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
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Patent
Nanostructured titanium oxide material and its synthesis procedure
José Antonio Toledo Antonio,Carlos Angeles Chavez,María Antonia Cortés Jacome,Fernando Alvarez Ramirez,Yosadara Ruiz Morales,Gerardo Ferrat Torres,Luis Francisco Flores Ortiz,Esteban Lopez Salinas,Marcelo Lozada y Cassou +8 more
TL;DR: In this article, the authors describe nanomaterials of the JT phase of the titanium oxide TiO2-x, where 0≦x≦1 having as a building block a crystalline structure with an orthorhombic symmetry and described by at least one of the space groups 59 Pmmn, 63 Amma, 71 Immm or 63 Bmmb.
Journal ArticleDOI
Optimization of the Alkaline Hydrothermal Route to Titanate Nanotubes by a Doehlert Matrix Experience Design
TL;DR: In spite of the controversy about the chemical structure and formation mechanism of hydrogenotitanates nanotubes (HNTs) through a basic hydrothermal treatment of TiO2, HNTs are still the subject of...
Journal ArticleDOI
Preparation and phase transformation of highly ordered TiO2 nanodot arrays on sapphire substrates
TL;DR: In this article, ordered nanodot arrays of titanium oxide (TiO2) were prepared from an epitaxial Al/TiN bilayered film on a sapphire substrate by electrochemical anodization of the TiN layer using a nanoporous anodic aluminum oxide (AAO) film as the template.
Journal ArticleDOI
Photoluminescence of samarium-doped TiO2 nanotubes
Dong Jin Park,Tohru Sekino,Satoshi Tsukuda,Asuka Hayashi,Takafumi Kusunose,Shun Ichiro Tanaka +5 more
TL;DR: In this paper, the binding energy of Sm {sup 3}d{sub 5/2} for 10 mol% Sm-doped nanotubes (1088.3 eV) was chemically shifted from that of Sm{sub 2}O{sub 3} (1087.5 eV), showing that Sm existed in the TiO-sub 2 lattice.
Journal ArticleDOI
Mechanochemical Forces as a Synthetic Tool for Zero- and One-Dimensional Titanium Oxide-Based Nano-photocatalysts
TL;DR: All the available examples in which the utilization of sonochemistry or ball milling had unique effects as a synthesis tool towards zero- or one-dimensional nanostructures of a semiconductor which is assumed as a benchmark in photocatalysis, titanium dioxide are collected.
References
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Journal ArticleDOI
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.
Book
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.