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Wu M, Li L, Yu R, Zhang Z, Zhu B, Lin J, Zhou L, Su B. Tailored diffusion limiting membrane for microneedle glucose sensors with wide linear range. Talanta 2024; 273:125933. [PMID: 38503127 DOI: 10.1016/j.talanta.2024.125933] [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: 01/23/2024] [Revised: 02/20/2024] [Accepted: 03/14/2024] [Indexed: 03/21/2024]
Abstract
Continuous glucose monitoring is very important to daily blood glucose control in diabetic patients, but its accuracy is limited by the narrow linear range of the response of biosensor to the glucose concentration because of the oxygen starvation in tissue and the limited maximum conversion rate of glucose oxidase. In this work, a biocompatible diffusion limiting membrane based on two medical-grade polyurethanes is developed via blending modification to restrict the diffusion flux of glucose to match the oxygen concentration and the maximum conversion rate. The expansiveness of the linear range for the nanomaterials-modified electrode in the glucose biosensor can be achieved through the regulation of two polyurethanes, the solvent, and the thickness of the membrane. In addition, the mass transport of hydrogen peroxide and interfering substances is also limited of the membrane. The in vitro experiments demonstrated that the membrane-modified microneedle biosensor exhibited a rapid response to the concentration variation of glucose, a wide linear range that is sufficient to cover the blood concentration of healthy and diabetic people, the ability to resist the oxygen concentration fluctuation and interfering substances, good reproducibility and long-term stability. The custom wearable electrochemical system, possessing these characteristics, has been proven to accurately monitor the blood concentration in a living rat in real time. This demonstrates a significant potential for application in both daily and clinical blood glucose monitoring.
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Affiliation(s)
- Minfang Wu
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China; Internet of Things Research Center Advanced Institute of Information Technology, Peking University, Hangzhou, 310058, China
| | - Liang Li
- Internet of Things Research Center Advanced Institute of Information Technology, Peking University, Hangzhou, 310058, China
| | - Rongying Yu
- Internet of Things Research Center Advanced Institute of Information Technology, Peking University, Hangzhou, 310058, China
| | - Zebo Zhang
- Internet of Things Research Center Advanced Institute of Information Technology, Peking University, Hangzhou, 310058, China
| | - Boyu Zhu
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
| | - Junshu Lin
- Internet of Things Research Center Advanced Institute of Information Technology, Peking University, Hangzhou, 310058, China
| | - Lin Zhou
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China
| | - Bin Su
- Department of Chemistry, Zhejiang University, Hangzhou, 310058, China.
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Madden J, Barrett C, Laffir FR, Thompson M, Galvin P, O’ Riordan A. On-Chip Glucose Detection Based on Glucose Oxidase Immobilized on a Platinum-Modified, Gold Microband Electrode. BIOSENSORS-BASEL 2021; 11:bios11080249. [PMID: 34436051 PMCID: PMC8392376 DOI: 10.3390/bios11080249] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 07/16/2021] [Accepted: 07/19/2021] [Indexed: 01/07/2023]
Abstract
We report the microfabrication and characterization of gold microband electrodes on silicon using standard microfabrication methods, i.e., lithography and etching techniques. A two-step electrodeposition process was carried out using the on-chip platinum reference and gold counter electrodes, thus incorporating glucose oxidase onto a platinum-modified, gold microband electrode with an o-phenylenediamine and ß-cyclodextrin mixture. The as-fabricated electrodes were studied using optical microscopy, scanning electron microscopy, and atomic force microscopy. The two-step electrodeposition process was conducted in low sample volumes (50 µL) of both solutions required for biosensor construction. Cyclic voltammetry and electrochemical impedance spectroscopy were utilised for electrochemical characterization at each stage of the deposition process. The enzymatic-based microband biosensor demonstrated a linear response to glucose from 2.5-15 mM, using both linear sweep voltammetry and chronoamperometric measurements in buffer-based solutions. The biosensor performance was examined in 30 µL volumes of fetal bovine serum. Whilst a reduction in the sensor sensitivity was evident within 100% serum samples (compared to buffer media), the sensor demonstrated linear glucose detection with increasing glucose concentrations (5-17 mM).
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Affiliation(s)
- Julia Madden
- Tyndall National Institute, University College Cork, T12 R5CP Cork, Ireland; (C.B.); (M.T.); (P.G.)
- Correspondence: (J.M.); (A.O.R.)
| | - Colm Barrett
- Tyndall National Institute, University College Cork, T12 R5CP Cork, Ireland; (C.B.); (M.T.); (P.G.)
| | - Fathima R. Laffir
- Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland;
| | - Michael Thompson
- Tyndall National Institute, University College Cork, T12 R5CP Cork, Ireland; (C.B.); (M.T.); (P.G.)
- Department of Chemistry, University of Toronto, Toronto, ON M5S 3H6, Canada
| | - Paul Galvin
- Tyndall National Institute, University College Cork, T12 R5CP Cork, Ireland; (C.B.); (M.T.); (P.G.)
| | - Alan O’ Riordan
- Tyndall National Institute, University College Cork, T12 R5CP Cork, Ireland; (C.B.); (M.T.); (P.G.)
- Correspondence: (J.M.); (A.O.R.)
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Kaushik S, Thungon PD, Goswami P. Silk Fibroin: An Emerging Biocompatible Material for Application of Enzymes and Whole Cells in Bioelectronics and Bioanalytical Sciences. ACS Biomater Sci Eng 2020; 6:4337-4355. [PMID: 33455178 DOI: 10.1021/acsbiomaterials.9b01971] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Enzymes and whole cells serve as the active biological entities in a myriad of applications including bioprocesses, bioanalytics, and bioelectronics. Conserving the natural activity of these functional biological entities during their prolonged use is one of the major goals for validating their practical applications. Silk fibroin (SF) has emerged as a biocompatible material to interface with enzymes as well as whole cells. These biomaterials can be tailored both physically and chemically to create excellent scaffolds of different forms such as fibers, films, and powder for immobilization and stabilization of enzymes. The secondary structures of the SF-protein can be attuned to generate hydrophobic/hydrophilic pockets suitable to create the biocompatible microenvironments. The fibrous nature of the SF protein with a dominant hydrophobic property may also serve as an excellent support for promoting cellular adhesion and growth. This review compiles and discusses the recent literature on the application of SF as a biocompatible material at the interface of enzymes and cells in various fields, including the emerging area of bioelectronics and bioanalytical sciences.
