scholarly journals Vibrations of single-crystal gold nanorods and nanowires

2018 ◽  
Vol 97 (15) ◽  
Author(s):  
L. Saviot
Keyword(s):  
Single Crystal ◽  
Gold Nanorods

The evolution of size, shape, and surface morphology of gold nanorods

2018 ◽  
Vol 54 (24) ◽  
pp. 3022-3025 ◽  
Author(s):  
Wenming Tong ◽  
Hadas Katz-Boon ◽  
Michael J. Walsh ◽  
Matthew Weyland ◽  
Joanne Etheridge ◽  
...  
Keyword(s):  
Aspect Ratio ◽  
Surface Morphology ◽  
Single Crystal ◽  
Gold Nanorods ◽  
Aspect Ratios

The transformation of single crystal gold nanorods over extended growth times shows smoothing of surface morphology and reduction and convergence of aspect ratios across AgNO3 concentrations. The final aspect ratio has little dependence on the AgNO3 concentration.

A Mechanism for Symmetry Breaking and Shape Control in Single-Crystal Gold Nanorods

2017 ◽  
Vol 50 (12) ◽  
pp. 2925-2935 ◽  
Author(s):  
Michael J. Walsh ◽  
Wenming Tong ◽  
Hadas Katz-Boon ◽  
Paul Mulvaney ◽  
Joanne Etheridge ◽  
...  
Keyword(s):  
Symmetry Breaking ◽  
Single Crystal ◽  
Gold Nanorods ◽  
Shape Control

scholarly journals Breathing mode vibrations and elastic properties of single-crystal and penta-twinned gold nanorods

2016 ◽  
Vol 18 (32) ◽  
pp. 22590-22598 ◽  
Author(s):  
Yong Gan ◽  
Zheng Sun ◽  
Zhen Chen
Keyword(s):  
Single Crystal ◽  
Elastic Properties ◽  
Elastic Constants ◽  
Gold Nanorods ◽  
Breathing Mode

Continuum simulations using bulk elastic constants could well predict the breathing periods of crystalline gold nanorods.

Single-crystal caged gold nanorods with tunable broadband plasmon resonances

2013 ◽  
Vol 49 (83) ◽  
pp. 9630 ◽  
Author(s):  
Wei Xiong ◽  
Debabrata Sikdar ◽  
Michael Walsh ◽  
Kae Jye Si ◽  
Yue Tang ◽  
...  
Keyword(s):  
Single Crystal ◽  
Gold Nanorods ◽  
Plasmon Resonances

scholarly journals Overgrowth and Crystalline Structure of Gold Nanorods

2012 ◽  
Vol 18 (S5) ◽  
pp. 67-68 ◽  
Author(s):  
J. B. Rodríguez-González ◽  
E. Carbó-Argibay ◽  
I. Pastoriza-Santos ◽  
J. Pérez-Juste ◽  
L.M. Liz-Marzán
Keyword(s):  
Gold Nanoparticles ◽  
Single Crystal ◽  
Crystalline Structure ◽  
Gold Nanorods ◽  
Morphology Control ◽  
Building Blocks ◽  
Effective Control ◽  
Tight Control ◽  
Nanostructured Systems ◽  
Shape And Size

The effective control over the behavior of nanostructured systems requires a tight control over the shape and size of the nanoparticle building blocks. This control can be very effective and useful in the case of crystalline gold nanoparticles. In order to achieve a precise morphology control over the particles obtained using gold nanorods as seeds; we have studied the crystalline structure of the initial single-crystal gold nanorods, which can be used in subsequent overgrowth processes. We also studied the mechanisms involved in the overgrowth and reshaping of such gold nanorods.

A Preparation of High Resolution Standards for Electron Microscopy. Part II

1971 ◽  
Vol 29 ◽  
pp. 160-161
Author(s):  
Akira Tanaka ◽  
David F. Harling
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
Carbon Black ◽  
Single Crystal ◽  
Dark Field ◽  
Graphitized Carbon Black ◽  
Graphitized Carbon ◽  
Dark Field Imaging ◽  
Crystal Films ◽  
Micro Holes

In the previous paper, the author reported on a technique for preparing vapor-deposited single crystal films as high resolution standards for electron microscopy. The present paper is intended to describe the preparation of several high resolution standards for dark field microscopy and also to mention some results obtained from these studies. Three preparations were used initially: 1.) Graphitized carbon black, 2.) Epitaxially grown particles of different metals prepared by vapor deposition, and 3.) Particles grown epitaxially on the edge of micro-holes formed in a gold single crystal film.The authors successfully obtained dark field micrographs demonstrating the 3.4Å lattice spacing of graphitized carbon black and the Au single crystal (111) lattice of 2.35Å. The latter spacing is especially suitable for dark field imaging because of its preparation, as in 3.), above. After the deposited film of Au (001) orientation is prepared at 400°C the substrate temperature is raised, resulting in the formation of many square micro-holes caused by partial evaporation of the Au film.

