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Diacci C, Burtscher B, Berto M, Ruoko TP, Lienemann S, Greco P, Berggren M, Borsari M, Simon DT, Bortolotti CA, Biscarini F. Organic Electrochemical Transistor Aptasensor for Interleukin-6 Detection. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 38141020 DOI: 10.1021/acsami.3c12397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2023]
Abstract
We demonstrate an organic electrochemical transistor (OECT) biosensor for the detection of interleukin 6 (IL6), an important biomarker associated with various pathological processes, including chronic inflammation, inflammaging, cancer, and severe COVID-19 infection. The biosensor is functionalized with oligonucleotide aptamers engineered to bind specifically IL6. We developed an easy functionalization strategy based on gold nanoparticles deposited onto a poly(3,4-ethylenedioxythiophene) doped with polystyrenesulfonate (PEDOT:PSS) gate electrode for the subsequent electrodeposition of thiolated aptamers. During this functionalization step, the reduction of sulfide bonds allows for simultaneous deposition of a blocking agent. A detection range from picomolar to nanomolar concentrations for IL6 was achieved, and the selectivity of the device was assessed against Tumor Necrosis Factor (TNF), another cytokine involved in the inflammatory processes.
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Affiliation(s)
- Chiara Diacci
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, 601 74, Norrköping, Sweden
- Dipartimento di Scienze della Vita, Università di Modena e Reggio Emilia, via Campi 103, 41125 Modena, Italy
| | - Bernhard Burtscher
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, 601 74, Norrköping, Sweden
| | - Marcello Berto
- Dipartimento di Scienze della Vita, Università di Modena e Reggio Emilia, via Campi 103, 41125 Modena, Italy
| | - Tero-Petri Ruoko
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, 601 74, Norrköping, Sweden
| | - Samuel Lienemann
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, 601 74, Norrköping, Sweden
| | - Pierpaolo Greco
- Department of Neuroscience and Rehabilitation, Università di Ferrara, Via Borsari 46, 44121 Ferrara, Italy
- Center for Translational Neurophysiology of Speech and Communication, Istituto Italiano di Tecnologia, via Fossato di Mortara 17-193, 44100 Ferrara, Italy
| | - Magnus Berggren
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, 601 74, Norrköping, Sweden
| | - Marco Borsari
- Dipartimento di Scienze Chimiche e Geologiche, Università di Modena e Reggio Emilia, via Campi 103, 41125 Modena, Italy
| | - Daniel T Simon
- Laboratory of Organic Electronics, Department of Science and Technology, Linköping University, 601 74, Norrköping, Sweden
| | - Carlo A Bortolotti
- Dipartimento di Scienze della Vita, Università di Modena e Reggio Emilia, via Campi 103, 41125 Modena, Italy
| | - Fabio Biscarini
- Dipartimento di Scienze della Vita, Università di Modena e Reggio Emilia, via Campi 103, 41125 Modena, Italy
- Center for Translational Neurophysiology of Speech and Communication, Istituto Italiano di Tecnologia, via Fossato di Mortara 17-193, 44100 Ferrara, Italy
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Rajendran J. Amperometric determination of salivary thiocyanate using electrochemically fabricated poly (3, 4-ethylenedioxythiophene)/MXene hybrid film. JOURNAL OF HAZARDOUS MATERIALS 2023; 449:130979. [PMID: 36801710 DOI: 10.1016/j.jhazmat.2023.130979] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 02/05/2023] [Accepted: 02/07/2023] [Indexed: 06/18/2023]
Abstract
Thiocyanate (SCN) is a hazardous byproduct of the detoxification of cyanide. Even in minute quantity, the SCN has a negative impact on health. Although there are several ways for SCN analysis, an efficient electrochemical procedure has hardly ever been attempted. Here, the author reports the development of a highly selective and sensitive electrochemical sensor for SCN utilizing Poly (3, 4-Ethylenedioxythiophene) incorporated MXene (PEDOT/MXene) modified screen-printed electrode (SPE). The Raman, X-ray photoelectron (XPS), and X-ray diffraction (XRD) analyses support the effective integration of PEDOT on the MXene surface. Further, scanning electron microscopy (SEM) is employed to demonstrate the formation of MXene and PEDOT/MXene hybrid film. In order to specifically detect SCN in phosphate buffer media (pH 7.4), the PEDOT/MXene hybrid film is grown on the SPE surface via the electrochemical deposition method. Under the optimized condition, the PEDOT/MXene/SPE-based sensor provides a linear response against SCN from 10 to 100 µM and 0.1 μM to 1000 μM with the lowest limit of detections (LOD) of 1.44 μM and 0.0325 μM by differential pulse voltammetry (DPV) and amperometry, respectively. For accurate detection of SCN, our newly created PEDOT/MXene hybrid film-coated SPE demonstrates excellent sensitivity, selectivity, and repeatability. Ultimately, this novel sensor can be used to detect SCN precisely in environmental and biological samples.
