scholarly journals Facile meltPEGylation of flame-made luminescent Tb3+-doped yttrium oxide particles: hemocompatibility, cellular uptake and comparison to silica

2018 ◽  
Vol 54 (23) ◽  
pp. 2914-2917 ◽  
Author(s):  
Kerda Keevend ◽  
Guido Panzarasa ◽  
Fabian H. L. Starsich ◽  
Martin Zeltner ◽  
Anastasia Spyrogianni ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Yttrium Oxide ◽  
Cellular Uptake ◽  
Metal Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
One Pot ◽  
Oxide Particles

MeltPEGylation constitutes an elegant one-pot route for the efficient PEGylation of metal oxide nanoparticles with improved hemo- and cytocompatibility.

scholarly journals Synthetic versatility of nanoparticles: A new, rapid, one-pot, single-step synthetic approach to spherical mesoporous (metal) oxide nanoparticles using supercritical alcohols

2014 ◽  
Vol 86 (5) ◽  
pp. 785-800 ◽  
Author(s):  
Pengyu Wang ◽  
Kazuya Kobiro
Keyword(s):  
Metal Oxide ◽  
Metal Oxide Nanoparticles ◽  
Single Step ◽  
Oxide Nanoparticles ◽  
Synthetic Approach ◽  
Organic Additives ◽  
Step Method ◽  
One Pot ◽  
Mesoporous Metal ◽  
Mesoporous Metal Oxide

AbstractA simple, rapid (10 min), one-pot, single-step method for the preparation of solid and hollow spherical porous TiO2 nanoparticles with large surface areas (100–211 m2/g) was developed in supercritical alcohols using carboxylic acids as organic additives. The shell thickness of the hollow TiO2 nanoparticles (20–280 nm) was controlled by adjusting the heating rate (2.0–10.0 °C/min). The preparation of different spherical porous metal oxide nanoparticles, including CeO2, SiO2, TiO2, ZrO2, and ZnO, demonstrated the versatility of the synthetic approach. In addition, several rare earth-doped spherical mesoporous metal oxide nanoparticles, including CeO2:Er, CeO2:Er,Yb, ZrO2:Er, and TiO2:Er, which exhibit energy upconversion emission, were successfully prepared using this one-pot, single-step, supercritical methanol method. The obtained spherical mesoporous CeO2:Er and CeO2:Er,Yb nanoparticles emit green light upon excitation, even when irradiated with a low-power IR laser (980 nm, 10 mW) without calcination. Several other (metal) elements were also easily doped into spherical, mesoporous TiO2 nanoparticles, such as Eu, Ce, Yb, Fe, and N, using a similar procedure. Furthermore, the spherical mesoporous TiO2 nanoparticles were successfully applied as a new material for the transport of DNA via biolistic bombardment.

Cellular uptake and mutagenic potential of metal oxide nanoparticles in bacterial cells

Chemosphere ◽  
2011 ◽  
Vol 83 (8) ◽  
pp. 1124-1132 ◽  
Author(s):  
Ashutosh Kumar ◽  
Alok K. Pandey ◽  
Shashi S. Singh ◽  
Rishi Shanker ◽  
Alok Dhawan
Keyword(s):  
Metal Oxide ◽  
Cellular Uptake ◽  
Metal Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Bacterial Cells ◽  
Mutagenic Potential

Size stabilization of nanoparticles by polysaccharides: Effectiveness in the wet and curing steps

2007 ◽  
Vol 22 (12) ◽  
pp. 3344-3354 ◽  
Author(s):  
Emanuela Callone ◽  
Giovanni Carturan ◽  
Marco Ischia ◽  
Adriana Sicurelli
Keyword(s):  
Metal Oxide ◽  
Metal Oxide Nanoparticles ◽  
Degree Of Polymerization ◽  
Oxide Nanoparticles ◽  
X Ray Diffraction ◽  
Organic Part ◽  
Transmission Electron ◽  
Stabilization Effect ◽  
Oxide Particles

Starch suspension proves to be a useful matrix for the hydrolytic route to metal oxide nanoparticles, due to its size-stabilization effect, which works also at high temperatures. To understand the type of interaction between the organic part and the oxide particles, various parameters, such as viscosity, temperature, degree of polymerization, and organic/inorganic kinds of dispersant, are tested through x-ray diffraction (XRD), transmission electron microscopy (TEM), solid-state nuclear magnetic resonance (NMR), and thermogravimetric mass spectra (TG–MS) analyses of the obtained SnO2nanopowders. Results highlight the unique role of starch compared with other hydrophilic dispersants that do not ensure effective size stabilization on curing up to 600 °C. The proof comes from the study of pyrolysis of the residual organic groups surrounding the particles. They are chelating carboxylic species that prevent the coalescence among metal oxide nanoparticles.

Large-scale one pot synthesis of metal oxide nanoparticles by decomposition of metal carbonates or nitrates

CrystEngComm ◽  
2015 ◽  
Vol 17 (27) ◽  
pp. 4977-4981 ◽  
Author(s):  
Byeongyoon Kim ◽  
Jun Kim ◽  
Hionsuck Baik ◽  
Kwangyeol Lee
Keyword(s):  
Metal Oxide ◽  
Large Scale ◽  
Metal Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
One Pot ◽  
One Pot Synthesis ◽  
Metal Carbonates
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