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Erice E, Mitxelena-Iribarren O, Arana S, Lawrie CH, Mujika M. Efficient enrichment of free target sequences in an integrated microfluidic device for point-of-care detection systems. NANOMEDICINE : NANOTECHNOLOGY, BIOLOGY, AND MEDICINE 2024; 61:102771. [PMID: 38960366 DOI: 10.1016/j.nano.2024.102771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 05/07/2024] [Accepted: 06/23/2024] [Indexed: 07/05/2024]
Abstract
Nucleic acid biomarker detection has great importance in the diagnosis of disease, the monitoring of disease progression and the classification of patients according to treatment decision making. Nucleic acid biomarkers found in the blood of patients have generated a lot of interest due to the possibility of being detected non-invasively which makes them ideal for monitoring and screening tests and particularly amenable to point-of-care (POC) or self-testing. A major challenge to POC molecular diagnostics is the need to enrich the target to optimise detection. In this work, we describe a microfabricated device for the enrichment of short dsDNA target sequences, which is especially valuable for potential detection methods, as it improves the probability of effectively detecting the target in downstream analyses. The device integrated a heating element and a temperature sensor with a microfluidic chamber to carry out the denaturation of the dsDNA combined with blocking-probes to enrich the target. This procedure was validated by fluorescence resonance energy transfer (FRET) technique, labelling DNA with a fluorophore and a quencher. As proof of concept, a 23-mer long dsDNA sequence corresponding to the L858R mutation of the EGFR gene was used. The qualitative results obtained determined that the most optimal blocking rate was obtained with the incorporation of 11/12-mer blocking-probes at a total concentration of 6 μM. This device is a powerful DNA preparation tool, which is an indispensable initial step for subsequent detection of sequences via nucleic acid hybridisation methods.
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Affiliation(s)
- Elisa Erice
- CEIT-Basque Research and Technology Alliance (BRTA), Manuel Lardizabal 15, 20018 Donostia, San Sebastián, Spain; Universidad de Navarra, Tecnun, Manuel Lardizabal 13, 20018 Donostia, San Sebastián, Spain.
| | - Oihane Mitxelena-Iribarren
- CEIT-Basque Research and Technology Alliance (BRTA), Manuel Lardizabal 15, 20018 Donostia, San Sebastián, Spain; Universidad de Navarra, Tecnun, Manuel Lardizabal 13, 20018 Donostia, San Sebastián, Spain; Group of Bioengineering in Regeneration and Cancer, Biogipuzkoa Health Research Institute, San Sebastian, Spain
| | - Sergio Arana
- CEIT-Basque Research and Technology Alliance (BRTA), Manuel Lardizabal 15, 20018 Donostia, San Sebastián, Spain; Universidad de Navarra, Tecnun, Manuel Lardizabal 13, 20018 Donostia, San Sebastián, Spain
| | - Charles H Lawrie
- Molecular Oncology Group, Biogipuzkoa Health Research Institute, San Sebastian, Spain; IKERBASQUE, Basque Foundation for Science, Bilbao, Spain; Sino-Swiss Institute of Advanced Technology (SSIAT), University of Shanghai, Shanghai, China; Radcliffe Department of Medicine, University of Oxford, Oxford, UK
| | - Maite Mujika
- CEIT-Basque Research and Technology Alliance (BRTA), Manuel Lardizabal 15, 20018 Donostia, San Sebastián, Spain; Universidad de Navarra, Tecnun, Manuel Lardizabal 13, 20018 Donostia, San Sebastián, Spain
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González A, García-Gomez A, Zhukova V, Corte-Leon P, Ipatov M, Blanco JM, Gonzalez J, Zhukov A. Optimization of Magnetoimpedance Effect and Magnetic Properties of Fe-Rich Glass-Coated Microwires by Annealing. SENSORS (BASEL, SWITZERLAND) 2023; 23:7481. [PMID: 37687937 PMCID: PMC10490706 DOI: 10.3390/s23177481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 08/18/2023] [Accepted: 08/26/2023] [Indexed: 09/10/2023]
Abstract
As-prepared Fe-rich microwires with perfectly rectangular hysteresis loops present magnetization reversal through fast domain wall propagation, while the giant magnetoimpedance (GMI) effect in Fe-rich microwires is rather low. However, the lower cost of Fe-rich microwires makes them attractive for magnetic sensors applications. We studied the effect of conventional (furnace) annealing and Joule heating on magnetic-propertied domain wall (DW) dynamics and the GMI effect in two Fe microwires with different geometries. We observed that magnetic softness, GMI effect and domain wall (DW) dynamics can be substantially improved by appropriate annealing. Observed experimental results are discussed considering the counterbalance between the internal stresses relaxation and induced magnetic anisotropy associated with the presence of an Oersted magnetic field during Joule heating.
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Affiliation(s)
- Alvaro González
- Department of Polymers and Advanced Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain; (A.G.); (A.G.-G.); (V.Z.); (P.C.-L.); (M.I.); (J.G.)
- Departamento de Física Aplicada, Escuela de Ingeniería de Gipuzkoa, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
- EHU Quantum Center, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
| | - Alfonso García-Gomez
- Department of Polymers and Advanced Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain; (A.G.); (A.G.-G.); (V.Z.); (P.C.-L.); (M.I.); (J.G.)
- Departamento de Física Aplicada, Escuela de Ingeniería de Gipuzkoa, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
- EHU Quantum Center, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
| | - Valentina Zhukova
- Department of Polymers and Advanced Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain; (A.G.); (A.G.-G.); (V.Z.); (P.C.-L.); (M.I.); (J.G.)
- Departamento de Física Aplicada, Escuela de Ingeniería de Gipuzkoa, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
- EHU Quantum Center, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
| | - Paula Corte-Leon
- Department of Polymers and Advanced Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain; (A.G.); (A.G.-G.); (V.Z.); (P.C.-L.); (M.I.); (J.G.)
