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Zhou N, Liu T, Wen B, Gong C, Wei G, Su Z. Recent Advances in the Construction of Flexible Sensors for Biomedical Applications. Biotechnol J 2020; 15:e2000094. [PMID: 32744777 DOI: 10.1002/biot.202000094] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 07/08/2020] [Indexed: 11/09/2022]
Abstract
The fabrication of flexible sensors is a potential way to promote the progress of modern social science and technology due to their wide applications in high-performance electronic equipment and devices. Flexible sensors based on organic materials combine the unique advantages of flexibility and low cost, increasing interest in healthcare monitoring, treatment, and human-machine interfaces. Advances in materials science and biotechnology have rapidly accelerated the development of bio-integrated multifunctional sensors and devices. Due to their excellent mechanical and electrical properties, many types of functional materials provided benefits for the construction of various sensors with improved flexibility and stretchability. In this review, recent advance in the fabrication of flexible sensors by using functional nanomaterials including nanoparticles, carbon materials, metal-organic materials, and polymers is presented. In addition, the potential biomedical applications of the fabricated flexible sensors for detecting gas molecules signals, small molecules, DNA/RNA, proteins, others are introduced and discussed.
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Affiliation(s)
- Nan Zhou
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Tianjiao Liu
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Bianying Wen
- School of Materials and Mechanical Engineering, Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, Beijing Technology and Business University, Beijing, 100048, China
| | - Coucong Gong
- Faculty of Production Engineering, University of Bremen, Bremen, D-28359, Germany
| | - Gang Wei
- Faculty of Production Engineering, University of Bremen, Bremen, D-28359, Germany.,College of Chemistry and Chemical Engineering, Qingdao University, Qingdao, 266071, China
| | - Zhiqiang Su
- State Key Laboratory of Chemical Resource Engineering, Beijing Key Laboratory of Advanced Functional Polymer Composites, Beijing University of Chemical Technology, Beijing, 100029, China
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Abstract
Tantalum films were deposited on negatively biased Ti6Al4V substrates using filtered cathodic vacuum arc deposition to enhance the corrosion resistance of the Ti6Al4V alloy. The effect of substrate voltage bias on the microstructure, mechanical and corrosion properties was examined and the cytocompatibility of the deposited films was verified with mammalian cell culturing. The Ta films deposited with substrate bias of -100V and -200V show a mixture of predominantly β phase and minority of α phase. The Ta/-100V film shows adhesive failure at the Ti/Ta interface and a cohesive fracture is observed in Ta/-200V film. The Ta/-100V showed a significant improvement in corrosion resistance, which is attributed to the stable oxide layer. The in-vitro cytocompatibility of the materials was investigated using rat bone mesenchymal stem cells, and the results show that the Ta films have no adverse effect on mammalian cell adhesion and spreading proliferation.
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Fekry AM, El-Kamel RS, Ghoneim AA. Electrochemical behavior of surgical 316L stainless steel eye glaucoma shunt (Ex-PRESS) in artificial aqueous humor. J Mater Chem B 2016; 4:4542-4548. [DOI: 10.1039/c6tb00712k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel system of electrodeposited gold nanoparticles on a carbon paste electrode was utilized as an electrochemical sensor to monitor the corrosion performance of 316L stainless steel alloy in aqueous humor containing moxifloxacin hydrochloride (MFH) drug.
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Affiliation(s)
- Amany M. Fekry
- Chemistry Department
- Faculty of Science
- Cairo University
- Giza 12613
- Egypt
| | - Renad S. El-Kamel
- Chemistry Department
- Faculty of Science
- Cairo University
- Giza 12613
- Egypt
| | - Azza A. Ghoneim
- Chemistry Department
- Faculty of Science
- Cairo University
- Giza 12613
- Egypt
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El-Gamel NEA, Fekry AM. Antimicrobial ruthenium complex coating on the surface of titanium alloy. High efficiency anticorrosion protection of ruthenium complex. Bioelectrochemistry 2015; 104:35-43. [PMID: 25731757 DOI: 10.1016/j.bioelechem.2015.02.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2014] [Revised: 02/13/2015] [Accepted: 02/15/2015] [Indexed: 10/24/2022]
Abstract
A ruthenium complex was prepared and structurally characterized using various techniques. Antibacterial and antifungal activities of ruthenium complex were evaluated. High significant antimicrobial activity against Escherichia coli, Staphylococcus aureus and Candida albicans was recorded. Minor cytotoxicity records were reported at the highest concentration level using MTT assay. The influence of Cu(II), Cr(III), Fe(III) and Ru(III) metal ions of salen Schiff base on the corrosion resistance of Ti-alloy in 0.5M HCl was studied. In vitro corrosion resistance was investigated using electrochemical impedance spectroscopy (EIS) measurements and confirmed by surface examination via scanning electron microscope (SEM) technique. Both impedance and phase angle maximum (θ(max)) values were at maximum in the case of the ruthenium complex with promising antibacterial and antifungal activities. The surface film created by the ruthenium complex was highly resistant against attack or deterioration by bacteria. The EIS study showed high impedance values for the ruthenium complex with increasing exposure time up to 8 days. SEM images showed uniform distribution and adsorption of Ru(III) ions on Ti-alloy surface. The ruthenium complex, as a model of organic-inorganic hybrid complex, offered new prospects with desired properties in industrial and medical applications.
