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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Book ChapterDOI
Nanostructured TiO2 layers on Ti for bone bonding
TL;DR: In this article, the authors focus on recent developments in controllable synthetic routes to achieve TiO2 layers with distinct nanostructures of oriented nanotubes, nanorods, nanowires, branched nanowsires, nanoflowers, etc., for bone bonding.
Journal ArticleDOI
First-principle calculations of electronic structure and dielectric function of rutile TiO2 under hydrostatic pressure
Lugang Cai,Chunbao Liu +1 more
TL;DR: In this paper, the electronic structure and optical properties of rutile TiO2 under hydrostatic pressure are reported based on the first-principle calculations, and the results indicate that both the lattice constants and the volume of TiO 2 decrease with pressure increasing; however, the ratio of c/a is almost unchanged in such a case and the TiO6 octahedron in the unit cell transforms into regular octahedral at about 220 GPa.
Journal ArticleDOI
Synthesis, Characterization and Thermal Stability of Highly Crystallized Titania Nanotubes
Bed Poudel,Wenzhong Wang,Chris Dames,Jian Yu Huang,Shankar Kunwar,Dezhi Wang,Debasish Banerjee,Gang Chen,Zhifeng Ren +8 more
TL;DR: In this article, the crystallization, structure, and phase stability of titania nanotubes at high temperatures were systematically studied, and a morphology change from nanotube to nanowire was observed at 650°C.
Book ChapterDOI
Photocatalytic Degradation of Waste Liquid from Biomass Gasification in Supercritical Water with Simultaneous Hydrogen Production over CdS Sensitized Na2Ti2O4(OH)2
Journal ArticleDOI
Self-Seeding Synthesis of Hierarchically Branched Rutile TiO2 for High-Efficiency Dye-Sensitized Solar Cells
TL;DR: In this paper , a room temperature-based wet-chemical technique for the self-seeding preparation of three-dimensional (3D) hierarchically branched rutile TiO2, abbreviated HTs, employing titanate nanotubes as the precursor was presented.
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.