Inverse Nonionic Microemulsion Studied by Means of1H,13C, and PGSTE NMR during Silica Nanoparticle Synthesis

Langmuir ◽  
2009 ◽  
Vol 25 (5) ◽  
pp. 3224-3231 ◽  
Author(s):  
Fioretta Asaro ◽  
Alvise Benedetti ◽  
Nina Savko ◽  
Giorgio Pellizer
Keyword(s):  
Nanoparticle Synthesis ◽  
Silica Nanoparticle

Silica Nanoparticle Synthesis and Multi-Method Characterisation

2019 ◽  
Vol 947 ◽  
pp. 82-90
Author(s):  
Pirutchada Musigapong ◽  
Sophie Marie Briffa ◽  
Iseult Lynch ◽  
Siriwat Soontaranon ◽  
N. Chanlek ◽  
...  
Keyword(s):  
Particle Size ◽  
Sol Gel ◽  
Nanoparticle Synthesis ◽  
Size Control ◽  
Silica Nanoparticle ◽  
Radius Of Gyration ◽  
Hydrodynamic Diameter ◽  
X Ray Scattering ◽  
Transmission Electron ◽  
Diameter Core

The information provided by different characterisation methods when measuring particle size varies depending on the chosen technique and analytical approach (e.g. light scattering, transmission electron microscopy, spectroscopy, x-ray scattering). This in turn has an impact on the accuracy of the results as well as comparability between methods and overall confidence on the analyses. The present study used a common sol-gel reaction to synthesise amorphous silica nanoparticles (aSiNPs) and characterised the product purity and homogeneity. The reaction involved hydrolysis and condensation of tetraethyl orthosilicate (TEOS) in the presence of lysine, which acted as catalyst for the silica production and also as a capping agent for particle size control in a suspension kept at pH 8-10. According to DLS data, the stock suspension was stable for at least 6 months in Milli Q water without surfactant when kept at 4°C. This study focused on multi-method size and shape characterisation of the aSiNPs, involving the following techniques: DLS, TEM, FTIR, STEM and SAXS. These techniques provided information on hydrodynamic diameter, core particle dimensions, sphere equivalent size, and radius of gyration. Our results show two particle populations, one around 2 nm and the other around 7 nm in diameter. Notably, these two populations are not resolved (i.e. “visible”) by all methods used.

Bioinspired Approach to Silica Nanoparticle Synthesis Using Amine-Containing Block Copoly(vinyl ethers): Realizing Controlled Anisotropy

Langmuir ◽  
2019 ◽  
Vol 35 (33) ◽  
pp. 10846-10854
Author(s):  
Ayae Sugawara-Narutaki ◽  
Sachio Tsuboike ◽  
Yukari Oda ◽  
Atsushi Shimojima ◽  
Kira B. Landenberger ◽  
...  
Keyword(s):  
Nanoparticle Synthesis ◽  
Silica Nanoparticle ◽  
Vinyl Ethers

Controlling aqueous silica nanoparticle synthesis in the 10–100 nm range

2015 ◽  
Vol 51 (98) ◽  
pp. 17420-17423 ◽  
Author(s):  
Delyan R. Hristov ◽  
Eugene Mahon ◽  
Kenneth A. Dawson
Keyword(s):  
Nanoparticle Synthesis ◽  
Silica Nanoparticle ◽  
Single Step ◽  
Generation Rate ◽  
Nm Range ◽  
Aqueous Silica

Controlling monomer generation rate in different ways, we broaden the range of sizes attainable for single step aqueous silica nanoparticle synthesis.

Heparin conjugated silica nanoparticle synthesis

2012 ◽  
Vol 32 (7) ◽  
pp. 2037-2041 ◽  
Author(s):  
Brigida Silvestri ◽  
Alessandro Pezzella ◽  
Giuseppina Luciani ◽  
Aniello Costantini ◽  
Fabiana Tescione ◽  
...  
Keyword(s):  
Nanoparticle Synthesis ◽  
Silica Nanoparticle

scholarly journals Fast nucleation for silica nanoparticle synthesis using a sol–gel method

Nanoscale ◽  
2016 ◽  
Vol 8 (47) ◽  
pp. 19662-19667 ◽  
Author(s):  
Chandra K. Dixit ◽  
Snehasis Bhakta ◽  
Ajeet Kumar ◽  
Steven L. Suib ◽  
James F. Rusling
Keyword(s):  
Sol Gel ◽  
Nanoparticle Synthesis ◽  
Silica Nanoparticle ◽  
Gel Method ◽  
Sol Gel Method

scholarly journals Optimum processing parameters for coating polyester with silica nanoparticles using gravity sedimentation

2019 ◽  
Vol 21 (10) ◽  
Author(s):  
Zihan Lu ◽  
Huw Owens
Keyword(s):  
Photonic Crystal ◽  
Silica Nanoparticles ◽  
Nanoparticle Synthesis ◽  
Colloidal Suspensions ◽  
Silica Nanoparticle ◽  
Processing Parameters ◽  
Crystal Films ◽  
Replacement Technique ◽  
Coated Fabrics ◽  
Colour Appearance

Abstract Gao et al. have proposed a facile method of silica nanoparticle synthesis called the solvent varying technique (SVT). Silica nanoparticles (SNPs) have been synthesized using the SVT. The diameters of the SNPs produced by these recipes are sensitive to drying temperature especially when they are used to form photonic crystal films on the surface of textiles. The colour appearance of the coated fabrics can be affected by unused reactants from the colloidal suspensions. These form a thin layer on the surface of the SNPs, which can adversely affect the constructive interference of light from the photonic crystal. In this paper, the original SNP solutions have been processed using a centrifuge and solvent replacement technique in order to reduce this problem. A TEM was used to record the morphology of the surface of the original and centrifuged particles. The resultant images show that there were fewer impurities present on the surface of the centrifuged SNPs than that of the original SNPs. DLS was used to measure the diameters and dispersion of the original and the centrifuged particles. A spectrophotometer was used to measure the reflectance of the samples. The chromaticities of the coated fabrics using both the original and centrifuged SNPs dried at a range of temperatures (40 °C, 60 °C, 80 °C and 100 °C) have been compared. It was determined that the centrifuged SNPs could be dried at higher temperatures than previously reported with little effect on the colour appearance of the photonic crystals.

One-Step Hydrophobic Silica Nanoparticle Synthesis at the Air/Water Interface

2019 ◽  
Vol 7 (6) ◽  
pp. 6204-6212 ◽  
Author(s):  
Abul Bashar Mohammad Giasuddin ◽  
Anthony Cartwright ◽  
Kyle Jackson ◽  
David W. Britt
Keyword(s):  
Nanoparticle Synthesis ◽  
Silica Nanoparticle ◽  
Water Interface ◽  
Hydrophobic Silica ◽  
Air Water Interface ◽  
One Step

Nickel-Impregnated Silica Nanoparticle Synthesis and Their Evaluation for Biocatalyst Immobilization

2009 ◽  
Vol 160 (7) ◽  
pp. 1888-1895 ◽  
Author(s):  
Reddy Shetty Prakasham ◽  
G. Sarala Devi ◽  
Chaganti Subba Rao ◽  
V. S. S. Sivakumar ◽  
T. Sathish ◽  
...  
Keyword(s):  
Nanoparticle Synthesis ◽  
Silica Nanoparticle
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