نتایج جستجو برای: carbon nanotubes

تعداد نتایج: 286785  

ژورنال: سلامت کار ایران 2013
ابراهیمی, علی, شیرخانلو, حمید, فقیهی زرندی, علی, بانشی, محمد رضا , کیان, محمد جواد, گلبابایی, فریده ,

Background and aims: Sampling of toxic mercury vapors (Hg0) is necessary for determination of occupational exposure levels of workers exposed to this contaminant. Given the tendency of carbon nanotubes for mercury adsorption, carbon nanotubes can be expected to be suitable sampling media for mercury. The aim of this study was to compare the performance of multi-walled and single-walled carbon n...

2002
T. Werder J. H. Walther

Molecular dynamics simulations are used to study the hydrophobic-hydrophilic behavior of carbon nanotubes in water. We report contact angles for tube diameters ranging from 25 to 75 Å and for droplets containing up to 4632 water molecules. Furthermore, we investigate the interaction between two carbon nanotubes immersed in water and we extract a the hydration acting between the tubes. We find t...

Journal: :Physical chemistry chemical physics : PCCP 2013
Anindya Majumder Maryam Khazaee Jörg Opitz Eckhard Beyer Larysa Baraban Gianaurelio Cuniberti

Here we present a hybrid approach to functionalize multi-walled carbon nanotubes in aqueous solution, exploring a non-covalent binding strategy. We focus on formation of hybrid complexes consisting of carbon nanotubes decorated by single stranded DNA, non-covalently attached using surfactants as intermediate layers. Unlike single walled carbon nanotubes, revealing easy side wall wrapping of DNA...

2015
Suoming Zhang Le Cai Tongyu Wang Rongmei Shi Jinshui Miao Li Wei Yuan Chen Nelson Sepúlveda Chuan Wang

This paper exploits the chirality-dependent optical properties of single-wall carbon nanotubes for applications in wavelength-selective photodetectors. We demonstrate that thin-film transistors made with networks of carbon nanotubes work effectively as light sensors under laser illumination. Such photoresponse was attributed to photothermal effect instead of photogenerated carriers and the conc...

Journal: :Journal of the American Society for Mass Spectrometry 2005
Chensong Pan Songyun Xu Hanfa Zou Zhong Guo Yu Zhang Baochuan Guo

A method with carbon nanotubes functioning both as the adsorbent of solid-phase extraction (SPE) and the matrix for matrix assisted laser desorption/ionization mass spectrometry (MALDI-MS) to analyze small molecules in solution has been developed. In this method, 10 microL suspensions of carbon nanotubes in 50% (vol/vol) methanol were added to the sample solution to extract analytes onto surfac...

Journal: :Nature nanotechnology 2010
Valerian E Kagan Nagarjun V Konduru Weihong Feng Brett L Allen Jennifer Conroy Yuri Volkov Irina I Vlasova Natalia A Belikova Naveena Yanamala Alexander Kapralov Yulia Y Tyurina Jingwen Shi Elena R Kisin Ashley R Murray Jonathan Franks Donna Stolz Pingping Gou Judith Klein-Seetharaman Bengt Fadeel Alexander Star Anna A Shvedova

We have shown previously that single-walled carbon nanotubes can be catalytically biodegraded over several weeks by the plant-derived enzyme, horseradish peroxidase. However, whether peroxidase intermediates generated inside human cells or biofluids are involved in the biodegradation of carbon nanotubes has not been explored. Here, we show that hypochlorite and reactive radical intermediates of...

قاسمی, احمدرضا, محمدی, محمد,

In this study, Circular Disk Model (CDM) has been developed to determine the residual stresses in twophase and three- phase unit cell. The two-phase unit cell is consisting of carbon fiber and matrix. The three-phase unit cell is consisting of carbon fiber, carbon nanotubes and matrix in which the carbon fiber is reinforced with the carbon nanotube using electrophoresis method. For different vo...

2012
Shelby B. Hutchens Alan Needleman Julia R. Greer

Related Articles Distinguishing defect induced intermediate frequency modes from combination modes in the Raman spectrum of single walled carbon nanotubes J. Appl. Phys. 111, 064304 (2012) Effect of bending buckling of carbon nanotubes on thermal conductivity of carbon nanotube materials J. Appl. Phys. 111, 053501 (2012) Nanotorsional actuator using transition between flattened and tubular stat...

2011
R. Md Nor

The merit of various kinds of carbon nanotubes as field electron emission cathode materials has been studied. The field electron emission characteristics of electrophoretically deposited films of single walled carbon nanotubes, multiwalled carbon nanotubes of diameter between 10 and 20 and .50 nm and carbon nanofibres with diameters between 200 and 600 nm were investigated. Results of the measu...

Journal: :international journal of nanoscience and nanotechnology 2015
f. pourfayaz s. iranpour o. shojaei

toluene and benzene were eliminated using multi-walled carbon nanotubes (mwcnts). in order to investigate influence of acid treatment on the mwcnts adsorption capacities, the mwcnts were functionalized by nitric acid (10 m) under reflux conditions for 2 h. fourier transform infrared (ftir) and raman spectroscopy were employed to confirm the formation of functional groups on the nanotubes surfac...

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