Fabrication Of Carbon Nanoribbons Via Chemical Treatment Of Carbon Nanotubes And Their Self-Assembling.

2015 ◽  
Vol 1752 ◽  
pp. 71-75
Author(s):  
P. Y. Arquieta Guillén ◽  
Edgar de Casas Ortiz ◽  
Oxana Kharissova
Keyword(s):  
Carbon Nanotubes ◽  
Scanning Transmission Electron Microscopy ◽  
Near Infrared ◽  
Infrared Region ◽  
Medical Field ◽  
Multilayer Carbon Nanotubes ◽  
Self Assembling ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Potential Applications

ABSTRACTSome potential applications of the nanoribbons and nanorods occur in the medical field, using gold nanoribbon therapies against cancer cells because they have absorption in the near infrared region. In this paper, the nanoribbons were obtained by physical-chemical method based on multilayer carbon nanotubes functionalized with carboxylic radical groups (-COOH). The obtained material was characterized by Scanning Transmission Electron Microscopy (STEM) and Infrared Spectroscopy (FTIR). The obtained nanoribbons have a diameter of 320 nm with preferably 126° angle in their morphology.

Growth behavior and structures of carbon nanotubes

1993 ◽  
Vol 51 ◽  
pp. 752-753
Author(s):  
Mingqi Liu ◽  
John M. Cowley
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Transmission Electron Microscopy ◽  
Scanning Transmission Electron Microscopy ◽  
Arc Discharge ◽  
The Novel ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Potential Applications ◽  
Discharge Method

Recent discovery of the novel hollow graphitic tubules of nanometer dimensions, so called carbon nanotubes, has greatly stimulated the studies in the field of carbon fiber growth. Their potential applications in electronic and materials industries have been suggested. In the present study, carbon nanotubes were fabricated by an arc-discharge method. The microstructures of nanotubes thus obtained were examined with a JEM-2000FX high-resolution transmission electron microscopy (HRTEM) and with an electron nanodiffraction technique in a VG HB-5 scanning transmission electron microscopy (STEM).HRTEM images show that nanotubes, consisting of 3 to 30 carbon sheets, have a length up to 1 μm and a diameter of 6 to 26 nm. Some nanotubes have a symmetric uniform sheet spacing of 0.34 nm. Others show non-symmetric uneven fringes (Fig. 1), indicating that they may have a polyhedral cross section. Most nanotubes are closed by cone-like or polyhedral shaped caps (Figs. 2 and 3). The closure angle varies from 17 to 40° and the internal sheets have a tendency to be closed in pairs. Fig. 4 shows the image of a growing tubes.

scholarly journals Filling Single Wall Carbon Nanotubes with Metal Chloride and Metal Nanowires and Imaging with Scanning Transmission Electron Microscopy

2001 ◽  
Vol 706 ◽  
Author(s):  
Satishkumar B. Chikkannanavar ◽  
Andreas Taubert ◽  
David E. Luzzi
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Transmission Electron Microscopy ◽  
Scanning Transmission Electron Microscopy ◽  
Metal Chloride ◽  
Single Wall Carbon Nanotubes ◽  
Metal Nanowires ◽  
Scanning Transmission Electron ◽  
Transmission Electron ◽  
Scanning Transmission

AbstractNanowires of magnetic metals (Ho, Gd) have been synthesized inside the hollow interior of single wall carbon nanotubes by the sealed-tube reaction. Amongst the d- and f-series metal chlorides investigated in this study, HoCl3 and GdCl3 fill the SWNTs to a significantly higher extent than FeCl2 and CoCl2. HoCl3 and GdCl3 nanowires have been transformed into the respective metal nanowires via the reduction of the chloride nanowires. The nanowires have been imaged using high-resolution transmission electron microscopy and scanning transmission electron microscopy (STEM). X-ray energy dispersive spectroscopy carried out in conjunction with STEM confirmed the presence of metal chloride and metal nanowires.

