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Facile fabrication of ternary MWCNTs/ZnO/Chitosan nanocomposite for enhanced photocatalytic degradation of methylene blue and antibacterial activity. Sci Rep 2022; 12:5927. [PMID: 35396520 PMCID: PMC8993914 DOI: 10.1038/s41598-022-09571-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2021] [Accepted: 03/14/2022] [Indexed: 11/27/2022] Open
Abstract
Developing a cheap, stable and effective photocatalyst is necessary for remediation of persistent organic pollutants. To address this challenge, we proposed a unique interfacial engineering technique and proper bandgap matching strategy to synthesize MWCNTs/ZnO/Chitosan ternary nanocomposite for effective photocatalytic application. The features of the prepared samples were determined by FESEM, TEM, EDX, elemental mapping, AFM, FT-IR, XRD, UV–Vis spectroscopy and BET surface analysis. The obtained results showed successful fabrication of synthesized nanocomposites with enhanced surface area. Degradation effect of nanostructures on methylene blue (MB) and antibacterial activity against Escherichia coli (E. coli), Staphylococcus aureus (S. aureus) and Bacillus subtilis (B. subtilis) pathogenic strains were investigated. The proposed photocatalytic mechanism illustrated the electron transfer facilitated by MWCNTs/ZnO/Chitosan structure which results in spatial separation of electron–hole pairs. Compared with ZnO and ZnO/Chitosan, the prepared MWCNTs/ZnO/Chitosan ternary nanocomposite showed high usage of UV illumination and superior separation of photogenerated electron–hole pairs. MWCNTs/ZnO/Chitosan illustrated 86.26% adsorption rate and outstanding increased photocatalytic activity on MB degradation efficiency of 98.76% after 20 min. Stability of photocatalyst reached from 98.76% initial decolorization to 85% at the fourth cycle. In addition, the ternary nanocomposite also exhibited remarkable bactericidal activity against gram-positive (S. aureus) and (B. subtilis) and gram-negative (E. coli) bacteria strains. Due to the obtained results, the prepared nanocomposite would be an efficient candidate photocatalyst with antibacterial properties.
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Cursaru LM, Valsan SN, Puscasu ME, Tudor IA, Zarnescu-Ivan N, Vasile BS, Piticescu RM. Study of ZnO-CNT Nanocomposites in High-Pressure Conditions. MATERIALS 2021; 14:ma14185330. [PMID: 34576552 PMCID: PMC8464694 DOI: 10.3390/ma14185330] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 09/09/2021] [Accepted: 09/10/2021] [Indexed: 11/16/2022]
Abstract
Recently, carbon nanotubes (CNTs) have been used extensively to develop new materials and devices due to their specific morphology and properties. The reinforcement of different metal oxides such as zinc oxide (ZnO) with CNT develops advanced multifunctional materials with improved properties. Our aim is to obtain ZnO-CNT nanocomposites by in situ hydrothermal method in high-pressure conditions. Various compositions were tested. The structure and morphology of ZnO-CNT nanocomposites were analyzed by Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry—thermogravimetry (DSC-TG), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and transmission electron microscopy (TEM). These analyses showed the formation of complex ZnO-CNT structures. FT-IR spectra suggest possible interactions between CNT and ZnO. DSC-TG analysis also reveals the formation of some physical bonds between ZnO and CNT, through the appearance of endothermic peaks which could be assigned to the decomposition of functional groups of the CNT chain and breaking of the ZnO-CNT bonds. XRD characterization demonstrated the existence of ZnO nanocrystallites with size around 60 nm. The best ZnO:CNT composition was further selected for preliminary investigations of the potential of these nanocomposite powders to be processed as pastes for extrusion-based 3D printing.
