Image Restoration of One-Dimensional HgTe Crystals Formed within Single Walled Carbon Nanotubes

Sloan, Jeremy; Carter, Robin; Kirkland, Angus I.; Meyer, Rüdiger R.; Vlandas, Alexis; Green, Malcolm L.H.; Hutchison, John L.

doi:10.4028/www.scientific.net/MSF.514-516.1131

Paper Titles

Layer-by-Layer Deposition of Organically Capped Quantum Dots
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Effect of the Matrix on the 1.5μm Photoluminescence of Er-Doped Silicon Quantum Dots
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Ion Beam Analysis of Ge/Si Dots Grown on Ultrathin SiO₂ Interlayers
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Dispersion of Carbon Nanotubes in Polycarbonate and Its Effect on the Composite Properties
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Image Restoration of One-Dimensional HgTe Crystals Formed within Single Walled Carbon Nanotubes
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Terbiumpolyoxotungstate Anions as Building Units to Fabricate Nanostructured Films
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Influence of the Crystallographic Orientation on the Mechanical Behaviour of Sputtered Silver Thin Films
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Short-Range Effects and Magnetization Reversal in Co₈₀ Fe₂₀ Thin Films: A MOKE Magnetometry/ Domain Imaging and AMR Study
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HomeMaterials Science ForumAdvanced Materials Forum IIIImage Restoration of One-Dimensional HgTe Crystals...

Image Restoration of One-Dimensional HgTe Crystals Formed within Single Walled Carbon Nanotubes

Abstract:

Restored high resolution transmission electron microscopy (HRTEM) images have been recorded from 1D semiconductor crystals formed within narrow diameter (ca. 1.4 nm) single walled carbon nanotubes (SWNTs). Two unique projections were obtained from separate crystal fragments encapsulated within separate nanotubes that has facilitated the reconstruction of the three dimensional arrangement of atoms within the two encapsulated fragments.

Info:

Periodical:

Materials Science Forum (Volumes 514-516)

Main Theme:

Advanced Materials Forum III

Edited by:

Paula Maria Vilarinho

Pages:

1131-1134

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.514-516.1131

Citation:

J. Sloan et al., "Image Restoration of One-Dimensional HgTe Crystals Formed within Single Walled Carbon Nanotubes", Materials Science Forum, Vols. 514-516, pp. 1131-1134, 2006

Online since:

May 2006

Authors:

Jeremy Sloan, Robin Carter, Angus I. Kirkland, Rüdiger R. Meyer, Alexis Vlandas, Malcolm L.H. Green, John L. Hutchison

Keywords:

Carbon Nanotube (CN), High Resolution Transmission Electron Microscopy, Image Restoration, Mercury Telluride

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References

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Paper TitlePages

SiC Crystal Growth by Sublimation Method with Modification of Crucible and Insulation Felt Design

Authors: Jung Kyu Kim, Kap Ryeol Ku, Dong Jin Kim, Sang Phil Kim, Won Jae Lee, Byoung Chul Shin, Geun Hyoung Lee, Il Soo Kim

Abstract: SiC crystal boules with different shapes were prepared using sublimation physical vapor transport technique (PVT) and then their crystal quality was systematically investigated. The temperature distribution in the growth system and the crystal shape were controlled by modification of crucible and insulation felt design, which was successfully simulated using “Virtual Reactor” for flat structure design and concave structure design. The SiC polytype proved to be the n-type 6H-SiC from the typical absorption spectrum of SiC crystal. The defect density of SiC crystal boules with concave structure was slightly lower than that of flat structure and the crystal quality of SiC crystal boules with both flat structure and concave structure was significantly improved as the SiC crystal grows during the PVT methods.

Bridgman Growth of a Novel Piezoelectric Single-Crystal Material: Ca₃NbGa₃Si₂O₁₄

Authors: An Hua Wu, Jia Yue Xu, Juan Zhou, Bao Liang Lu, Xian Jun Wu, Xin Hua Li, Guo Xing Qian

Abstract: Langasite (La3Ga5SiO14, LGS) and its isomorphs, were regarded as potential substrate materials for surface acoustic wave (SAW) and bulk acoustic wave (BAW) applications. Among these homologous compounds, the ordered structure crystals have attracted much attention for their low Ga2O3 content, high acoustic velocity and low acoustic loss. In this work, the ordered langasite structure crystals Ca3NbGa3Si2O14 (CNGS) were grown with vertical Bridgman method for the first time. The CNGS crystals with 25mm in diameter and 40mm in length were grown successfully from its stoichiometric melt through LGS crystal of Ø10mm×40mm being chosen as seed. X-ray powder diffraction experiments showed that the CNGS single crystals had a single phase and had the same structure as the LGS crystal. The transmittance spectra with the wavelength from 200 to 800nm were recorded by means of Spectrophotometer at room temperature.

217

Quasicontinuum Simulation of Effect of Crystal Orientation and Cutting Direction of on Nanometric Cutting of Single Crystal Copper

Authors: Hong Min Pen, Qing Shun Bai, Ying Chun Liang

Abstract: Quasicontinuum simulation of nanometric cutting was conducted on single crystal copper to investigate the effect of crystal orientation and cutting direction on nature of deformation of this material. The model reduces the degrees of freedom in simulations of nanometric cutting process without sacrificing important physics. The simulation results show the crystal orientation and cutting direction have a significant effect on the nature of deformation of nanometric cutting process. In addition, the variations of strain energy of workpiece atoms in different crystal set-ups are investigated.

154

Morphologies and Crystal Phase Control of Calcium Carbonate Using “Crew-Cut” Micelles of Poly (styrene)-b-Poly (acrylic acid) as a Crystal Growth Modifier at Room Temperature

Authors: Qing Kai Li, Yan Ping Wang, Yi Min Wang

Abstract: Cubic layer-structured calcite and spherical vaterite were successfully prepared in the present of PS-b-PAA at room temperature. The products were characterized with scanning electron microscopy (SEM), X-ray diffraction (XRD) and flourier transform infrared spectrum (FI-IR). The characterized results revealed that the PS-b-PAA concentration had a considerable influence on the morphologies and crystal phase transformation. With the PS-b-PAA concentration increasing, the crystal phase of CaCO₃particles would have a significant transition from calcite to vaterite, and the morphologies also showed remarkable changes from cubic layer-superstructure to spherical shape. Furthermore, cubic structured CaCO₃ particles with a larger size of ca. 100 μm in side length could be prepared by gas diffusion method, indicating that the “crew-cut” micelles are able to result in long-live crystal active sites so that novel large-scale inorganic materials might be prepared.

398

Spectrum Study of Crystal Fe: LiNbO₃ in Infrared-Visible-UV

Authors: Hai Lang Ju, Zong Liang Mao

Abstract: LiNbO3 is an important crystal which has piezoelectric, ferroelectric and electro-optical functions. It has a wide range of applications. Transmission and reflection spectrum of the LiNbO3 samples on the infrared-visible-ultraviolet light have been measured.The wavelength range is 200nm-2000nm. The transmission and reflection spectrum. The absorption coefficient was calculated by transmission and reflection spectrum. The absorption coefficient of the three samples increased slightly in the beginning of the scanning. Then there was a sudden change upward near 8.4*1014 Hz. Forbidden band Eg was obtained from absorption spectrum. The Eg of the three samples were obtained as 3.996ev,3.407ev and 3.425ev respectively. Forbidden band of LiNbO3 crystals was decreased as the iron doped.