Synthesis of Colloidal Gold Nanorods with Plasmon Absorbance Wavelength in the Near Infrared Region

MRS Advances ◽  
2016 ◽  
Vol 1 (30) ◽  
pp. 2181-2186 ◽  
Author(s):  
Luis M. Angelats-Silva ◽  
David Asmat-Campos ◽  
Henry León-León ◽  
Kevin A. Wilkinson ◽  
Daniel A. Sánchez-Vaca ◽  
...  
Keyword(s):  
Silver Nitrate ◽  
Gold Nanorods ◽  
Colloidal Gold ◽  
Near Infrared ◽  
Infrared Region ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Absorbance Peak ◽  
Silver Nitrate Concentration

ABSTRACTWe report preparation and characterization of colloidal gold nanorods (AuNR) with plasmon absorbance over 950 nm and an aspect ratio of 7.2 by tuning silver nitrate concentration and the CTAB/BDAC ratio during growth. Samples were analyzed by scanning transmission electron microscopy, X-ray diffraction, UV-vis absorption spectroscopy and measurement of zeta potential. Addition of 170 μM silver nitrate to the CTAB-containing reaction mixture allowed preparation of AuNRs with a maximum absorbance peak at 941.8 nm and a yield around 96%. Optimization of the BDAC/CTAB ratio allowed for a further redshift of the absorbance maximum to 954.0 nm, but with poorer yields.

scholarly journals Emergent properties at oxide interfaces controlled by ferroelectric polarization

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Fan Ye ◽  
Yi Zhang ◽  
Christopher Addiego ◽  
Mingjie Xu ◽  
Huaixun Huyan ◽  
...  
Keyword(s):  
Scanning Transmission Electron Microscopy ◽  
Ferroelectric Materials ◽  
Ferroelectric Polarization ◽  
Emergent Properties ◽  
Oxide Interfaces ◽  
Transmission Electron ◽  
Fundamental Understanding ◽  
Scanning Transmission ◽  
Potential Applications ◽  
Applied Fields

AbstractFerroelectric materials are characterized by the spontaneous polarization switchable by the applied fields, which can act as a “gate” to control various properties of ferroelectric/insulator interfaces. Here we review the recent studies on the modulation of oxide hetero-/homo-interfaces by ferroelectric polarization. We discuss the potential applications of recently developed four-dimensional scanning transmission electron microscopy and how it can provide insights into the fundamental understanding of ferroelectric polarization-induced phenomena and stimulate future computational studies. Finally, we give the outlook for the potentials, the challenges, and the opportunities for the contribution of materials computation to future progress in the area.

Hybrid Materials Based on Multi-walled Carbon Nanotubes with Antimicrobial Properties

2018 ◽  
Vol 69 (10) ◽  
pp. 2625-2632
Author(s):  
Daniela Ionita ◽  
Camelia Ungureanu ◽  
Mariana Prodana ◽  
Andrada Maria Negru ◽  
Marius Enachescu
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Scanning Transmission Electron Microscopy ◽  
Reference Sample ◽  
Antimicrobial Properties ◽  
Carboxyl Groups ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

In the present paper were prepared four types of sample consisting of multi-walled carbon nanotubes functionalized with carboxyl groups (MWCNT-COOH being the reference sample) and further functionalized with ZnCl2, MgCl2, AgNO3 and CuCl2. The samples were submitted to scanning electron microscopy (SEM), Raman microscopy, scanning transmission electron microscopy (STEM), and determined the antimicrobial character.

A Structure and Morphology of Nanocomposites Composed of Carbon Nanotubes with a Varying Fraction of Platinum Nanoparticles

2014 ◽  
Vol 939 ◽  
pp. 3-10 ◽  
Author(s):  
Anna Danuta Dobrzańska-Danikiewicz ◽  
Mirosława Pawlyta ◽  
Dariusz Łukowiec
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Transmission Electron Microscopy ◽  
Standard Deviation ◽  
Platinum Nanoparticles ◽  
Scanning Transmission Electron Microscopy ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
20 Nm ◽  
Metallic Impurities

