Polyvinylpyrrolidone Molecular Weight Controls Silica Shell Thickness on Au Nanoparticles with Diglycerylsilane as Precursor

2012 ◽  
Vol 4 (8) ◽  
pp. 3980-3986 ◽  
Author(s):  
Alan Vanderkooy ◽  
Michael A. Brook
Keyword(s):  
Molecular Weight ◽  
Shell Thickness ◽  
Au Nanoparticles ◽  
Silica Shell

Effect of silica shell thickness of Fe3O4–SiOx core–shell nanostructures on MRI contrast

2013 ◽  
Vol 15 (3) ◽  
Author(s):  
Hrushikesh M. Joshi ◽  
Mrinmoy De ◽  
Felix Richter ◽  
Jiaqing He ◽  
P. V. Prasad ◽  
...  
Keyword(s):  
Shell Thickness ◽  
Silica Shell ◽  
Core Shell ◽  
Mri Contrast ◽  
Shell Nanostructures

Adsorption energy of small molecules on core–shell Fe@Au nanoparticles: tuning by shell thickness

2016 ◽  
Vol 18 (13) ◽  
pp. 9112-9123 ◽  
Author(s):  
Magali Benoit ◽  
Nathalie Tarrat ◽  
Joseph Morillo
Keyword(s):  
Density Functional Theory ◽  
Small Molecules ◽  
Adsorption Energy ◽  
Density Functional ◽  
Shell Thickness ◽  
Au Nanoparticles ◽  
Core Shell ◽  
Gold Surfaces ◽  
Functional Theory

The adsorption of several small molecules on different gold surfaces, Au(001), strained Au(001) and Au(001) epitaxied on Fe(001), has been characterized using density functional theory.

Silica-Shell/Oil-Core Microcapsules with Controlled Shell Thickness and Their Breakage Stress

Langmuir ◽  
2009 ◽  
Vol 25 (14) ◽  
pp. 7962-7966 ◽  
Author(s):  
Michael O’Sullivan ◽  
Zhibing Zhang ◽  
Brian Vincent
Keyword(s):  
Shell Thickness ◽  
Silica Shell

Control of shell thickness in silica-coating of Au nanoparticles and their X-ray imaging properties

2011 ◽  
Vol 358 (2) ◽  
pp. 329-333 ◽  
Author(s):  
Yoshio Kobayashi ◽  
Hiromitsu Inose ◽  
Tomohiko Nakagawa ◽  
Kohsuke Gonda ◽  
Motohiro Takeda ◽  
...  
Keyword(s):  
Shell Thickness ◽  
Au Nanoparticles ◽  
Silica Coating ◽  
X Ray ◽  
X Ray Imaging ◽  
Imaging Properties

Structural controls of AuNR@mSiO2: tuning of the SPR, and manipulation of the silica shell thickness and structure

2016 ◽  
Vol 4 (13) ◽  
pp. 2614-2620 ◽  
Author(s):  
Zihua Wu ◽  
Qiang Zeng ◽  
Haishui Wang
Keyword(s):  
Shell Thickness ◽  
Silica Shell ◽  
Selective Etching ◽  
Structural Controls

End-selective etching the AuNRs of AuNR@mSiO2 can be managed to produce cavity-possessing, rattle-type, hollow, and shape-adaptive silica-coated nanocomposites.

scholarly journals Fabrication of Stable Nanofiber Matrices for Tissue Engineering via Electrospinning of Bare Laser-Synthesized Au Nanoparticles in Solutions of High Molecular Weight Chitosan

Nanomaterials ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 1058 ◽  
Author(s):  
Viraj P. Nirwan ◽  
Ahmed Al-Kattan ◽  
Amir Fahmi ◽  
Andrei V. Kabashin
Keyword(s):  
Tissue Engineering ◽  
Molecular Weight ◽  
High Molecular Weight ◽  
Au Nanoparticles ◽  
Hybrid Nanofibers ◽  
Prolonged Contact ◽  
Ligand Free ◽  
The Mean ◽  
Biological Environment ◽  
Phosphate Buffered Saline

We report a methodology for the fabrication of neutralized chitosan-based nanofiber matrices decorated with bare Au nanoparticles, which demonstrate stable characteristics even after prolonged contact with a biological environment. The methodology consists of electrospinning of a mixture of bare (ligand-free) laser-synthesized Au nanoparticles (AuNPs) and solutions of chitosan/polyethylene oxide (ratio 1/3) containing chitosan of a relatively high molecular weight (200 kDa) and concentration of 3% (w/v). Our studies reveal a continuous morphology of hybrid nanofibers with the mean fiber diameter of 189 nm ± 86 nm, which demonstrate a high thermal stability. Finally, we describe a protocol for the neutralization of nanofibers, which enabled us to achieve their structural stability in phosphate-buffered saline (PBS) for more than six months, as confirmed by microscopy and FTIR measurements. The formed hybrid nanofibers exhibit unique physicochemical properties essential for the development of future tissue engineering platforms.

TiO2@Silica nanoparticles in a random laser: Strong relationship of silica shell thickness on scattering medium properties and random laser performance

2014 ◽  
Vol 104 (8) ◽  
pp. 081909 ◽  
Author(s):  
Ernesto Jimenez-Villar ◽  
Valdeci Mestre ◽  
Paulo C. de Oliveira ◽  
Wagner M. Faustino ◽  
D. S. Silva ◽  
...  
Keyword(s):  
Silica Nanoparticles ◽  
Shell Thickness ◽  
Strong Relationship ◽  
Silica Shell ◽  
Random Laser ◽  
Scattering Medium ◽  
Laser Performance ◽  
Relationship Of

Study on the Ag@SiO2 Enhanced the Luminous Intensity of the Terbium Complexes with Benzoic Acid and 1,10-phenanthroline

2014 ◽  
Vol 472 ◽  
pp. 711-714 ◽  
Author(s):  
Bin Yue ◽  
Yuan Li ◽  
Kai Kong ◽  
Hai Bin Chu ◽  
Yong Liang Zhao
Keyword(s):  
Benzoic Acid ◽  
Emission Intensity ◽  
Shell Thickness ◽  
Silica Shell ◽  
Excitation Wavelength ◽  
Core Shell ◽  
Enhanced Fluorescence ◽  
The Core ◽  
Transmission Electron ◽  
Terbium Complexes

Five kinds of terbium complexes have been synthesized respectively with benzoic acid, 1,10-phenanthroline and 2,2'-bipyridine as ligands. The core-shell Ag@SiO2nanocomposites was prepared. The result of transmission electron microscopy (TEM) shows the diameter of the nanosilver is about 50 nm and the thickness of the silica shell is 10, 25 and 80 nm. Combine the nanoparticles composite with terbium complexes, we explore the changes of excitation wavelength and emission intensity. The results show that: by loading the terbium complexes above the different size of nanoparticles, the excitation wavelengths of complexes do not shift, and the emission intensity of the complexes are enhanced in the presence of Ag@SiO2nanoparticles because of metal-enhanced fluorescence (MEF), but at only a limited shell thickness particle region.

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