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Affiliation(s)
- Nadia E A El-Gamel
- Chemistry Department, Faculty of Science, Cairo University, 12613 Giza, Egypt.
| | - Amany M Fekry
- Chemistry Department, Faculty of Science, Cairo University, 12613 Giza, Egypt
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Tamam E, Turkyilmaz I. Effects of pH and elevated glucose levels on the electrochemical behavior of dental implants. J ORAL IMPLANTOL 2014; 40:153-9. [PMID: 24779948 DOI: 10.1563/aaid-joi-d-11-00083] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Implant failure is more likely to occur in persons with medically compromising systemic conditions, such as diabetes related to high blood glucose levels and inflammatory diseases related to pH levels lower than those in healthy people. The aim of this study was to investigate the effects of lower pH level and simulated- hyperglycemia on implant corrosion as these effects are critical to biocompatibility and osseointegration. The electrochemical corrosion properties of titanium implants were studied in four different solutions: Ringer's physiological solution at pH = 7.0 and pH = 5.5 and Ringer's physiological solution containing 15 mM dextrose at pH = 7 and pH = 5.5. Corrosion behaviors of dental implants were determined by cyclic polarization test and electrochemical impedance spectroscopy. Surface alterations were studied using a scanning electron microscope. All test electrolytes led to apparent differences in corrosion behavior of the implants. The implants under conditions of test exhibited statistically significant increases in I(corr) from 0.2372 to 1.007 μAcm(-2), corrosion rates from 1.904 to 8.085 mpy, and a decrease in polarization resistances from 304 to 74 Ω. Implants in dextrose-containing solutions were more prone to corrosion than those in Ringer's solutions alone. Increasing the acidity also yielded greater corrosion rates for the dextrose-containing solutions and the solutions without dextrose.
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Affiliation(s)
- Evsen Tamam
- 1 Department of Prosthodontics, Dental School, Gazi University, Ankara, Turkey
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Cimpean A, Vasilescu E, Drob P, Cinca I, Vasilescu C, Anastasescu M, Mitran V, Drob SI. Enhancement of the electrochemical behaviour and biological performance of Ti–25Ta–5Zr alloy by thermo-mechanical processing. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 38:127-42. [DOI: 10.1016/j.msec.2014.01.056] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Revised: 01/15/2014] [Accepted: 01/30/2014] [Indexed: 11/16/2022]
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Ameer MA, Ghoneim AA, Fekry AM. Electrochemical and interface analysis of titanium alloy in simulated body fluid. SURF INTERFACE ANAL 2013. [DOI: 10.1002/sia.5349] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- M. A. Ameer
- Chemistry Department, Faculty of Science; Cairo University; Giza 12613 Egypt
| | - A. A. Ghoneim
- Chemistry Department, Faculty of Science; Cairo University; Giza 12613 Egypt
| | - A. M. Fekry
- Chemistry Department, Faculty of Science; Cairo University; Giza 12613 Egypt
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Vasilescu E, Drob P, Raducanu D, Cojocaru VD, Cinca I, Iordachescu D, Ion R, Popa M, Vasilescu C. In vitro biocompatibility and corrosion resistance of a new implant titanium base alloy. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2010; 21:1959-1968. [PMID: 20336353 DOI: 10.1007/s10856-010-4057-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2009] [Accepted: 03/11/2010] [Indexed: 05/29/2023]
Abstract
One objective of this work was to study the corrosion resistance of the new implant Ti-10Zr-5Ta-5Nb alloy in physiological fluids of different pH values, simulating the extreme functional conditions. Another objective was in vitro biocompatibility evaluation of the new alloy using human fetal osteoblast cell line hFOB 1.19. Cytocompatibility was assessed by determination of possible material cytotoxic effects, cell morphology and cell adhesion. The thermo-mechanical processing of the new implant alloy consisted in plastic deformation (almost 90%) performed by hot rolling accompanied by an initial and final heat treatment. The new Ti-10Zr-5Ta-5Nb alloy presented self-passivation, with a large passive potential range and low passive current densities, namely, a very good anticorrosive resistance in Ringer solution of acid, neutral and alkaline pH values. Cell viability was not affected by the alloy substrate presence and a very good compatibility was noticed.
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Affiliation(s)
- E Vasilescu
- Institute of Physical Chemistry "Ilie Murgulescu", Spl. Independentei 202, Bucharest 060021, Romania.
