Minimizing the effect of near-distance dielectric sensitivity on retrieving average aspect ratio of gold nanorod by optical extinction spectroscopy: in the case of CTAB adsorption

Directional recrystallization of an Fe–6.5wt%Si alloy was investigated by changing hot zone temperatures and growth rates. Elongated (columnar) grains with an aspect ratio more than 10 can be produced when growth parameters are carefully adjusted. It was found that at a fixed growth rate, the grain length and aspect ratio increase with increased hot zone temperatures. At a fixed hot zone temperature, there is a critical growth rate at which columnar grains have the largest average aspect ratio. Below or above this growth rate, the aspect ratio decreases. Texture and grain orientation analysis showed that the preferentially selective growth to form columnar grains was favored by the formation of low-energy surfaces and grain boundaries.

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Determination of the size distribution of metallic nanoparticles by optical extinction spectroscopy

Applied Optics ◽

10.1364/ao.48.000566 ◽

2009 ◽

Vol 48 (3) ◽

pp. 566 ◽

Cited By ~ 22

Author(s):

Ovidio Peña ◽

Luis Rodríguez-Fernández ◽

Vladimir Rodríguez-Iglesias ◽

Guinther Kellermann ◽

Alejandro Crespo-Sosa ◽

...

Keyword(s):

Size Distribution ◽

Metallic Nanoparticles ◽

Optical Extinction ◽

Optical Extinction Spectroscopy

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Study of the island morphology at the early stages of Fe/Mo(110) MBE growth

Open Physics ◽

10.2478/s11534-008-0124-z ◽

2009 ◽

Vol 7 (2) ◽

Cited By ~ 1

Author(s):

Dmytro Goykolov ◽

Miroslav Kotrla

Keyword(s):

Low Temperature ◽

Aspect Ratio ◽

Theoretical Study ◽

Morphological Changes ◽

Nearest Neighbors ◽

Sos Model ◽

Mbe Growth ◽

Calculated Dependence ◽

Average Aspect Ratio ◽

Higher Temperature

AbstractWe present theoretical study of morphology of Fe islands grown at Mo(110) surface in submonolayer MBE mode. We utilize atomistic SOS model with bond counting, and interactions of Fe adatom up to third nearest neighbors. We performed KMC simulations for different values of adatom interactions and varying temperatures. We have found that, while for the low temperature islands are fat fractals, for the temperature 500 K islands have faceted rhombic-like shape. For the higher temperature, islands acquire a rounded shape. In order to evaluate qualitatively morphological changes, we measured average aspect ratio of islands. We calculated dependence of the average aspect ratio on the temperature, and on the strength of interactions of an adatom with neighbors.

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Optical extinction spectroscopy of single silver nanoparticles

The European Physical Journal D ◽

10.1140/epjd/e2007-00112-y ◽

2007 ◽

Vol 43 (1-3) ◽

pp. 271-274 ◽

Cited By ~ 51

Author(s):

P. Billaud ◽

J.-R. Huntzinger ◽

E. Cottancin ◽

J. Lermé ◽

M. Pellarin ◽

...

Keyword(s):

Silver Nanoparticles ◽

Optical Extinction ◽

Optical Extinction Spectroscopy

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Sizing gold nanoparticles by optical extinction spectroscopy

Nanotechnology ◽

10.1088/0957-4484/16/1/030 ◽

2004 ◽

Vol 16 (1) ◽

pp. 158-163 ◽

Cited By ~ 105

Author(s):

L B Scaffardi ◽

N Pellegri ◽

O de Sanctis ◽

J O Tocho

Keyword(s):

Gold Nanoparticles ◽

Optical Extinction ◽

Optical Extinction Spectroscopy

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THE EXPECTED EXTREMES IN A DELAUNAY TRIANGULATION

International Journal of Computational Geometry & Applications ◽

10.1142/s0218195991000074 ◽

1991 ◽

Vol 01 (01) ◽

pp. 79-91 ◽

Cited By ~ 28

Author(s):

MARSHALL BERN ◽

DAVID EPPSTEIN ◽

FRANCES YAO

Keyword(s):

Aspect Ratio ◽

Poisson Process ◽

Delaunay Triangulation ◽

Edge Effects ◽

Mesh Generation ◽

Case Analysis ◽

Edge Length ◽

Delaunay Triangulations ◽

Fixed Dimension ◽

Average Aspect Ratio

We give an expected-case analysis of Delaunay triangulations. To avoid edge effects we consider a unit-intensity Poisson process in Euclidean d-space, and then limit attention to the portion of the triangulation within a cube of side n1/d. For d equal to two, we calculate the expected maximum edge length, the expected minimum and maximum angles, and the average aspect ratio of a triangle. We also show that in any fixed dimension the expected maximum vertex degree is Θ( log n/ log log n). Altogether our results provide some measure of the suitability of the Delaunay triangulation for certain applications, such as interpolation and mesh generation.

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The influence of shape and sliding distance of femoral head movement loci on the wear of acetabular cups in total hip arthroplasty

Proceedings of the Institution of Mechanical Engineers Part H Journal of Engineering in Medicine ◽

10.1243/095441102321032184 ◽

2002 ◽

Vol 216 (6) ◽

pp. 393-402 ◽

Cited By ~ 14

Author(s):

D Bennett ◽

J F Orr ◽

D E Beverland ◽

R Baker

Keyword(s):

Femoral Head ◽

Aspect Ratio ◽

Hip Joint ◽

Wear Rates ◽

Total Hip ◽

Aspect Ratios ◽

Average Aspect Ratio ◽

Sliding Distance

Wear of the polyethylene acetabular component is the most serious threat to the long-term success of total hip replacements (THRs). Greatly reduced wear rates have been reported for unidirectional, compared to multidirectional, articulation in vitro. This study considers the multidirectional motions experienced at the hip joint as described by movement loci of points on the femoral head for individual THR patients. A three-dimensional computer program determined the movement loci of selected points on the femoral head for THR patients and normal subjects using kinematic data obtained from gait analysis. The sizes and shapes of these loci were quantified by their sliding distances and aspect ratios with substantial differences exhibited between individual THR patients. The average sliding distances ranged from 10.0 to 18.1 mm and the average aspect ratios of the loci ranged from 2.5 to 9.2 for the THR patients. Positive correlations were found between wear rate and average sliding distance, the inverse of the average aspect ratio of the loci and the product of the average sliding distance and the inverse of the average aspect ratio of the loci. Patients with a normal hip joint range of motion produce multidirectional motion loci and tend to experience more wear than patients with more unidirectional motion loci. Differing patterns of multidirectional motion at the hip joint for individual THR patients may explain widely differing wear rates in vivo.

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