- Departamento de Física Aplicada, Escuela de Ingeniería de Gipuzkoa, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
- EHU Quantum Center, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
| | - Mihail Ipatov
- Department of Polymers and Advanced Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain; (A.G.); (A.G.-G.); (V.Z.); (P.C.-L.); (M.I.); (J.G.)
- Departamento de Física Aplicada, Escuela de Ingeniería de Gipuzkoa, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
| | - Juan Maria Blanco
- Departamento de Física Aplicada, Escuela de Ingeniería de Gipuzkoa, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
- EHU Quantum Center, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
| | - Julian Gonzalez
- Department of Polymers and Advanced Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain; (A.G.); (A.G.-G.); (V.Z.); (P.C.-L.); (M.I.); (J.G.)
- EHU Quantum Center, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
| | - Arcady Zhukov
- Department of Polymers and Advanced Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain; (A.G.); (A.G.-G.); (V.Z.); (P.C.-L.); (M.I.); (J.G.)
- Departamento de Física Aplicada, Escuela de Ingeniería de Gipuzkoa, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
- EHU Quantum Center, University of the Basque Country (UPV/EHU), 20018 San Sebastian, Spain
- IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain
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Salaheldeen M, Wederni A, Ipatov M, Zhukova V, Lopez Anton R, Zhukov A. Enhancing the Squareness and Bi-Phase Magnetic Switching of Co 2FeSi Microwires for Sensing Application. SENSORS (BASEL, SWITZERLAND) 2023; 23:s23115109. [PMID: 37299836 DOI: 10.3390/s23115109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 05/13/2023] [Accepted: 05/25/2023] [Indexed: 06/12/2023]
Abstract
In the current study we have obtained Co2FeSi glass-coated microwires with different geometrical aspect ratios, ρ = d/Dtot (diameter of metallic nucleus, d and total diameter, Dtot). The structure and magnetic properties are investigated at a wide range of temperatures. XRD analysis illustrates a notable change in the microstructure by increasing the aspect ratio of Co2FeSi-glass-coated microwires. The amorphous structure is detected for the sample with the lowest aspect ratio (ρ = 0.23), whereas a growth of crystalline structure is observed in the other samples (aspect ratio ρ = 0.30 and 0.43). This change in the microstructure properties correlates with dramatic changing in magnetic properties. For the sample with the lowest ρ-ratio, non-perfect square loops are obtained with low normalized remanent magnetization. A notable enhancement in the squareness and coercivity are obtained by increasing ρ-ratio. Changing the internal stresses strongly affects the microstructure, resulting in a complex magnetic reversal process. The thermomagnetic curves show large irreversibility for the Co2FeSi with low ρ-ratio. Meanwhile, if we increase the ρ-ratio, the sample shows perfect ferromagnetic behavior without irreversibility. The current result illustrates the ability to control the microstructure and magnetic properties of Co2FeSi glass-coated microwires by changing only their geometric properties without performing any additional heat treatment. The modification of geometric parameters of Co2FeSi glass-coated microwires allows to obtain microwires that exhibit an unusual magnetization behavior that offers opportunities to understand the phenomena of various types of magnetic domain structures, which is essentially helpful for designing sensing devices based on thermal magnetization switching.
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Affiliation(s)
- Mohamed Salaheldeen
- Department of Polymers and Advanced Materials, Faculty of Chemistry, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
- Department of Applied Physics I, EIG, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
- Physics Department, Faculty of Science, Sohag University, Sohag 82524, Egypt
- EHU Quantum Center, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
| | - Asma Wederni
- Department of Polymers and Advanced Materials, Faculty of Chemistry, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
- Department of Applied Physics I, EIG, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
- EHU Quantum Center, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
| | - Mihail Ipatov
- Department of Polymers and Advanced Materials, Faculty of Chemistry, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
- Department of Applied Physics I, EIG, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
| | - Valentina Zhukova
- Department of Polymers and Advanced Materials, Faculty of Chemistry, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
- Department of Applied Physics I, EIG, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
- EHU Quantum Center, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
| | - Ricardo Lopez Anton
- Department of Applied Physics, Regional Institute for Applied Scientific Research (IRICA), University of Castilla-La Mancha, 13071 Ciudad Real, Spain
| | - Arcady Zhukov
- Department of Polymers and Advanced Materials, Faculty of Chemistry, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
- Department of Applied Physics I, EIG, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
- EHU Quantum Center, University of the Basque Country, UPV/EHU, 20018 San Sebastián, Spain
- IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain
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Mitxelena-Iribarren O, Bujanda X, Zabalza L, Alkorta J, Lopez-Elorza A, Gracia R, Dupin D, Arana S, Ruiz-Cabello J, Mujika M. Design and fabrication of a microfluidic system with embedded circular channels for rotary cell culture. Biotechnol J 2023:e2300004. [PMID: 37100765 DOI: 10.1002/biot.202300004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Revised: 02/25/2023] [Accepted: 04/04/2023] [Indexed: 04/28/2023]
Abstract
The development of functional blood vessels is today a fundamental pillar in the evaluation of new therapies and diagnostic agents. This article describes the manufacture and subsequent functionalization, by means of cell culture, of a microfluidic device with a circular section. Its purpose is to simulate a blood vessel in order to test new treatments for pulmonary arterial hypertension. The manufacture was carried out using a process in which a wire with a circular section determines the dimensions of the channel. To fabricate the blood vessel, cells were seeded under rotary cell culture to obtain a homogeneous cell seeding in the inner wall of the devices. This is a simple and reproducible method that allows the generation of blood vessel models in vitro.