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Affiliation(s)
- Sharbani Kaushik
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43201, United States
| | - Phurpa Dema Thungon
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Pranab Goswami
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
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Zhao Y, Kankala RK, Wang SB, Chen AZ. Multi-Organs-on-Chips: Towards Long-Term Biomedical Investigations. Molecules 2019; 24:E675. [PMID: 30769788 PMCID: PMC6412790 DOI: 10.3390/molecules24040675] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Revised: 02/06/2019] [Accepted: 02/11/2019] [Indexed: 12/12/2022] Open
Abstract
With advantageous features such as minimizing the cost, time, and sample size requirements, organ-on-a-chip (OOC) systems have garnered enormous interest from researchers for their ability for real-time monitoring of physical parameters by mimicking the in vivo microenvironment and the precise responses of xenobiotics, i.e., drug efficacy and toxicity over conventional two-dimensional (2D) and three-dimensional (3D) cell cultures, as well as animal models. Recent advancements of OOC systems have evidenced the fabrication of 'multi-organ-on-chip' (MOC) models, which connect separated organ chambers together to resemble an ideal pharmacokinetic and pharmacodynamic (PK-PD) model for monitoring the complex interactions between multiple organs and the resultant dynamic responses of multiple organs to pharmaceutical compounds. Numerous varieties of MOC systems have been proposed, mainly focusing on the construction of these multi-organ models, while there are only few studies on how to realize continual, automated, and stable testing, which still remains a significant challenge in the development process of MOCs. Herein, this review emphasizes the recent advancements in realizing long-term testing of MOCs to promote their capability for real-time monitoring of multi-organ interactions and chronic cellular reactions more accurately and steadily over the available chip models. Efforts in this field are still ongoing for better performance in the assessment of preclinical attributes for a new chemical entity. Further, we give a brief overview on the various biomedical applications of long-term testing in MOCs, including several proposed applications and their potential utilization in the future. Finally, we summarize with perspectives.
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Affiliation(s)
- Yi Zhao
- Institute of Biomaterials and Tissue Engineering, Huaqiao University, Xiamen 361021, China.
- Fujian Provincial Key Laboratory of Biochemical Technology (Huaqiao University), Xiamen 361021, China.
| | - Ranjith Kumar Kankala
- Institute of Biomaterials and Tissue Engineering, Huaqiao University, Xiamen 361021, China.
- Fujian Provincial Key Laboratory of Biochemical Technology (Huaqiao University), Xiamen 361021, China.
| | - Shi-Bin Wang
- Institute of Biomaterials and Tissue Engineering, Huaqiao University, Xiamen 361021, China.
- Fujian Provincial Key Laboratory of Biochemical Technology (Huaqiao University), Xiamen 361021, China.
| | - Ai-Zheng Chen
- Institute of Biomaterials and Tissue Engineering, Huaqiao University, Xiamen 361021, China.
- Fujian Provincial Key Laboratory of Biochemical Technology (Huaqiao University), Xiamen 361021, China.
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Salih FE, Oularbi L, Halim E, Elbasri M, Ouarzane A, El Rhazi M. Conducting Polymer/Ionic Liquid Composite Modified Carbon Paste Electrode for the Determination of Carbaryl in Real Samples. ELECTROANAL 2018. [DOI: 10.1002/elan.201800152] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Fatima Ezzahra Salih
- Laboratory of Materials, Membranes and Environment, Faculty of sciences and Technologies -BP 146 Mohammedia 20650; University Hassan II of Casablanca; Morocco
| | - Larbi Oularbi
- Laboratory of Materials, Membranes and Environment, Faculty of sciences and Technologies -BP 146 Mohammedia 20650; University Hassan II of Casablanca; Morocco
| | - El Halim
- Laboratory of Materials, Membranes and Environment, Faculty of sciences and Technologies -BP 146 Mohammedia 20650; University Hassan II of Casablanca; Morocco
| | - Miloud Elbasri
- Laboratory of Materials, Membranes and Environment, Faculty of sciences and Technologies -BP 146 Mohammedia 20650; University Hassan II of Casablanca; Morocco
| | - Aicha Ouarzane
- Laboratory of Materials, Membranes and Environment, Faculty of sciences and Technologies -BP 146 Mohammedia 20650; University Hassan II of Casablanca; Morocco
| | - Mama El Rhazi
- Laboratory of Materials, Membranes and Environment, Faculty of sciences and Technologies -BP 146 Mohammedia 20650; University Hassan II of Casablanca; Morocco
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Hu C, Shi Y, Sun C, Liang S, Bao S, Pang M. Facile preparation of ion-doped poly(p-phenylenediamine) nanoparticles for photothermal therapy. Chem Commun (Camb) 2018; 54:4862-4865. [DOI: 10.1039/c8cc01100a] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Ion-doped poly(p-phenylenediamine) nanoparticles were synthesized and used as a photothermal agent for photothermal therapy for the first time.
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Affiliation(s)
- Chunling Hu
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
- University of the Chinese Academy of Sciences
| | - Yanshu Shi
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
- University of the Chinese Academy of Sciences
| | - Chunqiang Sun
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
| | - Shuang Liang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
| | - Shouxin Bao
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
| | - Maolin Pang
- State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- P. R. China
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7
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Ju HX, Zhuang QK, Long YT. The Preface. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.11.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Sensing of Salivary Glucose Using Nano-Structured Biosensors. BIOSENSORS-BASEL 2016; 6:bios6010010. [PMID: 26999233 PMCID: PMC4810402 DOI: 10.3390/bios6010010] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2016] [Revised: 03/05/2016] [Accepted: 03/14/2016] [Indexed: 11/22/2022]
Abstract
The anxiety and pain associated with frequent finger pricking has always been troublesome for diabetics measuring blood glucose (BG) in their daily lives. For this reason, a reliable glucose monitoring system that allows noninvasive measurements is highly desirable. Our main objective is to develop a biosensor that can detect low-level glucose in saliva (physiological range 0.5–20 mg/dL). Salivary glucose (SG) sensors were built using a layer-by-layer self-assembly of single-walled carbon nanotubes, chitosan, gold nanoparticles, and glucose oxidase onto a screen-printed platinum electrode. An electrochemical method was utilized for the quantitative detection of glucose in both buffer solution and saliva samples. A standard spectrophotometric technique was used as a reference method to validate the glucose content of each sample. The disposable glucose sensors have a detection limit of 0.41 mg/dL, a sensitivity of 0.24 μA·s·dL·mg−1, a linear range of 0.5–20 mg/dL in buffer solution, and a response time of 30 s. A study of 10 healthy subjects was conducted, and SG levels between 1.1 to 10.1 mg/dL were successfully detected. The results revealed that the noninvasive SG monitoring could be an alternative for diabetes self-management at home. This paper is not intended to replace regular BG tests, but to study SG itself as an indicator for the quality of diabetes care. It can potentially help patients control and monitor their health conditions, enabling them to comply with prescribed treatments for diabetes.
