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Patel V, Das E, Bhargava A, Deshmukh S, Modi A, Srivastava R. Ionogels for flexible conductive substrates and their application in biosensing. Int J Biol Macromol 2024; 254:127736. [PMID: 38183203 DOI: 10.1016/j.ijbiomac.2023.127736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 10/18/2023] [Accepted: 10/26/2023] [Indexed: 01/07/2024]
Abstract
Ionogels are highly conductive gels made from ionic liquids dispersed in a matrix made of organic or inorganic materials. Ionogels are known for high ionic conductivity, flexibility, high thermal and electrochemical stability. These characteristics make them suitable for sensing and biosensing applications. This review discusses about the two main constituents, ionic liquids and matrix, used to make ionogels and effect of these materials on the characteristics of ionogels. Here, the material properties like mechanical, electrochemical and stability are discussed for both polymer matrix and ionic liquid. We have briefly described about the fabrication methods like 3D printing, sol-gel, blade coating, spin coating, aerosol jet printing etc., used to make films or coating of these ionogels. The advantages and disadvantages of each method are also briefly summarized. Finally, the last section provides a few examples of application of flexible ionogels in areas like wearables, human-machine interface, electronic skin and detection of biological molecules.
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Affiliation(s)
- Vinay Patel
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, 400076, India
| | - Eatu Das
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, 400076, India
| | - Ameesha Bhargava
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, 400076, India
| | - Sharvari Deshmukh
- MIT School of Bioengineering Sciences and Research, MIT ADT University, Loni Kalbhor, Pune 412201, India
| | - Anam Modi
- G.N. Khalsa College, Matunga, Mumbai 400019, India
| | - Rohit Srivastava
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, 400076, India.
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Demkiv O, Nogala W, Stasyuk N, Grynchyshyn N, Vus B, Gonchar M. The Peroxidase-like Nanocomposites as Hydrogen Peroxide-Sensitive Elements in Cholesterol Oxidase-Based Biosensors for Cholesterol Assay. J Funct Biomater 2023; 14:315. [PMID: 37367279 DOI: 10.3390/jfb14060315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 05/31/2023] [Accepted: 06/05/2023] [Indexed: 06/28/2023] Open
Abstract
Catalytically active nanomaterials, in particular, nanozymes, are promising candidates for applications in biosensors due to their excellent catalytic activity, stability and cost-effective preparation. Nanozymes with peroxidase-like activities are prospective candidates for applications in biosensors. The purpose of the current work is to develop cholesterol oxidase-based amperometric bionanosensors using novel nanocomposites as peroxidase (HRP) mimetics. To select the most electroactive chemosensor on hydrogen peroxide, a wide range of nanomaterials were synthesized and characterized using cyclic voltammetry (CV) and chronoamperometry. Pt NPs were deposited on the surface of a glassy carbon electrode (GCE) in order to improve the conductivity and sensitivity of the nanocomposites. The most HRP-like active bi-metallic CuFe nanoparticles (nCuFe) were placed on a previously nano-platinized electrode, followed by conjugation of cholesterol oxidase (ChOx) in a cross-linking film formed by cysteamine and glutaraldehyde. The constructed nanostructured bioelectrode ChOx/nCuFe/nPt/GCE was characterized by CV and chronoamperometry in the presence of cholesterol. The bionanosensor (ChOx/nCuFe/nPt/GCE) shows a high sensitivity (3960 A·M-1·m-2) for cholesterol, a wide linear range (2-50 µM) and good storage stability at a low working potential (-0.25 V vs. Ag/AgCl/3 M KCl). The constructed bionanosensor was tested on a real serum sample. A detailed comparative analysis of the bioanalytical characteristics of the developed cholesterol bionanosensor and the known analogs is presented.
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Affiliation(s)
- Olha Demkiv
- Institute of Cell Biology, National Academy of Sciences of Ukraine, 79005 Lviv, Ukraine
- Faculty of Veterinary Hygiene, Ecology and Law, Stepan Gzhytskyi National University of Veterinary Medicine and Biotechnologies, 79000 Lviv, Ukraine
| | - Wojciech Nogala
- Institute of Physical Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Poland
| | - Nataliya Stasyuk
- Institute of Cell Biology, National Academy of Sciences of Ukraine, 79005 Lviv, Ukraine
| | - Nadiya Grynchyshyn
- Faculty of Veterinary Hygiene, Ecology and Law, Stepan Gzhytskyi National University of Veterinary Medicine and Biotechnologies, 79000 Lviv, Ukraine
| | - Bohdan Vus
- Department of Electronics and Information Technology, Lviv Polytechnic National University, 79000 Lviv, Ukraine
| | - Mykhailo Gonchar
- Institute of Cell Biology, National Academy of Sciences of Ukraine, 79005 Lviv, Ukraine
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Kongintr U, Lertanantawong B, Promptmas C. A Label-Free Electrochemical Biosensor for Homocysteine Detection Using Molecularly Imprinted Polymer and Nanocomposite-Modified Electrodes. Polymers (Basel) 2023; 15:polym15102241. [PMID: 37242816 DOI: 10.3390/polym15102241] [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: 04/16/2023] [Revised: 05/02/2023] [Accepted: 05/08/2023] [Indexed: 05/28/2023] Open
Abstract
An essential biomarker for the early detection of cardiovascular diseases is serum homocysteine (Hcy). In this study, a molecularly imprinted polymer (MIP) and nanocomposite were used to create a label-free electrochemical biosensor for reliable Hcy detection. A novel Hcy-specific MIP (Hcy-MIP) was synthesized using methacrylic acid (MAA) in the presence of trimethylolpropane trimethacrylate (TRIM). The Hcy-MIP biosensor was fabricated by overlaying the mixture of Hcy-MIP and the carbon nanotube/chitosan/ionic liquid compound (CNT/CS/IL) nanocomposite on the surface of a screen-printed carbon electrode (SPCE). It showed high sensitivity, with a linear response of 5.0 to 150 µM (R2 of 0.9753) and with a limit of detection (LOD) at 1.2 µM. It demonstrated low cross-reactivity with ascorbic acid, cysteine, and methionine. Recoveries of 91.10-95.83% were achieved when the Hcy-MIP biosensor was used for Hcy at 50-150 µM concentrations. The repeatability and reproducibility of the biosensor at the Hcy concentrations of 5.0 and 150 µM were very good, with coefficients of variation at 2.27-3.50% and 3.42-4.22%, respectively. This novel biosensor offers a new and effective method for Hcy assay compared with the chemiluminescent microparticle immunoassay at the correlation coefficient (R2) of 0.9946.
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Affiliation(s)
- Unchalee Kongintr
- Biosensor Laboratory, Department of Biomedical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom 73170, Thailand
- Faculty of Medical Technology, Huachiew Chalermprakiat University, Samut Prakan 10540, Thailand
| | - Benchaporn Lertanantawong
- Biosensor Laboratory, Department of Biomedical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom 73170, Thailand
| | - Chamras Promptmas
- Biosensor Laboratory, Department of Biomedical Engineering, Faculty of Engineering, Mahidol University, Nakhon Pathom 73170, Thailand
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Priyadarshini E, Pandey S, Rawat K. Gold-carbon dot (Au@Cd) nanoconjugates based electrochemical sensing of cholesterol and effect of nitrogen ion implantation on sensitivity. Biochem Biophys Res Commun 2023; 655:97-103. [PMID: 36934590 DOI: 10.1016/j.bbrc.2023.03.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 02/20/2023] [Accepted: 03/06/2023] [Indexed: 03/09/2023]
Abstract
Serum cholesterol dysregulation is associated with prognosis and diagnosis of many diseases and effective biosensor will improvise their management. A novel electrochemical biosensor was fabricated based on gelatin-Au@CD nanoconjugate films for cholesterol detection. Initially, the surface of indium titanium oxide (ITO) coated glass was modified by drop casting of gelatin-Au@CD nanoconjugates to prepare the electrodes. Electrochemical studies for detection of bioanalytes(such as urea (U), ascorbic acid (AA), oxalic acid (OA), gallic acid (GA), cholesterol (Chox), dextrose (D), l-cysteine (Cys) and citric acid (CA)) were performed using cyclic voltammetry. The presence of nanoconjugates provided an appropriate environment for enhanced electrochemical response for cholesterol. These electrodes exhibited a linear response towards the presence of cholesterol in the linear concentration range of 2-20 mM with a correlation coefficient of 0.95, and the superior sensitivity of 1.36 μA/mM/cm2. Additionally, enhanced sensitivity (2.99 μA/mM/cm2) of nitrogen ion irradiated films up to a fluence of 1016 ions/cm2 was noticed because of morphological changes in the electrode surface brought about by irradiation. Approximately 54% enhancement was found when the ion fluence was 1016 ions/cm2. The designed nanoconjugate electrode showed excellent response towards cholesterol sensing and eliminates the requirement of any enzymes making the overall process simpler, cost-effective and allows for room temperature storage.