A structure of nanocomposite materials consisting of carbon nanotubes with a varying fraction of platinum nanoparticles (5, 10 and 20 wt %) is compared in the paper. High-quality CNTs obtained in the CVD process, 100-200 mm long with a standard deviation of below 20% and with a diameter of 10-20 nm, with a standard deviation of below 30%, were used in the research. Raw CNTs did not contain metallic impurities or amorphous carbon deposits. An indirect method of bonding the earlier produced platinum nanoparticles to the surface of functionalised carbon nanotubes was employed to deposit platinum nanoparticles onto the surface of carbon nanotubes. A full array of changes in the loading of carbon nanotubes’ surface with platinum nanoparticles was achieved as a result of the experiments performed, starting with homogenous deposition to the clearly developed large agglomerations of platinum nanoparticles. The studies carried out using scanning electron microscopy, transmission electron microscopy, scanning transmission electron microscopy and X-ray structural analysis have confirmed differences in the morphology, homogeneity and density of coating the carbon nanotubes’ surface with variedly concentrated platinum nanoparticles. Differences were also revealed in the structure of the newly formed nanocomposites. A nanocomposite with a 5% fraction of platinum nanoparticles demonstrates the best structure-related properties for the materials obtained.

Preparation of Palm Oil Based Carbon Nanotubes at Various Ferrocene Concentration

2011 ◽  
Vol 364 ◽  
pp. 408-411 ◽  
Author(s):  
M. S. Azmina ◽  
A.B. Suriani ◽  
A.N. Falina ◽  
M. Salina ◽  
J. Rosly ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Scanning Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Palm Oil ◽  
Scanning Transmission Electron Microscopy ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Prominent Peak ◽  
Scanning Electron

In this work, different ferrocene concentration (1.0-8.0 wt%) of bio-hydrocarbon palm oil precursor were utilized to investigate its effect on the characteristics of the produced carbon nanotubes (CNT). The palm oil-ferrocene mixture was vaporized at 450°C and pyrolyzed at 800°C for 30 min time in argon ambient. The CNT were analyzed using field emission scanning electron microscopy, scanning transmission electron microscopy, fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis. The analysis confirmed different diameter and morphologies of CNT were formed when different ferrocene concentration were used. FTIR spectra show the prominent peak at ~1445, 1736, 2851 and 2925 cm-1that are identified as CNT and C–Hxrespectively.

Direct evidence of 2H hexagonal Si in Si nanowires

Nanoscale ◽  
2019 ◽  
Vol 11 (11) ◽  
pp. 4846-4853 ◽  
Author(s):  
Zhanbing He ◽  
Jean-Luc Maurice ◽  
Qikai Li ◽  
Didier Pribat
Keyword(s):  
Scanning Transmission Electron Microscopy ◽  
Silicon Nanowire ◽  
Chemical Vapor ◽  
Dark Field ◽  
Si Nanowires ◽  
Transmission Electron ◽  
Wide Range ◽  
Scanning Transmission ◽  
Annular Dark Field ◽  
Potential Applications

Hexagonal Si (2H polytype) has attracted great interest because of its unique physical properties and wide range of potential applications. Here, through the use of atomic resolution high-angle annular dark-field scanning transmission electron microscopy, we unambiguously report the coherent intergrowth of diamond cubic (3C polytype) and 2H hexagonal Si in a silicon nanowire grown by chemical vapor deposition.

Structure of Nanocomposites Based on Carbon Nanotubes Decorated with Platinum Nanoparticles

2014 ◽  
Vol 783-786 ◽  
pp. 1503-1508 ◽  
Author(s):  
Anna Danuta Dobrzańska-Danikiewicz ◽  
Mirosława Pawlyta ◽  
Dariusz Łukowiec
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Transmission Electron Microscopy ◽  
Platinum Nanoparticles ◽  
Scanning Transmission Electron Microscopy ◽  
Structure And Morphology ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
20 Nm ◽  
Metallic Impurities

A structure and morphology of the fabricated nanocomposite materials composed of carbon nanotubes and platinum nanoparticles is reported in the paper. High quality CNTs obtained in the CVD process with a long of 100-200 mm and diameter of 10-20 nm were used in the research. Raw CNTs did not contain metallic impurities or amorphous carbon deposits. An indirect method of bonding the earlier produced platinum nanoparticles to the surface of functionalised carbon nanotubes was used to produce carbon nanotubes – platinum nanoparticles system. The main aim of current research was structure and morphology investigation of obtained nanocomposite using Transmission Electron Microscopy (TEM), Scanning Transmission Electron Microscopy (STEM) and X-ray structure analysis (XRD).

Sign in / Sign up

Export Citation Format

Share Document