Formation of Gold Nanorods by Seeded Growth: Mechanisms and Modeling

2018 ◽  
Vol 18 (6) ◽  
pp. 3269-3282 ◽  
Author(s):  
Advait Chhatre ◽  
Rochish Thaokar ◽  
Anurag Mehra
Keyword(s):  
Gold Nanorods ◽  
Growth Mechanisms ◽  
Seeded Growth

Cooperative interactions among CTA+, Br– and Ag+ during seeded growth of gold nanorods

Nano Research ◽  
2017 ◽  
Vol 10 (6) ◽  
pp. 2146-2155 ◽  
Author(s):  
Yong Xu ◽  
Lei Chen ◽  
Xingchen Ye ◽  
Xuchun Wang ◽  
Jiaqi Yu ◽  
...  
Keyword(s):  
Gold Nanorods ◽  
Seeded Growth ◽  
Cooperative Interactions

Using Binary Surfactant Mixtures To Simultaneously Improve the Dimensional Tunability and Monodispersity in the Seeded Growth of Gold Nanorods

Nano Letters ◽  
2013 ◽  
Vol 13 (2) ◽  
pp. 765-771 ◽  
Author(s):  
Xingchen Ye ◽  
Chen Zheng ◽  
Jun Chen ◽  
Yuzhi Gao ◽  
Christopher B. Murray
Keyword(s):  
Gold Nanorods ◽  
Seeded Growth ◽  
Surfactant Mixtures

scholarly journals SEEDED GROWTH SYNTHESIS OF GOLD NANORODS FOR PHOTOTHERMAL APPLICATION

2018 ◽  
Vol 56 (2) ◽  
pp. 148
Author(s):  
Hue Thi Do ◽  
Vu Thi Thuy Duong ◽  
Nguyen Trong Nghia ◽  
Nhung Hong Tran ◽  
Lien Thi Ha Nghiem
Keyword(s):  
Ascorbic Acid ◽  
Aspect Ratio ◽  
Gold Nanorods ◽  
Growth Yield ◽  
Seeded Growth ◽  
Surfactant Templating ◽  
Seed Mediated

In this paper, the gold nanorods (GNRs) were synthesized via a seed-mediated method using 1-3 nm seeds-in diameter and gold atoms created from the reduced Au3+ ions by ascorbic acid (AA) in the presence of cetyltrimethylammonnium bromide (CTAB) as a surfactant templating. The aspect ratio of GNRs as well as growth yield was controlled by adjusting the concentration of Ag+ ions.

Seeded growth of gold nanorods: the effect of sulfur-containing quenching agents

2018 ◽  
Vol 20 (3) ◽  
Author(s):  
Alberto Gobbo ◽  
Riccardo Marin ◽  
Patrizia Canton
Keyword(s):  
Gold Nanorods ◽  
Seeded Growth ◽  
Sulfur Containing

scholarly journals Disconnecting Symmetry Breaking from Seeded Growth for the Reproducible Synthesis of High Quality Gold Nanorods

ACS Nano ◽  
2019 ◽  
Vol 13 (4) ◽  
pp. 4424-4435 ◽  
Author(s):  
Guillermo González-Rubio ◽  
Vished Kumar ◽  
Pablo Llombart ◽  
Pablo Díaz-Núñez ◽  
Eva Bladt ◽  
...  
Keyword(s):  
Symmetry Breaking ◽  
Gold Nanorods ◽  
Seeded Growth ◽  
High Quality

Seeded Growth of Monodisperse Gold Nanorods Using Bromide-Free Surfactant Mixtures

Nano Letters ◽  
2013 ◽  
Vol 13 (5) ◽  
pp. 2163-2171 ◽  
Author(s):  
Xingchen Ye ◽  
Yuzhi Gao ◽  
Jun Chen ◽  
Danielle C. Reifsnyder ◽  
Chen Zheng ◽  
...  
Keyword(s):  
Gold Nanorods ◽  
Seeded Growth ◽  
Surfactant Mixtures

scholarly journals Micelle-directed chiral seeded growth on anisotropic gold nanocrystals