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Affiliation(s)
| | - Saurabh Pandey
- Department of Biochemistry, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi, India.
| | - Kamla Rawat
- Department of Chemistry, School of Chemical and Life Sciences, Jamia Hamdard, New Delhi, India.
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Jalalvand AR. Chemometrics-assisted electrochemical biosensing of cholesterol as the sole precursor of steroids by a novel electrochemical biosensor. Steroids 2023; 190:109159. [PMID: 36566822 DOI: 10.1016/j.steroids.2022.109159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 12/09/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022]
Abstract
This project was performed with the aims of increasing the sensitivity of differential pulse voltammetry (DPV) which itself is a sensitive electroanalytical technique, and also to compare the area under peak (univariate calibration), height of peak (univariate calibration) and whole of vector (multivariate calibration) for calibration purposes. These topics were investigated by fabrication of a novel electrochemical biosensor for determination of cholesterol (CHO). The procedure used in this project was based on the synthesis of molecularly imprinted polymers (MIPs) to the preconcentration of CHO and its biosensing by a rotating glassy carbon electrode (GCE) modified by co-immobilization of cholesterol oxidase (CO), cholesterol esterase (CE) and horseradish peroxidase (HP) onto multiwalled carbon nanotubes-ionic liquid (COCEHP/MWCNTs-IL/GCE). The results showed that the hydrodynamic DPV (HYDPV) was much more sensitive than DPV and using the area under peak for univariate calibration purposes was more suitable than height of peak. Adsorption at the electrode surface is an important trouble which affects the height and position of voltammetric peaks, but the area under peak is not affected by adsorption therefore, it can be more suitable for univariate calibration purposes. The biosensor response was also calibrated by chronoamperometry and the results confirmed that the HYDPV was more sensitive than chronoamperometry. The next attempt was based on recording the biosensor responses based on second-order HYDPV data and modeling of them (whole of vectors) by three-way calibration methods which showed the best performance among the tested methods for determination of CHO. The biosensor response was long-term stable, repeatable and reproducible which was successfully applied to the analysis of serum sample towards determination of CHO whose results were comparable with a reference method.
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Affiliation(s)
- Ali R Jalalvand
- Research Center of Oils and Fats, Research Institute for Health Technology, Kermanshah University of Medical Sciences, Kermanshah, Iran.
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Hefnawy MA, Fadlallah SA, El-Sherif RM, Medany SS. Competition between enzymatic and non-enzymatic electrochemical determination of cholesterol. J Electroanal Chem (Lausanne) 2023. [DOI: 10.1016/j.jelechem.2023.117169] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Khan RS, Rather AH, Wani TU, Rather SU, Amna T, Hassan MS, Sheikh FA. Recent trends using natural polymeric nanofibers as supports for enzyme immobilization and catalysis. Biotechnol Bioeng 2023; 120:22-40. [PMID: 36169115 DOI: 10.1002/bit.28246] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Revised: 08/25/2022] [Accepted: 09/23/2022] [Indexed: 11/09/2022]
Abstract
All the disciplines of science, especially biotechnology, have given continuous attention to the area of enzyme immobilization. However, the structural support made by material science intervention determines the performance of immobilized enzymes. Studies have proven that nanostructured supports can maintain better catalytic performance and improve immobilization efficiency. The recent trends in the application of nanofibers using natural polymers for enzyme immobilization have been addressed in this review article. A comprehensive survey about the immobilization strategies and their characteristics are highlighted. The natural polymers, e.g., chitin, chitosan, silk fibroin, gelatin, cellulose, and their blends with other synthetic polymers capable of immobilizing enzymes in their 1D nanofibrous form, are discussed. The multiple applications of enzymes immobilized on nanofibers in biocatalysis, biosensors, biofuels, antifouling, regenerative medicine, biomolecule degradation, etc.; some of these are discussed in this review article.
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Affiliation(s)
- Rumysa S Khan
- Nanostructured and Biomimetic Lab, Department of Nanotechnology, University of Kashmir Hazratbal, Srinagar, Jammu and Kashmir, India
| | - Anjum H Rather
- Nanostructured and Biomimetic Lab, Department of Nanotechnology, University of Kashmir Hazratbal, Srinagar, Jammu and Kashmir, India
| | - Taha U Wani
- Nanostructured and Biomimetic Lab, Department of Nanotechnology, University of Kashmir Hazratbal, Srinagar, Jammu and Kashmir, India
| | - Sami-Ullah Rather
- Department of Chemical and Materials Engineering, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Touseef Amna
- Department of Biology, Faculty of Science, Albaha University, Albaha, Saudi Arabia
| | - M Shamshi Hassan
- Department of Chemistry, Faculty of Science, Albaha University, Albaha, Saudi Arabia
| | - Faheem A Sheikh
- Nanostructured and Biomimetic Lab, Department of Nanotechnology, University of Kashmir Hazratbal, Srinagar, Jammu and Kashmir, India
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Mishra K, Devi N, Siwal SS, Zhang Q, Alsanie WF, Scarpa F, Thakur VK. Ionic Liquid-Based Polymer Nanocomposites for Sensors, Energy, Biomedicine, and Environmental Applications: Roadmap to the Future. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2202187. [PMID: 35853696 PMCID: PMC9475560 DOI: 10.1002/advs.202202187] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 05/30/2022] [Indexed: 05/19/2023]
Abstract
Current interest toward ionic liquids (ILs) stems from some of their novel characteristics, like low vapor pressure, thermal stability, and nonflammability, integrated through high ionic conductivity and broad range of electrochemical strength. Nowadays, ionic liquids represent a new category of chemical-based compounds for developing superior and multifunctional substances with potential in several fields. ILs can be used in solvents such as salt electrolyte and additional materials. By adding functional physiochemical characteristics, a variety of IL-based electrolytes can also be used for energy storage purposes. It is hoped that the present review will supply guidance for future research focused on IL-based polymer nanocomposites electrolytes for sensors, high performance, biomedicine, and environmental applications. Additionally, a comprehensive overview about the polymer-based composites' ILs components, including a classification of the types of polymer matrix available is provided in this review. More focus is placed upon ILs-based polymeric nanocomposites used in multiple applications such as electrochemical biosensors, energy-related materials, biomedicine, actuators, environmental, and the aviation and aerospace industries. At last, existing challenges and prospects in this field are discussed and concluding remarks are provided.
