Synthesis of Homogeneous Gold Nanorods through the Optimized Multi-step Seed-Mediated Growth Method

2021 ◽  
Author(s):  
Xing Zhang ◽  
Ninh Tran ◽  
Thomas Egan ◽  
Bhanu Sharma ◽  
Gang Chen
Keyword(s):  
Gold Nanorods ◽  
Growth Method ◽  
Seed Mediated

Effect of aspect ratio on the chirality of gold nanorods prepared through conventional seed-mediated growth method

2021 ◽  
Vol 1152 ◽  
pp. 338277
Author(s):  
Xiaojuan Zhou ◽  
Qiang Liu ◽  
Xiaoyu Shi ◽  
Chunli Xu ◽  
Baoxin Li
Keyword(s):  
Aspect Ratio ◽  
Gold Nanorods ◽  
Growth Method ◽  
Seed Mediated

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

scholarly journals Investigation of thermal conductivity property of plasmonic nanofluids based on gold nanorods prepared by seed-mediated growth method

2019 ◽  
Vol 2 (22) ◽  
pp. 119-133
Author(s):  
Mahsa Mohammadzadeh ◽  
Mohsen Ashjari ◽  
Davoud Zare
Keyword(s):  
Thermal Conductivity ◽  
Aspect Ratio ◽  
Gold Nanorods ◽  
Thermal Conductivity Coefficient ◽  
Volume Fraction ◽  
Effect Of Temperature ◽  
Basic Fluid ◽  
Vis Spectroscopy ◽  
Growth Method ◽  
Seed Mediated

In this paper, nanofluids were prepared based on gold nanorods in basic fluid, water, by single-stage chemical reduction and in different volume fractions and the used gold nanorods were synthesized by seed-mediated growth method in different dimensional ratios. The properties of the prepared nanoparticles, including crystalline size, aspect ratio, surface properties, nanoparticle purity, shape and morphology of nanostructures were investigated using x-ray diffraction, UV-vis spectroscopy, FT-IR, and transmitted electron microscopy. The effect of changing parameters of Nano rod dimensions, changes in Nano rod volume fraction in water and also the effect of temperature on the nanofluid thermal conductivity coefficient were investigated using transient hot wire method. The results showed that reducing the aspect ratio, increasing the volume fraction and increasing the temperature increase the thermal conductivity. In fact, results show that an increase in the nanorods aspect ratio with a constant volume fraction of 1:50 of gold in water nanorod and at room temperature leads to a decrease in the thermal conductivity of the nanofluid. Also, increasing the two parameters of volume fraction and temperature significantly increases the thermal conductivity coefficient.

scholarly journals Effective replacement of cetyltrimethylammonium bromide (CTAB) by mercaptoalkanoic acids on gold nanorod (AuNR) surfaces in aqueous solutions

Nanoscale ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 658-668 ◽  
Author(s):  
Rafael del Caño ◽  
Jose M. Gisbert-González ◽  
Jose González-Rodríguez ◽  
Guadalupe Sánchez-Obrero ◽  
Rafael Madueño ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Gold Nanorods ◽  
Ligand Exchange ◽  
Cetyltrimethylammonium Bromide ◽  
Gold Nanorod ◽  
Experimental Conditions ◽  
Seed Mediated ◽  
The Stability

The highly packed cetyltrimethylammonium bromide bilayer on the surface of gold nanorods synthesized by the seed-mediated procedure hampers the complete ligand exchange under experimental conditions that preserves the stability of the dispersions.

scholarly journals Kinetic impact of Pt seed morphology on the highly controlled growth of Ni-based nanostructures

RSC Advances ◽  
2015 ◽  
Vol 5 (64) ◽  
pp. 52033-52040 ◽  
Author(s):  
Carmen Vázquez-Vázquez ◽  
Marcos Sanlés-Sobrido ◽  
Benito Rodríguez-González ◽  
Miguel Spuch-Calvar ◽  
Manuel Bañobre-López ◽  
...  
Keyword(s):  
Seed Morphology ◽  
Controlled Growth ◽  
Growth Method ◽  
Seed Mediated

A Pt seed-mediated growth method for the synthesis of Ni/NiO and Ni/Ni(OH)2 nanocomposites offers an unprecedented control over the morphological and compositional features of Ni-based nanostructures.

scholarly journals Direct formation of gold nanorods on surfaces using polymer-immobilised gold seeds

2016 ◽  
Vol 7 ◽  
pp. 809-816 ◽  
Author(s):  
Majid K Abyaneh ◽  
Pietro Parisse ◽  
Loredana Casalis
Keyword(s):  
Gold Nanorods ◽  
Growth Control ◽  
Weight Ratio ◽  
Polymer Nanocomposite ◽  
Gold Salt ◽  
Aspect Ratios ◽  
Direct Formation ◽  
Growth Method ◽  
Direct Growth ◽  
Gold Seed

Herein, we present the formation of gold nanorods (GNRs) on novel gold–poly(methyl methacrylate) (Au–PMMA) nanocomposite substrates with unprecedented growth control through the polymer molecular weight (M w) and gold-salt-to-polymer weight ratio. For the first time, GNRs have been produced by seed-mediated direct growth on surfaces that were pre-coated with polymer-immobilised gold seeds. A Au–PMMA nanocomposite formed by UV photoreduction has been used as the gold seed. The influence of polymer M w and gold concentration on the formation of GNRs has been investigated and discussed. The polymer nanocomposite formed with a lower M w PMMA and 20 wt % gold salt provides a suitable medium for growing well-dispersed GNRs. In this sample, the average dimension of produced GNRs is 200 nm in length with aspect ratios up to 10 and a distribution of GNRs to nanoparticles of nearly 22%. Suitable characterization techniques such as AFM and SEM have been used to support concept of the proposed growth method.

Synthesis of concave gold nanocuboids with high-index facets and their enhanced catalytic activity

2015 ◽  
Vol 51 (58) ◽  
pp. 11591-11594 ◽  
Author(s):  
Lidong Li ◽  
Yi Peng ◽  
Yonghai Yue ◽  
Ye Hu ◽  
Xiu Liang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
High Index ◽  
Catalytic Activities ◽  
Growth Method ◽  
Seed Mediated

Novel concave gold nanocuboids bounded by 24 high-index {611} facets are synthesized using the seed-mediated growth method via an overgrowth mechanism, which exhibit excellent catalytic activities over certain reactions.

scholarly journals Preparation and Progress in Application of Gold Nanorods

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Liqing Meng ◽  
Jinsheng Zhang ◽  
Huiqin Li ◽  
Weiwei Zhao ◽  
Tonggang Zhao
Keyword(s):  
Optical Properties ◽  
Gold Nanorods ◽  
Secondary Growth ◽  
Disease Diagnosis ◽  
Information Storage ◽  
Hard Template ◽  
Comprehensive Review ◽  
Growth Method ◽  
Seed Method ◽  
Hard Template Method

Gold nanorods (Au NRs) have attracted extensive research interest due to their unique optical properties, adjustable aspect ratio, and easy surface modification in the fields of biosensing, bioimaging, and disease diagnosis and detection. In this review, we present a comprehensive review of various methods for preparing gold nanorods including hard template method, electrochemistry method, photochemistry method, seed-mediated growth method, secondary growth method, and amorphous seed method. The unique optical properties of the gold nanorods and its applications in biomedical, detection, catalysis, and information storage will also be discussed in detail.

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