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9
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Microfluidic Organ/Body-on-a-Chip Devices at the Convergence of Biology and Microengineering. SENSORS 2015; 15:31142-70. [PMID: 26690442 PMCID: PMC4721768 DOI: 10.3390/s151229848] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 11/16/2015] [Accepted: 12/04/2015] [Indexed: 12/24/2022]
Abstract
Recent advances in biomedical technologies are mostly related to the convergence of biology with microengineering. For instance, microfluidic devices are now commonly found in most research centers, clinics and hospitals, contributing to more accurate studies and therapies as powerful tools for drug delivery, monitoring of specific analytes, and medical diagnostics. Most remarkably, integration of cellularized constructs within microengineered platforms has enabled the recapitulation of the physiological and pathological conditions of complex tissues and organs. The so-called “organ-on-a-chip” technology, which represents a new avenue in the field of advanced in vitro models, with the potential to revolutionize current approaches to drug screening and toxicology studies. This review aims to highlight recent advances of microfluidic-based devices towards a body-on-a-chip concept, exploring their technology and broad applications in the biomedical field.
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Khan M, Park SY. Glucose biosensor based on GOx/HRP bienzyme at liquid-crystal/aqueous interface. J Colloid Interface Sci 2015. [PMID: 26196711 DOI: 10.1016/j.jcis.2015.07.010] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Glucose oxidase (GOx) and horseradish peroxidase (HRP) were co-immobilized to the polyacrylicacid block of a poly(acrylicacid-b-4-cyanobiphenyl-4'-undecylacrylate) (PAA-b-LCP) copolymer in water. PAA-b-LCP was strongly anchored by the LCP block in 4-cyano-4'-pentylbiphenyl (5CB) which was contained in a transmission electron microscope (TEM) grid for glucose detection. The optimal conditions for the performance of the TEM grid glucose biosensor were studied in terms of the activity and stability of the immobilized enzymes. Glucose in water was detected by the 5CB changing from a planar to a homeotropic orientation, as observed through a polarized optical microscope. The TEM biosensor detected glucose concentrations at ⩾0.02 mM, with an optimal GOx/HRP molar ratio of 3/1. This glucose biosensor has characteristics of enzyme sensitivity and stability, reusability, the ease and selective glucose detection which may provide a new way of detecting glucose.
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Affiliation(s)
- Mashooq Khan
- Department of Polymer Science and Engineering, School of Applied Chemical Engineering, #1370 Sangyuk-dong, Buk-gu, Daegu 702-701, Republic of Korea
| | - Soo-Young Park
- Department of Polymer Science and Engineering, School of Applied Chemical Engineering, #1370 Sangyuk-dong, Buk-gu, Daegu 702-701, Republic of Korea.
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Khan M, Park SY. Liquid crystal-based glucose biosensor functionalized with mixed PAA and QP4VP brushes. Biosens Bioelectron 2015; 68:404-412. [DOI: 10.1016/j.bios.2015.01.023] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Accepted: 01/09/2015] [Indexed: 10/24/2022]
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Calia G, Monti P, Marceddu S, Dettori MA, Fabbri D, Jaoua S, O'Neill RD, Serra PA, Delogu G, Migheli Q. Electropolymerized phenol derivatives as permselective polymers for biosensor applications. Analyst 2015; 140:3607-15. [PMID: 25857616 DOI: 10.1039/c5an00363f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Amperometric biosensors are often coated with a polymeric permselective film to avoid electroactive interference by reducing agents present in the target medium. Phenylenediamine and phenol monomers are commonly used to form these permselective films in the design of microsensors and biosensors. This paper aims to evaluate the permselectivity, stability and lifetime of polymers electrosynthesized using either constant potential amperometry (CPA) or cyclic voltammetry (CV) from naturally occurring phenylpropanoids in monomeric and dimeric forms (eugenol, isoeugenol, dehydrodieugenol and magnolol). Sensors were characterized by scanning electron microscopy and permselectivity analysis. Magnolol formed an electro-deposited polymer with a more defined three-dimensional texture in comparison with the other films. The phenol-derived films showed different permselectivity towards H2O2 over ascorbic acid and dopamine, likely to be related to the thickness and compactness of the polymer. The CV-derived films had a better permselectivity compared to the CPA-corresponding polymers. Based on these results, the permselectivity, stability and lifetime of a biosensor for glucose were studied when a magnolol coating was electro-deposited. The structural principles governing the permselectivity of the magnolol-derived film are suggested to be mainly related to the conformational flexibility of this monomer. Newly designed biosensors, coated with electropolymerized natural phenol derivatives, may represent promising analytical devices for different application fields.
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Affiliation(s)
- Giammario Calia
- Dipartimento di Agraria and Unità di Ricerca Istituto Nazionale di Biostrutture e Biosistemi, Università degli Studi di Sassari, Viale Italia 39, I-07100 Sassari, Italy
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Fortin N, Klok HA. Glucose monitoring using a polymer brush modified polypropylene hollow fiber-based hydraulic flow sensor. ACS APPLIED MATERIALS & INTERFACES 2015; 7:4631-40. [PMID: 25675859 DOI: 10.1021/am507927w] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Tight regulation of blood glucose levels of diabetic patients requires durable and robust continuous glucose sensing schemes. This manuscript reports the fabrication of ultrathin, phenylboronic acid (PBA) functionalized polymer brushes that swell upon glucose binding and which were integrated as the sensing interface in a new polypropylene hollow fiber (PPHF)-based hydraulic flow glucose sensor prototype. The polymer brushes were prepared via surface-initiated atom transfer radical polymerization of sodium methacrylate followed by postpolymerization modification with 3-aminophenyl boronic acid. In a first series of experiments, the glucose-response of PBA-functionalized poly(methacrylic acid) (PMAA) brushes grafted from planar silicon surfaces was investigated by quartz crystal microbalance with dissipation (QCM-D) and atomic force microscopy (AFM) experiments. The QCM-D experiments revealed a more or less linear change of the frequency shift for glucose concentrations up to ∼10 mM and demonstrated that glucose binding was completely reversible for up to seven switching cycles. The AFM experiments indicated that glucose binding was accompanied by an increase in the film thickness of the PBA functionalized PMAA brushes. The PBA functionalized PMAA brushes were subsequently grafted from the surface of PPHF membranes. The hydraulic permeability of these porous fibers depends on the thickness and swelling of the PMAA brush coating. PBA functionalized brush-coated PPHFs showed a decrease in flux upon exposure to glucose, which is consistent with swelling of the brush coating. Because they avoid the use of enzymes and do not rely on an electrochemical transduction scheme, these PPHF-based hydraulic flow sensors could represent an interesting alternative class of continuous glucose sensors.
