The colloidal stability and core-shell structure of magnetite nanoparticles coated with alginate

2006 ◽  
Vol 253 (4) ◽  
pp. 2158-2164 ◽  
Author(s):  
X.Q. Xu ◽  
H. Shen ◽  
J.R. Xu ◽  
M.Q. Xie ◽  
X.J. Li
Keyword(s):  
Magnetite Nanoparticles ◽  
Shell Structure ◽  
Colloidal Stability ◽  
Core Shell ◽  
Core Shell Structure

Surface Engineering of Magnetite Nanoparticles by Plant Protein: Investigation into Magnetic Properties

2016 ◽  
Vol 11 ◽  
pp. 38-44 ◽  
Author(s):  
Amlan Kumar Das ◽  
Avinash Marwal ◽  
Vikram Pareek ◽  
Yagya Joshi ◽  
Apoorva
Keyword(s):  
Magnetite Nanoparticles ◽  
Shell Structure ◽  
Colloidal Stability ◽  
Surface Engineering ◽  
Thermo Gravimetric Analysis ◽  
Magnetic Behaviour ◽  
Plant Protein ◽  
Core Shell ◽  
Gravimetric Analysis ◽  
Core Shell Structure

The surface of the magnetite nanoparticles has been engineered by the proteins available in the leaf extract of Datura inoxia. Fourier Transform Infrared (FTIR) study and by thermo gravimetric analysis (TGA) confirms the bonding between metal ions and the amide carbonyl group preset in the plant protein confirming the formation of core-shell structure. The plant protein coated magnetic Fe3O4 nanoparticles under investigation have an average size of about 14 nm (˂20nm). The isothermal magnetization curve of the ferrofluid appears in S-like sigmoid shape showing soft nonhysteretic magnetic behaviour at room temperature. The saturation magnetization (MS), remanent magnetization (MR), squareness (MR/MS) and coercivity value (HC) increased with decreasing temperature from 300 K to 10 K. The increment of magnetization (45 to 53 emu/gm) might be due to the decrease in thermal energy while the enhancement of coercivity (0-208 Oe) is attributed to the exchange interaction at the interface between the ferromagnetic (Fe3O4) and diamagnetic surface layer of protein on the nanocrystalline magnetite. The magnetization value is much smaller in comparison with the bulk magnetite (92emu/g) due to surface spin disorder also approves core-shell structure of diamagnetic protein layer on the surface. The results show the ease of the synthesis to reinforce the colloidal stability where the super paramagnetic behaviour has been found to be restored. The core-shell moiety could play an important role in biological systems as a means of storing Fe+3 for an organism.

scholarly journals Multifunctional Polymeric Nanogels for Biomedical Applications

Gels ◽  
2021 ◽  
Vol 7 (4) ◽  
pp. 228
Author(s):  
Tisana Kaewruethai ◽  
Chavee Laomeephol ◽  
Yue Pan ◽  
Jittima Amie Luckanagul
Keyword(s):  
Drug Delivery ◽  
Delivery System ◽  
Shell Structure ◽  
Biomedical Applications ◽  
Colloidal Stability ◽  
Functionalized Polymers ◽  
Core Shell ◽  
Structural Components ◽  
Bioactive Substances ◽  
Core Shell Structure

Currently, research in nanoparticles as a drug delivery system has broadened to include their use as a delivery system for bioactive substances and a diagnostic or theranostic system. Nanogels, nanoparticles containing a high amount of water, have gained attention due to their advantages of colloidal stability, core-shell structure, and adjustable structural components. These advantages provide the potential to design and fabricate multifunctional nanosystems for various biomedical applications. Modified or functionalized polymers and some metals are components that markedly enhance the features of the nanogels, such as tunable amphiphilicity, biocompatibility, stimuli-responsiveness, or sensing moieties, leading to specificity, stability, and tracking abilities. Here, we review the diverse designs of core-shell structure nanogels along with studies on the fabrication and demonstration of the responsiveness of nanogels to different stimuli, temperature, pH, reductive environment, or radiation. Furthermore, additional biomedical applications are presented to illustrate the versatility of the nanogels.

scholarly journals Synthesis, characterization and adsorption capacity of lead(II) ions of Fe3O4/C core-shell structure materials