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Affiliation(s)
- Jerome Rajendran
- Department of Chemistry, SRM Institute of Science and Technology, Kattankulathur 603203, Tamil Nadu, India.
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Forster RJ, Henshall DC, El Naggar H, Pellegrin Y, Delanty N. Electrochemiluminescent Detection of Epilepsy Biomarker miR-134 using a Metal Complex Light Switch. Bioelectrochemistry 2022; 146:108150. [DOI: 10.1016/j.bioelechem.2022.108150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 04/27/2022] [Accepted: 04/28/2022] [Indexed: 11/02/2022]
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Abstract
Now in their 5th decade of research and development, conducting polymers represent an interesting class of materials to underpin new wearable or conformable electronic devices. Of particular interest over the years has been poly(3,4-ethylenedioxythiophene), commonly known as PEDOT, owing to its ease of fabrication and relative stability under typical ambient conditions. Understanding PEDOT from a variety of fundamental and applied perspectives is important for how it can be enhanced, modified, functionalised, and/or processed for use in commercial products. This feature article highlights the contribution of the research team at the University of South Australia led by Professor Evans, and their collaborators, putting their work into the broader context of conducting polymer research and application. This review focuses on the vapour synthesis of PEDOT doped with the tosylate anion, the benefits of controlling its morphology/structure during synthesis, and its application as an active material interacting with secondary anions in sensors, energy devices and drug delivery.
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Affiliation(s)
- Drew R Evans
- Future Industries Institute, University of South Australia, Mawson Lakes, South Australia, 5095, Australia.
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Ivanko I, Mahun A, Kobera L, Černochová Z, Pavlova E, Toman P, Pientka Z, Štěpánek P, Tomšík E. Synergy between the Assembly of Individual PEDOT Chains and Their Interaction with Light. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01975] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Iryna Ivanko
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague, Czech Republic
- Faculty of Science, Charles University, Albertov 2038, 128 00 Prague, Czech Republic
| | - Andrii Mahun
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague, Czech Republic
- Faculty of Science, Charles University, Albertov 2038, 128 00 Prague, Czech Republic
| | - Libor Kobera
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague, Czech Republic
| | - Zulfiya Černochová
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague, Czech Republic
| | - Ewa Pavlova
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague, Czech Republic
| | - Petr Toman
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague, Czech Republic
| | - Zbyněk Pientka
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague, Czech Republic
| | - Petr Štěpánek
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague, Czech Republic
| | - Elena Tomšík
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského nám. 2, 162 06 Prague, Czech Republic
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Biosensors Designed for Clinical Applications. Biomedicines 2021; 9:biomedicines9070702. [PMID: 34206405 PMCID: PMC8301448 DOI: 10.3390/biomedicines9070702] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 06/08/2021] [Accepted: 06/10/2021] [Indexed: 02/08/2023] Open
Abstract
Emerging and validated biomarkers promise to revolutionize clinical practice, shifting the emphasis away from the management of chronic disease towards prevention, early diagnosis and early intervention. The challenge of detecting these low abundance protein and nucleic acid biomarkers within the clinical context demands the development of highly sensitive, even single molecule, assays that are also capable of selectively measuring a small number of defined analytes in complex samples such as whole blood, interstitial fluid, saliva or urine. Success relies on significant innovations in nanomaterials, bioreceptor engineering, transduction strategies and microfluidics. Primarily using examples from our work, this article discusses some recent advance in the selective and sensitive detection of disease biomarkers, highlights key innovations in sensor materials and identifies issues and challenges that need to be carefully considered especially for researchers entering the field.
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Tran VV, Tran NHT, Hwang HS, Chang M. Development strategies of conducting polymer-based electrochemical biosensors for virus biomarkers: Potential for rapid COVID-19 detection. Biosens Bioelectron 2021; 182:113192. [PMID: 33819902 PMCID: PMC7992312 DOI: 10.1016/j.bios.2021.113192] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 03/16/2021] [Accepted: 03/18/2021] [Indexed: 12/24/2022]
Abstract
Rapid, accurate, portable, and large-scale diagnostic technologies for the detection of severe acute respiratory syndrome-coronavirus-2 (SARS-CoV-2) are crucial for controlling the coronavirus disease (COVID-19). The current standard technologies, i.e., reverse-transcription polymerase chain reaction, serological assays, and computed tomography (CT) exhibit practical limitations and challenges in case of massive and rapid testing. Biosensors, particularly electrochemical conducting polymer (CP)-based biosensors, are considered as potential alternatives owing to their large advantages such as high selectivity and sensitivity, rapid detection, low cost, simplicity, flexibility, long self-life, and ease of use. Therefore, CP-based biosensors can serve as multisensors, mobile biosensors, and wearable biosensors, facilitating the development of point-of-care (POC) systems and home-use biosensors for COVID-19 detection. However, the application of these biosensors for COVID-19 entails several challenges related to their degradation, low crystallinity, charge transport properties, and weak interaction with biomarkers. To overcome these problems, this study provides scientific evidence for the potential applications of CP-based electrochemical biosensors in COVID-19 detection based on their applications for the detection of various biomarkers such as DNA/RNA, proteins, whole viruses, and antigens. We then propose promising strategies for the development of CP-based electrochemical biosensors for COVID-19 detection.
