Diameter-Selective Solubilization of Carbon Nanotubes by Lipid Micelles

2008 ◽  
Vol 8 (1) ◽  
pp. 420-423 ◽  
Author(s):  
Dimitrios Tasis ◽  
Konstantinos Papagelis ◽  
Dionysios Douroumis ◽  
James R. Smith ◽  
Nikolaos Bouropoulos ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanostructures ◽  
Aqueous Suspension ◽  
Aqueous Media ◽  
Microscopy Imaging ◽  
Force Microscopy ◽  
Atomic Force ◽  
One Step ◽  
The One ◽  
Walled Carbon Nanotubes

The one-step dispersion of HiPco single-walled carbon nanotubes in aqueous media with the use of a synthetic lyso-phosphatidylcholine was studied. Solubilization occurs through wrapping of lipid molecules around the circumference of the tubes, yielding lipid monolayers on the graphitic sidewalls as evidenced by atomic force microscopy imaging and dynamic light scattering measurements. Raman spectroscopy showed that the dispersion and centrifugation process leads to an effective enrichment of the stable aqueous suspension in carbon nanostructures with smaller diameters.

scholarly journals Effects of tip-nanotube interactions on atomic force microscopy imaging of carbon nanotubes

Nano Research ◽  
2012 ◽  
Vol 5 (4) ◽  
pp. 235-247 ◽  
Author(s):  
Rouholla Alizadegan ◽  
Albert D. Liao ◽  
Feng Xiong ◽  
Eric Pop ◽  
K. Jimmy Hsia
Keyword(s):  
Carbon Nanotubes ◽  
Atomic Force Microscopy ◽  
Microscopy Imaging ◽  
Force Microscopy ◽  
Atomic Force ◽  
Atomic Force Microscopy Imaging

Identifying Individual Single-Walled and Double-Walled Carbon Nanotubes by Atomic Force Microscopy

Nano Letters ◽  
2008 ◽  
Vol 8 (11) ◽  
pp. 3568-3571 ◽  
Author(s):  
Tristan DeBorde ◽  
J. Caleb Joiner ◽  
Matthew R. Leyden ◽  
Ethan D. Minot
Keyword(s):  
Carbon Nanotubes ◽  
Atomic Force Microscopy ◽  
Force Microscopy ◽  
Atomic Force ◽  
Double Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Carbon nanotubes and metalloporphyrins and metallophthalocyanines-based materials for electroanalysis

2012 ◽  
Vol 16 (07n08) ◽  
pp. 713-740 ◽  
Author(s):  
José H. Zagal ◽  
Sophie Griveau ◽  
Mireya Santander-Nelli ◽  
Silvia Gutierrez Granados ◽  
Fethi Bedioui
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Hybrid Materials ◽  
Photoelectron Spectroscopy ◽  
State Of The Art ◽  
X Ray ◽  
Force Microscopy ◽  
Atomic Force ◽  
Transmission Electron ◽  
Walled Carbon Nanotubes

We discuss here the state of the art on hybrid materials made from single (SWCNT) or multi (MWCNT) walled carbon nanotubes and MN4complexes such as metalloporphyrins and metallophthalocyanines. The hybrid materials have been characterized by several methods such as cyclic voltammetry (CV), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM) and scanning electrochemical microscropy (SECM). The materials are employed for electrocatalysis of reactions such as oxygen and hydrogen peroxide reduction, nitric oxide oxidation, oxidation of thiols and other pollutants.

scholarly journals A Hybrid Nanoplatform of Graphene Oxide/Nanogold for Plasmonic Sensing and Cellular Applications at the Nanobiointerface

2019 ◽  
Vol 9 (4) ◽  
pp. 676 ◽  
Author(s):  
Lorena Cucci ◽  
Irina Naletova ◽  
Giuseppe Consiglio ◽  
Cristina Satriano
Keyword(s):  
Gold Nanoparticles ◽  
Graphene Oxide ◽  
Microscopy Imaging ◽  
Human Neuroblastoma ◽  
Force Microscopy ◽  
Atomic Force ◽  
Plasmonic Sensing ◽  
One Step ◽  
Spherical Gold Nanoparticles ◽  
Species Production

In this study, nanocomposites of spherical gold nanoparticles (AuNPs) and graphene oxide (GO) nanosheets were fabricated by a simple one-step reduction method. The characterisation by UV-visible spectroscopy of the plasmonic sensing properties pointed out to a strong interaction between graphene and metal nanoparticles in the hybrid GO-AuNP, as confirmed by nuclear magnetic resonance. Moreover, atomic force microscopy analyses demonstrated that the gold nanoparticles were mostly confined to the basal planes of the GO sheets. The response of the nanoassemblies at the biointerface with human neuroblastoma SH-SY5Y cell line was investigated in terms of nanotoxicity as well as of total and mitochondrial reactive oxygen species production. Confocal microscopy imaging of cellular internalization highlighted the promising potentialities of GO-AuNP nanoplatforms for theranostic (i.e., sensing/imaging + therapy) applications.

Synthesis of Carbon Nanotubes/Gold Nanoparticles Hybrids for Environmental Applications

2010 ◽  
Vol 71 ◽  
pp. 34-39
Author(s):  
L. Minati ◽  
G. Speranza ◽  
I. Bernagozzi ◽  
S. Torrengo ◽  
L. Toniutti ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Gold Nanoparticles ◽  
Photoelectron Spectroscopy ◽  
Force Microscopy ◽  
Atomic Force ◽  
Covalently Bonded ◽  
Plasmon Resonances ◽  
Multi Walled Carbon Nanotubes ◽  
Synthesis Of Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Multi-walled carbon nanotubes were chemically cut by acid treatments and then deposited on 2-aminoethanethiol-modified gold substrate by the application of an external electric field. 2-aminoethanethiol-capped gold nanoparticles were then covalently bonded to the nanotubes to exploit their plasmon resonances. Reaction intermediates as well as the final products were analyzed by X-Ray Photoelectron Spectroscopy, Atomic Force Microscopy and Scanning Electron Microscopy. The synergetic interaction between carbon nanotubes and gold nanoparticles leads to an efficient signal enhancement in Raman spectra. This is of particular interest for the detection of toxic molecules dangerous for the environment.

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