 1990’s, the boron nitride nanotube (BNNT) has proven very difficult to make until now. Herein we provide an update on a catalyst-free m...

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