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Affiliation(s)
- Vinh Van Tran
- Alan G. MacDiarmid Energy Research Institute, Chonnam National University, Gwangju 61186, South Korea
| | - Nhu Hoa Thi Tran
- Faculty of Materials Science and Technology, University of Science, HoChiMinh City 700000, Viet Nam; Vietnam National University, HoChiMinh City 700000, Viet Nam
| | - Hye Suk Hwang
- Alan G. MacDiarmid Energy Research Institute, Chonnam National University, Gwangju 61186, South Korea.
| | - Mincheol Chang
- Alan G. MacDiarmid Energy Research Institute, Chonnam National University, Gwangju 61186, South Korea; Department of Polymer Engineering, Graduate School, Chonnam National University, Gwangju 61186, South Korea; School of Polymer Science and Engineering, Chonnam National University, Gwangju 61186, South Korea.
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Farokhi M, Mottaghitalab F, Saeb MR, Shojaei S, Zarrin NK, Thomas S, Ramakrishna S. Conductive Biomaterials as Substrates for Neural Stem Cells Differentiation towards Neuronal Lineage Cells. Macromol Biosci 2020; 21:e2000123. [PMID: 33015992 DOI: 10.1002/mabi.202000123] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Revised: 08/10/2020] [Indexed: 01/23/2023]
Abstract
The injuries and defects in the central nervous system are the causes of disability and death of an affected person. As of now, there are no clinically available methods to enhance neural structural regeneration and functional recovery of nerve injuries. Recently, some experimental studies claimed that the injuries in brain can be repaired by progenitor or neural stem cells located in the neurogenic sites of adult mammalian brain. Various attempts have been made to construct biomimetic physiological microenvironment for neural stem cells to control their ultimate fate. Conductive materials have been considered as one the best choices for nerve regeneration due to the capacity to mimic the microenvironment of stem cells and regulate the alignment, growth, and differentiation of neural stem cells. The review highlights the use of conductive biomaterials, e.g., polypyrrole, polyaniline, poly(3,4-ethylenedioxythiophene), multi-walled carbon nanotubes, single-wall carbon nanotubes, graphene, and graphite oxide, for controlling the neural stem cells activities in terms of proliferation and neuronal differentiation. The effects of conductive biomaterials in axon elongation and synapse formation for optimal repair of central nervous system injuries are also discussed.
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Affiliation(s)
- Mehdi Farokhi
- National Cell Bank of Iran, Pasteur Institute of Iran, Tehran, 1316943551, Iran
| | - Fatemeh Mottaghitalab
- Nanotechnology Research CentreFaculty of Pharmacy, Tehran University of Medical Sciences, Tehran, 14155-6451, Iran
| | | | - Shahrokh Shojaei
- Stem Cells Research CenterTissue Engineering and Regenerative Medicine Institute, Islamic Azad University, Central Tehran Branch, Tehran, Iran.,Department of Biomedical Engineering, Islamic Azad University, Central Tehran Branch, Tehran, 1316943551, Iran
| | - Negin Khaneh Zarrin
- National Cell Bank of Iran, Pasteur Institute of Iran, Tehran, 1316943551, Iran
| | - Sabu Thomas
- School of Chemical Sciences, MG University, Kottayam, Kerala, 686560, India
| | - Seeram Ramakrishna
- Centre for Nanofibers and Nanotechnology, Department of Mechanical Engineering, National University of Singapore, Singapore, 117576, Singapore
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Electrodeposited poly(3,4-ethylenedioxythiophene) doped with graphene oxide for the simultaneous voltammetric determination of ascorbic acid, dopamine and uric acid. Mikrochim Acta 2020; 187:94. [PMID: 31902014 DOI: 10.1007/s00604-019-4083-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Accepted: 12/13/2019] [Indexed: 01/20/2023]
Abstract
Poly(3,4-ethylenedioxythiophene) (PEDOT) films were electrodeposited by cyclic voltammetry on a glassy carbon electrode (GCE) in aqueous solution. Three kinds of supporting electrolytes were used, viz. graphene oxide (GO), phosphate buffered saline (PBS), and GO in PBS, respectively. The surface morphology of the modified electrodes was characterized by scanning electron microscopy. The electrochemical performance of the modified electrodes was investigated by cyclic voltammetry and electrochemical impedance spectroscopy by using the hexacyanoferrate redox system. The results demonstrate that the PEDOT-GO/GCE, which was electropolymerized in aqueous solutions containing EDOT and GO, shows the best electrochemical activities compared with other modified electrodes. The electrochemical behaviors of ascorbic acid (AA), dopamine (DA) and uric acid (UA) were investigated