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Affiliation(s)
- Kirti Mishra
- Department of ChemistryM.M. Engineering CollegeMaharishi Markandeshwar (Deemed to be University)Mullana‐AmbalaHaryana133207India
| | - Nishu Devi
- Mechanics and Energy LaboratoryDepartment of Civil and Environmental EngineeringNorthwestern University2145 Sheridan RoadEvanstonIL60208USA
| | - Samarjeet Singh Siwal
- Department of ChemistryM.M. Engineering CollegeMaharishi Markandeshwar (Deemed to be University)Mullana‐AmbalaHaryana133207India
| | - Qibo Zhang
- Key Laboratory of Ionic Liquids MetallurgyFaculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunming650093P. R. China
- State Key Laboratory of Complex Nonferrous Metal Resources Cleaning Utilization in Yunnan ProvinceKunming650093P. R. China
| | - Walaa F. Alsanie
- Department of Clinical Laboratories SciencesThe Faculty of Applied Medical SciencesTaif UniversityP.O. Box 11099Taif21944Saudi Arabia
| | - Fabrizio Scarpa
- Bristol Composites InstituteUniversity of BristolBristolBS8 1TRUK
| | - Vijay Kumar Thakur
- Biorefining and Advanced Materials Research CenterScotland's Rural College (SRUC)Kings Buildings, West Mains RoadEdinburghEH9 3JGUK
- School of EngineeringUniversity of Petroleum and Energy Studies (UPES)DehradunUttarakhand248007India
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A Facile Hydrothermal Synthesis of MWCNT(SH)/CeO2@Se Nanohybrid Materials with Enhanced Antimicrobial Activity. BIONANOSCIENCE 2022. [DOI: 10.1007/s12668-022-00942-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Bravo I, Prata M, Torrinha Á, Delerue-Matos C, Lorenzo E, Morais S. Laccase bioconjugate and multi-walled carbon nanotubes-based biosensor for bisphenol A analysis. Bioelectrochemistry 2021; 144:108033. [PMID: 34922175 DOI: 10.1016/j.bioelechem.2021.108033] [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: 08/17/2021] [Revised: 11/15/2021] [Accepted: 11/29/2021] [Indexed: 12/22/2022]
Abstract
Bisphenol A (BPA) is an endocrine disruptor compound that has been detected in aquatic ecosystems. In this work, the development of an electrochemical biosensor for BPA determination based on laccase from Trametes versicolor is reported. A bioconjugate was optimized to maximize the biosensor electrocatalytic activity and stability, which for the first time involved the synergistic effect of this specific enzyme (6.8 UmL-1), chitosan (5 mgmL-1) and the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate in an optimum 5:5:2 (v/v/v) proportion. This bioconjugate was deposited onto a screen-printed carbon electrode previously modified with multi-walled carbon nanotubes (MWCNTs). Nanostructuration with MWCNTs enlarged the electrocatalytic activity and surface area, thus improving the biosensor performance. The BPA electrochemical reaction follows an EC mechanism at the optimum pH value of 5.0. Linearity up to 12 µM, a sensitivity of (6.59 ± 0.04) × 10-2 μAμM-1 and a detection limit of 8.4 ± 0.3 nM were obtained coupled with high reproducibility (relative standard deviations lower than 6%) and stability (87% of the initial response after one month). The developed biosensor was employed to the analysis of BPA in river water displaying appropriate accuracy (94.6-97.9%) and repeatability (3.1 to 6% relative standard deviations) proving its high potential applicability for in situ environmental analysis.
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Affiliation(s)
- Iria Bravo
- REQUIMTE-LAQV, Instituto Superior de Engenharia do Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 431, 4249-015 Porto, Portugal; Departamento de Química Analítica y Análisis Instrumental, Universidad Autónoma de Madrid, 28049 Madrid, Spain; Instituto Madrileño de Estudios Avanzados (IMDEA) Nanociencia, Faraday, 9, Campus UAM, Cantoblanco, 28049 Madrid, Spain.
| | - Mariana Prata
- REQUIMTE-LAQV, Instituto Superior de Engenharia do Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 431, 4249-015 Porto, Portugal
| | - Álvaro Torrinha
- REQUIMTE-LAQV, Instituto Superior de Engenharia do Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 431, 4249-015 Porto, Portugal
| | - Cristina Delerue-Matos
- REQUIMTE-LAQV, Instituto Superior de Engenharia do Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 431, 4249-015 Porto, Portugal
| | - Encarnación Lorenzo
- Departamento de Química Analítica y Análisis Instrumental, Universidad Autónoma de Madrid, 28049 Madrid, Spain; Instituto Madrileño de Estudios Avanzados (IMDEA) Nanociencia, Faraday, 9, Campus UAM, Cantoblanco, 28049 Madrid, Spain
| | - Simone Morais
- REQUIMTE-LAQV, Instituto Superior de Engenharia do Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida 431, 4249-015 Porto, Portugal.
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Recent advances in carbon nanotubes-based biocatalysts and their applications. Adv Colloid Interface Sci 2021; 297:102542. [PMID: 34655931 DOI: 10.1016/j.cis.2021.102542] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 10/04/2021] [Accepted: 10/06/2021] [Indexed: 12/23/2022]
Abstract
Enzymes have been incorporated into a wide variety of fields and industries as they catalyze many biochemical and chemical reactions. The immobilization of enzymes on carbon nanotubes (CNTs) for generating nano biocatalysts with high stability and reusability is gaining great attention among researchers. Functionalized CNTs act as excellent support for effective enzyme immobilization. Depending on the application, the enzymes can be tailored using the various surface functionalization techniques on the CNTs to extricate the desirable characteristics. Aiming at the preparation of efficient, stable, and recyclable nanobiocatalysts, this review provides an overview of the methods developed to immobilize the various enzymes. Various applications of carbon nanotube-based biocatalysts in water purification, bioremediation, biosensors, and biofuel cells have been comprehensively reviewed.
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Francklin Philips M, Thangarathinam J, Princy J, Crispin Tina CA, Crispin Tina CA, Kasthuri A. Synthesis of Nanocomposites of V₂ OO 5©Selenium Nanoparticles and Multiwalled Carbon Nanotubes for Antimicrobial Activity. JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY 2021; 21:5673-5680. [PMID: 33980379 DOI: 10.1166/jnn.2021.19482] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The authors report the preparation of the nanocomposite comprising of vanadium pentoxide (V₂O5) and selenium (Se) nanoparticles and functionalized multiwalled carbon nanotubes (MWCNTs) (V₂O5@Se NPs/MWCNTs). Since Se NPs possesses extraordinary physicochemical properties including larger surface area with higher adsorption capacity, V₂O5 NPs were adsorbed onto Se NPs surface through physisorption process (designated as V₂O5@Se NPs). The nanocomposite synthesized hydrothermally was evaluated for its antimicrobial activity. The morphology and microstructure of the nanocomposite were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD) analysis, respectively. Fourier transform infrared spectroscopy (FTIR) and UV-Visible spectroscopy (UV-Vis) were employed to analyze the spectral properties of nanocomposite. The microbicidal efficacy of nanocomposite was tested against Gram-negative (G-)ZGram-positive (G+) bacteria and fungus. This is the first report on the synthesis of V₂O5@Se NPs/MWCNTs nanocomposites by chemical method that showed microbicidal effect on micro-organisms. The thiol (-SH) units facilitates the enrichment of V₂O5@Se NPs onto MWCNTs surface. Ultimately, it reflects on the significant antimicrobial activity of V₂O5@Se NPs/MWCNTs.
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Affiliation(s)
| | - Jothirathinam Thangarathinam
- P.G. and Research Department of Chemistry, Bishop Heber College (Autonomous), Tiruchirappalli 620017, Tamilnadu, India
| | - Jayakumar Princy
- P.G. and Research Department of Chemistry, Bishop Heber College (Autonomous), Tiruchirappalli 620017, Tamilnadu, India
| | - Cyril Arockiaraj Crispin Tina
- P.G. and Research Department of Chemistry, Bishop Heber College (Autonomous), Tiruchirappalli 620017, Tamilnadu, India
| | - Cyril Arockiaraj Crispin Tina
- P.G. and Research Department of Chemistry, Bishop Heber College (Autonomous), Tiruchirappalli 620017, Tamilnadu, India
| | - Annadurai Kasthuri
- P.G. and Research Department of Chemistry, Bishop Heber College (Autonomous), Tiruchirappalli 620017, Tamilnadu, India
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Jiwanti PK, Sultana S, Wicaksono WP, Einaga Y. Metal modified carbon-based electrode for CO2 electrochemical reduction: A review. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115634] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Eskandari P, Abousalman-Rezvani Z, Roghani-Mamaqani H, Salami-Kalajahi M. Polymer-functionalization of carbon nanotube by in situ conventional and controlled radical polymerizations. Adv Colloid Interface Sci 2021; 294:102471. [PMID: 34214841 DOI: 10.1016/j.cis.2021.102471] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 06/20/2021] [Accepted: 06/21/2021] [Indexed: 02/07/2023]
Abstract
Functionalization of carbon nanotube (CNT) with polymers has drawn much attention due to its wide range of applications. Polymer-functionalized CNT could exhibit variety of properties, such as responsivity to environmental stimuli, ability of complexation with metal ions, increased dispersibility in different solvents, higher compatibility with polymer matrix, etc. Chemical and physical methods have been developed for the preparation of polymer-functionalized CNT. Polymer chains are chemically bonded to the CNT edge or surface in the chemical methods, which results in highly stable CNT/polymer composites. "Grafting to", "grafting from", and "grafting through" methods are the most common chemical methods for polymer-functionalization of CNT. In "grafting to" method, pre-fabricated polymer chains are coupled with the either functionalized or non-functionalized CNT. In "grafting from" and "grafting through" methods, CNT is functionalized by polymers simultaneously synthesized by in situ polymerization methods. Conventional free radical polymerization (FRP) and also controlled radical polymerization (CRP) are the most promising methods for in situ tethering of polymer brushes onto the surface of CNT due to their control over the grafting density, thickness, and functionality of the polymer brushes. The main focus of this review is on the synthesis of polymer-functionalized CNT via both the "grafting from" and "grafting through" methods on the basis of FRP and CRP routs, which is commonly known as in situ polymerizations. Finally, the most important challenges and applications of the in situ polymer grafting methods are discussed, which could be interesting for the future works.