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Affiliation(s)
- Laura-Madalina Cursaru
- National R&D Institute for Non-Ferrous and Rare Metals, INCDMNR-IMNR, 077145 Pantelimon, Romania; (L.-M.C.); (S.N.V.); (M.-E.P.); (I.A.T.); (N.Z.-I.)
| | - Sorina Nicoleta Valsan
- National R&D Institute for Non-Ferrous and Rare Metals, INCDMNR-IMNR, 077145 Pantelimon, Romania; (L.-M.C.); (S.N.V.); (M.-E.P.); (I.A.T.); (N.Z.-I.)
| | - Maria-Eliza Puscasu
- National R&D Institute for Non-Ferrous and Rare Metals, INCDMNR-IMNR, 077145 Pantelimon, Romania; (L.-M.C.); (S.N.V.); (M.-E.P.); (I.A.T.); (N.Z.-I.)
| | - Ioan Albert Tudor
- National R&D Institute for Non-Ferrous and Rare Metals, INCDMNR-IMNR, 077145 Pantelimon, Romania; (L.-M.C.); (S.N.V.); (M.-E.P.); (I.A.T.); (N.Z.-I.)
| | - Nicoleta Zarnescu-Ivan
- National R&D Institute for Non-Ferrous and Rare Metals, INCDMNR-IMNR, 077145 Pantelimon, Romania; (L.-M.C.); (S.N.V.); (M.-E.P.); (I.A.T.); (N.Z.-I.)
| | - Bogdan Stefan Vasile
- National Research Center for Micro and Nanomaterials, University POLITEHNICA of Bucharest, 011061 Bucharest, Romania;
| | - Roxana Mioara Piticescu
- National R&D Institute for Non-Ferrous and Rare Metals, INCDMNR-IMNR, 077145 Pantelimon, Romania; (L.-M.C.); (S.N.V.); (M.-E.P.); (I.A.T.); (N.Z.-I.)
- Correspondence: ; Tel.: +40-0213-522-046
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Rajabather J, Albaqami MD, Lohedan HA, Arunachalam P, Thirunavukkarasu K, Appaturi JN. Preparation, characterization, and morphology insight of ZnO nanodisk–TiO
2
‐coated SWCNT thin film composites for catalytic sensor application. SURF INTERFACE ANAL 2021. [DOI: 10.1002/sia.6926] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- JothiRamalingam Rajabather
- Chemistry Department, College of Science King Saud University Riyadh 11451 Saudi Arabia
- Surfactant Research Chair, Chemistry Department, College of Science King Saud University Riyadh 11451 Saudi Arabia
| | - Munirah D. Albaqami
- Chemistry Department, College of Science King Saud University Riyadh 11451 Saudi Arabia
| | - Hamad A. Lohedan
- Surfactant Research Chair, Chemistry Department, College of Science King Saud University Riyadh 11451 Saudi Arabia
| | | | - Kandasamy Thirunavukkarasu
- Department of chemistry Vel Tech Rangarajan Dr.Sagunthala R&D Institute of Science and Technology, Avadi, Chennai, India Chennai 600062 India
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4
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Hlongwane GN, Dodoo-Arhin D, Wamwangi D, Daramola MO, Moothi K, Iyuke SE. DNA hybridisation sensors for product authentication and tracing: State of the art and challenges. SOUTH AFRICAN JOURNAL OF CHEMICAL ENGINEERING 2019. [DOI: 10.1016/j.sajce.2018.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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5
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Voltammetric determination of meclizine HCL and its application in pharmaceuticals and biological fluid using CNTS/ZnO nano-carbon modified electrode. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2018. [DOI: 10.1007/s13738-018-1385-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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6
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Dalkıran B, Kaçar C, Erden PE, Kılıç E. Electrochemical xanthine biosensor based on zinc oxide nanoparticles‒multiwalled carbon nanotubes‒1,4-benzoquinone composite. JOURNAL OF THE TURKISH CHEMICAL SOCIETY, SECTION A: CHEMISTRY 2018. [DOI: 10.18596/jotcsa.307414] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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7
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Yang T, Chen M, Kong Q, Luo X, Jiao K. Toward DNA electrochemical sensing by free-standing ZnO nanosheets grown on 2D thin-layered MoS2. Biosens Bioelectron 2017; 89:538-544. [DOI: 10.1016/j.bios.2016.03.025] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 02/19/2016] [Accepted: 03/13/2016] [Indexed: 10/22/2022]
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8