2021 ◽  
Vol 10 (2) ◽  
pp. 43-48
Author(s):  
Dang Le Hai ◽  
Trang Luu Thu ◽  
Hoang Tran Vinh ◽  
Doanh Vu Viet ◽  
Thu Le Dieu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Magnetite Nanoparticles ◽  
Shell Structure ◽  
Adsorption Process ◽  
Langmuir Model ◽  
Core Shell ◽  
Order Model ◽  
Pseudo Second Order ◽  
Core Shell Structure ◽  
Model Expression

Core shell magnetite nanoparticles (Fe3O4@C) as adsorbent for lead ions from aqueous solution were synthesized. The characteristics of the modified materials were analysed. It could also be shown that the adsorption isotherms were well described by the Langmuir model. The kinetic of the adsorption process was found to follow the pseudo-second-order model expression. Thermodynamic studies indicated that the adsorption process was feasible, spontaneous and endothermic.

Electrical Conductivity of Ni-YSZ Anode for SOFCs According to the Ni Powder Size Variations in Core-shell Structure

2015 ◽  
Vol 53 (4) ◽  
pp. 287-293
Author(s):  
Byung-Hyun Choi ◽  
Young Jin Kang ◽  
Sung-Hun Jung ◽  
Yong-Tae An ◽  
Mi-Jung Ji
Keyword(s):  
Electrical Conductivity ◽  
Shell Structure ◽  
Core Shell ◽  
Powder Size ◽  
Ni Powder ◽  
Core Shell Structure

Preparation of Porous Core/Shell Structure Fe$lt;inf$gt;2$lt;/inf$gt;O$lt;inf$gt;3$lt;/inf$gt;/Al Nanothermite Membrane by Template Method

2015 ◽  
Vol 30 (6) ◽  
pp. 610 ◽  
Author(s):  
ZHENG Guo-Qiang ◽  
ZHANG Wen-Chao ◽  
XU Xing ◽  
SHEN Rui-Qi ◽  
DENG Ji-Ping ◽  
...  
Keyword(s):  
Shell Structure ◽  
Template Method ◽  
Core Shell ◽  
Porous Core ◽  
Core Shell Structure

Functional properties of BaTiO3–Ni0.5Zn0.5Fe2O4 magnetoelectric ceramics prepared from powders with core-shell structure

2010 ◽  
Vol 107 (10) ◽  
pp. 104106 ◽  
Author(s):  
L. P. Curecheriu ◽  
M. T. Buscaglia ◽  
V. Buscaglia ◽  
L. Mitoseriu ◽  
P. Postolache ◽  
...  
Keyword(s):  
Functional Properties ◽  
Shell Structure ◽  
Core Shell ◽  
Core Shell Structure

scholarly journals Ternary ZnO/Co3O4/NiO inherited layered core-shell structure from a double template for high performanced supercapacitor

2021 ◽  
Author(s):  
Linli Zhu ◽  
Chen Hao ◽  
Saisai Zhou ◽  
Xiaohong Wang ◽  
Tiantian Zhou ◽  
...  
Keyword(s):  
Shell Structure ◽  
Core Shell ◽  
Core Shell Structure

Composite nanoparticles with titania–poly(N-vinylamide) core–shell structure

2021 ◽  
Vol 31 (1) ◽  
pp. 24-26
Author(s):  
Galina M. Kuz’micheva ◽  
Olesya I. Timaeva ◽  
Irina P. Chikhacheva ◽  
Roman V. Svetogorov ◽  
Ratibor G. Chumakov ◽  
...  
Keyword(s):  
Shell Structure ◽  
Composite Nanoparticles ◽  
Core Shell ◽  
Core Shell Structure

Designing an Interlayer-Widened MoS2-Packed Nitrogen-Rich Carbon Nanotube Core–Shell Structure for Redox-Mediated Quasi-Solid-State Supercapacitors

2021 ◽  
Vol 4 (3) ◽  
pp. 2218-2230
Author(s):  
Sudhakaran Moopri Singer Pandiyarajan ◽  
Ganesh Kumar Veerasubramani ◽  
Roshan Mangal Bhattarai ◽  
Gnanaselvan Gnanasekaran ◽  
Sang Jae Kim ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Solid State ◽  
Shell Structure ◽  
Core Shell ◽  
Core Shell Structure
Sign in / Sign up

Export Citation Format

Share Document