Preparation and Characterization of Silica-Coated Indium Oxide Nanoparticles

2008 ◽  
Vol 8 (11) ◽  
pp. 5720-5724 ◽  
Author(s):  
Ming Zhang ◽  
Lifang Shi ◽  
Charles J. O'Connor
Keyword(s):  
Indium Oxide ◽  
Photoluminescence Property ◽  
Silica Coating ◽  
Physical Structure ◽  
Silica Shell ◽  
Oxide Nanoparticles ◽  
Reverse Microemulsion Method ◽  
Oxide Particles ◽  
Average Size

Silica-coated Indium oxide nanoparticles have been successfully synthesized by a modified reverse microemulsion method and characterized by TEM, XRD, EDS and luminescence spectrometer; the single crystal particles are encapsulated by a smooth and uniform silica shell (average size approximately 35 nm in diameter) and show photoluminescence property. The size of the particles and the thickness of the shells can be controlled by adjust the ratio of the reaction agents. The physical structure and optical property of Indium oxide particles remain same during the silica coating process.

scholarly journals Preparation and Characterization of Polyethylene Glycol Coating Iron Oxide Nanoparticles for Curcumin Delivery

2019 ◽  
Vol 31 (8) ◽  
pp. 1719-1723
Author(s):  
Nguyen Thi Thanh Thuy ◽  
Le Duc Anh ◽  
Nguyen Huu Tri ◽  
Cu Van Hoang ◽  
Nguyen Anh Nhut
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Sonication Time ◽  
X Ray Diffraction ◽  
Target Drug Delivery ◽  
Target Drug ◽  
Fe3o4 Nps ◽  
Average Size

The PEG-coated iron oxide nanoparticles (Fe3O4 NPs-PEG) was synthesized by coprecipitation and ultrasonication method. X-ray diffraction results exhibited that the average size of Fe3O4 NPs-PEG was 19.10 nm, which was further confirmed in TEM imaging. In addition, sonication time and curcumin concentration were studied to evaluate the efficiency of loading curcumin onto Fe3O4 NPs-PEG. Further, statistical optimization using response surface methodology (RSM) has shown curcumin concentration (0,01% w/v) and sonication time (21 min) for maximal curcumin loading (0.37 mg/g). Along with the magnetization studies, the immobilization of curcumin onto the Fe3O4 NPs-PEG was characterized by UV, FTIR and SEM. The results showed that the curcumin loaded PEG coated iron oxide nanoparticles could potentially be used for magnetically target drug delivery.

Morphological, structural, and gas-sensing characterization of tin-doped indium oxide nanoparticles

2014 ◽  
Vol 40 (1) ◽  
pp. 1321-1328 ◽  
Author(s):  
A. Ayeshamariam ◽  
M. Kashif ◽  
M. Bououdina ◽  
U. Hashim ◽  
M. Jayachandran ◽  
...  
Keyword(s):  
Indium Oxide ◽  
Gas Sensing ◽  
Oxide Nanoparticles

Synthesis and Characterization of Indium Oxide Nanoparticles

Nano Letters ◽  
2001 ◽  
Vol 1 (6) ◽  
pp. 287-289 ◽  
Author(s):  
Amith Murali ◽  
Anirudha Barve ◽  
Valerie J. Leppert ◽  
Subhash H. Risbud ◽  
Ian M. Kennedy ◽  
...  
Keyword(s):  
Indium Oxide ◽  
Synthesis And Characterization ◽  
Oxide Nanoparticles

Green Synthesis and Characterization of Indium Oxide Nanoparticles Using Borassus flabellifer (Toddy Palm)

2017 ◽  
Vol 9 (3) ◽  
pp. 209-211
Author(s):  
Ch. Kanchana Latha ◽  
Y. Aparna ◽  
Ramchander Merugu ◽  
P. Srinivas Subba Rao
Keyword(s):  
Green Synthesis ◽  
Indium Oxide ◽  
Synthesis And Characterization ◽  
Oxide Nanoparticles

Synthesis and Characterization of SiO2/(PMMA/Fe3O4) Magnetic Nanocomposites

2008 ◽  
Vol 8 (4) ◽  
pp. 1797-1802
Author(s):  
Zhifei Wang ◽  
Yafei Guo ◽  
Song Li ◽  
Yueming Sun ◽  
Nongyue He
Keyword(s):  
Magnetic Nanoparticles ◽  
Critical Concentration ◽  
Silica Coating ◽  
Silica Shell ◽  
Silica Nanocomposites ◽  
Stöber Process ◽  
Magnetic Silica ◽  
Biomedical Field ◽  
Pmma Polymer

Magnetic silica nanocomposites (magnetic nanoparticles core coated by silica shell) have the wide promising applications in the biomedical field and usually been prepared based on the famous Stöber process. However, the flocculation of Fe3O4 nanoparticles easily occurs during the silica coating, which limits the amount of magnetic silica particles produced in the Stöber process. In this paper, PMMA/Fe3O4 nanoparticles were used in the Stöber process instead of the “nude” Fe3O4 nanoparticles. And coating Fe3O4 with PMMA polymer beforehand can prevent magnetic nanoparticles from the aggregation that usually comes from the increasing of ionic strength during the hydrolyzation of tetraethoxysilane (TEOS) by the steric hindrance. The results show that the critical concentration of magnetic nanoparticles can increase from 12 mg/L for “nude” Fe3O4 nanoparticles to 3 g/L for PMMA/Fe3O4 nanoparticles during the Stöber process. And before the deposition of silica shell, the surface of PMMA/Fe3O4 nanoparticles had to be further modified by hydrolyzing them in CH3OH/NH3˙H2O mixture solution, which provides the carboxyl groups on their surface to react further with the silanol groups of silicic acid.

scholarly journals Preparation and Characterization of Silica-Coated Iron Oxide Nanoparticles (Fe3O4@SiO2 NPs)

2021 ◽  
Vol 18 (1) ◽  
pp. 161
Author(s):  
Nurul Izza Taib ◽  
Famiza Abdul Latif ◽  
Nur Diyana Syazwani Zambri
Keyword(s):  
Iron Oxide ◽  
Alkaline Medium ◽  
Biomedical Applications ◽  
Tetraethyl Orthosilicate ◽  
Oxide Nanoparticles ◽  
Hydrolysis And Condensation ◽  
Average Size ◽  
Superparamagnetic Properties ◽  
Fe3o4 Core

In this study, this SiO2 has been coated on the surface of Fe3O4 (Fe3O4@SiO2) by hydrolysis and condensation of tetraethyl orthosilicate (TEOS) under alkaline medium at 80oC. It was found that only 500  mL TEOS is required to obtain the best coated Fe3O4 core structures which has been confirmed from its TEM micrograph. FTIR analyses revealed the formation of Si-O-Si bonds at 1084.2–1101.4 cm-1 hence confirmed that SiO2 has been successfully coated the Fe3O4 core. From the FESEM analyses, the average size of silica was ~ 50 -70 nm.  EDX of the Fe3O4@SiO2 showed that silica had been effectively bonded onto the surface of Fe3O4. The VSM measurements confirmed the superparamagnetic properties of Fe3O4@SiO2 that is desirable for biomedical applications.

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