Structure of Palladium Single-Crystal Films Prepared by Flash Evaporation onto (001) NaCl Substrates

1970 ◽  
Vol 28 ◽  
pp. 456-457
Author(s):  
L. E. Murr ◽  
G. Wong
Keyword(s):  
Single Crystal ◽  
High Vacuum ◽  
Ultra High Vacuum ◽  
High Rate ◽  
Flash Evaporation ◽  
Optimum Load ◽  
Single Crystal Films ◽  
Crystal Films ◽  
A Current

Palladium single-crystal films have been prepared by Matthews in ultra-high vacuum by evaporation onto (001) NaCl substrates cleaved in-situ, and maintained at ∼ 350° C. Murr has also produced large-grained and single-crystal Pd films by high-rate evaporation onto (001) NaCl air-cleaved substrates at 350°C. In the present work, very large (∼ 3cm2), continuous single-crystal films of Pd have been prepared by flash evaporation onto air-cleaved (001) NaCl substrates at temperatures at or below 250°C. Evaporation rates estimated to be ≧ 2000 Å/sec, were obtained by effectively short-circuiting 1 mil tungsten evaporation boats in a self-regulating system which maintained an optimum load current of approximately 90 amperes; corresponding to a current density through the boat of ∼ 4 × 104 amperes/cm2.

Dislocations, Ordering and Antiferromagnetic Domains in MnO

1970 ◽  
Vol 28 ◽  
pp. 522-523
Author(s):  
D. J. Barber ◽  
R. G. Evans
Keyword(s):  
Electron Diffraction ◽  
Single Crystal ◽  
Optical Microscopy ◽  
Defect Chemistry ◽  
Magnetic Structures ◽  
Optically Transparent ◽  
Magnetic Features ◽  
Antiferromagnetic Domains

Manganese (II) oxide, MnO, in common with CoO, NiO and FeO, possesses the NaCl structure and shows antiferromagnetism below its Neel point, Tn∼ 122 K. However, the defect chemistry of the four oxides is different and the magnetic structures are not identical. The non-stoichiometry in MnO2 small (∼2%) and below the Tn the spins lie in (111) planes. Previous work reported observations of magnetic features in CoO and NiO. The aim of our work was to find explanations for certain resonance results on antiferromagnetic MnO.Foils of single crystal MnO were prepared from shaped discs by dissolution in a mixture of HCl and HNO3. Optical microscopy revealed that the etch-pitted foils contained cruciform-shaped precipitates, often thick and proud of the surface but red-colored when optically transparent (MnO is green). Electron diffraction and probe microanalysis indicated that the precipitates were Mn2O3, in contrast with recent findings of Co3O4 in CoO.

Electron Microscopy of Shock Loaded Polycrystalline Beryllium

1974 ◽  
Vol 32 ◽  
pp. 506-507 ◽  
Author(s):  
J. M. Galbraith ◽  
L. E. Murr ◽  
A. L. Stevens
Keyword(s):  
Electron Microscopy ◽  
Wave Propagation ◽  
Structural Change ◽  
Single Crystal ◽  
Diffraction Pattern ◽  
Shock Loading ◽  
Slip Systems ◽  
Compression Tests ◽  
X Ray Diffraction ◽  
X Ray

Uniaxial compression tests and hydrostatic tests at pressures up to 27 kbars have been performed to determine operating slip systems in single crystal and polycrystal1ine beryllium. A recent study has been made of wave propagation in single crystal beryllium by shock loading to selectively activate various slip systems, and this has been followed by a study of wave propagation and spallation in textured, polycrystal1ine beryllium. An alteration in the X-ray diffraction pattern has been noted after shock loading, but this alteration has not yet been correlated with any structural change occurring during shock loading of polycrystal1ine beryllium.This study is being conducted in an effort to characterize the effects of shock loading on textured, polycrystal1ine beryllium. Samples were fabricated from a billet of Kawecki-Berylco hot pressed HP-10 beryllium.

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