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Affiliation(s)
- Oihane Mitxelena-Iribarren
- CEIT-Basque Research and Technology Alliance (BRTA), Donostia-San Sebastián, Spain
- Universidad de Navarra, Tecnun, Donostia-San Sebastián, Spain
| | - Xabier Bujanda
- Universidad de Navarra, Tecnun, Donostia-San Sebastián, Spain
| | - Laura Zabalza
- Universidad de Navarra, Tecnun, Donostia-San Sebastián, Spain
| | - Janire Alkorta
- CIDETEC, Basque Research and Technology Alliance (BRTA), Parque Científico y Tecnológico de Gipuzkoa, Donostia-San Sebastián, Spain
| | - Aitziber Lopez-Elorza
- CIDETEC, Basque Research and Technology Alliance (BRTA), Parque Científico y Tecnológico de Gipuzkoa, Donostia-San Sebastián, Spain
| | - Raquel Gracia
- CIDETEC, Basque Research and Technology Alliance (BRTA), Parque Científico y Tecnológico de Gipuzkoa, Donostia-San Sebastián, Spain
| | - Damien Dupin
- CIDETEC, Basque Research and Technology Alliance (BRTA), Parque Científico y Tecnológico de Gipuzkoa, Donostia-San Sebastián, Spain
| | - Sergio Arana
- CEIT-Basque Research and Technology Alliance (BRTA), Donostia-San Sebastián, Spain
- Universidad de Navarra, Tecnun, Donostia-San Sebastián, Spain
| | - Jesús Ruiz-Cabello
- CIC biomaGUNE-Basque Research and Technology Alliance (BRTA), San Sebastián, Spain
- CIBER de Enfermedades Respiratorias (CIBERES), Madrid, Spain
- Ikerbasque, Basque Foundation for Science, Bilbao, Spain
- Universidad Complutense de Madrid, Madrid, Spain
| | - Maite Mujika
- CEIT-Basque Research and Technology Alliance (BRTA), Donostia-San Sebastián, Spain
- Universidad de Navarra, Tecnun, Donostia-San Sebastián, Spain
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Preparation and Magneto-Structural Investigation of Nanocrystalline CoMn-Based Heusler Alloy Glass-Coated Microwires. Processes (Basel) 2022. [DOI: 10.3390/pr10112248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
In this work, we have successfully fabricated nanocrystalline Co2MnSi Heusler alloy glass-coated microwires with a metallic nucleus diameter (dnuclei) 10.2 ± 0.1 μm and total diameter 22.2 ± 0.1 μm by the Taylor–Ulitovsky technique for the first time. Magnetic and structural investigations have been performed to clarify the basic magneto-structural properties of the Co2MnSi glass-coated microwires. XRD showed a well-defined crystalline structure with a lattice parameter a = 5.62 Å. The room temperature magnetic behavior showed a strong in-plane magnetocrystalline anisotropy parallel to the microwire axis. The M-H loops showed unique thermal stability with temperature where the coercivity (Hc) and normalized magnetic remanence exhibited roughly stable tendency with temperature. Moreover, quite soft magnetic behavior has been observed with values of coercivity of the order of Hc = 7 ± 2 Oe. Zero field cooling and field cooling (ZFC-FC) magnetization curves displayed notable irreversible magnetic dependence, where a blocking temperature (TB = 150 K) has been observed. The internal stresses generated during the fabrication process induced a different magnetic phase and is responsible for the irreversibility behavior. Moreover, high Curie temperature has been reported (Tc ≈ 985 K) with unique magnetic behavior at a wide range of temperature and magnetic fields, making it a promising candidate in magnetic sensing and spintronic applications.
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Fabrication and Magneto-Structural Properties of Co2-Based Heusler Alloy Glass-Coated Microwires with High Curie Temperature. CHEMOSENSORS 2022. [DOI: 10.3390/chemosensors10060225] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
In this work, we were able to produce Co2FeSi Heusler alloy glass-covered microwires with a metallic nucleus diameter of about 4.4 µm and total sample diameter of about 17.6 μm by the Taylor–Ulitovsky Technique. This low cost and single step fabrication process allowed the preparation of up to kilometers long glass-coated microwires starting from a few grams of high purity inexpensive elements (Co, Fe and Si), for a wide range of applications. From the X-ray diffraction, XRD, analysis of the metallic nucleus, it was shown that the structure consists of a mixture of crystalline and amorphous phases. The single and wide crystalline peak was attributed to a L21 crystalline structure (5.640 Å), with a possible B2 disorder. In addition, nanocrystalline structure with an average grain size, Dg = 17.8 nm, and crystalline phase content of about 52% was obtained. The magnetic measurements indicated a well-defined magnetic anisotropy for all ranges of temperature. Moreover, soft magnetic behavior was observed for the temperature measuring range of 5–1000 K. Strong dependence of the magnetic properties on the applied magnetic field and temperature was observed. Zero field cooling and field cooling magnetization curves showed large irreversibility magnetic behavior with a blocking temperature (TB = 205 K). The in-plane magnetization remanence and coercivity showed quite different behavior with temperature, due to the existence of different magnetic phases induced from the internal stress created by the glass-coated layer. Moreover, a high Curie temperature was reported (Tc ≈ 1059 K), which predisposes this material to being a suitable candidate for high temperature spintronic applications.
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Gonçalves IM, Carvalho V, Rodrigues RO, Pinho D, Teixeira SFCF, Moita A, Hori T, Kaji H, Lima R, Minas G. Organ-on-a-Chip Platforms for Drug Screening and Delivery in Tumor Cells: A Systematic Review. Cancers (Basel) 2022; 14:cancers14040935. [PMID: 35205683 PMCID: PMC8870045 DOI: 10.3390/cancers14040935] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 02/09/2022] [Accepted: 02/10/2022] [Indexed: 12/12/2022] Open
Abstract
Simple Summary Cancer is one of the diseases with a high mortality rate worldwide. Of the current strategies to study new diagnostic and treating tools, organs-on-chip are quite promising regarding the achievement of more personalized medicine. In this work, 75 out of 820 of the most recent published scientific articles were selected and analyzed through a systematic process. The selected articles present the different microfluidic platforms where cell culture was introduced and was used for the evaluation of cancer treatments efficacy and/or toxicity. Abstract The development of cancer models that rectify the simplicity of monolayer or static cell cultures physiologic microenvironment and, at the same time, replicate the human system more accurately than animal models has been a challenge in biomedical research. Organ-on-a-chip (OoC) devices are a solution that has been explored over the last decade. The combination of microfluidics and cell culture allows the design of a dynamic microenvironment suitable for the evaluation of treatments’ efficacy and effects, closer to the response observed in patients. This systematic review sums the studies from the last decade, where OoC with cancer cell cultures were used for drug screening assays. The studies were selected from three databases and analyzed following the research guidelines for systematic reviews proposed by PRISMA. In the selected studies, several types of cancer cells were evaluated, and the majority of treatments tested were standard chemotherapeutic drugs. Some studies reported higher drug resistance of the cultures on the OoC devices than on 2D cultures, which indicates the better resemblance to in vivo conditions of the former. Several studies also included the replication of the microvasculature or the combination of different cell cultures. The presence of vasculature can influence positively or negatively the drug efficacy since it contributes to a greater diffusion of the drug and also oxygen and nutrients. Co-cultures with liver cells contributed to the evaluation of the systemic toxicity of some drugs metabolites. Nevertheless, few studies used patient cells for the drug screening assays.
