scholarly journals Carbon Dots/Iron Oxide Nanoparticles With Tuneable Composition and Properties

2022 ◽  
Author(s):  
Joanna D Stachowska ◽  
Monika B Gamża ◽  
Claire Mellor ◽  
Ella N Gibbons ◽  
Marta J Krysmann ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Polyethylene Glycol ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Room Temperature ◽  
Antimicrobial Properties ◽  
Molar Ratio ◽  
Diagnostic Tools ◽  
Oxide Nanoparticles ◽  
Simple Strategy

We present a simple strategy to generate a family of carbon dot/iron oxide nanoparticles (C/Fe-NPs) that relies on the thermal decomposition of iron (III) acetylacetonate in the presence of a highly fluorescent carbon-rich precursor, while polyethylene glycol serves as the passivation agent. By varying the molar ratio of the reactants, a series of C/Fe-NPs have been synthesized with tuneable elemental composition in terms of C, H, O, N, Fe. The quantum yield is enhanced from 6% to 9% as the carbon content increases from 27% to 36%, while the room temperature saturation magnetization is improved from 4.1 emu/g to 17.7 emu/g as the iron content is enriched from 17 to 31%. In addition, the C/Fe-NPs show excellent antimicrobial properties, minimal cytotoxicity and demonstrate promising bioimaging capabilities, thus showing great potential for the development of advanced diagnostic tools.

Synthesis and Effect of Some Parameters through Reverse Micelles Route of Iron Oxide Nanoparticles

2009 ◽  
Vol 152-153 ◽  
pp. 205-208 ◽  
Author(s):  
H. Arabi ◽  
S. Nateghi ◽  
S. Sadeghi
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Reverse Micelles ◽  
Room Temperature ◽  
Molar Ratio ◽  
Oxide Nanoparticles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Significant Difference ◽  
Vibration Sample Magnetometer

Iron oxide nanoparticles were synthesis by reverse micelle method. X-ray diffraction technique and vibration sample magnetometer were applied to characterize the produced samples at different conditions and parameters for synthesis route. There is no significant difference between samples prepared at 5°C and room temperature except a better crystalline at room temperature. The molar ratio of water to surfactant (w parameter) and concentration of the salt solution on size and magnetic properties of nanoparticles have been investigated. Increasing w leads to producing particles with larger size i.e. for w=16.83, 11.22, and 5.6, particles size are 15.22, 11.66 and 10.5 nm, respectively. The size of nanoparticles are in the range of 9 to 20 nanometers

The distribution of the iron oxide nanoparticles modified with polyethylene glycol in rat brains

2021 ◽  
Vol 260 ◽  
pp. 124108
Author(s):  
Xianjia Yan ◽  
Guihua Han ◽  
Sheng Wang ◽  
Chuangang Chong ◽  
Dong Han ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles

Impact of the chain length on the biodistribution profiles of PEGylated iron oxide nanoparticles: a multimodal imaging study

2021 ◽  
Author(s):  
Dimitri Stanicki ◽  
Lionel Larbanoix ◽  
Sébastien Boutry ◽  
Thomas Vangijzegem ◽  
Indiana Ternad ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Iron Oxide ◽  
Chain Length ◽  
Iron Oxide Nanoparticles ◽  
Multimodal Imaging ◽  
Imaging Study ◽  
Superparamagnetic Iron Oxide ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Chain Lengths

Bimodal sub-5 nm superparamagnetic iron oxide nanoparticles (SPIO-5) coated with polyethylene glycol of different chain lengths (i.e. PEG-800, -2000 and -5000) have been prepared and characterized.

Iron oxide magnetic nanoparticles synthesized by atmospheric microplasmas

2014 ◽  
Vol 32 ◽  
pp. 1460343 ◽  
Author(s):  
Ying Wang ◽  
Parvin Kaur ◽  
Augustine Tuck Lee Tan ◽  
Rajveer Singh ◽  
Paul Choon Keat Lee ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Decomposition Method ◽  
Plasma Discharge ◽  
Oxide Nanoparticles ◽  
Thermal Decomposition Method ◽  
Soft Ferromagnetic ◽  
Iron Oxide Magnetic Nanoparticles ◽  
High Possibility

This paper presents the synthesis of iron oxide nanoparticles using the atmospheric microplasma (AMP). The properties of iron oxide nanoparticles synthesized using AMP are compared with particles (i) formed in as-prepared solution and (ii) prepared using thermal decomposition method. Iron oxide nanoparticles prepared by all the 3 treatment methods exhibit quite soft ferromagnetic properties with coercivities less than 10 G. The AMP synthesis technique was found to be more efficient and better than thermal decomposition method due to ultra-shorter experiment time (around 2.5 min) as compared to 90 min required for thermal decomposition method. Moreover, AMP synthesized nanoparticles are better isolated and of smaller size than thermal decomposition ones. The effect of plasma discharge timings on synthesized nanoparticles has also been studied in this work. Coercivity of synthesized nanoparticles decreases with the increasing plasma discharge timings from 3 to 10 min. The nanoparticles synthesized using plasma discharge timing of 10 min exhibit the smallest coercivity of around 3 G. This suggests a high possibility of achieving super-paramagnetic nanoparticles by optimizing the plasma discharge timings of AMP.

Synthesis of gadolinium oxide nanodisks and gadolinium doped iron oxide nanoparticles for MR contrast agents

2017 ◽  
Vol 5 (3) ◽  
pp. 418-422 ◽  
Author(s):  
Gurvinder Singh ◽  
Birgitte Hjelmeland McDonagh ◽  
Sjoerd Hak ◽  
Davide Peddis ◽  
Sulalit Bandopadhyay ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Iron Oxide ◽  
Contrast Agents ◽  
Iron Oxide Nanoparticles ◽  
Gadolinium Oxide ◽  
Oxide Nanoparticles ◽  
Mr Contrast Agents

Herein, we report the synthesis of differently sized gadolinium oxide nanodisks and gadolinium doped iron oxide spherical and cubic nanoparticles through the thermal decomposition of an oleate precursor.

scholarly journals Facile aqueous, room temperature preparation of high transverse relaxivity clustered iron oxide nanoparticles

2019 ◽  
Vol 570 ◽  
pp. 165-171 ◽  
Author(s):  
Nicholas J. Hobson ◽  
Xian Weng ◽  
Marianne Ashford ◽  
Nguyen T.K. Thanh ◽  
Andreas G. Schätzlein ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Room Temperature ◽  
Oxide Nanoparticles ◽  
Temperature Preparation
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