by cyclic voltammetry. The PEDOT-GO/GCE exhibits enhanced electrocatalytic activities towards these important biomolecules. Under physiological pH conditions and in the mixed system of AA, DA and UA, the modified GCE exhibits the following figures of merit: (a) a linear voltammetric response in the concentration ranges of 100-1000 μM for AA, 6.0-200 μM for DA, and 40-240 μM for UA; (b) well separated oxidation peaks near 31, 213 and 342 mV (vs. saturated Ag/AgCl) for AA, DA and UA, respectively; and (c) detection of limits (at S/N = 3) of 20, 2.0 and 10 μM. The results demonstrate that GO, based on its relatively large number of anionic sites, can be used as the sole weak electrolyte and charge balance dopant for the preparation of functionally doped conducting polymers by electrodeposition. Graphical abstractSchematic representation of a nanostructure composed of hybrid conducting polymer PEDOT-GO nanocomposites, and its application to simultaneous determination of ascorbic acid, dopamine and uric acid.
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Electrochemical Characterization of Mancozeb Degradation for Wastewater Treatment Using a Sensor Based on Poly (3,4-ethylenedioxythiophene) (PEDOT) Modified with Carbon Nanotubes and Gold Nanoparticles. Polymers (Basel) 2019; 11:polym11091449. [PMID: 31487849 PMCID: PMC6780876 DOI: 10.3390/polym11091449] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 08/18/2019] [Accepted: 08/30/2019] [Indexed: 01/03/2023] Open
Abstract
Mancozeb is a worldwide fungicide used on a large scale in agriculture. The active component and its main metabolite, ethylene thiourea, has been related to health issues. Robust, fast, and reliable methodologies to quantify its presence in water are of great importance for environmental and health reasons. The electrochemical evaluation of mancozeb using a low-cost electrochemical electrode modified with poly (3,4-ethylene dioxythiophene), multi-walled carbon nanotubes, and gold nanoparticles is a novel strategy to provide an in-situ response for water pollution from agriculture. Additionally, the thermal-, electrochemical-, and photo-degradation of mancozeb and the production of ethylene thiourea under controlled conditions were evaluated in this research. The mancozeb solutions were characterized by electrochemical oxidation and ultraviolet-visible spectrophotometry, and the ethylene thiourea concentration was measured using ultra-high-performance liquid chromatography high-resolution mass spectrometry. The degradation study of mancozeb may provide routes for treatment in wastewater treatment plants. Therefore, a low-cost electrochemical electrode was fabricated to detect mancozeb in water with a robust electrochemical response in the linear range as well as a quick response at a reduced volume. Hence, our novel modified electrode provides a potential technique to be used in environmental monitoring for pesticide detection.
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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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Gu Y, Tseng PY, Bi X, Yang JHC. Quantification of DNA by a Thermal-Durable Biosensor Modified with Conductive Poly(3,4-ethylenedioxythiophene). SENSORS 2018; 18:s18113684. [PMID: 30380711 PMCID: PMC6264125 DOI: 10.3390/s18113684] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 10/22/2018] [Accepted: 10/25/2018] [Indexed: 01/19/2023]
Abstract
The general clinical procedure for viral DNA detection or gene mutation diagnosis following polymerase chain reaction (PCR) often involves gel electrophoresis and DNA sequencing, which is usually time-consuming. In this study, we have proposed a facile strategy to construct a DNA biosensor, in which the platinum electrode was modified with a dual-film of electrochemically synthesized poly(3,4-ethylenedioxythiophene) (PEDOT) resulting in immobilized gold nanoparticles, with the gold nanoparticles easily immobilized in a uniform distribution. The DNA probe labeled with a SH group was then assembled to the fabricated electrode and employed to capture the target DNA based on the complementary sequence. The hybridization efficiency was evaluated with differential pulse voltammetry (DPV) in the presence of daunorubicin hydrochloride. Our results demonstrated that the peak current in DPV exhibited a linear correlation the concentration of target DNA that was complementary to the probe DNA. Moreover, the electrode could be reused by heating denaturation and re-hybridization, which only brought slight signal decay. In addition, the addition of the oxidized form of nicotinamide adenine dinucleotide (NAD+) could dramatically enhance the sensitivity by more than 5.45-fold, and the limit-of-detection reached about 100 pM.
