Biomarker imprinted magnetic core–shell nanoparticles for rapid, culture free detection of pathogenic bacteria

2021 ◽  
Vol 9 (10) ◽  
pp. 2436-2446
Author(s):  
Soumya Rajpal ◽  
Snehasis Bhakta ◽  
Prashant Mishra
Keyword(s):  
Magnetic Nanoparticles ◽  
Pathogenic Bacteria ◽  
Magnetic Core ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

A facile method for the fabrication of pyocyanin imprinted magnetic nanoparticles for the capture of toxin and culture free detection of pathogenic bacteria.

Enhanced magnetic properties and MRI performance of bi-magnetic core–shell nanoparticles

RSC Advances ◽  
2016 ◽  
Vol 6 (81) ◽  
pp. 77558-77568 ◽  
Author(s):  
Fernando Arteaga Cardona ◽  
Esmeralda Santillán Urquiza ◽  
Patricia de la Presa ◽  
Silvia Hidalgo Tobón ◽  
Umapada Pal ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Nanoparticles ◽  
Contrast Agents ◽  
Magnetic Core ◽  
Mri Contrast Agents ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Mri Contrast ◽  
Core Shell Nanoparticles

Two sets of bi-magnetic, biocompatible Zn0.5Mn0.5Fe2O4@Fe3O4 core–shell nanoparticles with enhanced magnetic properties were prepared. These bi-magnetic nanoparticles have a vast potential as MRI contrast agents.

scholarly journals Fabrication of copper(II)-coated magnetic core-shell nanoparticles Fe3O4@SiO2-2-aminobenzohydrazide and investigation of its catalytic application in the synthesis of 1,2,3-triazole compounds

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
H. Rajabi-Moghaddam ◽  
M. R. Naimi-Jamal ◽  
M. Tajbakhsh
Keyword(s):  
High Efficiency ◽  
Click Reaction ◽  
Magnetic Core ◽  
Core Shell ◽  
Isatoic Anhydride ◽  
Shell Nanoparticles ◽  
Triazole Derivatives ◽  
Catalytic Application ◽  
Ft Ir ◽  
Core Shell Nanoparticles

AbstractIn the present work, an attempt has been made to synthesize the 1,2,3-triazole derivatives resulting from the click reaction, in a mild and green environment using the new copper(II)-coated magnetic core–shell nanoparticles Fe3O4@SiO2 modified by isatoic anhydride. The structure of the catalyst has been determined by XRD, FE-SEM, TGA, VSM, EDS, and FT-IR analyzes. The high efficiency and the ability to be recovered and reused for at least up to 6 consecutive runs are some superior properties of the catalyst.

scholarly journals Magneto-Optical Characteristics of Streptavidin-Coated Fe3O4@Au Core-Shell Nanoparticles for Potential Applications on Biomedical Assays

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Chin-Wei Lin ◽  
Jian-Ming Chen ◽  
You-Jun Lin ◽  
Ling-Wei Chao ◽  
Sin-Yi Wei ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Faraday Effect ◽  
Au Nanoparticles ◽  
Optical Characteristics ◽  
Enzyme Linked Immunosorbent Assay ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Time Resolved ◽  
Biotechnology Research ◽  
Core Shell Nanoparticles

Abstract Recently, gold-coated magnetic nanoparticles have drawn the interest of researchers due to their unique magneto-plasmonic characteristics. Previous research has found that the magneto-optical Faraday effect of gold-coated magnetic nanoparticles can be effectively enhanced because of the surface plasmon resonance of the gold shell. Furthermore, gold-coated magnetic nanoparticles are ideal for biomedical applications because of their high stability and biocompatibility. In this work, we synthesized Fe3O4@Au core-shell nanoparticles and coated streptavidin (STA) on the surface. Streptavidin is a protein which can selectively bind to biotin with a strong affinity. STA is widely used in biotechnology research including enzyme-linked immunosorbent assay (ELISA), time-resolved immunofluorescence (TRFIA), biosensors, and targeted pharmaceuticals. The Faraday magneto-optical characteristics of the biofunctionalized Fe3O4@Au nanoparticles were measured and studied. We showed that the streptavidin-coated Fe3O4@Au nanoparticles still possessed the enhanced magneto-optical Faraday effect. As a result, the possibility of using biofunctionalized Fe3O4@Au nanoparticles for magneto-optical biomedical assays should be explored.

scholarly journals Multifunktionale bakterielle Nanomagnete für Biotechnologie und Medizin

BIOspektrum ◽  
2021 ◽  
Vol 27 (4) ◽  
pp. 442-444
Author(s):  
Frank Mickoleit ◽  
Sabine Rosenfeldt ◽  
Anna S. Schenk ◽  
Dirk Schüler ◽  
René Uebe
Keyword(s):  
Particle Production ◽  
Magnetotactic Bacteria ◽  
Magnetic Core ◽  
High Yield ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Magnetospirillum Gryphiswaldense ◽  
Core Shell Nanoparticles ◽  
Genetic Toolkit ◽  
The Way

AbstractBacterial magnetosomes represent magnetic core-shell nanoparticles biomineralized by magnetotactic bacteria like Magnetospirillum gryphiswaldense. The establishment of fermentation regimes for high-yield particle production, standardized isolation procedures as well as the development of a genetic toolkit for the generation of “tailored” particles might soon pave the way for the application of engineered magnetosomes in the biomedical and biotechnological field.

Identification of aggregates of magnetic nanoparticles in ferrofluids at low concentrations

2003 ◽  
Vol 36 (4) ◽  
pp. 1069-1074 ◽  
Author(s):  
D. Eberbeck ◽  
A. Lange ◽  
M. Hentschel
Keyword(s):  
Magnetic Nanoparticles ◽  
Radial Distance ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Diameter ◽  
X Ray Scattering ◽  
Low Concentrations ◽  
Dilute Suspensions ◽  
Shell Particles ◽  
Core Shell Nanoparticles

Different very dilute suspensions of magnetic nanoparticles (magnetite surrounded by an organic shell) in water (ferrofluids) were investigated using small-angle X-ray scattering. It is shown that the scattering originates not only from noncorrelated core–shell nanoparticles, but also from larger structures. By modelling, these structures can be identified as close-packed clusters consisting of core–shell particles (core diameter ∼10 nm). The analysis of the radial distance distribution function, obtained by Fourier transformation of the scattered intensity, reveals a lower bound of the mean cluster size of about 40 nm. The formation of clusters is persistent, even in very dilute suspensions.

scholarly journals Novel magnetic core-shell nanoparticles for the removal of polychlorinated biphenyls from contaminated water sources

2019 ◽  
Vol 223 ◽  
pp. 68-74 ◽  
Author(s):  
Angela M. Gutierrez ◽  
Rohit Bhandari ◽  
Jiaying Weng ◽  
Arnold Stromberg ◽  
Thomas D. Dziubla ◽  
...  
Keyword(s):  
Polychlorinated Biphenyls ◽  
Magnetic Core ◽  
Water Sources ◽  
Core Shell ◽  
Contaminated Water ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles
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