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Affiliation(s)
- Nicolas Fortin
- Institut des Matériaux and Institut des Sciences et Ingénierie Chimiques, Laboratoire des Polymères, École Polytechnique Fédérale de Lausanne (EPFL) , Bâtiment MXD, Station 12, CH-1015 Lausanne, Switzerland
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15
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Britz D, Strutwolf J. Digital simulation of chronoamperometry at a disk electrode under a flat polymer film containing an enzyme. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2014.11.117] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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16
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Magdziarz P, Bober P, Trchová M, Morávková Z, Bláha M, Prokeš J, Stejskal J. Conducting composites prepared by the reduction of silver ions with poly(p-phenylenediamine). POLYM INT 2014. [DOI: 10.1002/pi.4817] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Przemysław Magdziarz
- Institute of Macromolecular Chemistry; Academy of Sciences of the Czech Republic; 162 06 Prague 6 Czech Republic
| | - Patrycja Bober
- Institute of Macromolecular Chemistry; Academy of Sciences of the Czech Republic; 162 06 Prague 6 Czech Republic
| | - Miroslava Trchová
- Institute of Macromolecular Chemistry; Academy of Sciences of the Czech Republic; 162 06 Prague 6 Czech Republic
| | - Zuzana Morávková
- Institute of Macromolecular Chemistry; Academy of Sciences of the Czech Republic; 162 06 Prague 6 Czech Republic
| | - Michal Bláha
- Institute of Macromolecular Chemistry; Academy of Sciences of the Czech Republic; 162 06 Prague 6 Czech Republic
| | - Jan Prokeš
- Faculty of Mathematics and Physics; Charles University in Prague; 182 00 Prague 8 Czech Republic
| | - Jaroslav Stejskal
- Institute of Macromolecular Chemistry; Academy of Sciences of the Czech Republic; 162 06 Prague 6 Czech Republic
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Baghayeri M, Nazarzadeh Zare E, Hasanzadeh R. Facile synthesis of PSMA-g-3ABA/MWCNTs nanocomposite as a substrate for hemoglobin immobilization: Application to catalysis of H2O2. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2014; 39:213-20. [DOI: 10.1016/j.msec.2014.03.012] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 01/19/2014] [Accepted: 03/01/2014] [Indexed: 10/25/2022]
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Glucose biosensor based on immobilization of glucose oxidase in electropolymerized poly(o-phenylenediamine) film on platinum nanoparticles-polyvinylferrocenium modified electrode. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2013.12.189] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Abstract
A transmission electron microscopy (TEM) grid filled with 4-cyno-4-pentylbiphenyl (5CB) on the octadecyltrichloro silane-coated glass in an aqueous medium was developed to construct a glucose biosensor by coating poly(acrylicacid-b-4-cynobiphenyl-4-oxyundecylacrylate) (PAA-b-LCP) at the aqueous/5CB interface and immobilizing glucose oxidase (GOx) covalently to the PAA chains. The glucose was detected from a homeotropic to planar orientational transition of 5CB by polarized optical microscopy under crossed polarizers. The maximum immobilization density of the GOx, 1.3 molecules/nm(2) obtained in this TEM grid cell enabled the detection of glucose at concentrations as low as 0.02 mM with a response time of 10 s. This liquid crystal-based glucose sensor provided a linear response of birefringence of the 5CB to glucose concentrations ranging from 0.05 to 2 mM with a Michaelis-Menten constant (Km) of 0.32 mM. This new and sensitive glucose biosensor has the merits of low production cost and easy detection through the naked eye and might be useful for prescreening the glucose level in the human body.
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Affiliation(s)
- Mashooq Khan
- Department of Polymer Science & Engineering, Kyungpook National University , #1370 Sangyuk-dong, Buk-gu, Daegu 702-701, Korea
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Joshi GK, Johnson MA, Sardar R. Novel pH-responsive nanoplasmonic sensor: controlling polymer structural change to modulate localized surface plasmon resonance response. RSC Adv 2014. [DOI: 10.1039/c4ra00117f] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
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Jaidev J, Ramaprabhu S. Poly(p-phenylenediamine)/graphene nanocomposites for supercapacitor applications. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm33627h] [Citation(s) in RCA: 116] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Wu Q, Wang L, Yu H, Wang J, Chen Z. Organization of glucose-responsive systems and their properties. Chem Rev 2011; 111:7855-75. [PMID: 21902252 DOI: 10.1021/cr200027j] [Citation(s) in RCA: 231] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Qian Wu
- State Key Laboratory of Chemical Engineering, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
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23
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24
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Ćirić-Marjanović G, Marjanović B, Bober P, Rozlívková Z, Stejskal J, Trchová M, Prokeš J. The oxidative polymerization of p-phenylenediamine with silver nitrate: Toward highly conducting micro/nanostructured silver/conjugated polymer composites. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/pola.24775] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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25
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Ozyilmaz G, Ozyilmaz AT, Can F. Glucose oxidase-polypyrrole electrodes synthesized in p-toluenesulfonic acid and sodium p-toluenesulfonate. APPL BIOCHEM MICRO+ 2011. [DOI: 10.1134/s0003683811020153] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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26
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Characteristics of polysilicon wire glucose sensors with a surface modified by silica nanoparticles/γ-APTES nanocomposite. SENSORS 2011; 11:2796-808. [PMID: 22163767 PMCID: PMC3231599 DOI: 10.3390/s110302796] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2011] [Revised: 02/14/2011] [Accepted: 02/28/2011] [Indexed: 11/17/2022]
Abstract
This report investigates the sensing characteristics of polysilicon wire (PSW) glucose biosensors, including thickness characteristics and line-width effects on detection limits, linear range and interference immunity with membranes coated by micropipette/spin-coating and focus-ion-beam (FIB) processed capillary atomic-force-microscopy (C-AFM) tip scan/coating methods. The PSW surface was modified with a mixture of 3-aminopropyl-triethoxysilane (γ-APTES) and polydimethylsiloxane (PDMS)-treated hydrophobic fumed silica nanoparticles (NPs). We found that the thickness of the γ-APTES+NPs nonocomposite could be controlled well at about 22 nm with small relative standard deviation (RSD) with repeated C-AFM tip scan/coatings. The detection limit increased and linear range decreased with the line width of the PSW through the tip-coating process. Interestingly, the interference immunity ability improves as the line width increases. For a 500 nm-wide PSW, the percentage changes of the channel current density changes (ΔJ) caused by acetaminophen (AP) can be kept below 3.5% at an ultra-high AP-to-glucose concentration ratio of 600:1. Simulation results showed that the line width dependence of interference immunity was strongly correlated with the channel electrical field of the PSW biosensor.