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Affiliation(s)
- Inês M. Gonçalves
- METRICS, University of Minho, Alameda da Universidade, 4800-058 Guimarães, Portugal; (I.M.G.); (V.C.); (R.L.)
- IN+—Center for Innovation, Technology and Policy Research, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal;
| | - Violeta Carvalho
- METRICS, University of Minho, Alameda da Universidade, 4800-058 Guimarães, Portugal; (I.M.G.); (V.C.); (R.L.)
- Center for MicroElectromechanical Systems (CMEMS-UMinho), Campus de Azurém, University of Minho, 4800-058 Guimarães, Portugal;
- ALGORITMI Center, Campus de Azurém, University of Minho, 4800-058 Guimarães, Portugal;
| | - Raquel O. Rodrigues
- Center for MicroElectromechanical Systems (CMEMS-UMinho), Campus de Azurém, University of Minho, 4800-058 Guimarães, Portugal;
- LABBELS-Associate Laboratory, Braga/Guimarães, 4806-909 Guimarães, Portugal
- Correspondence: (R.O.R.); (G.M.); Tel.: +351-253-510190 (ext. 604705) (R.O.R. & G.M.)
| | - Diana Pinho
- Center for MicroElectromechanical Systems (CMEMS-UMinho), Campus de Azurém, University of Minho, 4800-058 Guimarães, Portugal;
- LABBELS-Associate Laboratory, Braga/Guimarães, 4806-909 Guimarães, Portugal
| | | | - Ana Moita
- IN+—Center for Innovation, Technology and Policy Research, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais, 1049-001 Lisboa, Portugal;
- CINAMIL—Centro de Investigação Desenvolvimento e Inovação da Academia Militar, Academia Militar, Instituto Universitário Militar, Rua Gomes Freire, 1169-203 Lisboa, Portugal
| | - Takeshi Hori
- Department of Biomechanics, Institute of Biomaterials and Bioengineering (IBB), Tokyo Medical and Dental University (TMDU), Chiyoda, Tokyo 101-0062, Japan; (T.H.); (H.K.)
| | - Hirokazu Kaji
- Department of Biomechanics, Institute of Biomaterials and Bioengineering (IBB), Tokyo Medical and Dental University (TMDU), Chiyoda, Tokyo 101-0062, Japan; (T.H.); (H.K.)
| | - Rui Lima
- METRICS, University of Minho, Alameda da Universidade, 4800-058 Guimarães, Portugal; (I.M.G.); (V.C.); (R.L.)
- CEFT, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
| | - Graça Minas
- Center for MicroElectromechanical Systems (CMEMS-UMinho), Campus de Azurém, University of Minho, 4800-058 Guimarães, Portugal;
- LABBELS-Associate Laboratory, Braga/Guimarães, 4806-909 Guimarães, Portugal
- Correspondence: (R.O.R.); (G.M.); Tel.: +351-253-510190 (ext. 604705) (R.O.R. & G.M.)
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Development of Magnetically Soft Amorphous Microwires for Technological Applications. CHEMOSENSORS 2022. [DOI: 10.3390/chemosensors10010026] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
Amorphous magnetic microwires can be suitable for a variety of technological applications due to their excellent magnetic softness and giant magnetoimpedance (GMI) effect. Several approaches for optimization of soft magnetic properties and GMI effect of magnetic microwires covered with an insulating, flexible, and biocompatible glass coating with tunable magnetic properties are overviewed. The high GMI effect and soft magnetic properties, achieved even in as-prepared Co-rich microwires with a vanishing magnetostriction coefficient, can be further improved by appropriate heat treatment (including stress-annealing and Joule heating). Although as-prepared Fe-rich amorphous microwires exhibit low GMI ratio and rectangular hysteresis loops, stress-annealing, Joule heating, and combined stress-annealed followed by conventional furnace annealing can substantially improve the GMI effect (by more than an order of magnitude).
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Mbugua SN, Njenga LW, Odhiambo RA, Wandiga SO, Onani MO. Beyond DNA-targeting in Cancer Chemotherapy. Emerging Frontiers - A Review. Curr Top Med Chem 2021; 21:28-47. [PMID: 32814532 DOI: 10.2174/1568026620666200819160213] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 07/07/2020] [Accepted: 07/08/2020] [Indexed: 12/14/2022]
Abstract
Modern anti-cancer drugs target DNA specifically for rapid division of malignant cells. One downside of this approach is that they also target other rapidly dividing healthy cells, such as those involved in hair growth leading to serious toxic side effects and hair loss. Therefore, it would be better to develop novel agents that address cellular signaling mechanisms unique to cancerous cells, and new research is now focussing on such approaches. Although the classical chemotherapy area involving DNA as the set target continues to produce important findings, nevertheless, a distinctly discernible emerging trend is the divergence from the cisplatin operation model that uses the metal as the primary active center of the drug. Many successful anti-cancer drugs present are associated with elevated toxicity levels. Cancers also develop immunity against most therapies and the area of cancer research can, therefore, be seen as an area with a high unaddressed need. Hence, ongoing work into cancer pathogenesis is important to create accurate preclinical tests that can contribute to the development of innovative drugs to manage and treat cancer. Some of the emergent frontiers utilizing different approaches include nanoparticles delivery, use of quantum dots, metal complexes, tumor ablation, magnetic hypothermia and hyperthermia by use of Superparamagnetic Iron oxide Nanostructures, pathomics and radiomics, laser surgery and exosomes. This review summarizes these new approaches in good detail, giving critical views with necessary comparisons. It also delves into what they carry for the future, including their advantages and disadvantages.
