Shaping iron oxide nanocrystals for magnetic separation applications

Nanoscale ◽  
2018 ◽  
Vol 10 (43) ◽  
pp. 20462-20467 ◽  
Author(s):  
Martín Testa-Anta ◽  
Sara Liébana-Viñas ◽  
Beatriz Rivas-Murias ◽  
Benito Rodríguez González ◽  
Michael Farle ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Iron Oxide ◽  
Magnetic Separation ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Magnetophoretic Mobility

The large magnetophoretic mobility stemming from the large magnetic susceptibility and the very small coercivity of octapod-shaped iron oxide nanoparticles improve their capability for magnetic separation.

Magnetic Separation of Antibodies with High Binding Capacity by Site-Directed Immobilization of Protein A-Domains to Bare Iron Oxide Nanoparticles

2021 ◽  
Author(s):  
Yasmin Kaveh-Baghbaderani ◽  
Raphaela Allgayer ◽  
Sebastian Patrick Schwaminger ◽  
Paula Fraga-García ◽  
Sonja Berensmeier
Keyword(s):  
Iron Oxide ◽  
Magnetic Separation ◽  
Iron Oxide Nanoparticles ◽  
Binding Capacity ◽  
Protein A ◽  
Oxide Nanoparticles ◽  
High Binding ◽  
A Domains

Magnetic separation of polymer hybrid iron oxide nanoparticles triggered by temperature

2006 ◽  
pp. 2765 ◽  
Author(s):  
Yabin Sun ◽  
Xiaobin Ding ◽  
Zhaohui Zheng ◽  
Xu Cheng ◽  
Xinhua Hu ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Magnetic Separation ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Polymer Hybrid

Synthesis and Characterization of L-Lysin Coated Iron Oxide Nanoparticles as Appropriate Choices for Cell Immobilization and Magnetic Separation

2019 ◽  
Vol 9 (4) ◽  
pp. 462-466 ◽  
Author(s):  
Mohammad Javad Raee ◽  
Alireza Ebrahiminezhad ◽  
Mohammad Bagher Ghoshoon ◽  
Ahmad Gholami ◽  
Younes Ghasemi
Keyword(s):  
Iron Oxide ◽  
Magnetic Separation ◽  
Iron Oxide Nanoparticles ◽  
Cell Separation ◽  
Culture Media ◽  
Cell Immobilization ◽  
Good Alternative ◽  
Oxide Nanoparticles ◽  
Bacterial Cells ◽  
Separation Processes

Introduction:Cell separation is one of the important steps of purification in downstream processes. Some separation techniques such as centrifugation and filtration are expensive and would affect cell viability. Magnetic separation can be a good alternative for laboratory and industrial cell separation processes.Methods:For this purpose, L-lysine coated Iron Oxide Nanoparticles (IONs) were synthesized and used for magnetic separation of Escherichia coli as the most applied microbial cell in biotechnological processes.Results:IONs have successfully decorated the bacterial cells and cells were completely separated by applying an external magnetic field.Conclusion:This study showed that coating of E. coli cells with IONs could help to isolate cells from culture media without using expensive instruments.

scholarly journals The magnetophoretic mobility and superparamagnetism of core-shell iron oxide nanoparticles with dual targeting and imaging functionality

Biomaterials ◽  
2010 ◽  
Vol 31 (22) ◽  
pp. 5842-5848 ◽  
Author(s):  
Faquan Yu ◽  
Lei Zhang ◽  
Yongzhuo Huang ◽  
Kai Sun ◽  
Allan E. David ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Core Shell ◽  
Dual Targeting ◽  
Magnetophoretic Mobility

scholarly journals Construction of a device for magnetic separation of superparamagnetic iron oxide nanoparticles

2015 ◽  
Vol 1 (1) ◽  
pp. 306-309 ◽  
Author(s):  
Kerstin Kläser ◽  
Matthias Graeser ◽  
Dirk Steinhagen ◽  
Kerstin Luedtke-Buzug
Keyword(s):  
Iron Oxide ◽  
Magnetic Separation ◽  
Iron Oxide Nanoparticles ◽  
Superparamagnetic Iron Oxide ◽  
Superparamagnetic Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Iron Oxide Particles ◽  
Huge Impact ◽  
Magnetic Resonance Imaging Mri ◽  
Particle Imaging