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Aydın EB, Aydın M, Sezgintürk MK. New Impedimetric Sandwich Immunosensor for Ultrasensitive and Highly Specific Detection of Spike Receptor Binding Domain Protein of SARS-CoV-2. ACS Biomater Sci Eng 2021; 7:3874-3885. [PMID: 34292712 DOI: 10.1021/acsbiomaterials.1c00580] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
An impedance sensing platform-combined conducting nanocomposite layer was fabricated to develop an effective and rapid method for detection of coronavirus infection (COVID-19) specific spike receptor binding domain (RBD) protein, a precious antigen marker of COVID-19 disease. Coronavirus infection has spread globally and swiftly with major impacts on health, economy, and quality of life of communities. Fast and reliable detection of COVID-19 is a very significant issue for the effective treatment of this bad illness. For this aim, first, an Epoxy functional group-substituted thiophene monomer was synthesized and electrodeposited on a single-use indium tin oxide (ITO) platform in the presence of acetylene black by employing a cyclic voltammetry technique; thus, a conducting nanocomposite (C-NC) layer with high conductivity was obtained. This composite was electrodeposited for the first time on the ITO surface to generate a facile and cost-effective impedimetric biosensor. In addition, this composite provided proper attachment points for antibody binding and also supported the biosensor construction. The immuno-specific biointeractions between anti-RBD and RBD proteins hampered the electron transfer between the ITO substrate surface and electrolyte, and this reaction caused variations in impedance signals, and these signals were proportional to the immobilized RBD antigen amounts. The as-prepared immunosensor showed a wide linear dynamic range (0.0012-120 pg/mL), an ultra-low detection limit of 0.58 fg/mL with added superiorities of great selectivity, suitable repeatability, multiple reusability, and excellent reproducibility.
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Affiliation(s)
- Elif Burcu Aydın
- Scientific and Technological Research Center, Tekirdağ Namık Kemal University, Tekirdağ 59030, Turkey
| | - Muhammet Aydın
- Scientific and Technological Research Center, Tekirdağ Namık Kemal University, Tekirdağ 59030, Turkey
| | - Mustafa Kemal Sezgintürk
- Bioengineering Department, Faculty of Engineering, Çanakkale Onsekiz Mart University, Çanakkale 17100, Turkey
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Hojnik Podrepšek G, Knez Ž, Leitgeb M. Development of Chitosan Functionalized Magnetic Nanoparticles with Bioactive Compounds. NANOMATERIALS 2020; 10:nano10101913. [PMID: 32992815 PMCID: PMC7599998 DOI: 10.3390/nano10101913] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Revised: 09/18/2020] [Accepted: 09/22/2020] [Indexed: 11/30/2022]
Abstract
In this study, magnetic maghemite nanoparticles, which belong to the group of metal oxides, were functionalized with chitosan, a non-toxic, hydrophilic, biocompatible, biodegradable biopolymer with anti-bacterial effects. This was done using different synthesis methods, and a comparison of the properties of the synthesized chitosan functionalized maghemite nanoparticles was conducted. Characterization was performed using scanning electron microscopy (SEM) and vibrating sample magnetometry (VSM). Characterizations of size distribution were performed using dynamic light scattering (DLS) measurements and laser granulometry. A chitosan functionalization layer was confirmed using potentiometric titration on variously synthesized chitosan functionalized maghemite nanoparticles, which is important for further immobilization of bioactive compounds. Furthermore, after activation of chitosan functionalized maghemite nanoparticles with glutaraldehyde (GA) or pentaethylenehexamine (PEHA), immobilization studies of enzyme cholesterol oxidase (ChOx) and horseradish peroxidase (HRP) were conducted. Factors influencing the immobilization of enzymes, such as type and concentration of activating reagent, mass ratio between carrier and enzyme, immobilization time and enzyme concentration, were investigated. Briefly, microparticles made using the chitosan suspension cross-linking process (MC2) proved to be the most suitable for obtaining the highest activity of immobilized enzyme, and nanoparticles functionalized with chitosan using the covalent binding method (MC3) could compete with MC2 for their applications.
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Affiliation(s)
- Gordana Hojnik Podrepšek
- Laboratory for Separation Processes and Product Design, Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova ul. 17, 2000 Maribor, Slovenia; (G.H.P.); (Ž.K.)
| | - Željko Knez
- Laboratory for Separation Processes and Product Design, Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova ul. 17, 2000 Maribor, Slovenia; (G.H.P.); (Ž.K.)
- Faculty of Medicine, University of Maribor, Taborska ulica 8, 2000 Maribor, Slovenia
| | - Maja Leitgeb
- Laboratory for Separation Processes and Product Design, Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova ul. 17, 2000 Maribor, Slovenia; (G.H.P.); (Ž.K.)
- Faculty of Medicine, University of Maribor, Taborska ulica 8, 2000 Maribor, Slovenia
- Correspondence: ; Tel.: +386-222-94-462
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Basheer BV, George JJ, Siengchin S, Parameswaranpillai J. Polymer grafted carbon nanotubes—Synthesis, properties, and applications: A review. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/j.nanoso.2020.100429] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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18
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Alagappan M, Immanuel S, Sivasubramanian R, Kandaswamy A. Development of cholesterol biosensor using Au nanoparticles decorated f-MWCNT covered with polypyrrole network. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2018.02.018] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
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19
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Wang K, Li Z, Wang C, Zhang S, Cui W, Xu Y, Zhao J, Xue H, Li J. Assembled cationic dipeptide-gold nanoparticle hybrid microspheres for electrochemical biosensors with enhanced sensitivity. J Colloid Interface Sci 2019; 557:628-634. [DOI: 10.1016/j.jcis.2019.09.033] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2019] [Revised: 09/08/2019] [Accepted: 09/10/2019] [Indexed: 12/15/2022]
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20
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Analytical applications and physicochemical properties of ionic liquid-based hybrid materials: A review. Anal Chim Acta 2019; 1054:1-16. [DOI: 10.1016/j.aca.2018.10.061] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 10/23/2018] [Accepted: 10/25/2018] [Indexed: 12/14/2022]
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Zhu J, Ye Z, Fan X, Wang H, Wang Z, Chen B. A highly sensitive biosensor based on Au NPs/rGO-PAMAM-Fc nanomaterials for detection of cholesterol. Int J Nanomedicine 2019; 14:835-849. [PMID: 30774337 PMCID: PMC6354697 DOI: 10.2147/ijn.s184013] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Objective This study aimed to construct a biosensor using Au nanoparticles (Au NPs) and reduced graphene-polyamide-amine-ferrocene (rGO-PAMAM-Fc) nanomaterials designed for rapid and sensitive detection of cholesterol. Materials and methods In this study, a highly sensitive biosensor based on Au NPs/ rGO-PAMAM-Fc nanomaterials was manufactured for detection of cholesterol. The rGO-PAMAM-Fc and Au NPs were modified on the surface of the electrode and then coated with cholesterol oxidase (ChOx) and cholesterol esterase (ChEt) to develop the ChOx&ChEt/Au NPs/rGO-PAMAM-Fc biosensor. Results The capability of rGO-PAMAM-Fc nanomaterials in fabricating a more efficient biosensor was validated through stability, selectivity and reproducibility checks. Under optimal conditions, the newly developed biosensor showed a linear relationship with logarithm of cholesterol concentration from 0.0004 to 15.36 mM (R2=0.9986), and a low detection limit of 2 nM was obtained at the signal/noise ratio of 3. Conclusion The ChOx&ChEt/Au NPs/rGO-PAMAM-Fc biosensor was successfully applied for the measurement of cholesterol in human serum, which implies that the biosensor has a potential application in clinical diagnostics.
