Shape and size transformation of gold nanorods (GNRs) via oxidation process: A reverse growth mechanism

2011 ◽  
Vol 257 (9) ◽  
pp. 4175-4179 ◽  
Author(s):  
Govindasamy Chandrasekar ◽  
Karine Mougin ◽  
Hamidou Haidara ◽  
Loïc Vidal ◽  
Enrico Gnecco
Keyword(s):  
Growth Mechanism ◽  
Gold Nanorods ◽  
Oxidation Process ◽  
Shape And Size

Growth Mechanism of Gold Nanorods

2013 ◽  
Vol 25 (4) ◽  
pp. 555-563 ◽  
Author(s):  
Kyoungweon Park ◽  
Lawrence F. Drummy ◽  
Robert C. Wadams ◽  
Hilmar Koerner ◽  
Dhriti Nepal ◽  
...  
Keyword(s):  
Growth Mechanism ◽  
Gold Nanorods

Growth Mechanism of Gold Nanorods in Binary Surfactant System

2016 ◽  
Vol 37 (6) ◽  
pp. 931-937 ◽  
Author(s):  
Bo-Mi Kim ◽  
Sun-Hwa Seo ◽  
Ara Joe ◽  
Kyu-Dong Shim ◽  
Eue-Soon Jang
Keyword(s):  
Growth Mechanism ◽  
Gold Nanorods ◽  
Surfactant System

Preparation and Growth Mechanism of Gold Nanorods (NRs) Using Seed-Mediated Growth Method

2003 ◽  
Vol 15 (10) ◽  
pp. 1957-1962 ◽  
Author(s):  
Babak Nikoobakht ◽  
Mostafa A. El-Sayed
Keyword(s):  
Growth Mechanism ◽  
Gold Nanorods ◽  
Growth Method ◽  
Seed Mediated

Controlling Length of Gold Nanorods and Monitoring Their Growth Mechanism Using X-ray Absorption Spectroscopy

2006 ◽  
Vol 921 ◽  
Author(s):  
Ru-Shi Liu ◽  
H. M. Chen ◽  
S. F. Hu
Keyword(s):  
Ascorbic Acid ◽  
Fine Structure ◽  
Absorption Spectroscopy ◽  
Growth Mechanism ◽  
Gold Nanorods ◽  
New Approach ◽  
Growth Solution ◽  
X Ray ◽  
Aspect Ratios ◽  
X Ray Absorption

AbstractA new approach to fabricate long length of gold nanorods by controlling the volume of growth solution will be reported. The shape evolutions ranging from fusiform nanoparticles to 1-D rods was observed. Increasing the addition of growth solution can control the length of nanorods. The length of rods can be extended to 2 £gm, and nanorods with aspect ratios of up to ~ 70 could be obtained. Moreover, X-ray absorption spectroscopy (XAS) is applied herein to elucidate the growth mechanism of gold nanorods. The gold ions were directly reduced to gold atoms by ascorbic acid during the reaction, and then gold atoms were deposited on the surface of gold seeds that were introduced into the reaction. Extended X-ray absorption fine structure (EXAFS) confirmed the growth of gold and the environment around Au atoms over the reaction. The XAS are expected to have wide applications in the growth of gold and other related materials.

INVESTIGATION ON OXIDE GROWTH MECHANISM OF PECVD SILICON CARBIDE FILMS

2002 ◽  
Vol 16 (06n07) ◽  
pp. 1062-1066
Author(s):  
W. K. CHOI ◽  
C. C. LEOY ◽  
L. P. LEE
Keyword(s):  
Activation Energy ◽  
Silicon Carbide ◽  
Infrared Spectroscopy ◽  
Amorphous Silicon ◽  
Growth Mechanism ◽  
Oxidation Process ◽  
Oxidation Temperature ◽  
Oxide Growth ◽  
Linear Regime ◽  
Spectroscopy Technique

The effect of the Si-C , Si-CH3 , C-Hn , Si-H and Si dangling bonds on the oxidation process was investigated by monitoring the changes of these bands as a function of oxidation temperature or duration using the infrared spectroscopy technique. We concluded that the activation energy obtained from the linear regime of the oxide growth is related to the C-Hn bonds. We suggested that most of the C-Hn bonds were bonded to Si with n = 3 , that gave rise to voids to facilitate the oxidation of amorphous silicon carbide films.

Controllable synthesis of palladium nanoparticles via a simple sonoelectrochemical method

2003 ◽  
Vol 18 (6) ◽  
pp. 1399-1404 ◽  
Author(s):  
Xiao-Feng Qiu ◽  
Jin-Zhong Xu ◽  
Jian-Ming Zhu ◽  
Jun-Jie Zhu ◽  
Shu Xu ◽  
...  
Keyword(s):  
Growth Mechanism ◽  
Current Density ◽  
Palladium Nanoparticles ◽  
Room Temperature ◽  
Controllable Synthesis ◽  
Highly Dispersed ◽  
Ultrasonic Intensity ◽  
Palladium Particles ◽  
Shape And Size

A simple pulse sonoelectrochemical technique was used to synthesize highly dispersed spherical palladium particles and a dendritic Pd superstructure in the presence of cethyltrimethylammonium bromide (CTAB) at room temperature. The shape and size of spherical nanocrystalline Pd can be controlled by varying current density, the interval between two continuous ultrasonic pulses, ultrasonic intensity, and the concentration of CTAB. The possible growth mechanism of dendritic-structured Pd is discussed.

Growth mechanism of ZnO nanostructures in wet-oxidation process

2011 ◽  
Vol 519 (6) ◽  
pp. 1837-1844 ◽  
Author(s):  
Ruiqun Chen ◽  
Chongwen Zou ◽  
Xiaodong Yan ◽  
Ahmed Alyamani ◽  
Wei Gao
Keyword(s):  
Growth Mechanism ◽  
Oxidation Process ◽  
Wet Oxidation ◽  
Zno Nanostructures

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.

Control of Metal Alloy Oxidation with Electric Fields

1973 ◽  
Vol 31 ◽  
pp. 164-165
Author(s):  
R. R. Dils ◽  
P. S. Follansbee
Keyword(s):  
Electric Fields ◽  
Oxidation Process ◽  
Base Alloy ◽  
Oxide Surface ◽  
Platinum Electrodes ◽  
Insulating Layer ◽  
Iron Base Alloy ◽  
Alloy Oxidation ◽  
Aluminum Oxide Layer ◽  
And Control

Electric fields have been applied across oxides growing on a high temperature alloy and control of the oxidation of the material has been demonstrated. At present, three-fold increases in the oxidation rate have been measured in accelerating fields and the oxidation process has been completely stopped in a retarding field.The experiments have been conducted with an iron-base alloy, Pe 25Cr 5A1 0.1Y, although, in principle, any alloy capable of forming an adherent aluminum oxide layer during oxidation can be used. A specimen is polished and oxidized to produce a thin, uniform insulating layer on one surface. Three platinum electrodes are sputtered on the oxide surface and the specimen is reoxidized.

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