Journal ArticleDOI
Preparation and structure analysis of titanium oxide nanotubes
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In this paper, the atomic structure of the synthesized tubular material is imaged by high-resolution transmission electron microscopy (HRTEM), and the composition of individual tubular structures is determined using selected area energy dispersive X-ray spectroscopy (EDX).Abstract:
Well crystallized nanoscale tubular materials have been synthesized via the reaction of TiO2 crystals of either anatase or rutile phase and NaOH aqueous solution. The atomic structure of the synthesized tubular material is imaged by high-resolution transmission electron microscopy (HRTEM), and the composition of individual tubular structures is determined using selected area energy dispersive X-ray spectroscopy (EDX). Our results show that the tubular materials are well crystallized tubes with an average diameter of about 9 nm and little dispersion, and are composed of mainly titanium and oxygen. The atomic ratio of O/Ti is found, however, to vary from tube to tube. Detailed electron and x-ray diffraction studies show that the structure of our titanium oxide nanotubes do not agree with those made of TiO2 crystals with either anatase or rutile phase. HRTEM observations revealed that the titanium oxide nanotubes usually have multiple shells, in analogy with multiwalled carbon nanotubes, but the shell spacin...read more
Citations
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Journal ArticleDOI
Orientation effects in morphology and electronic properties of anatase TiO2 one-dimensional nanostructures. II. Nanotubes
Dmitri B. Migas,A. B. Filonov,Victor E. Borisenko,Natalia V. Skorodumova,Natalia V. Skorodumova +4 more
TL;DR: A model to explain the band-gap variation with size in TiO2 nanowires, nanocrystals and thin films is proposed and it is shown to display rather complex behavior characterized by a competition between quantum confinement and surface state effects.
Journal ArticleDOI
Energy minimization of single-walled titanium oxide nanotubes.
TL;DR: Nanotubes with the trititanate structure are revealed to be the most stable (at unit activity for water) and chiral nanotubes made from (101) sheets of anatase are the lowest in energy, suggesting that this is the most likely structure for nanot tubes synthesized at low water chemical potential.
Journal ArticleDOI
Synthesis, characterization and optical spectroscopy of Eu3+ doped titanate nanotubes
Patricia Haro-González,Marco Pedroni,Fabio Piccinelli,Leopoldo L. Martin,Stefano Polizzi,Marco Giarola,Gino Mariotto,Adolfo Speghini,Marco Bettinelli,Inocencio R. Martín +9 more
TL;DR: In this article, the synthesis of Eu 3 þ doped titania nanotubes was carried out via a hydrothermal method and X-ray diffraction and transmission electron microscopy analyses showed that the nanotsubes were formed by rolling multilayered titania structure with a length of up to 100 nm.
Journal ArticleDOI
Nanostructure Transition on Anodic Titanium: Structure Control via a Competition Strategy between Electrochemical Oxidation and Chemical Etching
TL;DR: In this paper, the authors investigated the nanostructure transition on anodic Ti and put forward a novel physical model to systematically explain the formation mechanism and discuss the relevant influential factors, which revealed that the available nanostructures are dominated by a competition strategy between electrochemical oxidation and chemical etching reactions.
Journal ArticleDOI
Photoelectrocatalytic treatment of pentachlorophenol in aqueous solution using a rutile nanotube-like TiO2/Ti electrode
TL;DR: The experimental results showed that PCP could be degraded more efficiently by a photoelectrocatalytic process than by a photocatalytic or electrochemical oxidation alone and a significantphotoelectrochemical synergetic effect was observed.
References
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Helical microtubules of graphitic carbon
TL;DR: Iijima et al. as mentioned in this paper reported the preparation of a new type of finite carbon structure consisting of needle-like tubes, which were produced using an arc-discharge evaporation method similar to that used for fullerene synthesis.
Journal ArticleDOI
Room-temperature transistor based on a single carbon nanotube
TL;DR: In this paper, the fabrication of a three-terminal switching device at the level of a single molecule represents an important step towards molecular electronics and has attracted much interest, particularly because it could lead to new miniaturization strategies in the electronics and computer industry.
Book
Physical properties of carbon nanotubes
TL;DR: In this paper, an introductory textbook for graduate students and researchers from various fields of science who wish to learn about carbon nanotubes is presented, focusing on the basic principles behind the physical properties and giving the background necessary to understand the recent developments.
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Science of fullerenes and carbon nanotubes
TL;DR: In this paper, the authors present a detailed overview of the properties of Fullerenes and their properties in surface science applications, such as scanning tunnel microscopy, growth and fragmentation studies, and chemical synthesis.
Journal ArticleDOI
Boron Nitride Nanotubes
Nasreen G. Chopra,R. J. Luyken,K. Cherrey,Vincent H. Crespi,Marvin L. Cohen,Steven G. Louie,Alex Zettl +6 more
TL;DR: Electron energy-loss spectroscopy on individual tubes yielded B:N ratios of approximately 1, which is consistent with theoretical predictions of stable BN tube structures.