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A new nano-worm structure from gold-nanoparticle mediated random curving of zinc oxide nanorods. Biosens Bioelectron 2016; 78:14-22. [DOI: 10.1016/j.bios.2015.10.083] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 10/16/2015] [Accepted: 10/28/2015] [Indexed: 10/22/2022]
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9
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Sulfonated polyaniline-graphene oxide hybrids: Synthesis and effect of monomer composition on the electrochemical signal for direct DNA detection. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/pola.28032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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10
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Yang T, Chen M, Kong Q, Wang X, Guo X, Li W, Jiao K. Shape-controllable ZnO nanostructures based on synchronously electrochemically reduced graphene oxide and their morphology-dependent electrochemical performance. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.09.158] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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11
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An ultrasensitive DNA biosensor based on covalent immobilization of probe DNA on fern leaf-like α-Fe2O3 and chitosan Hybrid film using terephthalaldehyde as arm-linker. Biosens Bioelectron 2015; 72:175-81. [DOI: 10.1016/j.bios.2015.05.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 04/23/2015] [Accepted: 05/06/2015] [Indexed: 01/31/2023]
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12
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Tashkhourian J, Hemmateenejad B, Beigizadeh H, Hosseini-Sarvari M, Razmi Z. ZnO nanoparticles and multiwalled carbon nanotubes modified carbon paste electrode for determination of naproxen using electrochemical techniques. J Electroanal Chem (Lausanne) 2014. [DOI: 10.1016/j.jelechem.2013.12.026] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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13
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Evtugyn G, Cherkina U, Porfireva A, Danzberger J, Ebner A, Hianik T. Electrochemical Aptasensor Based on ZnO Modified Gold Electrode. ELECTROANAL 2013. [DOI: 10.1002/elan.201300195] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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14
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Jirimali HD, Nagarale RK, Lee JM, Saravanakumar D, Shin W. Chitosan-Cross-linked Osmium Polymer Composites as an Efficient Platform for Electrochemical Biosensors. Chemphyschem 2013; 14:2232-6. [DOI: 10.1002/cphc.201300169] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2013] [Indexed: 11/10/2022]
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15
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Yang T, Guo X, Ma Y, Li Q, Zhong L, Jiao K. Electrochemical impedimetric DNA sensing based on multi-walled carbon nanotubes-SnO2-chitosan nanocomposite. Colloids Surf B Biointerfaces 2013; 107:257-61. [PMID: 23498361 DOI: 10.1016/j.colsurfb.2013.01.046] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2012] [Revised: 01/11/2013] [Accepted: 01/17/2013] [Indexed: 01/05/2023]
Abstract
A sensitive electrochemical impedimetric DNA biosensor based on the integration of tin oxide (SnO2) nanoparticles, chitosan (CHIT) and multi-walled carbon nanotubes (MWNTs) is presented in this paper. The MWNTs-SnO2-CHIT composite modified gold electrode was characterized by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Compared with individual MWNTs-CHIT, SnO2-CHIT and bare gold electrode, this composite showed the most obvious electrochemical signal of the redox probe [Fe(CN)6](3-/4-). According to the change of the electron transfer resistance (R(et)) induced by the hybridization, target DNA was successfully detected via EIS. This DNA electrochemical biosensor was applied to detect phosphinothricin acetyltransferase (PAT) gene in transgenic corn. The synergistic effect of the MWNTs-SnO2-CHIT remarkably enhanced DNA immobilization and hybridization detection. The dynamic detection range was from 1.0×10(-11) mol/L to 1.0×10(-6) mol/L with a detection limit of 2.5×10(-12) mol/L. This sensing platform showed inner advantage, such as simplicity, good stability, and high sensitivity.