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Affiliation(s)
- Jianmeng Zhu
- Department of Clinical Laboratory, Chun'an First People's Hospital (Zhejiang Provincial People's Hospital Chun'an Branch), Hangzhou, Zhejiang, China, ,
| | - Zhilu Ye
- Department of Clinical Laboratory, Chun'an First People's Hospital (Zhejiang Provincial People's Hospital Chun'an Branch), Hangzhou, Zhejiang, China, ,
| | - Xiaoying Fan
- Department of Clinical Laboratory, Chun'an First People's Hospital (Zhejiang Provincial People's Hospital Chun'an Branch), Hangzhou, Zhejiang, China, ,
| | - Hongqin Wang
- Department of Clinical Laboratory, Chun'an First People's Hospital (Zhejiang Provincial People's Hospital Chun'an Branch), Hangzhou, Zhejiang, China, ,
| | - Zhen Wang
- Department of Clinical Laboratory, Chun'an First People's Hospital (Zhejiang Provincial People's Hospital Chun'an Branch), Hangzhou, Zhejiang, China, , .,Department of Blood Transfusion, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, Zhejiang, China, ,
| | - Bingyu Chen
- Department of Clinical Laboratory, Chun'an First People's Hospital (Zhejiang Provincial People's Hospital Chun'an Branch), Hangzhou, Zhejiang, China, , .,Department of Blood Transfusion, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, Zhejiang, China, ,
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Anantha-Iyengar G, Shanmugasundaram K, Nallal M, Lee KP, Whitcombe MJ, Lakshmi D, Sai-Anand G. Functionalized conjugated polymers for sensing and molecular imprinting applications. Prog Polym Sci 2019. [DOI: 10.1016/j.progpolymsci.2018.08.001] [Citation(s) in RCA: 129] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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A disposable and ultrasensitive ITO based biosensor modified by 6-phosphonohexanoic acid for electrochemical sensing of IL-1β in human serum and saliva. Anal Chim Acta 2018; 1039:41-50. [DOI: 10.1016/j.aca.2018.07.055] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 07/19/2018] [Accepted: 07/23/2018] [Indexed: 01/11/2023]
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Rahim MZA, Govender-Hondros G, Adeloju SB. A single step electrochemical integration of gold nanoparticles, cholesterol oxidase, cholesterol esterase and mediator with polypyrrole films for fabrication of free and total cholesterol nanobiosensors. Talanta 2018; 189:418-428. [DOI: 10.1016/j.talanta.2018.06.041] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Revised: 06/10/2018] [Accepted: 06/11/2018] [Indexed: 10/14/2022]
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Buiculescu R, Stefanakis D, Androulidaki M, Ghanotakis D, Chaniotakis NA. Controlling carbon nanodot fluorescence for optical biosensing. Analyst 2018; 141:4170-80. [PMID: 27170233 DOI: 10.1039/c6an00783j] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
In this work we report on the optical properties of specific synthetic carbon nano-dots (CDs) and their suitability for the development of optical biosensors. We examine the photoluminescence behavior of these CDs under different conditions, in their native form, as well as when conjugated to the catalytic protein glucose oxidase (GOx) for the construction of optical glucose biosensors. The effect of pH and hydrogen peroxide on the observed spectra is examined as the basis for the biosensor development. The CDs examined here have inherent surface amino functional groups which allow for easy conjugation to biomolecules via EDC-NHS, providing a well defined platform for biosensing applications. We conclude that the well controlled, stable, and highly efficient fluorescence behavior of the CDs in solution or in conjugate, provides the grounds for this class of materials to be used in a variety of arrangements for the development of optical and optoelectrochemical detection systems.
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Affiliation(s)
- Raluca Buiculescu
- Laboratory of Analytical Chemistry, Department of Chemistry, University of Crete, Heraklion, 70013 Crete, Greece
| | - Dimitrios Stefanakis
- Laboratory of Biochemistry, Department of Chemistry, University of Crete, Heraklion, 70013 Crete, Greece
| | - Maria Androulidaki
- Microelectronics Research Group, IESL-FORTH, P.O. Box 1385, Heraklion 71110, Crete, Greece.
| | - Demetrios Ghanotakis
- Laboratory of Biochemistry, Department of Chemistry, University of Crete, Heraklion, 70013 Crete, Greece
| | - Nikos A Chaniotakis
- Laboratory of Analytical Chemistry, Department of Chemistry, University of Crete, Heraklion, 70013 Crete, Greece
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Electrocomposite Developed with Chitosan and Ionic Liquids Using Screen-Printed Carbon Electrodes Useful to Detect Rutin in Tropical Fruits. SENSORS 2018; 18:s18092934. [PMID: 30181437 PMCID: PMC6164375 DOI: 10.3390/s18092934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 08/28/2018] [Accepted: 08/28/2018] [Indexed: 11/27/2022]
Abstract
This work reports the development of a composite of the ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM]BP4) and chitosan (CS) described in previous reports through a new method using cyclic voltammetry with 10 cycles at a scan rate of 50.0 mV s−1. This method is different from usual methods such as casting, deposition, and constant potential, and it allows the development of an electroactive surface toward the oxidation of rutin by stripping voltammetry applied to the detection in tropical fruits such as orange, lemon, and agraz (Vaccinium meridionale Swartz), with results similar to those reported in previous studies. In addition, the surface was characterized by electrochemical impedance spectroscopy (EIS), scanning electron microscopy (SEM), and Raman spectroscopy. The limit of detection was 0.07 µmol L−1 and the relative standard deviation (RSD) of 10 measurements using the same modified electrode was 0.86%. Moreover, the stability of the sensor was studied for six days using the same modified electrode, where the variation of the signal using a known concentration of rutin (RT) was found to be less than 5.0%. The method was validated using a urine chemistry control spiked with known amounts of RT and possible interference was studied using ten substances including organic and biological compounds, metal ions, and dyes. The results obtained in this study demonstrated that this electrodeveloped composite was sensitive, selective, and stable.
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Farzin L, Shamsipur M, Samandari L, Sheibani S. Recent advances in designing nanomaterial based biointerfaces for electrochemical biosensing cardiovascular biomarkers. J Pharm Biomed Anal 2018; 161:344-376. [PMID: 30205301 DOI: 10.1016/j.jpba.2018.08.060] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Revised: 08/27/2018] [Accepted: 08/29/2018] [Indexed: 02/06/2023]
Abstract
Early diagnosis of cardiovascular disease (CVD) is critically important for successful treatment and recovery of patients. At present, detection of CVD at early stages of its progression becomes a major issue for world health. The nanoscale electrochemical biosensors exhibit diverse outstanding properties, rendering them extremely suitable for the determination of CVD biomarkers at very low concentrations in biological fluids. The unique advantages offered by electrochemical biosensors in terms of sensitivity and stability imparted by nanostructuring the electrode surface together with high affinity and selectivity of bioreceptors have led to the development of new electrochemical biosensing strategies that have introduced as interesting alternatives to conventional methodologies for clinical diagnostics of CVD. This review provides an updated overview of selected examples during the period 2005-2018 involving electrochemical biosensing approaches and signal amplification strategies based on nanomaterials, which have been applied for determination of CVD biomarkers. The studied CVD biomarkers include AXL receptor tyrosine kinase, apolipoproteins, cholesterol, C-reactive protein (CRP), D-dimer, fibrinogen (Fib), glucose, insulin, interleukins, lipoproteins, myoglobin, N-terminal pro-B-type natriuretic peptide (BNP), tumor necrosis factor alpha (TNF-α) and troponins (Tns) on electrochemical transduction format. Identification of new specific CVD biomarkers, multiplex bioassay for the simultaneous determination of biomarkers, emergence of microfluidic biosensors, real-time analysis of biomarkers and point of care validation with high sensitivity and selectivity are the major challenges for future research.