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Affiliation(s)
- Yesong Gu
- Department of Chemical and Materials Engineering, Tunghai University, Taichung 40704, Taiwan.
| | - Po-Yuan Tseng
- Department of Chemical and Materials Engineering, Tunghai University, Taichung 40704, Taiwan.
| | - Xiang Bi
- Department of Chemical and Materials Engineering, Tunghai University, Taichung 40704, Taiwan.
| | - Jason H C Yang
- Department of Fiber and Composite Materials, Feng Chia University, Taichung 40724, Taiwan.
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Synthesis and electrochemical sensing application of poly(3,4-ethylenedioxythiophene)-based materials: A review. Anal Chim Acta 2018; 1022:1-19. [DOI: 10.1016/j.aca.2018.02.080] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Revised: 02/23/2018] [Accepted: 02/24/2018] [Indexed: 02/07/2023]
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Xu Y, Lei W, Su J, Hu J, Yu X, Zhou T, Yang Y, Mandler D, Hao Q. A high-performance electrochemical sensor based on g-C3N4-E-PEDOT for the determination of acetaminophen. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2017.11.034] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Sharma A, Kumar A, Khan R. Electrochemical immunosensor based on poly (3,4-ethylenedioxythiophene) modified with gold nanoparticle to detect aflatoxin B1. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 76:802-809. [DOI: 10.1016/j.msec.2017.03.146] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2016] [Revised: 03/09/2017] [Accepted: 03/13/2017] [Indexed: 12/18/2022]
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Acharya SS, Easton CD, McCoy TM, Spiccia L, Ohlin CA, Winther-Jensen B. Diverse composites of metal-complexes and PEDOT facilitated by metal-free vapour phase polymerization. REACT FUNCT POLYM 2017. [DOI: 10.1016/j.reactfunctpolym.2017.04.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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High Sensitivity Determination of TNF-α for Early Diagnosis of Neonatal Infections with a Novel and Reusable Electrochemical Sensor. SENSORS 2017; 17:s17050992. [PMID: 28489023 PMCID: PMC5469345 DOI: 10.3390/s17050992] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Revised: 04/12/2017] [Accepted: 04/26/2017] [Indexed: 12/14/2022]
Abstract
Early diagnosis is vital for the reduction of mortality caused by neonatal infections. Since TNF-α can be used as a marker for the early diagnosis, the detection of TNF-α with high sensitivity and specificity has great clinical significance. Herein, a highly sensitive and reusable electrochemical sensor was fabricated. Due to the high specificity of aptamers, TNF-α could be accurately detected from five similar cytokines, even from serum samples. In addition, Au nanoparticles (AuNPs) with a high surface area were able to combine a large number of doxorubicin hydrochloride (DOXh), which made the sensor have a high sensitivity. The sensor had a good linear relationship with TNF-α concentration in the range from 1 to 1 × 104 pg/mL and the lowest detection limit is 0.7 pg/mL. More important was that the sensor could be reused 6 times by a crafty use of chain replacement reaction. Meanwhile, the detection time and cost were greatly reduced. Thus, we believe that these advantages of higher specificity and sensitivity, lower cost, and shorter detection time will provide a stronger potential for early diagnosis of neonatal infections in clinical applications.
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Gold nanoparticle-polymer nanocomposites synthesized by room temperature atmospheric pressure plasma and their potential for fuel cell electrocatalytic application. Sci Rep 2017; 7:46682. [PMID: 28436454 PMCID: PMC5402388 DOI: 10.1038/srep46682] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Accepted: 03/24/2017] [Indexed: 01/18/2023] Open
Abstract
Conductive polymers have been increasingly used as fuel cell catalyst support due to their electrical conductivity, large surface areas and stability. The incorporation of metal nanoparticles into a polymer matrix can effectively increase the specific surface area of these materials and hence improve the catalytic efficiency. In this work, a nanoparticle loaded conductive polymer nanocomposite was obtained by a one-step synthesis approach based on room temperature direct current plasma-liquid interaction. Gold nanoparticles were directly synthesized from HAuCl4 precursor in poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS). The resulting AuNPs/PEDOT:PSS nanocomposites were subsequently characterized under a practical alkaline direct ethanol fuel cell operation condition for its potential application as an electrocatalyst. Results show that AuNPs sizes within the PEDOT:PSS matrix are dependent on the plasma treatment time and precursor concentration, which in turn affect the nanocomposites electrical conductivity and their catalytic performance. Under certain synthesis conditions, unique nanoscale AuNPs/PEDOT:PSS core-shell structures could also be produced, indicating the interaction at the AuNPs/polymer interface. The enhanced catalytic activity shown by AuNPs/PEDOT:PSS has been attributed to the effective electron transfer and reactive species diffusion through the porous polymer network, as well as the synergistic interfacial interaction at the metal/polymer and metal/metal interfaces.