Science ◽  
2020 ◽  
Vol 368 (6498) ◽  
pp. 1472-1477 ◽  
Author(s):  
Guillermo González-Rubio ◽  
Jesús Mosquera ◽  
Vished Kumar ◽  
Adrián Pedrazo-Tardajos ◽  
Pablo Llombart ◽  
...  
Keyword(s):  
Gold Nanorods ◽  
Near Infrared ◽  
Mixed Micelles ◽  
Electromagnetic Spectrum ◽  
Seeded Growth ◽  
Gold Nanocrystals ◽  
Direct Seeded ◽  
Templating Effect ◽  
Surfactant Assisted ◽  
Plasmon Modes

Surfactant-assisted seeded growth of metal nanoparticles (NPs) can be engineered to produce anisotropic gold nanocrystals with high chiroptical activity through the templating effect of chiral micelles formed in the presence of dissymmetric cosurfactants. Mixed micelles adsorb on gold nanorods, forming quasihelical patterns that direct seeded growth into NPs with pronounced morphological and optical handedness. Sharp chiral wrinkles lead to chiral plasmon modes with high dissymmetry factors (~0.20). Through variation of the dimensions of chiral wrinkles, the chiroptical properties can be tuned within the visible and near-infrared electromagnetic spectrum. The micelle-directed mechanism allows extension to other systems, such as the seeded growth of chiral platinum shells on gold nanorods. This approach provides a reproducible, simple, and scalable method toward the fabrication of NPs with high chiral optical activity.

The growth of mica polytypes as studied by conventional and high-resolution TEM

1983 ◽  
Vol 41 ◽  
pp. 174-177
Author(s):  
A. Baronnet ◽  
M. Amouric
Keyword(s):  
Water Pressure ◽  
Point Of View ◽  
Temperature Fields ◽  
Natural Occurrence ◽  
Growth Mechanisms ◽  
Long Period ◽  
High Resolution Tem ◽  
Layer Stacking ◽  
Experimental Works ◽  
Potential Use

The origin of mica polytypes has long been a challenging problem for crystal- lographers, mineralogists and petrologists. From the petrological point of view, interest in this field arose from the potential use of layer stacking data to furnish further informations about equilibrium and/or kinetic conditions prevailing during the crystallization of the widespread mica-bearing rocks. From the compilation of previous experimental works dealing with the occurrence domains of the various mica "polymorphs" (1Mr, 1M, 2M1, 2M2 and 3T) within water-pressure vs temperature fields, it became clear that most of these modifications should be considered as metastable for a fixed mica species. Furthermore, the natural occurrence of long-period (or complex) polytypes could not be accounted for by phase considerations. This highlighted the need of a more detailed kinetic approach of the problem and, in particular, of the role growth mechanisms of basal faces could play in this crystallographic phenomenon.

Crystal structure images of large gold clusters and growing crystals by HRTEM

1984 ◽  
Vol 42 ◽  
pp. 428-429
Author(s):  
L.R. Wallenberg ◽  
J.-O. Bovin ◽  
G. Schmid
Keyword(s):  
Crystal Structure ◽  
Nucleation And Growth ◽  
Close Packing ◽  
Gold Clusters ◽  
Molecular Weight Determination ◽  
Growth Mechanisms ◽  
Starting Point ◽  
Different Types ◽  
Nucleation And Growth Mechanisms ◽  
Points Of View

Metallic clusters are interesting from various points of view, e.g. as a mean of spreading expensive catalysts on a support, or following heterogeneous and homogeneous catalytic events. It is also possible to study nucleation and growth mechanisms for crystals with the cluster as known starting point.Gold-clusters containing 55 atoms were manufactured by reducing (C6H5)3PAuCl with B2H6 in benzene. The chemical composition was found to be Au9.2[P(C6H5)3]2Cl. Molecular-weight determination by means of an ultracentrifuge gave the formula Au55[P(C6H5)3]Cl6 A model was proposed from Mössbauer spectra by Schmid et al. with cubic close-packing of the 55 gold atoms in a cubeoctahedron as shown in Fig 1. The cluster is almost completely isolated from the surroundings by the twelve triphenylphosphane groups situated in each corner, and the chlorine atoms on the centre of the 3x3 square surfaces. This gives four groups of gold atoms, depending on the different types of surrounding.

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