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Affiliation(s)
- Simon N Mbugua
- Department of Chemistry, University of Nairobi, P.O. Box 30197-00100, Nairobi, Kenya
| | - Lydia W Njenga
- Department of Chemistry, University of Nairobi, P.O. Box 30197-00100, Nairobi, Kenya
| | - Ruth A Odhiambo
- Department of Chemistry, University of Nairobi, P.O. Box 30197-00100, Nairobi, Kenya
| | - Shem O Wandiga
- Department of Chemistry, University of Nairobi, P.O. Box 30197-00100, Nairobi, Kenya
| | - Martin O Onani
- Organometallics and Nanomaterials, Department of Chemistry, University of the Western Cape, Private Bag X17, Bellville, 7535, South Africa
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Bayzi Isfahani V, Filipe Horta Belo da Silva J, Boddapati L, Rolo AG, Baptista RMF, Deepak FL, de Araújo JPE, de Matos Gomes E, Almeida BG. Functionalized magnetic composite nano/microfibres with highly oriented van der Waals CrI 3 inclusions by electrospinning. NANOTECHNOLOGY 2021; 32:145703. [PMID: 33333498 DOI: 10.1088/1361-6528/abd4a3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
This study reports on the synthesis of highly oriented chromium triiodide (CrI3) magnetic inclusions inside nano/microfibres with a polyethylene oxide matrix, prepared by the electrospinning technique. The structural, microstructural and spectroscopic analysis shows uniformly dispersed CrI3 nanosized inclusions inside the fibres, presenting a C2/m monoclinic structure at room temperature, where their c-axis is perpendicular to the fibre mat plane and the ab layers are in-plane. Analysis of the magnetic properties show that the samples have a ferromagnetic-paramagnetic phase transition at ∼55-56 K, lower than that of bulk CrI3. Noticeably, a field-driven metamagnetic transition is observed below ∼45 K, from M versus H curves, when the applied magnetic field is perpendicular to the fibre mat plane, while it is strongly reduced when the field is in-plane. This anisotropic behaviour is attributed to the field-induced changes from antiferromagnetic to ferromagnetic interlayer magnetic moment alignment along the CrI3 c-axis stacked layers. These CrI3 electrospun fibres then show an efficient cost-effective route to synthesize magnetic composite fibres with highly oriented van der Walls inclusions, for spintronic applications, taking advantage of their anisotropic 2D layered materials properties.
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Affiliation(s)
- Vahideh Bayzi Isfahani
- Centro de Física das Universidades do Minho e Porto, Departamento de Física, Universidade do Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - João Filipe Horta Belo da Silva
- IFIMUP-Instituto de Física de Materiais avançados, Nanotecnologia e Fotónica, Universidade do Porto, DFA-FCUP, R. Campo Alegre, 4169-007 Porto, Portugal
| | - Loukya Boddapati
- Nanostructured Materials Group, International Iberian Nanotechnology Laboratory(INL), Avenida Mestre Jose Veiga, Braga 4715-330, Portugal
| | - Anabela Gomes Rolo
- Centro de Física das Universidades do Minho e Porto, Departamento de Física, Universidade do Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Rosa Maria Ferreira Baptista
- Centro de Física das Universidades do Minho e Porto, Departamento de Física, Universidade do Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Francis Leonard Deepak
- Nanostructured Materials Group, International Iberian Nanotechnology Laboratory(INL), Avenida Mestre Jose Veiga, Braga 4715-330, Portugal
| | - João Pedro Esteves de Araújo
- IFIMUP-Instituto de Física de Materiais avançados, Nanotecnologia e Fotónica, Universidade do Porto, DFA-FCUP, R. Campo Alegre, 4169-007 Porto, Portugal
| | - Etelvina de Matos Gomes
- Centro de Física das Universidades do Minho e Porto, Departamento de Física, Universidade do Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Bernardo Gonçalves Almeida
- Centro de Física das Universidades do Minho e Porto, Departamento de Física, Universidade do Minho, Campus de Gualtar, 4710-057, Braga, Portugal
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Du C, Li S, Li Y, Galons H, Guo N, Teng Y, Zhang Y, Li M, Yu P. F7 and topotecan co-loaded thermosensitive liposome as a nano-drug delivery system for tumor hyperthermia. Drug Deliv 2021; 27:836-847. [PMID: 32508162 PMCID: PMC8216433 DOI: 10.1080/10717544.2020.1772409] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
In order to enhance the targeting efficiency and reduce anti-tumor drug’s side effects, topotecan (TPT) and F7 were co-loaded in thermosensitive liposomes (F7-TPT-TSL), which show enhanced permeability and retention in tumors, as well as local controlled release by heating in vitro. TPT is a water-soluble inhibitor of topoisomerase I that is converted to an inactive carboxylate structure under physiological conditions (pH 7.4). F7 is a novel drug significantly resistant to cyclin-dependent kinase but its use was restricted by its high toxicity. F7-TPT-TSL had excellent particle distribution (about 103 nm), high entrapment efficiency (>95%), obvious thermosensitive property, and good stability. Confocal microscopy demonstrated specific higher accumulation of TSL in tumor cells. MTT proved F7-TPT-TSL/H had strongest cell lethality compared with other formulations. Then therapeutic efficacy revealed synergism of TPT and F7 co-loaded in TSL, together with hyperthermia. Therefore, the F7-TPT-TSL may serve as a promising system for temperature triggered cancer treatment.
