Synthesis of Core–Shell Nanostructures of Co3O4@SiO2 with Controlled Shell Thickness (5–20 nm) and Hollow Shells of Silica

2011 ◽  
Vol 11 (4) ◽  
pp. 3405-3413 ◽  
Author(s):  
Sonalika Vaidya ◽  
Pallavi Thaplyal ◽  
K. V. Ramanujachary ◽  
S. E. Lofland ◽  
Ashok K. Ganguli
Keyword(s):  
Shell Thickness ◽  
Core Shell ◽  
Shell Nanostructures ◽  
20 Nm

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

Highly effective photodynamic inactivation of E. coli using gold nanorods/SiO2 core–shell nanostructures with embedded verteporfin

2015 ◽  
Vol 51 (91) ◽  
pp. 16365-16368 ◽  
Author(s):  
Kostiantyn Turcheniuk ◽  
Volodymyr Turcheniuk ◽  
Charles-Henri Hage ◽  
Tetiana Dumych ◽  
Rostyslav Bilyy ◽  
...  
Keyword(s):  
Urinary Tract Infection ◽  
Photodynamic Therapy ◽  
Gold Nanorods ◽  
Virulent Strain ◽  
Silica Shell ◽  
Core Shell ◽  
Photodynamic Inactivation ◽  
E Coli ◽  
Shell Nanostructures ◽  
20 Nm

The potential of gold nanorods coated with a 20 nm silica shell loaded with verteporfin as efficient NIR nanostructures for photodynamic therapy to eradicate a virulent strain of E. coli associated with urinary tract infection is described.

scholarly journals Synthesis and characterization of noble metal–titania core–shell nanostructures with tunable shell thickness

2017 ◽  
Vol 8 ◽  
pp. 2083-2093 ◽  
Author(s):  
Bartosz Bartosewicz ◽  
Marta Michalska-Domańska ◽  
Malwina Liszewska ◽  
Dariusz Zasada ◽  
Bartłomiej J Jankiewicz
Keyword(s):  
Noble Metal ◽  
Shell Thickness ◽  
Noble Metal Nanoparticles ◽  
Core Shell ◽  
Shell Nanostructures ◽  
Vis Spectroscopy ◽  
Metal Metal ◽  
Coating Method ◽  
Titania Coating

Core–shell nanostructures have found applications in many fields, including surface enhanced spectroscopy, catalysis and solar cells. Titania-coated noble metal nanoparticles, which combine the surface plasmon resonance properties of the core and the photoactivity of the shell, have great potential for these applications. However, the controllable synthesis of such nanostructures remains a challenge due to the high reactivity of titania precursors. Hence, a simple titania coating method that would allow better control over the shell formation is desired. A sol–gel based titania coating method, which allows control over the shell thickness, was developed and applied to the synthesis of Ag@TiO2 and Au@TiO2 with various shell thicknesses. The morphology of the synthesized structures was investigated using scanning electron microscopy (SEM). Their sizes and shell thicknesses were determined using tunable resistive pulse sensing (TRPS) technique. The optical properties of the synthesized structures were characterized using UV–vis spectroscopy. Ag@TiO2 and Au@TiO2 structures with shell thickness in the range of ≈40–70 nm and 90 nm, for the Ag and Au nanostructures respectively, were prepared using a method we developed and adapted, consisting of a change in the titania precursor concentration. The synthesized nanostructures exhibited significant absorption in the UV–vis range. The TRPS technique was shown to be a very useful tool for the characterization of metal–metal oxide core–shell nanostructures.

scholarly journals Coupled hard–soft spinel ferrite-based core–shell nanoarchitectures: magnetic properties and heating abilities

2020 ◽  
Vol 2 (8) ◽  
pp. 3191-3201 ◽  
Author(s):  
Marco Sanna Angotzi ◽  
Valentina Mameli ◽  
Claudio Cara ◽  
Anna Musinu ◽  
Claudio Sangregorio ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Shell Thickness ◽  
Spinel Ferrite ◽  
Magnetic Core ◽  
Core Shell ◽  
Core Size ◽  
Shell Nanostructures

The heating abilities of bi-magnetic core–shell nanostructures are studied depending on core size, nature of the shell, and shell thickness.

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