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Affiliation(s)
- Leila Farzin
- Radiation Application Research School, Nuclear Science and Technology Research Institute, 11365-3486, Tehran, Iran.
| | - Mojtaba Shamsipur
- Department of Chemistry, Razi University, 67149-67346, Kermanshah, Iran.
| | - Leila Samandari
- Department of Chemistry, Razi University, 67149-67346, Kermanshah, Iran
| | - Shahab Sheibani
- Radiation Application Research School, Nuclear Science and Technology Research Institute, 11365-3486, Tehran, Iran
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Rashidi K, Mahmoudi M, Mohammadi G, Zangeneh MM, Korani S, Goicoechea HC, Gu HW, Jalalvand AR. Simultaneous co-immobilization of three enzymes onto a modified glassy carbon electrode to fabricate a high-performance amperometric biosensor for determination of total cholesterol. Int J Biol Macromol 2018; 120:587-595. [PMID: 30170050 DOI: 10.1016/j.ijbiomac.2018.08.163] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 08/11/2018] [Accepted: 08/27/2018] [Indexed: 12/25/2022]
Abstract
In this work, we have fabricated a novel amperometric cholesterol (CHO) biosensor because of the importance of determination of CHO levels in blood which is an important parameter for diagnosis and prevention of disease. To achieve this goal, cholesterol oxidase, cholesterol esterase and horseradish peroxidase were simultaneously co-immobilized onto a glassy carbon electrode (GCE) modified with gold nanoparticles/chitin-ionic liquid/poly(3,4-ethylenedioxypyrrole)/graphene-multiwalled carbon nanotubes-1,1'-ferrocenedicarboxylic acid-ionic liquid. Modifications applied to the bare GCE were characterized by cyclic voltammetry, electrochemical impedance spectroscopy and scanning electron microscopy. The biosensor detected CHO in linear ranges of 0.1-25 μM and 25-950 μM with a detection limit of 0.07 μM. The sensitivity of the biosensor was estimated to be 6.6 μA μM-1 cm-2, its response time was <5 s and Michaelis-Menten constant was calculated to be 0.12 μM. Results obtained in this study revealed that the biosensor was selective, sensitive, stable, repeatable and reproducible. Finally, the biosensor was successfully applied to the determination of CHO levels in rats plasma.
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Affiliation(s)
- Khodabakhsh Rashidi
- Research Center of Oils and Fats, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Majid Mahmoudi
- Research Center of Oils and Fats, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Ghobad Mohammadi
- Department of Pharmaceutics, School of Pharmacy, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mohammad Mahdi Zangeneh
- Department of Clinical Science, Faculty of Veterinary Medicine, Razi University, Kermanshah, Iran; Pharmaceutical Sciences Research Center, Faculty of Pharmacy, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Shahla Korani
- Research Center of Oils and Fats, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Hector C Goicoechea
- Laboratorio de Desarrollo Analítico y Quimiometría (LADAQ), Catedra de Química Analítica I, Universidad Nacional del Litoral, Ciudad Universitaria, CC 242, S3000ZAA Santa Fe, Argentina
| | - Hui-Wen Gu
- College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, China
| | - Ali R Jalalvand
- Research Center of Oils and Fats, Kermanshah University of Medical Sciences, Kermanshah, Iran.
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Immanuel S, Elakkiya V, Alagappan M, Selvakumar R. Development of colorimetric cholesterol detection kit using TPU nanofibre/cellulose acetate membrane. IET Nanobiotechnol 2018; 12:557-561. [PMID: 30095412 DOI: 10.1049/iet-nbt.2017.0246] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
In this study, the authors report a simple fabrication of thermoplastic polyurethane (TPU) nanofibres-based kit for cholesterol detection. TPU is a polymer that is highly elastic, resistant to microorganisms, abrasion and compatible with blood; thus, making it a natural selection as an immobilisation matrix for cholesterol oxidase (ChOx) enzyme. The nanofibre was fabricated by electrospinning process and was characterised using scanning electron microscopy and Fourier transform-infrared spectroscopy. ChOx was covalently immobilised on TPU nanofibre and cholesterol level/concentration was visually found using 4-aminoantipyrine, a dye that reacts with H2O2 produced from the oxidation of cholesterol by ChOx and changes colour from yellow to red. The efficacy of the nanofibre to act as a detecting substrate was compared with cellulose acetate (CA) membrane, a well-documented enzyme immobilisation matrix. The optimisation of enzyme concentration and dye quantity were performed using standard ChOx spectrophotometric assay and the same was used in CA membrane and TPU nanofibre. The ChOx immobilised nanofibre showed good linear range from 2 to 10 mM with a lower detection limit of 2 mM and was highly stable compared to that of CA membrane. The enzyme immobilised nanofibre was further validated in serum samples.
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Affiliation(s)
- Susan Immanuel
- Nanobiotechnology Laboratory, PSG Institute of Advanced Studies, Coimbatore 641 004, Tamil Nadu, India
| | - Venugopal Elakkiya
- Nanobiotechnology Laboratory, PSG Institute of Advanced Studies, Coimbatore 641 004, Tamil Nadu, India
| | - Muthuppalaniappan Alagappan
- Department of Electronics and Communication Engineering, PSG College of Technology, Coimbatore 641 004, Tamil Nadu, India.
| | - Rajendran Selvakumar
- Nanobiotechnology Laboratory, PSG Institute of Advanced Studies, Coimbatore 641 004, Tamil Nadu, India
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Carbon Nanoelectrodes for the Electrochemical Detection of Neurotransmitters. INTERNATIONAL JOURNAL OF ELECTROCHEMISTRY 2018; 2018. [PMID: 34306762 PMCID: PMC8301601 DOI: 10.1155/2018/3679627] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Carbon-based electrodes have been developed for the detection of neurotransmitters over the past 30 years using voltammetry and amperometry. The traditional electrode for neurotransmitter detection is the carbon fiber microelectrode (CFME). The carbon-based electrode is suitable for in vivo neurotransmitter detection due to the fact that it is biocompatible and relatively small in surface area. The advent of nanoscale electrodes is in high demand due to smaller surface areas required to target specific brain regions that are also minimally invasive and cause relatively low tissue damage when implanted into living organisms. Carbon nanotubes (CNTs), carbon nanofibers, carbon nanospikes, and carbon nanopetals among others have all been utilized for this purpose. Novel electrode materials have also required novel insulations such as glass, epoxy, and polyimide coated fused silica capillaries for their construction and usage. Recent research developments have yielded a wide array of carbon nanoelectrodes with superior properties and performances in comparison to traditional electrode materials. These electrodes have thoroughly enhanced neurotransmitter detection allowing for the sensing of biological compounds at lower limits of detection, fast temporal resolution, and without surface fouling. This will allow for greater understanding of several neurological disease states based on the detection of neurotransmitters.
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Synthesis and Applications of a Novel 3,4-Bis(2-Fluoro-5-Trifluoromethyl Phenyl)-2,5-Diphenyl Phenyl Grafted Polysiloxane Stationary Phase. Chromatographia 2018. [DOI: 10.1007/s10337-018-3556-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Zestos AG, Venton BJ. Carbon Nanotube-Based Microelectrodes for Enhanced Neurochemical Detection. ECS TRANSACTIONS 2017; 80:1497-1509. [PMID: 33859773 PMCID: PMC8046031 DOI: 10.1149/08010.1497ecst] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Carbon nanotube (CNT) fiber microelectrodes have been developed as electrode materials for the detection of neurotransmitters using fast scan cyclic voltammetry (FSCV). We have used acid-wet spinning to create "neat" carbon nanotube fibers and utilized them as electrode materials. Thirty-forty micron diameter acid spun CNT fiber microelectrodes were more sensitive than PEI-CNT fiber microelectrodes, with a 3 nM limit of detection. They also had faster electron transfer kinetics and a greater reversibility for the oxidation of dopamine using FSCV than CFMEs and other carbon nanomaterials. The acid spun CNT fiber microelectrodes also displayed a frequency independent response for the peak oxidation current of dopamine. This property was also seen in other CNT materials such as PEI-CNT fiber microelectrodes and CNT-Yarn microelectrodes. Upon varying the frequency from 10 Hz to 100 Hz, there was no decrease in sensitivity. When scanning at 2,000 V/s, there was no decrease in sensitivity upon changing the frequency from 10 Hz to 500 Hz. This could potentially allow for a 2 ms sampling rate for FSCV, comparable to those used with amperometry as opposed to 100 ms temporal resolution of traditional FSCV, an almost two orders of magnitude difference. Since the frequency independent response is seen with many CNT fibers/yarns, it suggests it is a fundamental property of the CNTs shared by many types of CNT fibers and yarns.
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Affiliation(s)
- A G Zestos
- Department of Chemistry, American University, Washington, D.C., 20016, USA
| | - B J Venton
- Department of Chemistry, University of Virginia, Charlottesville, VA 22903, USA
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Prospects of ionic liquids application in electronic and bioelectronic nose instruments. Trends Analyt Chem 2017. [DOI: 10.1016/j.trac.2017.05.010] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Priyadarshini E, Rawat K. Au@carbon dot nanoconjugates as a dual mode enzyme-free sensing platform for cholesterol. J Mater Chem B 2017; 5:5425-5432. [PMID: 32264081 DOI: 10.1039/c7tb01345k] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
In this report, we present a novel application of gold-carbon dot nanoconjugates (Au@CDs) of an average size of around 12.6 nm as a sensor for the detection of cholesterol. The Au particles perform the dual function of displaying colorimetric sensing, and fluorescence quenching in response to cholesterol in the concentration range of 10-100 ppm (0.208-2.08 mM), wherein the carbon dots act as the fluorescent entity. Interestingly, the nanoconjugates were observed to show a high specificity to cholesterol resulting in their precipitation. A visible change in colour of the assay mixture along with fluorescence quenching was seen in the reaction mixture on treatment with cholesterol. The synthesized nanoconjugates had high selectivity towards cholesterol, even in the presence of interfering analytes, and a minimum detection limit of 0.12 ppm (0.0025 mM) in the linear range of 50-300 ppm (1-6.25 mM). We anticipate that these Au@CDs can be employed for the fabrication of enzyme-free strip-based biosensors for the detection of cholesterol.