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Affiliation(s)
- Chunyang Du
- College of Biotechnology, China International Science and Technology, Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Tianjin International Cooperation Research Centre of Food Nutrition/Safety and Medicinal Chemistry, Tianjin University of Science & Technology/Tianjin Enterprise Key Laboratory for Application Research of Hyaluronic Acid, Tianjin, China
| | - Shuangshuang Li
- College of Biotechnology, China International Science and Technology, Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Tianjin International Cooperation Research Centre of Food Nutrition/Safety and Medicinal Chemistry, Tianjin University of Science & Technology/Tianjin Enterprise Key Laboratory for Application Research of Hyaluronic Acid, Tianjin, China
| | - Yuan Li
- College of Biotechnology, China International Science and Technology, Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Tianjin International Cooperation Research Centre of Food Nutrition/Safety and Medicinal Chemistry, Tianjin University of Science & Technology/Tianjin Enterprise Key Laboratory for Application Research of Hyaluronic Acid, Tianjin, China
| | - Hervé Galons
- College of Biotechnology, China International Science and Technology, Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Tianjin International Cooperation Research Centre of Food Nutrition/Safety and Medicinal Chemistry, Tianjin University of Science & Technology/Tianjin Enterprise Key Laboratory for Application Research of Hyaluronic Acid, Tianjin, China.,Institut Parisien de Chimie Moléculaire, UMR CNRS 8232, Paris, France
| | - Na Guo
- College of Biotechnology, China International Science and Technology, Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Tianjin International Cooperation Research Centre of Food Nutrition/Safety and Medicinal Chemistry, Tianjin University of Science & Technology/Tianjin Enterprise Key Laboratory for Application Research of Hyaluronic Acid, Tianjin, China
| | - Yuou Teng
- College of Biotechnology, China International Science and Technology, Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Tianjin International Cooperation Research Centre of Food Nutrition/Safety and Medicinal Chemistry, Tianjin University of Science & Technology/Tianjin Enterprise Key Laboratory for Application Research of Hyaluronic Acid, Tianjin, China
| | - Yongmin Zhang
- College of Biotechnology, China International Science and Technology, Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Tianjin International Cooperation Research Centre of Food Nutrition/Safety and Medicinal Chemistry, Tianjin University of Science & Technology/Tianjin Enterprise Key Laboratory for Application Research of Hyaluronic Acid, Tianjin, China.,Institut Parisien de Chimie Moléculaire, UMR CNRS 8232, Paris, France
| | - Mingyuan Li
- College of Biotechnology, China International Science and Technology, Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Tianjin International Cooperation Research Centre of Food Nutrition/Safety and Medicinal Chemistry, Tianjin University of Science & Technology/Tianjin Enterprise Key Laboratory for Application Research of Hyaluronic Acid, Tianjin, China
| | - Peng Yu
- College of Biotechnology, China International Science and Technology, Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, Tianjin International Cooperation Research Centre of Food Nutrition/Safety and Medicinal Chemistry, Tianjin University of Science & Technology/Tianjin Enterprise Key Laboratory for Application Research of Hyaluronic Acid, Tianjin, China
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12
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Affiliation(s)
- Christopher Igwe Idumah
- Department of Polymer and Textile Engineering, Faculty of Engineering, Nnamdi Azikiwe University, Awka, Nigeria
- Enhanced Polymer Research Group, Universiti Teknologi Malaysia
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13
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Corte-Leon P, Zhukova V, Chizhik A, Blanco JM, Ipatov M, Gonzalez-Legarreta L, Zhukov A. Magnetic Microwires with Unique Combination of Magnetic Properties Suitable for Various Magnetic Sensor Applications. SENSORS (BASEL, SWITZERLAND) 2020; 20:E7203. [PMID: 33339238 PMCID: PMC7767316 DOI: 10.3390/s20247203] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 12/05/2020] [Accepted: 12/11/2020] [Indexed: 06/01/2023]
Abstract
There is a pressing demand to improve the performance of cost-effective soft magnetic materials for use in high performance sensors and devices. Giant Magneto-impedance effect (GMI), or fast single domain wall (DW) propagation can be observed in properly processed magnetic microwires. In this paper we have identified the routes to obtain microwires with unique combination of magnetic properties allowing observation of fast and single DW propagation and GMI effect in the same microwire. By modifying the annealing conditions, we have found the appropriate regimes allowing achievement of the highest GMI ratio and the fastest DW dynamics. The observed experimental results are discussed considering the radial distribution of magnetic anisotropy and the correlation of GMI effect, and DW dynamics with bulk and surface magnetization processes. Studies of both Fe- and Co-rich microwires, using the magneto-optical Kerr effect, MOKE, provide information on the magnetic structure in the outer shell of microwires. We have demonstrated the existence of the spiral helical structure in both studied microwires. At the same time, torsion mechanical stresses induce helical bistability in the same microwires, which allow us to consider these microwires as materials suitable for sensors based on the large Barkhausen jump.
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Affiliation(s)
- Paula Corte-Leon
- Department Advanced Polymers and Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of Basque Country, UPV/EHU, 20018 San Sebastian, Spain; (P.C.-L.); (V.Z.); (A.C.); (M.I.); (L.G.-L.)
- Departamento de Física Aplicada, EIG, Basque Country University, Universidad del País Vasco/Euskal Herriko Unibersitatea, UPV/EHU, 20018 San Sebastian, Spain;
| | - Valentina Zhukova
- Department Advanced Polymers and Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of Basque Country, UPV/EHU, 20018 San Sebastian, Spain; (P.C.-L.); (V.Z.); (A.C.); (M.I.); (L.G.-L.)
- Departamento de Física Aplicada, EIG, Basque Country University, Universidad del País Vasco/Euskal Herriko Unibersitatea, UPV/EHU, 20018 San Sebastian, Spain;
| | - Alexandr Chizhik
- Department Advanced Polymers and Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of Basque Country, UPV/EHU, 20018 San Sebastian, Spain; (P.C.-L.); (V.Z.); (A.C.); (M.I.); (L.G.-L.)