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27
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Youssef JE, Castle JR, Engle JM, Massoud RG, Ward WK. Continuous glucose monitoring in subjects with type 1 diabetes: improvement in accuracy by correcting for background current. Diabetes Technol Ther 2010; 12:921-8. [PMID: 20879968 PMCID: PMC3000640 DOI: 10.1089/dia.2010.0020] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
BACKGROUND A cause of suboptimal accuracy in amperometric glucose sensors is the presence of a background current (current produced in the absence of glucose) that is not accounted for. We hypothesized that a mathematical correction for the estimated background current of a commercially available sensor would lead to greater accuracy compared to a situation in which we assumed the background current to be zero. We also tested whether increasing the frequency of sensor calibration would improve sensor accuracy. METHODS This report includes analysis of 20 sensor datasets from seven human subjects with type 1 diabetes. Data were divided into a training set for algorithm development and a validation set on which the algorithm was tested. A range of potential background currents was tested. RESULTS Use of the background current correction of 4 nA led to a substantial improvement in accuracy (improvement of absolute relative difference or absolute difference of 3.5-5.5 units). An increase in calibration frequency led to a modest accuracy improvement, with an optimum at every 4 h. CONCLUSIONS Compared to no correction, a correction for the estimated background current of a commercially available glucose sensor led to greater accuracy and better detection of hypoglycemia and hyperglycemia. The accuracy-optimizing scheme presented here can be implemented in real time.
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Affiliation(s)
| | | | | | | | - W. Kenneth Ward
- Oregon Health & Science University, Portland, Oregon
- Legacy Health, Portland, Oregon
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Wu YL, Hsu PY, Lin JJ. Polysilicon wire glucose sensor highly immune to interference. Biosens Bioelectron 2010; 26:2281-6. [PMID: 21030241 DOI: 10.1016/j.bios.2010.09.052] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2010] [Revised: 09/27/2010] [Accepted: 09/28/2010] [Indexed: 10/19/2022]
Abstract
This study investigated the interference elimination ability of a glucose sensor made of polysilicon wire (PSW) with a surface modified by 3-aminopropyltriethoxysilane mixed with polydimethylsiloxane-treated hydrophobic fumed silica nanoparticles plus ultra-violet illumination (γ-APTES+NPs+UV). Glucose sensing of the PSW sensor in the presence of five common interferences such as ascorbic acid (AA), uric acid (UA), acetaminophen (AP), L-cysteine (Lys), and citric acid (CA) was performed. We found that the disturbance caused by the interferences was low for interference-to-glucose concentration ratios up to 600:1 if the PSW surface is modified with γ-APTES+NPs+UV. The outstanding interference immunity of this PSW glucose sensor is believed to be mainly due to the fact that it is a dry-type sensor and the extremely low leakage of the γ-APTES+NPs membrane which allows the PSW to show three orders of magnitude lower leakage current than with the γ-APTES membrane only. In addition to its excellent interference immunity, the PSW glucose sensor with a line width of 100 nm also exhibits a wide linear detection range, an ultra-high sensitivity, an ultra low detection limit, and it can be reused more than a thousand times without much sensitivity degradation.
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Affiliation(s)
- You-Lin Wu
- Department of Electrical Engineering, National Chi Nan University, Puli, Nantou, Taiwan, ROC
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29
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Zhou DM, Dai YQ, Shiu KK. Poly(phenylenediamine) film for the construction of glucose biosensors based on platinized glassy carbon electrode. J APPL ELECTROCHEM 2010. [DOI: 10.1007/s10800-010-0179-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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30
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Hébert M, Rochefort D. Electrode passivation by reaction products of the electrochemical and enzymatic oxidation of p-phenylenediamine. Electrochim Acta 2008. [DOI: 10.1016/j.electacta.2008.02.031] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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31
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Guo S, Wang E. Simple electrochemical route to nanofiber junctions and dendrites of conducting polymer. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:2128-2132. [PMID: 18225936 DOI: 10.1021/la7032862] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We first report a simple and rapid electrochemical approach to synthesize novel nanofiber junctions and dendrites of conducting poly(o-phenylenediamine) without any surfactant or template. Through controlling some parameters such as the time and potential of electrodeposition and concentration of the reactant, nanofiber junctions and dendrites of conducting polymer can be easily obtained on the solid surface. This research provides a new method to synthesize complicated nanofiber junctions and dendrites on the conducting surface, which may find potential applications in nanodevice and electrochemical sensors.
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Affiliation(s)
- Shaojun Guo
- Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, People's Republic of China
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32
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Sun X, Hagner M. Mixing aqueous ferric chloride and O-phenylenediamine solutions at room temperature: a fast, economical route to ultralong microfibrils of assemblied O-phenylenediamine dimers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:10441-4. [PMID: 17854208 DOI: 10.1021/la701378y] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
The direct mix of aqueous ferric chloride and o-phenylenediamine (OPD) solutions at room temperature has been demonstrated for the first time to be an effective, economic, and fast method for preparing microfibrils on a large scale. The formation of such large microfibrils is attributed to the self-assembly of the OPD dimers generated by the oxidation of OPD monomers by ferric chloride. It is also interesting that the resulting microfibrils can be broken into shorter ones by a simple sonication process and the final length of the microfibrils obtained can be controlled by varying the sonication time. The influences of both the amount of ferric chloride and the oxidant type on the size and the morphology of the microstructures are also examined.