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Dai M, Chen J, Goddard JM, Nugen SR. Facile hierarchical assembly of gold particle decorated conductive polymer nanofibers for electrochemical sensing. NANOTECHNOLOGY 2017; 28:06LT01. [PMID: 28044995 DOI: 10.1088/1361-6528/aa53f1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this study, we successfully applied vapor-phase polymerization towards the synthesis of PEDOT nanofibers which were subsequently functionalized with gold particles and used as electrodes for electrochemical sensing. Two methods were used to synthesize the PEDOT nanofibers including (1) electrospinning followed by vapor-phase polymerization (EVP), and (2) one-step vapor-phase polymerization (OSVP). The average diameter of EVP fibers was approximately 350 nm, and OSVP was approximately 200 nm. Gold particles (∼500 nm) were synthesized by an oxidation-reduction reaction between gold precursors and residue EDOT monomers on the surface of the PEDOT nanofibers. In order to investigate the electrochemical performance of these electrodes, ascorbic acid was chosen as an analyte model. Our results indicated that PEDOT nanofiber electrodes showed an enhanced response with respect to bare gold electrodes. Furthermore, the OSVP PEDOT nanofibers with gold particles demonstrated the highest sensitivity at low ascorbic acid concentrations. These hierarchically assembled, gold particle-decorated, conductive polymer nanofibers were further fabricated into flexible electrodes, demonstrating a potential in advanced applications such as wearable electronics.
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Affiliation(s)
- Minhui Dai
- Department of Food Science, University of Massachusetts, 102 Holdsworth Way, MA 01003, USA
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Next-generation polymer nanocomposite-based electrochemical sensors and biosensors: A review. Trends Analyt Chem 2016. [DOI: 10.1016/j.trac.2016.04.005] [Citation(s) in RCA: 186] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Mayevsky D, Gann E, Garvey CJ, McNeill CR, Winther-Jensen B. Decoupling order and conductivity in doped conducting polymers. Phys Chem Chem Phys 2016; 18:19397-404. [PMID: 27374244 DOI: 10.1039/c6cp03307e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein it is demonstrated that the high level of interchain ordering of pEDOT is not necessary for the polymer to have efficient charge transport. Resistance and order are compared during the manufacturing process, where the polymerisation step and ordering step are decoupled as separate stages of the processing. GIWAXS experiments measuring interchain order are correlated to resistivity measurements at multiple stages of the manufacturing process on single films, and it is shown that for an individual film, where percolation is achieved, having a long range ordered system offers no reduction in resistance compared to having a highly disordered state of the same film. For this system, once the chains of pEDOT are formed, it is experimentally demonstrated that for percolation to be achieved, a remarkably low 4.5% volume fraction pEDOT is required. The apparent lack of necessity for significant interchain ordering allows for a meaningful measurement of development of the charge transport during the chemical polymerisation process.
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Affiliation(s)
- David Mayevsky
- Department of Materials Science and Engineering
- Monash University
- Clayton
- Australia
| | - Eliot Gann
- Department of Materials Science and Engineering
- Monash University
- Clayton
- Australia
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22
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Estrany F, Calvet A, del Valle LJ, Puiggalí J, Alemán C. A multi-step template-assisted approach for the formation of conducting polymer nanotubes onto conducting polymer films. Polym Chem 2016. [DOI: 10.1039/c6py00437g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hollow poly(3,4-ethylenedioxythiophene) (PEDOT) nano- and microtubes have been successfully prepared using an approach designed to overcome the limitations of the template-assisted approach.