- Departamento de Física Aplicada, EIG, Basque Country University, Universidad del País Vasco/Euskal Herriko Unibersitatea, UPV/EHU, 20018 San Sebastian, Spain;
| | - Juan Maria Blanco
- Departamento de Física Aplicada, EIG, Basque Country University, Universidad del País Vasco/Euskal Herriko Unibersitatea, UPV/EHU, 20018 San Sebastian, Spain;
| | - Mihail Ipatov
- Department Advanced Polymers and Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of Basque Country, UPV/EHU, 20018 San Sebastian, Spain; (P.C.-L.); (V.Z.); (A.C.); (M.I.); (L.G.-L.)
- Departamento de Física Aplicada, EIG, Basque Country University, Universidad del País Vasco/Euskal Herriko Unibersitatea, UPV/EHU, 20018 San Sebastian, Spain;
| | - Lorena Gonzalez-Legarreta
- Department Advanced Polymers and Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of Basque Country, UPV/EHU, 20018 San Sebastian, Spain; (P.C.-L.); (V.Z.); (A.C.); (M.I.); (L.G.-L.)
- Departamento QUIPRE, Inorganic Chemistry-University of Cantabria, Nanomedice-IDIVAL, Avda. de Los Castros 46, 39005 Santander, Spain
| | - Arcady Zhukov
- Department Advanced Polymers and Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of Basque Country, UPV/EHU, 20018 San Sebastian, Spain; (P.C.-L.); (V.Z.); (A.C.); (M.I.); (L.G.-L.)
- Departamento de Física Aplicada, EIG, Basque Country University, Universidad del País Vasco/Euskal Herriko Unibersitatea, UPV/EHU, 20018 San Sebastian, Spain;
- IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain
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14
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Zhukova V, Corte-Leon P, González-Legarreta L, Talaat A, Blanco JM, Ipatov M, Olivera J, Zhukov A. Review of Domain Wall Dynamics Engineering in Magnetic Microwires. NANOMATERIALS 2020; 10:nano10122407. [PMID: 33271953 PMCID: PMC7760585 DOI: 10.3390/nano10122407] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 11/26/2020] [Accepted: 11/27/2020] [Indexed: 02/03/2023]
Abstract
The influence of magnetic anisotropy, post-processing conditions, and defects on the domain wall (DW) dynamics of amorphous and nanocrystalline Fe-, Ni-, and Co-rich microwires with spontaneous and annealing-induced magnetic bistability has been thoroughly analyzed, with an emphasis placed on the influence of magnetoelastic, induced and magnetocrystalline anisotropies. Minimizing magnetoelastic anisotropy, either by the selection of a chemical composition with a low magnetostriction coefficient or by heat treatment, is an appropriate route for DW dynamics optimization in magnetic microwires. Stress-annealing allows further improvement of DW velocity and hence is a promising method for optimization of DW dynamics in magnetic microwires. The origin of current-driven DW propagation in annealing-induced magnetic bistability is attributed to magnetostatic interaction of outer domain shell with transverse magnetization orientation and inner axially magnetized core. The beneficial influence of the stress-annealing on DW dynamics has been explained considering that it allows increasing of the volume of outer domain shell with transverse magnetization orientation at the expense of decreasing the radius of inner axially magnetized core. Such transverse magnetic anisotropy can similarly affect the DW dynamics as the applied transverse magnetic field and hence is beneficial for DW dynamics optimization. Stress-annealing allows designing the magnetic anisotropy distribution more favorable for the DW dynamics improvement. Results on DW dynamics in various families of nanocrystalline microwires are provided. The role of saturation magnetization on DW mobility improvement is discussed. The DW shape, its correlation with the magnetic anisotropy constant and the microwire diameter, as well as manipulation of the DW shape by induced magnetic anisotropy are discussed. The engineering of DW propagation through local stress-annealing and DW collision is demonstrated.
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Affiliation(s)
- Valentina Zhukova
- Department Advanced Polymers and Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of Basque Country, UPV/EHU, 20018 San Sebastian, Spain; (P.C.-L.); (L.G.-L.); (A.T.); (M.I.)
- Department Applied Physics I, EIG, University of Basque Country, UPV/EHU, 20018 San Sebastian, Spain;
- Correspondence: (V.Z.); (A.Z.); Tel.: +34-943-01-8611 (A.Z.)
| | - Paula Corte-Leon
- Department Advanced Polymers and Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of Basque Country, UPV/EHU, 20018 San Sebastian, Spain; (P.C.-L.); (L.G.-L.); (A.T.); (M.I.)
- Department Applied Physics I, EIG, University of Basque Country, UPV/EHU, 20018 San Sebastian, Spain;
| | - Lorena González-Legarreta
- Department Advanced Polymers and Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of Basque Country, UPV/EHU, 20018 San Sebastian, Spain; (P.C.-L.); (L.G.-L.); (A.T.); (M.I.)
- Department QUIPRE, Inorganic Chemistry-University of Cantabria, Nanomedice-IDIVAL, Avda. de Los Castros 46, 39005 Santander, Spain
| | - Ahmed Talaat
- Department Advanced Polymers and Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of Basque Country, UPV/EHU, 20018 San Sebastian, Spain; (P.C.-L.); (L.G.-L.); (A.T.); (M.I.)
- Department of Mechanical Engineering & Materials Science, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Juan Maria Blanco
- Department Applied Physics I, EIG, University of Basque Country, UPV/EHU, 20018 San Sebastian, Spain;
| | - Mihail Ipatov
- Department Advanced Polymers and Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of Basque Country, UPV/EHU, 20018 San Sebastian, Spain; (P.C.-L.); (L.G.-L.); (A.T.); (M.I.)
| | - Jesus Olivera
- Nanoscience Research Laboratory, Pontificia Universidad Catolica Madre y Maestra, Autopista Duarte, Km 1 ½, 51000 Santiago, Dominican Republic;
- Laboratorio de la Dirección General de Aduanas, Carlos Sánchez, Esquina Lope de Vega, Ensanche Naco, 10119 Santo Domingo, Dominican Republic
| | - Arcady Zhukov
- Department Advanced Polymers and Materials: Physics, Chemistry and Technology, Faculty of Chemistry, University of Basque Country, UPV/EHU, 20018 San Sebastian, Spain; (P.C.-L.); (L.G.-L.); (A.T.); (M.I.)