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Affiliation(s)
- Xuping Sun
- Fachbereich Chemie, and Fachbereich Physic, Universität Konstanz, Universitätsstrasse 10, D-78457 Konstanz, Germany.
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33
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Shi M, Peng Y, Zhou J, Liu B, Huang Y, Kong J. Multianalyte immunoassay based on insulating-controllable PoPD film at arrayed electrodes integrated on a silicon chip. Biosens Bioelectron 2007; 22:2841-7. [PMID: 17215116 DOI: 10.1016/j.bios.2006.11.023] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2006] [Revised: 11/19/2006] [Accepted: 11/21/2006] [Indexed: 10/23/2022]
Abstract
A novel, simple and label-free multianalyte immunoassay system is presented here by integrating arrayed electrodes on a silicon chip via MEMS. The chip is consisted of six Au disk electrodes, an Au counter electrode and an Ag/AgCl reference electrode. Semi-insulating poly(o-phenylenediamine) (PoPD) was utilized to co-polymerize and immobilize antibodies at the arrayed Au electrodes, and wider linear detection range was obtained than those prepared with completely insulating PoPD. Electrochemical cyclic voltammogram (CV), AC impedance spectroscopy, AFM and fluorescence microscopy were employed to characterize the system. The arrayed electrodes offered exact control of deposition position via electrochemical operation, allowing selectively immobilization of different antibodies at desired positions on a single chip. Specific recognition of antibody (Ab) to corresponding antigen (An) was quantitatively monitored by cyclic voltammograms in the presence of electrochemical redox probe, ferrocene methanol. The proposed immunoassay chips showed sensitive response to three liver fibrosis markers, hyaluronic acid (HA), collagen type IV (IV-C) and lamin (LN) at ng/mL level simultaneously and specifically in a tiny amount of volume, usually 50 microL. The results obtained via chips were well consistent with those obtained by commercial radio immunoassays (RIA).
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Affiliation(s)
- Mianhong Shi
- Chemistry Department, Fudan University, Shanghai 200433, China
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34
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Liu S, Lin B, Yang X, Zhang Q. Carbon-Nanotube-Enhanced Direct Electron-Transfer Reactivity of Hemoglobin Immobilized on Polyurethane Elastomer Film. J Phys Chem B 2007; 111:1182-8. [PMID: 17266273 DOI: 10.1021/jp065344b] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this study, we investigate the direct electron-transfer reactivity of immobilized hemoglobin (Hb) on a polyurethane elastomer (PUE) film for biosensor designs. The PUE film synthesized by an additional polymerization possesses good biocompatibility, uniformity, and conformability and is ready for protein immobilization. Electrochemical and spectroscopic measurements show that the presence of multiwalled carbon nanotubes (MWNTs) increased the protein-PUE interaction, varied polymer morphology, improved the permeability and the conductivity of the PUE film, and thus facilitated the direct electron transfer between the immobilized Hb and the conductivity surface through the conducting tunnels of MWNTs. The immobilized Hb maintains its bioactivities and displays an excellent electrochemical behavior with a formal potential of -(334 +/- 7) mV. The addition of NaNO2 leads to an increase of the electrocatalytic reduction current of nitrite at -0.7 V. This allows us to develop a nitrite sensor with a linear response range from 0.08 to 3.6 mM. The proposed method opens a way to develop biosensors by using nanostructured materials mixed with low electrical conductivity matrixes.
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Affiliation(s)
- Songqin Liu
- Department of Chemistry and Chemical Engineering, Southeast University, Nanjing 210096, People's Republic of China.
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35
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Zór K, Gáspár S, Hashimoto M, Suzuki H, Csöregi E. High Temporal Resolution Monitoring of Fermentations Using an On-Line Amperometric Flow-Through Microdetector. ELECTROANAL 2007. [DOI: 10.1002/elan.200603682] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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36
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Gómez-Caballero A, Unceta N, Goicolea M, Barrio R. Voltammetric Determination of Metamitron with an Electrogenerated Molecularly Imprinted Polymer Microsensor. ELECTROANAL 2007. [DOI: 10.1002/elan.200603731] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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37
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Dai YQ, Zhou DM, Shiu KK. Permeability and permselectivity of polyphenylenediamine films synthesized at a palladium disk electrode. Electrochim Acta 2006. [DOI: 10.1016/j.electacta.2006.05.010] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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38
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Jiang H, Sun X, Huang M, Wang Y, Li D, Dong S. Rapid self-assembly of oligo(o-phenylenediamine) into one-dimensional structures through a facile reprecipitation route. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:3358-61. [PMID: 16548601 DOI: 10.1021/la053091s] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
The self-assembly of oligo(o-phenylenediamine) (OPD) into 1-D nanostructures on a macroscopic length scale was found when they were transferred from N-methyl pyrrolidone to deionized water. Field emission scanning electron microscopy and confocal fluorescence microscopy were used to investigate the morphology of the precipitates. Results showed that large amounts of OPD 1-D supertructures could be obtained through the simple reprecipitation route, and the length of the fibers could be tuned from microscale to macroscale by adjusting the ratio of two solvents. X-ray diffraction patterns and UV-vis spectra revealed that pi-pi interactions between OPD molecules that facilitated the formation of 1-D structures became predominant when they were transferred from a good solvent to a bad one. Accordingly, a possible formation mechanism was proposed.
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Affiliation(s)
- Heqing Jiang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
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39
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Wu B, Zhang G, Zhang Y, Shuang S, Choi MMF. Measurement of glucose concentrations in human plasma using a glucose biosensor. Anal Biochem 2005; 340:181-3. [PMID: 15802146 DOI: 10.1016/j.ab.2005.01.025] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2004] [Indexed: 11/28/2022]
Affiliation(s)
- Baoli Wu
- Institute of Advanced Chemistry, School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China
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40
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Tan XC, Tian YX, Cai PX, Zou XY. Glucose biosensor based on glucose oxidase immobilized in sol-gel chitosan/silica hybrid composite film on Prussian blue modified glass carbon electrode. Anal Bioanal Chem 2005; 381:500-7. [PMID: 15657706 DOI: 10.1007/s00216-004-2956-8] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2004] [Revised: 09/27/2004] [Accepted: 11/05/2004] [Indexed: 11/27/2022]
Abstract
An improved amperometric glucose biosensor based on glucose oxidase immobilized in sol-gel chitosan/silica hybrid composite film, which was prepared from chitosan (CS) and methyltrimethoxysilane (MTOS), on the surface of Prussian blue (PB)-modified glass carbon electrode was developed. The film was characterized by FT-IR. Effects of some experimental variables such as ratio of CS to silica, buffer pH, temperature, and applied potential on the current response of the biosensor were investigated. The biosensor fabricated under optimal conditions had a linear response to glucose over the range 5.0 x 10(-5) to 2.6 x 10(-2) M with a correlation coefficient of 0.9948 and a detection limit of 8.0 x 10(-6) M based on S/N = 3. The biosensor had a fast response time of less than 10 s, a high sensitivity of 420 nA mM(-1), a long-term stability of over 60 days, and a good selectivity. The apparent Michaelis-Menten constant K(m) was found to be 3.2 x 10(-3) M. The activation energy for enzymatic reaction was calculated to be 21.9 kJ mol(-1). This method has been used to determine the glucose concentration in real human blood samples.