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Affiliation(s)
- Francesc Estrany
- Departament d'Enginyeria Química
- Escola Universitària d'Enginyeria Tècnica Industrial de Barcelona
- Universitat Politècnica de Catalunya
- 08036 Barcelona
- Spain
| | - Aureli Calvet
- Departament d'Enginyeria Química
- Escola Universitària d'Enginyeria Tècnica Industrial de Barcelona
- Universitat Politècnica de Catalunya
- 08036 Barcelona
- Spain
| | - Luis J. del Valle
- Departament d'Enginyeria Química
- Escola Universitària d'Enginyeria Tècnica Industrial de Barcelona
- Universitat Politècnica de Catalunya
- 08036 Barcelona
- Spain
| | - Jordi Puiggalí
- Center for Research in Nano-Engineering
- Universitat Politècnica de Catalunya
- Barcelona E-08028
- Spain
- Departament d'Enginyeria Química
| | - Carlos Alemán
- Center for Research in Nano-Engineering
- Universitat Politècnica de Catalunya
- Barcelona E-08028
- Spain
- Departament d'Enginyeria Química
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Identification of Chinese Herbs Using a Sequencing-Free Nanostructured Electrochemical DNA Biosensor. SENSORS 2015; 15:29882-92. [PMID: 26633399 PMCID: PMC4721694 DOI: 10.3390/s151229773] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Revised: 11/03/2015] [Accepted: 11/19/2015] [Indexed: 01/11/2023]
Abstract
Due to the nearly identical phenotypes and chemical constituents, it is often very challenging to accurately differentiate diverse species of a Chinese herbal genus. Although technologies including DNA barcoding have been introduced to help address this problem, they are generally time-consuming and require expensive sequencing. Herein, we present a simple sequencing-free electrochemical biosensor, which enables easy differentiation between two closely related Fritillaria species. To improve its differentiation capability using trace amounts of DNA sample available from herbal extracts, a stepwise electrochemical deposition of reduced graphene oxide (RGO) and gold nanoparticles (AuNPs) was adopted to engineer a synergistic nanostructured sensing interface. By using such a nanofeatured electrochemical DNA (E-DNA) biosensor, two Chinese herbal species of Fritillaria (F. thunbergii and F. cirrhosa) were successfully discriminated at the DNA level, because a fragment of 16-mer sequence at the spacer region of the 5S-rRNA only exists in F. thunbergii. This E-DNA sensor was capable of identifying the target sequence in the range from 100 fM to 10 nM, and a detection limit as low as 11.7 fM (S/N = 3) was obtained. Importantly, this sensor was applied to detect the unique fragment of the PCR products amplified from F. thunbergii and F. cirrhosa, respectively. We anticipate that such a direct, sequencing-free sensing mode will ultimately pave the way towards a new generation of herb-identification strategies.
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Cunha MV, Inácio J. Nucleic-acid testing, new platforms and nanotechnology for point-of-decision diagnosis of animal pathogens. Methods Mol Biol 2015; 1247:253-83. [PMID: 25399103 PMCID: PMC7122192 DOI: 10.1007/978-1-4939-2004-4_20] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Accurate disease diagnosis in animals is crucial for animal well-being but also for preventing zoonosis transmission to humans. In particular, livestock diseases may constitute severe threats to humans due to the particularly high physical contact and exposure and, also, be the cause of important economic losses, even in non-endemic countries, where they often arise in the form of rapid and devastating epidemics. Rapid diagnostic tests have been used for a long time in field situations, particularly during outbreaks. However, they mostly rely on serological approaches, which may confirm the exposure to a particular pathogen but may be inappropriate for point-of-decision (point-of-care) settings when emergency responses supported on early and accurate diagnosis are required. Moreover, they often exhibit modest sensitivity and hence significantly depend on later result confirmation in central or reference laboratories. The impressive advances observed in recent years in materials sciences and in nanotechnology, as well as in nucleic-acid synthesis and engineering, have led to an outburst of new in-the-bench and prototype tests for nucleic-acid testing towards point-of-care diagnosis of genetic and infectious diseases. Manufacturing, commercial, regulatory, and technical nature issues for field applicability more likely have hindered their wider entrance into veterinary medicine and practice than have fundamental science gaps. This chapter begins by outlining the current situation, requirements, difficulties, and perspectives of point-of-care tests for diagnosing diseases of veterinary interest. Nucleic-acid testing, particularly for the point of care, is addressed subsequently. A range of valuable signal transduction mechanisms commonly employed in proof-of-concept schemes and techniques born on the analytical chemistry laboratories are also described. As the essential core of this chapter, sections dedicated to the principles and applications of microfluidics, lab-on-a-chip, and nanotechnology for the development of point-of-care tests are presented. Microdevices already applied or under development for application in field diagnosis of animal diseases are reviewed.
