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Srivastava M, Bisht GS, Srinivasan A. Single-domain Fe 2CoGa 0.5Al 0.5 Heusler alloy nanoparticles with enhanced properties. Phys Chem Chem Phys 2024; 26:2863-2869. [PMID: 38205605 DOI: 10.1039/d3cp05382b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2024]
Abstract
Fine quaternary single-domain Heusler alloy nanoparticles with a composition of Fe2CoGa0.5Al0.5 have been synthesized using a simple template-less chemical route for the first time. Ab initio calculations and standard models have been used to analyze and interpret the experimental findings. The synthesized nanoparticles with an average crystallite size of 42 nm exhibited high saturation magnetization (>5 μB f.u.-1), high effective anisotropy constant (≈8 × 106 erg cc-1), high Curie temperature (>1200 K), low magnetic remanence (<0.2 μB f.u.-1) and low coercive field (<90 Oe), declaring their suitability for fabricating various nanomagnetic devices.
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Affiliation(s)
- Manisha Srivastava
- Department of Physics, Indian Institute of Technology Guwahati, Guwahati - 781039, India.
| | - Gajendra S Bisht
- Department of Physics, Indian Institute of Technology Guwahati, Guwahati - 781039, India.
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Hierarchal polyaniline-folic acid nanostructures act as a platform for electrochemical detection of tumor cells. Anal Biochem 2023; 662:114914. [PMID: 36272452 DOI: 10.1016/j.ab.2022.114914] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 09/12/2022] [Accepted: 09/14/2022] [Indexed: 02/04/2023]
Abstract
The fabrication of electrochemical sensing platforms for cancer monitoring by quantifying circulating tumor cells (CTCs) in blood holds promise for providing a low-cost, rapid, feasible, and safe approach for cancer diagnosis. Here, we isolate cancer cells using CoFe2O4 nanoparticles functionalized with folic acid and chitosan as an inexpensive magnetic nanoprobe. This electrochemical cytosensing platform was realized using polyaniline-folic acid nanohybrids with a three-dimensional hierarchical structure that presents abundant affinity sites toward overexpressed folate bioreceptors on cancer cells, in addition to retaining satisfied conductivity. Furthermore, 3D modeling and simulation of the polyaniline-folic acid structures were conducted to investigate the stable complex between aniline and folate, and the interaction between the polyaniline-folate complex and folate receptor alpha1, a bioreceptor on MCF-7 was revealed for the first time. The limit of detection was calculated to be 4 cells mL-1 with a linear range from 50 to 106 cells mL-1.
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Flood-Garibay JA, Méndez-Rojas MA. Synthesis and characterization of magnetic wrinkled mesoporous silica nanocomposites containing Fe3O4 or CoFe2O4 nanoparticles for potential biomedical applications. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.126236] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Arteaga-Cardona F, Estévez JO, Méndez-Rojas MA, Hidalgo-Tobón S, Dies-Suarez P, Silva-González NR, Gracia Y Jiménez JM, Cherr GN, Salazar-Kuri U. Fabrication of a multifunctional magnetic-fluorescent material for medical applications. Dalton Trans 2020; 49:4376-4389. [PMID: 32167517 DOI: 10.1039/c9dt04823e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Multifunctional biocompatible materials have evoked considerable interest in the field of medical applications. Here we report the thermal decomposition preparation of homogeneous fluorescent-magnetic particles with a composite structure containing CoFe2O4 nanoparticles as nucleation seeds for fluorescent Gd2-xO3:Eux. The composite exhibited a wide range of fluorescence transitions in the whole visible spectrum, displaying 18 different emission peaks when excited at a 250 nm wavelength. Moreover, at low temperature the peaks of the composite were wider than the peaks of the fluorescent material, which may be attributed to a set of new energy levels due to a combination of Stark splitting with the magnetic field of CoFe2O4. Because this material is intended to be used for biomedical applications, the potential toxicity of the composite was tested using an invertebrate hemocyte cell model. The cells showed slight morphological and biochemical changes upon exposure to the composite; however, there was no increase in cell death at concentrations of up to 40 ppm. In addition, the material could be tracked by its fluorescence inside the cells, when excited at a more bio-friendly and less energetic wavelength of 405 nm. Furthermore, MRI showed T1 and T2 dual contrast with relaxivity values in the range of most reported materials.
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Affiliation(s)
- Fernando Arteaga-Cardona
- Instituto de Física, Benemérita Universidad Autónoma de Puebla, Apdo. Postal J-48, Puebla, Pue. 72570, Mexico.
| | - J Octavio Estévez
- Departamento de Materia Condensada/Instituto de Física UNAM, Circuito de la Investigación Científica Ciudad Universitaria, C.P. 04510, Mexico
| | - Miguel A Méndez-Rojas
- Departamento de Ciencias Químico-Biológicas, Universidad de las Américas Puebla, ExHda. Sta. Catarina Mártir s/n, San Andrés Cholula, 72810, Puebla, Mexico
| | - Silvia Hidalgo-Tobón
- Departamento de Física, Universidad Autónoma Metropolitana, Avenida San Rafael Atlixco 186 Iztapalapa, México City, Mexico and Departamento de Imagenología, Hospital Infantil de México Federico Gómez, Dr. Márquez, Col. Doctores, México City, Mexico
| | - Pilar Dies-Suarez
- Departamento de Imagenología, Hospital Infantil de México Federico Gómez, Dr. Márquez, Col. Doctores, México City, Mexico
| | - N Rutilo Silva-González
- Instituto de Física, Benemérita Universidad Autónoma de Puebla, Apdo. Postal J-48, Puebla, Pue. 72570, Mexico.
| | | | - Gary N Cherr
- Bodega Marine Laboratory, University of California-Davis, Bodega Bay, California, USA and Department of Environmental Toxicology and Nutrition, University of California-Davis, Davis, California, USA
| | - Ulises Salazar-Kuri
- Instituto de Física, Benemérita Universidad Autónoma de Puebla, Apdo. Postal J-48, Puebla, Pue. 72570, Mexico.
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