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Affiliation(s)
- Xue-Cai Tan
- School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, 510275, China
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41
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Wang K, Xu JJ, Sun DC, Wei H, Xia XH. Selective glucose detection based on the concept of electrochemical depletion of electroactive species in diffusion layer. Biosens Bioelectron 2005; 20:1366-72. [PMID: 15590291 DOI: 10.1016/j.bios.2004.05.009] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2004] [Revised: 05/22/2004] [Accepted: 05/31/2004] [Indexed: 10/26/2022]
Abstract
A glucose detection approach based on the concept of electrochemical depletion of electroactive species in diffusion layer was established, using scanning electrochemical microscopy (SECM). By controlling the glucose oxidase (GOD) modified electrode (substrate electrode) at a proper potential of electrochemical oxidation of interfering electroactive species, i.e., ascorbic acid (AA), an interference-free microcircumstance was formed in the diffusion layer of the substrate electrode. Consequently, we could successfully sense hydrogen peroxide generated from an enzymatic reaction by locating a Pt ultramicroelectrode (UME) (tip electrode, 5 microm in radius) into the diffusion layer of the substrate electrode. Properties of this interference-removing approach based on electrochemical depletion were systematically investigated. Results showed that the interference-removing efficiency was significantly determined by the tip-substrate distance and substrate potential. When the tip-substrate distance was 11 microm (2.2 times of the tip electrode radius) and the substrate potential was 0.5 V, nearly 90% of AA (0.5 mM) could be depleted within 30s without consumption of H2O2. Under these conditions, 0.1 mM AA showed no influence on the detection of 0.5 mM glucose. The linear range of glucose detection is 0.01-1 mM with a detection limit (DL) of 0.005 mM (correlation coefficient is 0.9948). This research will open a new way for developing selective micro-biosensors.
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Affiliation(s)
- Kang Wang
- The State Key Laboratory of Coordination Chemistry, Department of Chemistry, Institute of Analytical Science, Nanjing University, Nanjing 210093, China
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42
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Wang K, Xu JJ, Chen HY. A novel glucose biosensor based on the nanoscaled cobalt phthalocyanine–glucose oxidase biocomposite. Biosens Bioelectron 2005; 20:1388-96. [PMID: 15590294 DOI: 10.1016/j.bios.2004.06.006] [Citation(s) in RCA: 109] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2004] [Revised: 06/04/2004] [Accepted: 06/09/2004] [Indexed: 11/19/2022]
Abstract
We report on the utilization of a novel nanoscaled cobalt phthalocyanine (NanoCoPc)-glucose oxidase (GOD) biocomposite colloid to create a highly responsive glucose biosensor. The biocomposite colloid is constructed under enzyme-friendly conditions by adsorbing GOD molecules on CoPc nanoparticles via electrostatic interactions. The glucose biosensor can be easily achieved by casting the biocomposite colloid on a pyrolytic graphite electrode (PGE) without any auxiliary matter. It has been found that GOD can be firmly immobilized on PGE surface and maintain its bioactivity after conjugating with NanoCoPc. NanoCoPc displays intrinsic electrocatalytic ability to the oxidation of the product of enzymatic reaction H2O2 and shows a higher catalytic activity than that of bulk CoPc. Under optimal conditions, the biosensor shows a wide linear response to glucose in the range of 0.02-18 mM, with a fast response (5s), high sensitivity (7.71 microA cm(-2) mM(-1)), as well as good thermostability and long-term life. The detection limit was 5 microM at 3 sigma. The general interferences coexisted in blood except ascorbic acid and L-cysteine do not affect glucose determination, and further coating Nafion film on the surface of the biosensor can effectively eliminate the interference from ascorbic acid and L-cysteine. The biosensor with Nafion film has been used for the determination of glucose in serum with an acceptable accuracy.
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Affiliation(s)
- Kun Wang
- The Laboratory of Life Analytical Chemistry, Department of Chemistry, Nanjing University, 22 Hankou Road, Nanjing 210093, PR China
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43
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Ye JS, Wen Y, De?Zhang W, Cui H, Xu G, Sheu FS. Electrochemical Biosensing Platforms Using Phthalocyanine-Functionalized Carbon Nanotube Electrode. ELECTROANAL 2005. [DOI: 10.1002/elan.200403124] [Citation(s) in RCA: 94] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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44
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Dai YQ, Shiu KK. Highly Sensitive Amperometric Glucose Biosensor Based on Glassy Carbon Electrode with Copper/Palladium Coating. ELECTROANAL 2004. [DOI: 10.1002/elan.200303037] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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45
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Zhang D, Zhang K, Yao YL, Xia XH, Chen HY. Multilayer assembly of Prussian blue nanoclusters and enzyme-immobilized poly(toluidine blue) films and its application in glucose biosensor construction. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:7303-7307. [PMID: 15301519 DOI: 10.1021/la049667f] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A multilayered glucose biosensor via sequential deposition of Prussian blue (PB) nanoclusters and enzyme-immobilized poly(toluidine blue) films was constructed on a bare Au electrode using electrochemical methods. The whole configuration of the present biosensor can be considered as an integration of several independent hydrogen peroxide sensing elements. In each sensing element, the poly(toluidine blue) film functioned as both the supporting matrix for the glucose oxidase immobilization and the inhibitor for the diffusion of interferences, such as ascorbic acid and uric acid. Meanwhile, the deposited Prussian blue nanocluster layers acts as a catalyst for the electrochemical reduction of hydrogen peroxide formed from enzymatic reaction. Performance of the whole multilayer configuration can be tailored by artificially arranging the sensing elements assembled on the electrode. Under optimal conditions, the biosensors exhibit a linear relationship in the range of 1 x 10(-4) to 1 x 10(-2) mol/L with the detection limit down to 10(-5) mol/L. A rapid response for glucose could be achieved in less than 3 s. For 1 mM glucose, 0.5 mM acetaminophen, 0.2 mM uric acid, and 0.1 mM ascorbic acid have no obvious interferences (<5%) for glucose detection at an optimized detection potential. The present multilayered glucose biosensor with a high selectivity and sensitivity is promising for practical applications.