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Affiliation(s)
- Mónica V. Cunha
- Instituto Nacional de Investigação Agrária e Veterinária, IP and Centro de Biologia Ambiental, Faculdade de Ciências, Universidade de Lisboa, Lisbon, Portugal
| | - João Inácio
- Instituto Nacional de Investigação Agrária e Veterinária, IP, Lisboa, Portugal and School of Pharmacy and Biomolecular Sciences, University of Brighton, Brighton, United Kingdom
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Nowicka AM, Fau M, Rapecki T, Donten M. Polypyrrole-Au Nanoparticles Composite as Suitable Platform for DNA Biosensor with Electrochemical Impedance Spectroscopy Detection. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.03.187] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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27
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A novel electrochemical DNA biosensor construction based on layered CuS–graphene composite and Au nanoparticles. Anal Bioanal Chem 2014; 406:6943-51. [DOI: 10.1007/s00216-014-7904-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 05/12/2014] [Accepted: 05/14/2014] [Indexed: 02/07/2023]
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Fabregat G, Armelin E, Alemán C. Selective Detection of Dopamine Combining Multilayers of Conducting Polymers with Gold Nanoparticles. J Phys Chem B 2014; 118:4669-82. [DOI: 10.1021/jp412613g] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Georgina Fabregat
- Departament
d’Enginyeria Química, E. T. S. d’Enginyers Industrials, Universitat Politècnica de Catalunya, Diagonal 647, 08028 Barcelona, Spain
- Center
for Research in Nano-Engineering, Universitat Politècnica de Catalunya, Campus Sud, Edifici C’, C/Pasqual i Vila s/n, Barcelona E-08028, Spain
| | - Elaine Armelin
- Departament
d’Enginyeria Química, E. T. S. d’Enginyers Industrials, Universitat Politècnica de Catalunya, Diagonal 647, 08028 Barcelona, Spain
- Center
for Research in Nano-Engineering, Universitat Politècnica de Catalunya, Campus Sud, Edifici C’, C/Pasqual i Vila s/n, Barcelona E-08028, Spain
| | - Carlos Alemán
- Departament
d’Enginyeria Química, E. T. S. d’Enginyers Industrials, Universitat Politècnica de Catalunya, Diagonal 647, 08028 Barcelona, Spain
- Center
for Research in Nano-Engineering, Universitat Politècnica de Catalunya, Campus Sud, Edifici C’, C/Pasqual i Vila s/n, Barcelona E-08028, Spain
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Lawal AT, Wallace GG. Vapour phase polymerisation of conducting and non-conducting polymers: A review. Talanta 2014; 119:133-43. [DOI: 10.1016/j.talanta.2013.10.023] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Revised: 10/12/2013] [Accepted: 10/15/2013] [Indexed: 01/01/2023]
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Graphene sheets, polyaniline and AuNPs based DNA sensor for electrochemical determination of BCR/ABL fusion gene with functional hairpin probe. Biosens Bioelectron 2014; 51:201-7. [DOI: 10.1016/j.bios.2013.07.049] [Citation(s) in RCA: 129] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Revised: 07/18/2013] [Accepted: 07/25/2013] [Indexed: 01/16/2023]
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31
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Gold microwires based amperometric biosensor exploiting microbial architecture. Biosens Bioelectron 2013; 50:174-9. [DOI: 10.1016/j.bios.2013.06.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2013] [Revised: 06/03/2013] [Accepted: 06/04/2013] [Indexed: 11/19/2022]
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32
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Vapour phase polymerised polyaniline–gold nanoparticle composites for DNA detection. J Electroanal Chem (Lausanne) 2013. [DOI: 10.1016/j.jelechem.2013.08.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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33
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A DNA machine for sensitive and homogeneous DNA detection via lambda exonuclease assisted amplification. Talanta 2013; 115:819-22. [DOI: 10.1016/j.talanta.2013.06.062] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2013] [Revised: 06/25/2013] [Accepted: 06/28/2013] [Indexed: 12/31/2022]
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Radhakrishnan S, Sumathi C, Umar A, Jae Kim S, Wilson J, Dharuman V. Polypyrrole–poly(3,4-ethylenedioxythiophene)–Ag (PPy–PEDOT–Ag) nanocomposite films for label-free electrochemical DNA sensing. Biosens Bioelectron 2013; 47:133-40. [DOI: 10.1016/j.bios.2013.02.049] [Citation(s) in RCA: 100] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2012] [Revised: 02/05/2013] [Accepted: 02/25/2013] [Indexed: 12/26/2022]
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35
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Venditti I, Fratoddi I, Russo MV, Bearzotti A. A nanostructured composite based on polyaniline and gold nanoparticles: synthesis and gas sensing properties. NANOTECHNOLOGY 2013; 24:155503. [PMID: 23518508 DOI: 10.1088/0957-4484/24/15/155503] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Nanostructured composite materials based on polyaniline (PANI) and gold nanoparticles have been prepared by means of an osmosis based method. Several morphologies have been obtained for the pristine nanoPANI and for nanoPANI-Au composite, ranging from amorphous to sponge-like and spherical shapes. On the basis of this morphological investigation, different materials with high surface area have been selected and tested as chemical interactive materials for room temperature gas and vapor sensing. The resistive sensor devices have been exposed to different vapor organic compounds (VOCs) of interest in the fields of environmental monitoring and biomedical applications, such as toluene, acetic acid, ethanol, methanol, acetonitrile, water, ammonia and nitrogen dioxide. The effect of doping with H2SO4 has been studied for both nanoPANI and nanoPANI-Au samples. In particular, nanoPANI-Au showed sensitivity to ammonia (up to 10 ppm) higher than that to other VOCs or interfering analytes. The facile preparation method and the improved properties achieved for the polyaniline-gold composite materials are significant in the nanomaterials field and have promise for applications in ammonia vapor monitoring.
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Affiliation(s)
- Iole Venditti
- Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, Rome, Italy
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