Seed-Mediated Synthesis of Monodisperse Concave Trisoctahedral Gold Nanocrystals with Controllable Sizes

2010 ◽  
Vol 114 (25) ◽  
pp. 11119-11126 ◽  
Author(s):  
Yue Yu ◽  
Qingbo Zhang ◽  
Xianmao Lu ◽  
Jim Yang Lee
Keyword(s):  
Gold Nanocrystals ◽  
Seed Mediated

scholarly journals Covalently capped seed-mediated growth: a unique approach toward hierarchical growth of gold nanocrystals

Nanoscale ◽  
2014 ◽  
Vol 6 (12) ◽  
pp. 6478-6481 ◽  
Author(s):  
Youju Huang ◽  
Anirban Dandapat ◽  
Dong-Hwan Kim
Keyword(s):  
Gold Nanostructures ◽  
Gold Nanocrystals ◽  
Unique Approach ◽  
Different Shapes ◽  
Seed Mediated ◽  
Growth Approach

A new 600 dpi in TIF format)??>method is proposed for synthesizing hierarchical gold nanostructures in different shapes using the covalently capped seed-mediated growth approach.

scholarly journals Seed-Mediated Growth of Gold Nanocrystals: Changes to the Crystallinity or Morphology as Induced by the Treatment of Seeds with a Sulfur Species

2014 ◽  
Vol 118 (49) ◽  
pp. 14132-14139 ◽  
Author(s):  
Yiqun Zheng ◽  
Ming Luo ◽  
Jing Tao ◽  
Hsin-Chieh Peng ◽  
Dehui Wan ◽  
...  
Keyword(s):  
Sulfur Species ◽  
Gold Nanocrystals ◽  
Seed Mediated

Seed-mediated synthesis and PEG coating of gold nanoparticles for controlling morphology and sizes

MRS Advances ◽  
2020 ◽  
Vol 5 (63) ◽  
pp. 3353-3360
Author(s):  
Susana Helena Arellano Ramírez ◽  
Perla García Casillas ◽  
Christian Chapa González
Keyword(s):  
Gold Nanoparticles ◽  
Polyethylene Glycol ◽  
Room Temperature ◽  
Colloidal Stability ◽  
Infrared Spectrometry ◽  
Ammonium Bromide ◽  
Chloroauric Acid ◽  
Vis Spectroscopy ◽  
Seed Mediated ◽  
Peg Coating

AbstractA significant area of research is biomedical applications of nanoparticles which involves efforts to control the physicochemical properties through simple and scalable processes. Gold nanoparticles have received considerable attention due to their unique properties that they exhibit based on their morphology. Gold nanospheres (AuNSs) and nanorods (AuNRs) were prepared with a seed-mediated method followed of polyethylene glycol (PEG)-coating. The seeds were prepared with 0.1 M cetyltrimethyl-ammonium bromide (CTAB), 0.005 M chloroauric acid (HAuCl4), and 0.01 M sodium borohydride (NaBH4) solution. Gold nanoparticles with spherical morphology was achieved by growth by aggregation at room temperature, while to achieve the rod morphology 0.1 M silver nitrate (AgNO3) and 0.1 M ascorbic acid solution were added. The gold nanoparticles obtained by the seed-mediated synthesis have spherical or rod shapes, depending on the experimental conditions, and a uniform particle size. Surface functionalization was developed using polyethylene glycol. Morphology, and size distribution of AuNPs were evaluated by Field Emission Scanning Electron Microscopy. The average size of AuNSs, and AuNRs was 7.85nm and 7.96 x 31.47nm respectively. Fourier transform infrared spectrometry was performed to corroborate the presence of PEG in the AuNPs surface. Additionally, suspensions of AuNSs and AuNRs were evaluated by UV-Vis spectroscopy. Gold nanoparticles were stored for several days at room temperature and it was observed that the colloidal stability increased once gold nanoparticles were coated with PEG due to the shield formed in the surface of the NPs and the increase in size which were 9.65±1.90 nm of diameter for AuNSs and for AuNRs were 29.03±5.88 and 8.39±1.02 nm for length and transverse axis, respectively.

Synthesis and Characterization of Silver Nanoplates by a Seed-mediated Method

2019 ◽  
Vol 29 (3) ◽  
Author(s):  
Mai Ngọc Tuan Anh
Keyword(s):  
Hydrogen Peroxide ◽  
Silver Nanoparticles ◽  
Ascorbic Acid ◽  
Silver Nitrate ◽  
Sodium Borohydride ◽  
Trisodium Citrate ◽  
Synthesis And Characterization ◽  
Silver Nanoplates ◽  
Seed Mediated

Silver nanoplates (SNPs) having different size were synthesized by a seed-mediated method. The seeds -silver nanoparticles with 4 – 6 nm diameters were synthesized first by reducing silver nitrate with sodium borohydride in the present of Trisodium Citrate and Hydrogen peroxide. Then these seeds were developed by continue reducing Ag\(^+\) ions with various amount of L-Ascorbic acid to form SNPs. Our analysis showed that the concentratrion of L-Ascorbic acid, a secondary reducing agent, played an important role to form SNPs. In addition, the size and in-plane dipole plasmon resonance wavelenght of silver nanoplates were increased when the concentration of added silver nitrate increased. The characterization of SNPs were studied by UV-Vis, FE-SEM, EDS and TEM methods.

The interact of photons of light with photonic gold nanocrystals prepared using eriocephalus punctulatus assisted poly-yol route

Optik ◽  
2020 ◽  
Vol 224 ◽  
pp. 165543
Author(s):  
L.A.M. Al-Sagheer ◽  
Ahmed Alshehrie ◽  
W. Elsayed
Keyword(s):  
Gold Nanocrystals

Facet-dependent gold nanocrystals for effective photothermal killing of bacteria

2021 ◽  
Vol 407 ◽  
pp. 124617
Author(s):  
Sibidou Yougbaré ◽  
Hung-Lung Chou ◽  
Chao-Hsuan Yang ◽  
Dyah Ika Krisnawati ◽  
Achmad Jazidie ◽  
...  
Keyword(s):  
Gold Nanocrystals
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