نتایج جستجو برای: multiwalled carbon

تعداد نتایج: 281254  

Journal: :Chemphyschem : a European journal of chemical physics and physical chemistry 2001
R L Whitby W K Hsu C B Boothroyd P K Fearon H W Kroto D R Walton

An insulated nanotube wire is formed by the binary phase of layered tungsten disulphide and carbon nanotubes (shown in the HRTEM image) generated by the sulphidization of tungsten oxide coated multiwalled carbon nanotubes at 900 °C. Thermogravimetric analysis shows that the tungsten disulphide coat acts as an antioxidant.

Journal: :Nanomaterials and Nanotechnology 2022

Keywords nanoparticles, multiwalled carbon nanotubes, graphene, 2D layered materials, perovskites, surface plasmon resonance, photonic crystals, sensors

2005
G. Ovejero J. L. Sotelo M. D. Romero A. Rodríguez C. Diaz M. Corrias P. Kalck J. Garcia H. T. Gomes P. Serp F. L. Figueiredo F. L. Faria

The high external surface area leads to a significant increase in the surface contact between the gaseous or liquid reactants and the active phase supported on this nanostructured host which is a prerequisite for its use as catalyst support, especially in liquid phase medium where diffusion rate is predominant [2]. Also, the strong interactions between the exposed prismatic planes and the depos...

Journal: :Physical review letters 2004
K Svensson H Olin E Olsson

Here we demonstrate, for the first time experimentally, a nanopipette action for metals using multiwalled carbon nanotubes. The process relies on electromigration forces, created at high electron current densities, enabling the transport of material inside the hollow core of carbon nanotubes. In this way nanoparticles of iron were transported to and from electrically conducting substrates.

Journal: :Nanoscale 2010
Brett L Allen Matthew B Keddie Alexander Star

Analogous to multiwalled carbon nanotubes, nitrogen-doped carbon nanotube cups (NCNCs) have been synthesized with defined volumetric parameters (diameter and segment lengths) by controlling the catalyst particle size and the concentration of nitrogen precursor utilized in the chemical vapor deposition (CVD) reaction, allowing for tailored interior cavity space of cross-linked NCNCs, i.e. nanoca...

Journal: :Chemical communications 2008
Hanene Ali-Boucetta Khuloud T Al-Jamal David McCarthy Maurizio Prato Alberto Bianco Kostas Kostarelos

Multiwalled carbon nanotube aqueous dispersions using block copolymers are able to form supramolecular complexes with the aromatic chromophore and anticancer agent doxorubicin via pi-pi stacking and enhance its cytotoxic activity.

Journal: :Chemical communications 2012
Giovanni Grassi Angela Scala Anna Piperno Daniela Iannazzo Maurizio Lanza Candida Milone Alessandro Pistone Signorino Galvagno

This work reports for the first time a straightforward solvent-free chemical procedure to gain access to Δ-1-pyrroline grafted onto multiwalled carbon nanotubes by the 1,3-dipolar cycloaddition of the mesoionic 4-methyl-2-phenyloxazol-5(4H)-one.

Journal: :Chemical communications 2005
M Dehonor K Masenelli-Varlot A González-Montiel C Gauthier J Y Cavaillé H Terrones M Terrones

Polymer brushes consisting of polystyrene (PS) chains bonded covalently to N-doped multiwalled carbon nanotubes (CNx) were synthesized by a "grafting from" route using nitroxide mediated radical polymerization (NMRP).

Journal: :Chemical communications 2005
Betul Yurdumakan Nachiket R Raravikar Pulickel M Ajayan Ali Dhinojwala

We report a fabrication process for constructing polymer surfaces with multiwalled carbon nanotube hairs, with strong nanometer-level adhesion forces that are 200 times higher than those observed for gecko foot-hairs.

Journal: :Chemical communications 2012
Julio C Zuaznabar-Gardona Roberto Cao Roberto Cao Margarita Suarez

Multiwalled carbon nanotubes modified with 2-aminoethanethiol (MWNT-AET) were vertically self-assembled on gold electrodes with the assistance of chitosan and Tween. According to AFM and cyclic voltammetric determinations the best results were achieved using chitosan.

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