Synthesis of Stable Ligand-free Gold–Palladium Nanoparticles Using a Simple Excess Anion Method

ACS Nano ◽  
2012 ◽  
Vol 6 (8) ◽  
pp. 6600-6613 ◽  
Author(s):  
Meenakshisundaram Sankar ◽  
Qian He ◽  
Moataz Morad ◽  
James Pritchard ◽  
Simon J. Freakley ◽  
...  
Keyword(s):  
Palladium Nanoparticles ◽  
Free Gold ◽  
Ligand Free

scholarly journals Injection of ligand-free gold and silver nanoparticles into murine embryos does not impact pre-implantation development

2014 ◽  
Vol 5 ◽  
pp. 677-688 ◽  
Author(s):  
Ulrike Taylor ◽  
Wiebke Garrels ◽  
Annette Barchanski ◽  
Svea Peterson ◽  
Laszlo Sajti ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Embryo Development ◽  
Internal Control ◽  
Blastocyst Stage ◽  
Pcr Analysis ◽  
Gold And Silver Nanoparticles ◽  
Free Gold ◽  
Ligand Free ◽  
Murine Embryos ◽  
And Control

Intended exposure to gold and silver nanoparticles has increased exponentially over the last decade and will continue to rise due to their use in biomedical applications. In particular, reprotoxicological aspects of these particles still need to be addressed so that the potential impacts of this development on human health can be reliably estimated. Therefore, in this study the toxicity of gold and silver nanoparticles on mammalian preimplantation development was assessed by injecting nanoparticles into one blastomere of murine 2 cell-embryos, while the sister blastomere served as an internal control. After treatment, embryos were cultured and embryo development up to the blastocyst stage was assessed. Development rates did not differ between microinjected and control groups (gold nanoparticles: 67.3%, silver nanoparticles: 61.5%, sham: 66.2%, handling control: 79.4%). Real-time PCR analysis of six developmentally important genes (BAX, BCL2L2, TP53, OCT4, NANOG, DNMT3A) did not reveal an influence on gene expression in blastocysts. Contrary to silver nanoparticles, exposure to comparable Ag+-ion concentrations resulted in an immediate arrest of embryo development. In conclusion, the results do not indicate any detrimental effect of colloidal gold or silver nanoparticles on the development of murine embryos.

scholarly journals Ligand-free gold nanoclusters confined in mesoporous silica nanoparticles for styrene epoxidation

2020 ◽  
Vol 2 (4) ◽  
pp. 1437-1442
Author(s):  
Buthainah Al-Shankiti ◽  
Walid Al-Maksoud ◽  
Madathumpady Abubaker Habeeb Muhammed ◽  
Dalaver H. Anjum ◽  
Basem Moosa ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Metal Ions ◽  
Silica Nanoparticles ◽  
Mesoporous Silica Nanoparticles ◽  
Gold Nanoclusters ◽  
Reducing Agents ◽  
Styrene Epoxidation ◽  
Novel Approach ◽  
Free Gold ◽  
Ligand Free

We present a novel approach to produce gold nanoclusters (Au NCs) in the pores of mesoporous silica nanoparticles (MSNs) by sequential and controlled addition of metal ions and reducing agents.

Ligand-free gold nanoparticles as colorimetric probes for the non-destructive determination of total dithiocarbamate pesticides after solid phase extraction

Talanta ◽  
2014 ◽  
Vol 119 ◽  
pp. 276-283 ◽  
Author(s):  
Kyriakos M. Giannoulis ◽  
Dimosthenis L. Giokas ◽  
George Z. Tsogas ◽  
Athanasios G. Vlessidis
Keyword(s):  
Gold Nanoparticles ◽  
Solid Phase Extraction ◽  
Solid Phase ◽  
Phase Extraction ◽  
Free Gold ◽  
Ligand Free ◽  
Non Destructive

Ligand-free Gold Nanoparticles as a Reference Material for Kinetic Modelling of Catalytic Reduction of 4-Nitrophenol

2015 ◽  
Vol 145 (5) ◽  
pp. 1105-1112 ◽  
Author(s):  
Sasa Gu ◽  
Julian Kaiser ◽  
Galina Marzun ◽  
Andreas Ott ◽  
Yan Lu ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Reference Material ◽  
Catalytic Reduction ◽  
Kinetic Modelling ◽  
Free Gold ◽  
Ligand Free
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