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Affiliation(s)
- Tao Yang
- Key Laboratory of Eco-chemical Engineering (Ministry of Education), College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
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16
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Jirimali HD, Nagarale RK, Saravanakumar D, Lee JM, Shin W. Hydroquinone modified chitosan/carbon film electrode for the selective detection of ascorbic acid. Carbohydr Polym 2013; 92:641-4. [DOI: 10.1016/j.carbpol.2012.09.024] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Revised: 09/10/2012] [Accepted: 09/10/2012] [Indexed: 11/28/2022]
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17
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Gao H, Sun M, Lin C, Wang S. Electrochemical DNA Biosensor Based on Graphene and TiO2Nanorods Composite Film for the Detection of Transgenic Soybean Gene Sequence of MON89788. ELECTROANAL 2012. [DOI: 10.1002/elan.201200403] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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18
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Arya SK, Saha S, Ramirez-Vick JE, Gupta V, Bhansali S, Singh SP. Recent advances in ZnO nanostructures and thin films for biosensor applications: review. Anal Chim Acta 2012; 737:1-21. [PMID: 22769031 DOI: 10.1016/j.aca.2012.05.048] [Citation(s) in RCA: 206] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2011] [Revised: 05/25/2012] [Accepted: 05/28/2012] [Indexed: 01/31/2023]
Abstract
Biosensors have shown great potential for health care and environmental monitoring. The performance of biosensors depends on their components, among which the matrix material, i.e., the layer between the recognition layer of biomolecule and transducer, plays a crucial role in defining the stability, sensitivity and shelf-life of a biosensor. Recently, zinc oxide (ZnO) nanostructures and thin films have attracted much interest as materials for biosensors due to their biocompatibility, chemical stability, high isoelectric point, electrochemical activity, high electron mobility, ease of synthesis by diverse methods and high surface-to-volume ratio. ZnO nanostructures have shown the binding of biomolecules in desired orientations with improved conformation and high biological activity, resulting in enhanced sensing characteristics. Furthermore, compatibility with complementary metal oxide semiconductor technology for constructing integrated circuits makes ZnO nanostructures suitable candidate for future small integrated biosensor devices. This review highlights recent advances in various approaches towards synthesis of ZnO nanostructures and thin films and their applications in biosensor technology.
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Affiliation(s)
- Sunil K Arya
- Bioelectronics Program, Institute of Microelectronics, Singapore Science Park II, Singapore 117685, Singapore.
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19
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Erdem A, Muti M, Karadeniz H, Congur G, Canavar E. Electrochemical monitoring of indicator-free DNA hybridization by carbon nanotubes–chitosan modified disposable graphite sensors. Colloids Surf B Biointerfaces 2012; 95:222-8. [DOI: 10.1016/j.colsurfb.2012.02.042] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2011] [Revised: 12/24/2011] [Accepted: 02/29/2012] [Indexed: 02/04/2023]
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20
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Balasubramanian K. Label-free indicator-free nucleic acid biosensors using carbon nanotubes. Eng Life Sci 2012. [DOI: 10.1002/elsc.201100055] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
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22
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Hu F, Chen S, Wang C, Yuan R, Chai Y, Xiang Y, Wang C. ZnO nanoparticle and multiwalled carbon nanotubes for glucose oxidase direct electron transfer and electrocatalytic activity investigation. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.molcatb.2011.07.005] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Li P, Li Y, Yang M. Hyperbranched polycarboxylates and their nanocomposites with ZnO: Investigations on the humidity-sensitive properties. J Appl Polym Sci 2010. [DOI: 10.1002/app.33297] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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24
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Tosar J, Brañas G, Laíz J. Electrochemical DNA hybridization sensors applied to real and complex biological samples. Biosens Bioelectron 2010; 26:1205-17. [DOI: 10.1016/j.bios.2010.08.053] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2010] [Revised: 07/30/2010] [Accepted: 08/17/2010] [Indexed: 11/28/2022]
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25
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26
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Yang T, Jiang C, Zhang W, Jiao K. Improved electrochemical performances of polyaniline nanotubes-poly-L-lysine composite for label-free impedance detection of DNA hybridization. Sci China Chem 2010. [DOI: 10.1007/s11426-010-3162-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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27
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Vicentini DS, Smania A, Laranjeira MC. Chitosan/poly (vinyl alcohol) films containing ZnO nanoparticles and plasticizers. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2010. [DOI: 10.1016/j.msec.2009.01.026] [Citation(s) in RCA: 126] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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28
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Jacobs CB, Peairs MJ, Venton BJ. Review: Carbon nanotube based electrochemical sensors for biomolecules. Anal Chim Acta 2010; 662:105-27. [PMID: 20171310 DOI: 10.1016/j.aca.2010.01.009] [Citation(s) in RCA: 781] [Impact Index Per Article: 55.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2009] [Revised: 12/22/2009] [Accepted: 01/05/2010] [Indexed: 11/30/2022]
Abstract
Carbon nanotubes (CNTs) have been incorporated in electrochemical sensors to decrease overpotential and improve sensitivity. In this review, we focus on recent literature that describes how CNT-based electrochemical sensors are being developed to detect neurotransmitters, proteins, small molecules such as glucose, and DNA. Different types of electrochemical methods are used in these sensors including direct electrochemical detection with amperometry or voltammetry, indirect detection of an oxidation product using enzyme sensors, and detection of conductivity changes using CNT-field effect transistors (FETs). Future challenges for the field include miniaturizing sensors, developing methods to use only a specific nanotube allotrope, and simplifying manufacturing.
