Generalized Preparation of Porous Nanocrystalline ZnFe2O4 Superstructures from Zinc Ferrioxalate Precursor and Its Superparamagnetic Property

2008 ◽  
Vol 112 (34) ◽  
pp. 13163-13170 ◽  
Author(s):  
Man Wang ◽  
Zhihui Ai ◽  
Lizhi Zhang
Keyword(s):  
Superparamagnetic Property

Superparamagnetic property and high microwave absorption performance of FeAl@(Al, Fe)2O3 nanoparticles induced by surface oxidation

2015 ◽  
Vol 3 (24) ◽  
pp. 6232-6239 ◽  
Author(s):  
Tong Liu ◽  
Yu Pang ◽  
Hiroaki Kikuchi ◽  
Yasuhiro Kamada ◽  
Seiki Takahashi
Keyword(s):  
Microwave Absorption ◽  
Hydrogen Plasma ◽  
Surface Oxidation ◽  
Reaction Method ◽  
Superparamagnetic Property ◽  
Passivation Process ◽  
Absorption Performance ◽  
Microwave Absorption Performance

FeAl@(Al, Fe)2O3 nanoparticles are prepared by the hydrogen plasma-metal reaction method and passivation process. The formation of an Fe-enriched zone offers these nanoparticles superparamagnetic property and high microwave absorption performance.

scholarly journals Immobilizing Alcalase® Enzyme onto Magnetic Nanoparticles

2014 ◽  
Vol 24 (3S1) ◽  
pp. 121-126
Author(s):  
Cao Xuan Huu ◽  
Nguyen Bao Linh ◽  
Nguyen Thi Hoang Yen ◽  
Dang Duc Long
Keyword(s):  
Magnetic Nanoparticles ◽  
Alkaline Protease ◽  
Immobilized Enzyme ◽  
Biological Molecules ◽  
Covalent Attachment ◽  
Covalent Bonds ◽  
External Magnet ◽  
Superparamagnetic Property ◽  
Ft Ir ◽  
Reaction Media

In recent years, magnetic nanoparticles (MNPs) have been applied to numerous biological systems. The nanoparticles are particularly useful in separating biological molecules due to its low price, scalable ability and very little interference. Here, MNPs, which can efficiently separate biocatalysts from reaction media by external magnet, was used to immobilize an alkaline protease (Alcalase®). Covalent attachment of the enzyme to MNPs began with the functionalization of the MNPs' surface with amines (APTES). Then, glutaraldehyde was introduced to link the MNP surface amines with enzyme surface amine residues, typically lysine. Successful covalent bonds were checked by FT-IR. Our results showed the attached enzyme did not affect superparamagnetic property of MNPs, therefore the MNPs-attached enzyme was easily recovered after the reaction. The immobilized enzyme maintained its activities after 10 times of recycle uses.

Role of Zn dopant on superparamagnetic property of CoFe2O4 nanoparticles

2019 ◽  
Vol 125 (10) ◽  
Author(s):  
P. Monisha ◽  
P. Priyadharshini ◽  
S. S. Gomathi ◽  
M. Mahendran ◽  
K. Pushpanathan
Keyword(s):  
Cofe2o4 Nanoparticles ◽  
Superparamagnetic Property ◽  
Role Of Zn
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