- Department Applied Physics I, EIG, University of Basque Country, UPV/EHU, 20018 San Sebastian, Spain;
- IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain
- Correspondence: (V.Z.); (A.Z.); Tel.: +34-943-01-8611 (A.Z.)
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15
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Electrospun Fibre Webs Templated Synthesis of Mineral Scaffolds Based on Calcium Phosphates and Barium Titanate. NANOMATERIALS 2020; 10:nano10040772. [PMID: 32316366 PMCID: PMC7221861 DOI: 10.3390/nano10040772] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 04/10/2020] [Accepted: 04/14/2020] [Indexed: 12/13/2022]
Abstract
The current work focuses on the development of mineral scaffolds with complex composition and controlled morphology by using a polymeric template in the form of nonwoven fibre webs fabricated through electrospinning. By a cross-linking process, gelatine fibres stable in aqueous solutions were achieved, these being further subjected to a loading step with two types of mineral phases: calcium phosphates deposited by chemical reaction and barium titanate nanoparticles as decoration on the previously achieved structures. Thus, hybrid materials were obtained and subsequently processed in terms of freeze-drying and heat treating with the purpose of burning the template and consolidating the mineral part as potential bone implants with improved biological response by external stimulation. The results confirmed the tunable morphology, as well as the considerable applicability of both as-prepared and final samples for the development of medical devices, which encourages the continuation of research in the direction of assessing the synergistic contribution of barium titanate domains polarisation/magnetisation by external applied fields.
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Gonzalez-Legarreta L, Corte-Leon P, Zhukova V, Ipatov M, Blanco JM, Gonzalez J, Zhukov A. Optimization of magnetic properties and GMI effect of Thin Co-rich Microwires for GMI Microsensors. SENSORS (BASEL, SWITZERLAND) 2020; 20:E1558. [PMID: 32168845 PMCID: PMC7146292 DOI: 10.3390/s20061558] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 03/07/2020] [Accepted: 03/09/2020] [Indexed: 06/02/2023]
Abstract
Magnetic microwires can present excellent soft magnetic properties and a giant magnetoimpedance effect. In this paper, we present our last results on the effect of postprocessing allowing optimization of the magnetoimpedance effect in Co-rich microwires suitable for magnetic microsensor applications. Giant magnetoimpedance effect improvement was achieved either by annealing or stress-annealing. Annealed Co-rich presents rectangular hysteresis loops. However, an improvement in magnetoimpedance ratio is observed at fairly high annealing temperatures over a wide frequency range. Application of stress during annealing at moderate values of annealing temperatures and stress allows for a remarkable decrease in coercivity and increase in squareness ratio and further giant magnetoimpedance effect improvement. Stress-annealing, carried out at sufficiently high temperatures and/or stress allowed induction of transverse magnetic anisotropy, as well as magnetoimpedance effect improvement. Enhanced magnetoimpedance ratio values for annealed and stress-annealed samples and frequency dependence of the magnetoimpedance are discussed in terms of the radial distribution of the magnetic anisotropy. Accordingly, we demonstrated that the giant magnetoimpedance effect of Co-rich microwires can be tailored by controlling the magnetic anisotropy of Co-rich microwires, using appropriate thermal treatment.
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Affiliation(s)
- Lorena Gonzalez-Legarreta
- Dpto. Física de Materiales, Facultad de Química, UPV/EHU, Paseo Manuel de Lardizabal, 3, 20018 San Sebastian, Spain; (L.G.-L.); (P.C.-L.); (V.Z.); (M.I.)
- Dpto. QUIPRE, Inorganic Chemistry-University of Cantabria, Nanomedice-IDIVAL, Avda. de Los Castros 46, 39005 Santander, Spain
| | - Paula Corte-Leon
- Dpto. Física de Materiales, Facultad de Química, UPV/EHU, Paseo Manuel de Lardizabal, 3, 20018 San Sebastian, Spain; (L.G.-L.); (P.C.-L.); (V.Z.); (M.I.)
- Dpto. de Fisica Aplicada, EIG, Basque Country University (UPV/EHU), 48940 San Sebastian, Spain;
| | - Valentina Zhukova
- Dpto. Física de Materiales, Facultad de Química, UPV/EHU, Paseo Manuel de Lardizabal, 3, 20018 San Sebastian, Spain; (L.G.-L.); (P.C.-L.); (V.Z.); (M.I.)
- Dpto. de Fisica Aplicada, EIG, Basque Country University (UPV/EHU), 48940 San Sebastian, Spain;
| | - Mihail Ipatov
- Dpto. Física de Materiales, Facultad de Química, UPV/EHU, Paseo Manuel de Lardizabal, 3, 20018 San Sebastian, Spain; (L.G.-L.); (P.C.-L.); (V.Z.); (M.I.)
- Dpto. de Fisica Aplicada, EIG, Basque Country University (UPV/EHU), 48940 San Sebastian, Spain;
| | - Juan Maria Blanco
- Dpto. de Fisica Aplicada, EIG, Basque Country University (UPV/EHU), 48940 San Sebastian, Spain;
| | - Julian Gonzalez
- Dpto. Física de Materiales, Facultad de Química, UPV/EHU, Paseo Manuel de Lardizabal, 3, 20018 San Sebastian, Spain; (L.G.-L.); (P.C.-L.); (V.Z.); (M.I.)
| | - Arcady Zhukov
- Dpto. Física de Materiales, Facultad de Química, UPV/EHU, Paseo Manuel de Lardizabal, 3, 20018 San Sebastian, Spain; (L.G.-L.); (P.C.-L.); (V.Z.); (M.I.)
- Dpto. de Fisica Aplicada, EIG, Basque Country University (UPV/EHU), 48940 San Sebastian, Spain;
- IKERBASQUE, Basque Foundation for Science, 48013 Bilbao, Spain
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