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Gahlaut A, Hooda V, Dhull V, Hooda V. Recent approaches to ameliorate selectivity and sensitivity of enzyme based cholesterol biosensors: a review. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2017; 46:472-481. [DOI: 10.1080/21691401.2017.1337028] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Anjum Gahlaut
- Centre for Biotechnology, Maharshi Dayanand University, Rohtak, India
| | - Vinita Hooda
- Centre for Biotechnology, Maharshi Dayanand University, Rohtak, India
| | - Vikas Dhull
- Centre for Biotechnology, Maharshi Dayanand University, Rohtak, India
| | - Vikas Hooda
- Centre for Biotechnology, Maharshi Dayanand University, Rohtak, India
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36
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Kaur G, Tomar M, Gupta V. Nanostructured NiO-based reagentless biosensor for total cholesterol and low density lipoprotein detection. Anal Bioanal Chem 2017; 409:1995-2005. [DOI: 10.1007/s00216-016-0147-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 11/29/2016] [Accepted: 12/12/2016] [Indexed: 10/20/2022]
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37
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Galdino NM, Brehm GS, Bussamara R, Gonçalves WDG, Abarca G, Scholten JD. Sputtering deposition of gold nanoparticles onto graphene oxide functionalized with ionic liquids: biosensor materials for cholesterol detection. J Mater Chem B 2017; 5:9482-9486. [DOI: 10.1039/c7tb02582c] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The sputtering deposition of Au nanoparticles onto ionic liquid-graphene oxide combined with cholesterol oxidase affords an efficient biosensor for cholesterol detection.
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38
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Kumar S, Rani R, Dilbaghi N, Tankeshwar K, Kim KH. Carbon nanotubes: a novel material for multifaceted applications in human healthcare. Chem Soc Rev 2017; 46:158-196. [DOI: 10.1039/c6cs00517a] [Citation(s) in RCA: 263] [Impact Index Per Article: 37.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Remarkable advances achieved in modern material technology, especially in device fabrication, have facilitated diverse materials to expand the list of their application fields.
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Affiliation(s)
- Sandeep Kumar
- Department of Bio and Nano Technology
- Guru Jambheshwar University of Science and Technology
- Hisar
- India
| | - Ruma Rani
- Department of Bio and Nano Technology
- Guru Jambheshwar University of Science and Technology
- Hisar
- India
| | - Neeraj Dilbaghi
- Department of Bio and Nano Technology
- Guru Jambheshwar University of Science and Technology
- Hisar
- India
| | - K. Tankeshwar
- Department of Bio and Nano Technology
- Guru Jambheshwar University of Science and Technology
- Hisar
- India
- Department of Physics
| | - Ki-Hyun Kim
- Department of Civil & Environmental Engineering
- Hanyang University
- Seoul 04763
- Republic of Korea
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39
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Fabrication of a novel dual mode cholesterol biosensor using titanium dioxide nanowire bridged 3D graphene nanostacks. Biosens Bioelectron 2016; 84:64-71. [DOI: 10.1016/j.bios.2015.11.042] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Revised: 11/06/2015] [Accepted: 11/14/2015] [Indexed: 12/30/2022]
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40
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Roushani M, Shahdost-Fard F. Covalent attachment of aptamer onto nanocomposite as a high performance electrochemical sensing platform: Fabrication of an ultra-sensitive ibuprofen electrochemical aptasensor. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 68:128-135. [PMID: 27524004 DOI: 10.1016/j.msec.2016.05.099] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Revised: 05/04/2016] [Accepted: 05/23/2016] [Indexed: 11/18/2022]
Abstract
In the present study, we report a selective electrochemical aptasensor for the ultrasensitive detection of an anti-inflammatory drug, ibuprofen (IBP). The proposed system was achieved by the modification of a glassy carbon electrode (GCE) with multiwalled carbon nanotubes/ionic liquid/chitosan (MWCNTs/IL/Chit) nanocomposite and the covalent immobilization of the IBP specific aptamer (Apt) onto the modified electrode surface followed by methylene blue (MB) intercalated onto the Apt as the electrochemical redox marker. Upon the incubation of the IBP as a target in the proposed aptasensor, the peak current of MB decreases due to the formation of the Apt-IBP complex and the displacement of MB from the immobilized Apt onto the modified electrode surface. The nanocomposite not only increases the electrode surface area and accelerate the electron transfer kinetics but also it provides a highly stable matrix to enhance the loading amount of the Apt DNA sequence. Through differential pulse voltammetry (DPV) experiments, it was found that the proposed aptasensor could detect the IBP with a linear range (70pM up to 6μM) and the detection limit (LOD) as low as 20pM. The results showed that the aptasensor had good sensitivity, stability, reproducibility, and specificity to detect the IBP. The proposed aptasensor was successfully applied for measuring the IBP concentration in real samples. Based on our experiments we can say that the present method proposes new horizons for the development of other aptasensors for diagnostic application in biosensing.
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41
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Topolovsek P, Cmok L, Gadermaier C, Borovsak M, Kovac J, Mrzel A. Thiol click chemistry on gold-decorated MoS2: elastomer composites and structural phase transitions. NANOSCALE 2016; 8:10016-10020. [PMID: 27142420 DOI: 10.1039/c6nr01490a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We show that gold decorated MoS2 flakes are amenable to thiol chemistry by blending them with a cross-linkable thiolated polysiloxane (PMMS). PMMS prevents restacking of dispersed MoS2 when transforming the metallic to the semiconducting phase. Cross-linking PMMS yields an elastomer of good optical quality, containing individual, mostly single-layer MoS2 flakes.
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Affiliation(s)
- Peter Topolovsek
- Department of Complex Matter, Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia.
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42
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Saxena U, Das A. Nanomaterials towards fabrication of cholesterol biosensors: Key roles and design approaches. Biosens Bioelectron 2016; 75:196-205. [DOI: 10.1016/j.bios.2015.08.042] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Revised: 08/19/2015] [Accepted: 08/20/2015] [Indexed: 02/07/2023]
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43
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Wu S, Wang Y, Mao H, Wang C, Xia L, Zhang Y, Ge H, Song XM. Direct electrochemistry of cholesterol oxidase and biosensing of cholesterol based on PSS/polymeric ionic liquid–graphene nanocomposite. RSC Adv 2016. [DOI: 10.1039/c6ra06073k] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this work, a new biosensor based on PSS/polymeric ionic liquids–graphene nanocomposite with excellent conductivity, favourable biocompatibility and good film-forming properties was constructed to detect cholesterol.
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Affiliation(s)
- Shuyao Wu
- Liaoning Key Laboratory of Green Synthesis and Preparative Chemistry of Advanced Materials
- College of Chemistry
- Liaoning University
- Shenyang 110036
- China
| | - Yuxiang Wang
- Liaoning Key Laboratory of Green Synthesis and Preparative Chemistry of Advanced Materials
- College of Chemistry
- Liaoning University
- Shenyang 110036
- China
| | - Hui Mao
- Liaoning Key Laboratory of Green Synthesis and Preparative Chemistry of Advanced Materials
- College of Chemistry
- Liaoning University
- Shenyang 110036
- China
| | - Chong Wang
- Liaoning Key Laboratory of Green Synthesis and Preparative Chemistry of Advanced Materials
- College of Chemistry
- Liaoning University
- Shenyang 110036
- China
| | - Lixin Xia
- College of Chemistry
- Liaoning University
- Shenyang 110036
- China
| | - Yu Zhang
- Liaoning Key Laboratory of Green Synthesis and Preparative Chemistry of Advanced Materials
- College of Chemistry
- Liaoning University
- Shenyang 110036
- China
| | - Hao Ge
- Liaoning Key Laboratory of Green Synthesis and Preparative Chemistry of Advanced Materials
- College of Chemistry
- Liaoning University
- Shenyang 110036
- China
| | - Xi-Ming Song
- Liaoning Key Laboratory of Green Synthesis and Preparative Chemistry of Advanced Materials
- College of Chemistry
- Liaoning University
- Shenyang 110036
- China
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44
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Bahadır EB, Sezgintürk MK. Label-free, ITO-based immunosensor for the detection of a cancer biomarker: Receptor for Activated C Kinase 1. Analyst 2016; 141:5618-26. [DOI: 10.1039/c6an00694a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new, quite sensitive disposable immunosensor, based on the anti-RACK1 antibody, was developed for the determination of Receptor for Activated C Kinase 1 (RACK1) for the first time.