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Cámara OR, Avalle LB, Oliva FY. Protein adsorption on titanium dioxide: Effects on double layer and semiconductor space charge region studied by EIS. Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2010.03.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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De Giglio E, Cafagna D, Ricci M, Sabbatini L, Cometa S, Ferretti C, Mattioli-Belmonte M. Biocompatibility of Poly(Acrylic Acid) Thin Coatings Electro-synthesized onto TiAlV-based Implants. J BIOACT COMPAT POL 2010. [DOI: 10.1177/0883911510372290] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The protection of metal orthopedic implants against corrosion is a crucial medical problem. It was found that electrochemical polymerization of thin, passive poly(acrylic acid) (PAA) films on titanium and TiAlV substrates provides good anti-corrosion properties. In this work, an investigation of anti-corrosion features was carried out to clarify the hypothesis of the presence of an electrostatic contribution to the performance of a PAA coating. Ion release tests were performed at three different pHs; the pH dependence of the polymer swelling was examined by quartz crystal microbalance with dissipation monitoring, to establish the role of this phenomenon on the polymer barrier properties. The potential application of these PAA thin films as biocompatible protective coatings for metal implants and compatibility towards MG-63 human osteoblast-like cells was assessed.
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Affiliation(s)
- E. De Giglio
- Department of Chemistry, University of Bari, Bari, Italy
| | - D. Cafagna
- Department of Chemistry, University of Bari, Bari, Italy
| | - M.A. Ricci
- Department of Chemistry, University of Bari, Bari, Italy
| | - L. Sabbatini
- Department of Chemistry, University of Bari, Bari, Italy
| | - S. Cometa
- Laboratory of Bioactive Polymeric Materials for Biomedical & Environmental Applications, Chemistry & Industrial Chemistry Department University of Pisa, Pisa, Italy,
| | - C. Ferretti
- Department of Molecular Pathology and Innovative Therapies Marche Polytechnic University, Ancona, Italy
| | - M. Mattioli-Belmonte
- Department of Molecular Pathology and Innovative Therapies Marche Polytechnic University, Ancona, Italy
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Demetrescu I, Pirvu C, Mitran V. Effect of nano-topographical features of Ti/TiO(2) electrode surface on cell response and electrochemical stability in artificial saliva. Bioelectrochemistry 2010; 79:122-9. [PMID: 20189888 DOI: 10.1016/j.bioelechem.2010.02.001] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2009] [Revised: 01/17/2010] [Accepted: 02/03/2010] [Indexed: 11/16/2022]
Abstract
The paper is a new approach which aims to evaluate the relation between surface aspects (wettability and roughness) of materials based on titanium with native passive TiO(2) as untreated samples and TiO(2) nanotubes as treated discs respectively, their electrochemical stability in artificial saliva, and fibroblast cell behavior. Ti/TiO(2) modified electrodes as nanotubes with 120 nm as diameter were obtained using an electrochemical method as anodizing and surface analysis as SEM, AFM and contact angle measurements were performed to obtain topographical features and wettability. The TiO(2) nanotube structured oxide films electrochemical growth increases the stability of titanium surfaces. The electrochemical behavior of the Ti/TiO(2) nanotube surface was evaluated by corrosion parameters obtained from Tafel plots and electrical parameters for proposed circuits from electrochemical impedance spectroscopy were analyzed. The cell results indicated a slight preference in terms of cell survival and adhesion for nanostructure TiO(2) with a more hydrophilic character and the electrochemical data revealed that such features are connected with better stability in artificial saliva. The roughness seems to be not conclusive for this case.
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Affiliation(s)
- I Demetrescu
- University Politehnica of Bucharest, Faculty of Applied Chemistry and Materials Science, Polizu no 1-7, Bucharest, Romania
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Fekry A, El-Sherif RM. Electrochemical corrosion behavior of magnesium and titanium alloys in simulated body fluid. Electrochim Acta 2009. [DOI: 10.1016/j.electacta.2009.07.047] [Citation(s) in RCA: 100] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Electrochemical and structural evaluation of functionally graded bioglass-apatite composites electrophoretically deposited onto Ti6Al4V alloy. Electrochim Acta 2009. [DOI: 10.1016/j.electacta.2008.08.055] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Zabost E, Nowicka AM, Donten M, Stojek Z. Substantial difference between temperature dependencies of dsDNA predenaturation process obtained by voltammetry and spectroscopy. Phys Chem Chem Phys 2009; 11:8933-8. [DOI: 10.1039/b906752c] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Yeon JW, Pyun SI. The Fundamentals of Reduction of UO 22+Ions on a Pt Electrode and Methods for Improving Reduction Current Efficiency. JOURNAL OF THE KOREAN ELECTROCHEMICAL SOCIETY 2007. [DOI: 10.5229/jkes.2007.10.2.073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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