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Affiliation(s)
- Christopher B Jacobs
- Dept. of Chemistry, University of Virginia, PO Box 400319, Charlottesville, VA 22904, United States
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QIAO L, GAO R, ZHENG J. Direct Electrochemistry of Hemoglobin Immobilized on Hydrophilic Ionic Liquid-chitosan-ZrO2 Nanoparticles Composite Film with Carbon Ionic Liquid Electrode as the Platform. ANAL SCI 2010; 26:1181-6. [DOI: 10.2116/analsci.26.1181] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Lifang QIAO
- Institute of Analytical Science, Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry, Northwest University
| | - Ruifang GAO
- Institute of Analytical Science, Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry, Northwest University
| | - Jianbin ZHENG
- Institute of Analytical Science, Shaanxi Provincial Key Laboratory of Electroanalytical Chemistry, Northwest University
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30
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Conductive architecture of Fe2O3 microspheres/self-doped polyaniline nanofibers on carbon ionic liquid electrode for impedance sensing of DNA hybridization. Biosens Bioelectron 2009; 25:428-34. [DOI: 10.1016/j.bios.2009.07.032] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2009] [Revised: 07/24/2009] [Accepted: 07/28/2009] [Indexed: 11/17/2022]
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31
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Liu J, Liu J, Yang L, Chen X, Zhang M, Meng F, Luo T, Li M. Nanomaterial-assisted signal enhancement of hybridization for DNA biosensors: a review. SENSORS 2009; 9:7343-64. [PMID: 22399999 PMCID: PMC3290467 DOI: 10.3390/s90907343] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/28/2009] [Revised: 08/31/2009] [Accepted: 09/07/2009] [Indexed: 11/16/2022]
Abstract
Detection of DNA sequences has received broad attention due to its potential applications in a variety of fields. As sensitivity of DNA biosensors is determined by signal variation of hybridization events, the signal enhancement is of great significance for improving the sensitivity in DNA detection, which still remains a great challenge. Nanomaterials, which possess some unique chemical and physical properties caused by nanoscale effects, provide a new opportunity for developing novel nanomaterial-based signal-enhancers for DNA biosensors. In this review, recent progress concerning this field, including some newly-developed signal enhancement approaches using quantum-dots, carbon nanotubes and their composites reported by our group and other researchers are comprehensively summarized. Reports on signal enhancement of DNA biosensors by non-nanomaterials, such as enzymes and polymer reagents, are also reviewed for comparison. Furthermore, the prospects for developing DNA biosensors using nanomaterials as signal-enhancers in future are also indicated.
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Affiliation(s)
- Jinhuai Liu
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +86 551 5591142; Fax: +86 551 5591142
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32
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Luo X, Hsing IM. Electrochemical techniques on sequence-specific PCR amplicon detection for point-of-care applications. Analyst 2009; 134:1957-64. [PMID: 19768201 DOI: 10.1039/b912653h] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nucleic acid based analysis provides accurate differentiation among closely affiliated species and this species- and sequence-specific detection technique would be particularly useful for point-of-care (POC) testing for prevention and early detection of highly infectious and damaging diseases. Electrochemical (EC) detection and polymerase chain reaction (PCR) are two indispensable steps, in our view, in a nucleic acid based point-of-care testing device as the former, in comparison with the fluorescence counterpart, provides inherent advantages of detection sensitivity, device miniaturization and operation simplicity, and the latter offers an effective way to boost the amount of targets to a detectable quantity. In this mini-review, we will highlight some of the interesting investigations using the combined EC detection and PCR amplification approaches for end-point detection and real-time monitoring. The promise of current approaches and the direction for future investigations will be discussed. It would be our view that the synergistic effect of the combined EC-PCR steps in a portable device provides a promising detection technology platform that will be ready for point-of-care applications in the near future.