AbstractSuspensions of iron oxide particles, so called ferrofluids, are successfully used in various technical, biochemical and medical applications. For example they find use in the area of sensor engineering, magnetic resonance imaging (MRI) and especially magnetic particle imaging (MPI). MPI is a new tomographic imaging technique that determines the spatial distribution of superparamagnetic iron oxide nanoparticles (SPIONs). Besides a very high spatial and temporal resolution MPI provides quantitative realtime imageing. The nanoparticles cause a magnetization change that can be measured. As the particle size distribution has a huge impact on the magnetization behavior is an important parameter for optimization. While synthesizing, SPIONs particles with various dimensions are formed what necessitates a systematically separation by size. For this purpose a construction of a simple device for magnetic separation of SPIONs has been developed. First attemps of separation show the potential of this method.

scholarly journals Kinetics of Aggregation and Magnetic Separation of Multicore Iron Oxide Nanoparticles: Effect of the Grafted Layer Thickness

Nanomaterials ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 623 ◽  
Author(s):  
Hinda Ezzaier ◽  
Jéssica Marins ◽  
Cyrille Claudet ◽  
Gauvin Hemery ◽  
Olivier Sandre ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Layer Thickness ◽  
Magnetic Separation ◽  
Iron Oxide Nanoparticles ◽  
Dipolar Coupling ◽  
Molecular Layer ◽  
Adsorbed Layer ◽  
Capture Efficiency ◽  
Oxide Nanoparticles ◽  
Induced Aggregation

In this work, we have studied field-induced aggregation and magnetic separation—realized in a microfluidic channel equipped with a single magnetizable micropillar—of multicore iron oxide nanoparticles (IONPs) also called “nanoflowers” of an average size of 27 ± 4 nm and covered by either a citrate or polyethylene (PEG) monolayer having a thickness of 0.2–1 nm and 3.4–7.8 nm, respectively. The thickness of the adsorbed molecular layer is shown to strongly affect the magnetic dipolar coupling parameter because thicker molecular layers result in larger separation distances between nanoparticle metal oxide multicores thus decreasing dipolar magnetic forces between them. This simple geometrical constraint effect leads to the following important features related to the aggregation and magnetic separation processes: (a) Thinner citrate layer on the IONP surface promotes faster and stronger field-induced aggregation resulting in longer and thicker bulk needle-like aggregates as compared to those obtained with a thicker PEG layer; (b) A stronger aggregation of citrated IONPs leads to an enhanced retention capacity of these IONPs by a magnetized micropillar during magnetic separation. However, the capture efficiency Λ at the beginning of the magnetic separation seems to be almost independent of the adsorbed layer thickness. This is explained by the fact that only a small portion of nanoparticles composes bulk aggregates, while the main part of nanoparticles forms chains whose capture efficiency is independent of the adsorbed layer thickness but depends solely on the Mason number Ma. More precisely, the capture efficiency shows a power law trend Λ ∝ M a − n , with n ≈ 1.4–1.7 at 300 < Ma < 104, in agreement with a new theoretical model. Besides these fundamental issues, the current work shows that the multicore IONPs with a size of about 30 nm have a good potential for use in biomedical sensor applications where an efficient low-field magnetic separation is required. In these applications, the nanoparticle surface design should be carried out in a close feedback with the magnetic separation study in order to find a compromise between biological functionalities of the adsorbed molecular layer and magnetic separation efficiency.

Adsorption of proteins on oral Zn2+ doped iron oxide nanoparticles in mouse stomach and in vitro: triggering nanoparticle aggregation

Nanoscale ◽  
2020 ◽  
Vol 12 (44) ◽  
pp. 22754-22767
Author(s):  
Xiaoqin Wang ◽  
Jiachun Gong ◽  
Weihang Tan ◽  
Tingting Hu ◽  
Rui Rong ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Iron Oxide ◽  
Protein Adsorption ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Nanoparticle Aggregation ◽  
P Protein ◽  
Induced Aggregation

Protein adsorption-induced aggregation of Zn0.4Fe2.6O4 nanoparticles had no effect on their magnetic susceptibility.

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