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Affiliation(s)
- Dai Zhang
- Key Laboratory of Life Analytical Chemistry, Department of Chemistry, Nanjing University, Nanjing 210093, People's Republic of China
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46
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Mitchell KM. Acetylcholine and choline amperometric enzyme sensors characterized in vitro and in vivo. Anal Chem 2004; 76:1098-106. [PMID: 14961744 DOI: 10.1021/ac034757v] [Citation(s) in RCA: 112] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Acetylcholine (ACh) and choline (Ch) are important neuroactive molecules, yet detection of these substances in vivo presents significant analytical challenges. New multienzyme amperometric biosensors are presented here with measurement of physiologically relevant levels of ACh and Ch in vivo. Poly(m-(1,3)-phenylenediamine) (pmPD) electropolymerized on a platinum iridium wire (Pt) served as a template for immobilization of enzymes. A multienzyme layer containing choline oxidase (ChOx) and ascorbic acid oxidase (AAO) for a Ch sensor or ChOx, acetylcholinesterase (AChE), and AAO for a ACh/Ch sensor was immobilized with bovine serum albumin by cross-linking with glutaraldeyhyde. The pmPD enzyme sensors displayed enhanced sensitivity, stability, and selectivity compared to the same multienzyme systems immobilized to solvent cast Nafion and cellulose acetate-modified Pt. Sensor response was linear up to 100 microM ACh or Ch. Detection limits were 0.66 +/- 0.46 microM ACh and 0.33 +/- 0.09 microM Ch, and response times were <1 s. Selectivity for Ch and ACh relative to potential interferences and pharmacological agents commonly used to examine cholinergic physiology was demonstrated. Temperature and pH dependence and the effect of storage conditions on sensor sensitivity and selectivity were determined. Exogenous and endogenous Ch and ACh were measured in the rat brain in vivo.
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Affiliation(s)
- Kim M Mitchell
- Center for Neurobiology and Immunology Research, Department of Pharmacology and Toxicology, University of Kansas, Lawrence, KS 66047, USA.
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47
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Lakard S, Herlem G, Propper A, Kastner A, Michel G, Vallès-Villarreal N, Gharbi T, Fahys B. Adhesion and proliferation of cells on new polymers modified biomaterials. Bioelectrochemistry 2004; 62:19-27. [PMID: 14990322 DOI: 10.1016/j.bioelechem.2003.09.009] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2003] [Revised: 09/11/2003] [Accepted: 09/26/2003] [Indexed: 11/21/2022]
Abstract
Up to today, several techniques have been used to maintain cells in culture for studying many aspects of cell biology and physiology. More often, cell culture is dependent on proper anchorage of cells to the growth surface. Poly-l-lysine is commonly used as adhesive molecule. In this study, we present, as an alternative to poly-l-lysine, new polymer film substrates, realized by electropolymerization of different monomers on fluorine-doped tin oxide (FTO) surfaces since electropolymerization is a good method to coat selectively metallic or semiconducting electrodes with polymer films. So, the adhesion, proliferation and morphology of rat neuronal cell lines were investigated on polymer treated surfaces. Several amine-based biocompatible polymers were tested: polyethyleneimine (PEI), polypropyleneimine (PPI), polypyrrole (PPy) and poly(p-phenylenediamine) (PPPD). These polymer films were coated on FTO surfaces by electrochemical oxidation. After 8 h in a culture medium, a high percentage of cells was found to be attached to PEI and PPI compared to the other polymers and to the reference surfaces (glass and FTO uncovered). After 24 and 72 h in the culture medium, cells were found to proliferate faster on PEI and PPI than on other polymers and reference surfaces. Consequently, cells have a greater fold expansion on PEI and PPI than on PPPD, PPy or glass and FTO uncoated. From these results, we deduce that PEI and PPI can be useful as coating surface to cultivate neuronal cells.
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Affiliation(s)
- S Lakard
- Laboratory of Chemistry Materials and Interfaces, UFR Sciences et Technique, University of Franche-Comté, 16 route de Gray, Batiment Propedeutique, 25030 Besançon, France.
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Pan D, Chen J, Nie L, Tao W, Yao S. An amperometric glucose biosensor based on poly(o-aminophenol) and Prussian blue films at platinum electrode. Anal Biochem 2004; 324:115-22. [PMID: 14654053 DOI: 10.1016/j.ab.2003.09.029] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Prussian blue (PB), as a good catalyst for the reduction of hydrogen peroxide, has been combined with nonconducting poly(o-aminophenol) (POAP) film to assemble glucose biosensor. Compared with PB-modified enzymatic biosensor, the biosensor based on glucose oxidase immobilized in POAP film at PB-modified electrode shows much improved stability (78% remains after 30 days) in neutral medium. Additionally, the biosensor, at an applied potential of 0.0 V, exhibits other good characteristics, such as relative low detection limit (0.01 mM), short response time (within 5s), large current density (0.28 mA/cm2), high sensitivity (24 mAM(-1)cm(-2)), and good antiinterferent ability. The apparent activation energy of enzyme-catalyzed reaction and apparent Michaelis-Menten constant are 34.2 KJmol(-1) and 10.5 mM, respectively. In addition, effects of temperature, applied potential used in the determination, pH value of the detection solution, and electroactive interferents on the amperometric response of the sensor were investigated and are discussed.
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Affiliation(s)
- Dawei Pan
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry, and Chemical Engineering, Hunan University, Changsha 410082, People's Republic of China
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Li XG, Huang MR, Duan W, Yang YL. Novel multifunctional polymers from aromatic diamines by oxidative polymerizations. Chem Rev 2002; 102:2925-3030. [PMID: 12222980 DOI: 10.1021/cr010423z] [Citation(s) in RCA: 393] [Impact Index Per Article: 17.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xin-Gui Li
- Department of Polymer Materials Science and Engineering, State Key Laboratory of Concrete Materials Research, College of Materials Science and Engineering, Tongji University, Shanghai, PR China.
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