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Affiliation(s)
- Xiaoteng Luo
- Bioengineering Graduate Program, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
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Zhang X, Guo Q, Cui D. Recent advances in nanotechnology applied to biosensors. SENSORS (BASEL, SWITZERLAND) 2009; 9:1033-53. [PMID: 22399954 PMCID: PMC3280846 DOI: 10.3390/s90201033] [Citation(s) in RCA: 165] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2008] [Revised: 01/15/2009] [Accepted: 01/16/2009] [Indexed: 12/29/2022]
Abstract
In recent years there has been great progress the application of nanomaterials in biosensors. The importance of these to the fundamental development of biosensors has been recognized. In particular, nanomaterials such as gold nanoparticles, carbon nanotubes, magnetic nanoparticles and quantum dots have been being actively investigated for their applications in biosensors, which have become a new interdisciplinary frontier between biological detection and material science. Here we review some of the main advances in this field over the past few years, explore the application prospects, and discuss the issues, approaches, and challenges, with the aim of stimulating a broader interest in developing nanomaterial-based biosensors and improving their applications in disease diagnosis and food safety examination.
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Affiliation(s)
- Xueqing Zhang
- Department of Bio-Nano Science and Engineering, Key Laboratory for Thin Film and Microfabrication Technology of Ministry of Education, National Key Laboratory of Micro /Nano Fabrication Technology, Research Institute of Micro/Nano Science and Technology, Shanghai Jiao Tong University, Shanghai, 200240, P.R. China; E-Mails: (X. Z.); (G. Q)
| | - Qin Guo
- Department of Bio-Nano Science and Engineering, Key Laboratory for Thin Film and Microfabrication Technology of Ministry of Education, National Key Laboratory of Micro /Nano Fabrication Technology, Research Institute of Micro/Nano Science and Technology, Shanghai Jiao Tong University, Shanghai, 200240, P.R. China; E-Mails: (X. Z.); (G. Q)
| | - Daxiang Cui
- Department of Bio-Nano Science and Engineering, Key Laboratory for Thin Film and Microfabrication Technology of Ministry of Education, National Key Laboratory of Micro /Nano Fabrication Technology, Research Institute of Micro/Nano Science and Technology, Shanghai Jiao Tong University, Shanghai, 200240, P.R. China; E-Mails: (X. Z.); (G. Q)
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An Electrochemical DNA Biosensor Developed on a Nanocomposite Platform of Gold and Poly(propyleneimine) Dendrimer. SENSORS 2008; 8:6791-6809. [PMID: 27873900 PMCID: PMC3787416 DOI: 10.3390/s8116791] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2008] [Revised: 10/22/2008] [Accepted: 10/27/2008] [Indexed: 11/26/2022]
Abstract
An electrochemical DNA nanobiosensor was prepared by immobilization of a 20mer thiolated probe DNA on electro-deposited generation 4 (G4) poly(propyleneimine) dendrimer (PPI) doped with gold nanoparticles (AuNP) as platform, on a glassy carbon electrode (GCE). Field emission scanning electron microscopy results confirmed the co-deposition of PPI (which was linked to the carbon electrode surface by C-N covalent bonds) and AuNP ca 60 nm. Voltammetric interrogations showed that the platform (GCE/PPI-AuNP) was conducting and exhibited reversible electrochemistry (E°′ = 235 mV) in pH 7.2 phosphate buffer saline solution (PBS) due to the PPI component. The redox chemistry of PPI was pH dependent and involves a two electron, one proton process, as interpreted from a 28 mV/pH value obtained from pH studies. The charge transfer resistance (Rct) from the electrochemical impedance spectroscopy (EIS) profiles of GCE/PPI-AuNP monitored with ferro/ferricyanide (Fe(CN)63-/4-) redox probe, decreased by 81% compared to bare GCE. The conductivity (in PBS) and reduced Rct (in Fe(CN)63-/4-) values confirmed PPI-AuNP as a suitable electron transfer mediator platform for voltammetric and impedimetric DNA biosensor. The DNA probe was effectively wired onto the GCE/PPI-AuNP via Au-S linkage and electrostatic interactions. The nanobiosensor responses to target DNA which gave a dynamic linear range of 0.01 - 5 nM in PBS was based on the changes in Rct values using Fe(CN)63-/4- redox probe.
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