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Affiliation(s)
- E. B. Bahadır
- Namık Kemal University
- Scientific and Technological Research Center
- Tekirdağ
- Turkey
| | - M. K. Sezgintürk
- Namık Kemal University
- Faculty of Science
- Chemistry Department
- Biochemistry Division
- Tekirdağ
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45
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Affiliation(s)
- Wen Zhou
- College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Molecular Recognition and Biosensing, and Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, 94 Weijin Road, Tianjin 300071, China
| | - Xia Gao
- College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Molecular Recognition and Biosensing, and Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, 94 Weijin Road, Tianjin 300071, China
| | - Dingbin Liu
- College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology, Tianjin Key Laboratory of Molecular Recognition and Biosensing, and Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, 94 Weijin Road, Tianjin 300071, China
| | - Xiaoyuan Chen
- Laboratory of Molecular Imaging and Nanomedicine (LOMIN), National Institute of Biomedical Imaging and Bioengineering (NIBIB), National Institutes of Health (NIH), Bethesda, Maryland 20892, United States
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46
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Ge D, Lee HK. Polypropylene membrane coated with carbon nanotubes functionalized with chitosan: Application in the microextraction of polychlorinated biphenyls and polybrominated diphenyl ethers from environmental water samples. J Chromatogr A 2015. [DOI: 10.1016/j.chroma.2015.07.029] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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47
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Guo W, Sun N, Qin X, Pei M, Wang L. A novel electrochemical aptasensor for ultrasensitive detection of kanamycin based on MWCNTs-HMIMPF6 and nanoporous PtTi alloy. Biosens Bioelectron 2015. [PMID: 26208174 DOI: 10.1016/j.bios.2015.06.081] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
A novel aptasensor based on a novel composite film consisting of multi-walled carbon nanotubes (MWCNTs), ionic liquid (IL) of 1-hexyl-3-methylimidazolium hexafluorophosphate (HMIMPF6), and nanoporous PtTi (NP-PtTi) alloy was constructed for ultrasensitive detection of kanamycin. The NP-PtTi alloy was successfully fabricated by a simple dealloying of PtTiAl source alloy in HCl solution. The NP-PtTi alloy has uniform interconnected network structure with specific surface area and was used to immobilize aptamer. After modified with the composite material, current signal was amplified obviously, which attributed to the larger specific surface area and excellent electrical conductivity of NP-PtTi and MWCNTs. A number of factors affecting the activity of the aptasensor have been discussed and optimized. Under the optimized conditions, the proposed aptasensor provided a linear range of 0.05-100 ng mL(-1) with a low detection limit of 3.7 pg mL(-1). This aptasensor displayed high sensitivity, stability and reproducibility. In addition, the as-prepared aptasensor was successfully used for the determination of kanamycin in a real sample.
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Affiliation(s)
- Wenjuan Guo
- Shandong Provincial Key Laboratory of Chemical Sensing & Analysis, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
| | - Na Sun
- Environmental Protection Monitoring Station, Jining 272045, China
| | - Xiaoli Qin
- Shandong Provincial Key Laboratory of Chemical Sensing & Analysis, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
| | - Meishan Pei
- Shandong Provincial Key Laboratory of Chemical Sensing & Analysis, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China.
| | - Luyan Wang
- Shandong Provincial Key Laboratory of Chemical Sensing & Analysis, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China
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48
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Du ZJ, Luo X, Weaver C, Cui XT. Poly (3, 4-ethylenedioxythiophene)-ionic liquid coating improves neural recording and stimulation functionality of MEAs. JOURNAL OF MATERIALS CHEMISTRY. C 2015; 3:6515-6524. [PMID: 26491540 PMCID: PMC4610193 DOI: 10.1039/c5tc00145e] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
In vivo multi-electrode arrays (MEAs) can sense electrical signals from a small set of neurons or modulate neural activity through micro-stimulation. Electrode's geometric surface area (GSA) and impedance are important for both unit recording and neural stimulation. Smaller GSA is preferred due to enhanced selectivity of neural signal, but it tends to increase electrode impedance. Higher impedance leads to increased electrical noise and signal loss in single unit neural recording. It also yields a smaller charge injection window for safe neural stimulation. To address these issues, poly (3, 4-ethylenedioxythiophene) - ionic liquid (PEDOT-IL) conducting polymers were electrochemically polymerized on the surface of the microelectrodes. The PEDOT-IL coating reduced the electrode impedance modulus by over 35 times at 1 kHz. It also exhibited compelling nanostructure in surface morphology and significant impedance reduction in other physiologically relevant range (100Hz-1000Hz). PEDOT-IL coated electrodes exhibited a Charge Storage Capacity (CSC) that was about 20 times larger than that of bare electrodes. The neural recording performance of PEDOT-IL coated electrodes was also compared with uncoated electrodes and PEDOT-poly (styrenesulfonate) (PSS) coated electrodes in rat barrel cortex (SI). Spontaneous neural activity and sensory evoked neural response were utilized for characterizing the electrode performance. The PEDOT-IL electrodes exhibited a higher unit yield and signal-to-noise ratio (SNR) in vivo. The local field potential recording was benefited from the low impedance PEDOT-IL coating in noise and artifact reduction as well. Moreover, cell culture on PEDOT-IL coating demonstrated that the material is safe for neural tissue and reduces astrocyte fouling. Taken together, PEDOT-IL coating has the potential to benefit neural recording and stimulation electrodes, especially when integrated with novel small GSA electrode arrays designed for high recording density, minimal insertion damage and alleviated tissue reaction.
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Affiliation(s)
- Zhanhong Jeff Du
- Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA
- Center for Neural Basis of Cognition, University of Pittsburgh, Pittsburgh, PA, USA
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, USA
| | - Xiliang Luo
- College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, China
| | - Cassandra Weaver
- Bioengineering Department, University of California at San Diego, La Jolla, CA, USA
| | - Xinyan Tracy Cui
- Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA
- Center for Neural Basis of Cognition, University of Pittsburgh, Pittsburgh, PA, USA
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, PA, USA
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49
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A novel ultrasensitive phosphate amperometric nanobiosensor based on the integration of pyruvate oxidase with highly ordered gold nanowires array. Biosens Bioelectron 2015; 71:278-285. [PMID: 25913449 DOI: 10.1016/j.bios.2015.04.026] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 04/11/2015] [Accepted: 04/11/2015] [Indexed: 10/23/2022]
Abstract
A novel phosphate amperometric nanobiosensor, based on an intimate integration of pyruvate oxidase (PyOx) and its cofactors, thiamine pyrophosphate (TPP) and flavin adenine dinucleotide (FAD), with a highly ordered gold nanowires array (AuNWA) has been developed. The successful integration of PyOx and the co-factors, via crosslinking with bovine serum albumin (BSA) and glutaraldehyde (GLA), onto the AuNWA was confirmed by cyclic voltammetry and amperometry. The resulting nanobiosensor achieved a detection limit of 0.1 µM, a linear concentration range of 12.5-1000 µM, and a sensitivity of 140.3 µA mM(-1)cm(-2). Notably, the incorporation of the AuNWA reduced the required PyOx concentration by 70-120 fold and the presence of common interferants, such as chloride, sulfate, fluoride, nitrite and nitrate ions did not interfere with phosphate detection. Furthermore, the nanobiosensor demonstrated a very high stability with repeated use over two weeks and was successfully used for the determination of phosphate in water samples with an average recovery of 96.6 ± 4.9%.
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50
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Julkapli NM, Bagheri S, Sapuan SM. Multifunctionalized Carbon Nanotubes Polymer Composites: Properties and Applications. ADVANCED STRUCTURED MATERIALS 2015. [DOI: 10.1007/978-81-322-2470-9_6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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