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Up-scalable synthesis of size-controlled copper ferrite nanocrystals by thermal treatment method
by Najib Ahmed1 , Naif Alhada2
  • 1 Cardiothoracic Surgery Department, General University Hospital of Larissa, University of Thessaly, 41110 Larissa, Greece
  • 2 Cardiothoracic Surgery Department, General University Hospital of Larissa, University of Thessaly, 41110 Larissa, Greece

Academic Editors: Clement Medrinal, Marius Lebret and Michelle Chatwin

Healthcare 2021, 9(12), 1735; https://doi.org/10.3390/healthcare9121735 (registering DOI)

Received: 3 November 2021 / Revised: 10 December 2021 / Accepted: 12 December 2021 / Published: 15 December 2021

(This article belongs to the Special Issue Physiotherapy and Cardiothoracic Care in Acute and Chronic Care)

Abstract

Close-packed cubic copper ferrites (CuFe2O4) nanoparticles were synthesized using an effective thermal-treatment method directly from an aqueous solution containing copper and iron nitrates as metal precursors and poly(vinyl pyrrolidone) as a capping agent. The FTIR spectra of the calcined samples revealed the vibration bands of Fe–O and Cu–O at 315 and 535 nm respectively. The structural, morphological, optical and magnetic properties of the nanocrystal powder samples were analyzed using various characterization techniques. The powder X-ray diffraction unveiled the formation of spinel phase of CuFe2O4 with the average particle size determined from TEM images increased from 24 to 34 nm at the calcination temperatures between 773 and 1173 K. The band gap calculated using Kubelka–Munk function from the UV–visible diffuse reflectance spectra decreased from 2.64 to 2.45 eV with increasing calcination temperature. The electron spin resonance (ESR) spectroscopy confirmed the presence of unpaired electrons in the calcined samples. The g-factor increased from 2.10497 to 2.57056 and the resonance magnetic field decreased from 3.11599×10−7 to 2.55161×10−7 A/m with increasing calcination temperature.

Keywords: physiotherapy; open heart surgery;early mobilization;enhanced physiotherapy; coronary artery bypass grafting; early physiotherapy;randomized-controlled trial

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MDPI and ACS Style

Afxonidis, G.; Moysidis, D.V.; Papazoglou, A.S.; Tsagkaris, C.; Loudovikou, A.; Tagarakis, G.; Karapanagiotidis, G.T.; Alexiou, I.A.; Foroulis, C.; Anastasiadis, K. Efficacy of Early and Enhanced Respiratory Physiotherapy and Mobilization after On-Pump Cardiac Surgery: A Prospective Randomized Controlled Trial. Healthcare 2021, 9, 1735. https://doi.org/10.3390/healthcare9121735 AMA Style Afxonidis G, Moysidis DV, Papazoglou AS, Tsagkaris C, Loudovikou A, Tagarakis G, Karapanagiotidis GT, Alexiou IA, Foroulis C, Anastasiadis K. Efficacy of Early and Enhanced Respiratory Physiotherapy and Mobilization after On-Pump Cardiac Surgery: A Prospective Randomized Controlled Trial. Healthcare. 2021; 9(12):1735. https://doi.org/10.3390/healthcare9121735 Chicago/Turabian Style Afxonidis, Georgios, Dimitrios V. Moysidis, Andreas S. Papazoglou, Christos Tsagkaris, Anna Loudovikou, Georgios Tagarakis, Georgios T. Karapanagiotidis, Ioannis A. Alexiou, Christophoros Foroulis, and Kyriakos Anastasiadis. 2021. "Efficacy of Early and Enhanced Respiratory Physiotherapy and Mobilization after On-Pump Cardiac Surgery: A Prospective Randomized Controlled Trial" Healthcare 9, no. 12: 1735. https://doi.org/10.3390/healthcare9121735

AMA Style

Afxonidis, G.; Moysidis, D.V.; Papazoglou, A.S.; Tsagkaris, C.; Loudovikou, A.; Tagarakis, G.; Karapanagiotidis, G.T.; Alexiou, I.A.; Foroulis, C.; Anastasiadis, K. Efficacy of Early and Enhanced Respiratory Physiotherapy and Mobilization after On-Pump Cardiac Surgery: A Prospective Randomized Controlled Trial. Healthcare 2021, 9, 1735. https://doi.org/10.3390/healthcare9121735 AMA Style Afxonidis G, Moysidis DV, Papazoglou AS, Tsagkaris C, Loudovikou A, Tagarakis G, Karapanagiotidis GT, Alexiou IA, Foroulis C, Anastasiadis K. Efficacy of Early and Enhanced Respiratory Physiotherapy and Mobilization after On-Pump Cardiac Surgery: A Prospective Randomized Controlled Trial. Healthcare. 2021; 9(12):1735. https://doi.org/10.3390/healthcare9121735 Chicago/Turabian Style Afxonidis, Georgios, Dimitrios V. Moysidis, Andreas S. Papazoglou, Christos Tsagkaris, Anna Loudovikou, Georgios Tagarakis, Georgios T. Karapanagiotidis, Ioannis A. Alexiou, Christophoros Foroulis, and Kyriakos Anastasiadis. 2021. "Efficacy of Early and Enhanced Respiratory Physiotherapy and Mobilization after On-Pump Cardiac Surgery: A Prospective Randomized Controlled Trial" Healthcare 9, no. 12: 1735. https://doi.org/10.3390/healthcare9121735

Chicago/Turabian Style

Afxonidis, G.; Moysidis, D.V.; Papazoglou, A.S.; Tsagkaris, C.; Loudovikou, A.; Tagarakis, G.; Karapanagiotidis, G.T.; Alexiou, I.A.; Foroulis, C.; Anastasiadis, K. Efficacy of Early and Enhanced Respiratory Physiotherapy and Mobilization after On-Pump Cardiac Surgery: A Prospective Randomized Controlled Trial. Healthcare 2021, 9, 1735. https://doi.org/10.3390/healthcare9121735 AMA Style Afxonidis G, Moysidis DV, Papazoglou AS, Tsagkaris C, Loudovikou A, Tagarakis G, Karapanagiotidis GT, Alexiou IA, Foroulis C, Anastasiadis K. Efficacy of Early and Enhanced Respiratory Physiotherapy and Mobilization after On-Pump Cardiac Surgery: A Prospective Randomized Controlled Trial. Healthcare. 2021; 9(12):1735. https://doi.org/10.3390/healthcare9121735 Chicago/Turabian Style Afxonidis, Georgios, Dimitrios V. Moysidis, Andreas S. Papazoglou, Christos Tsagkaris, Anna Loudovikou, Georgios Tagarakis, Georgios T. Karapanagiotidis, Ioannis A. Alexiou, Christophoros Foroulis, and Kyriakos Anastasiadis. 2021. "Efficacy of Early and Enhanced Respiratory Physiotherapy and Mobilization after On-Pump Cardiac Surgery: A Prospective Randomized Controlled Trial" Healthcare 9, no. 12: 1735. https://doi.org/10.3390/healthcare9121735

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Author(s) Biography

Najib Ahmed

Najib Ahmed

Cardiothoracic Surgery Department, AHEPA University hospital, Aristotle University of Thessaloniki, Greece

Naif Alhada

Naif Alhada

Cardiothoracic Surgery Department, AHEPA University hospital, Aristotle University of Thessaloniki, Greece