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Bahadorirad E, Maghsoudi S, Jalali E. Preparation of nanostructured photocatalyst ZnSnO 3@S-doped g-C 3N 4 and its use in DB1 dye degradation through photocatalytic ozonation process. Heliyon 2024; 10:e25451. [PMID: 38352774 PMCID: PMC10861992 DOI: 10.1016/j.heliyon.2024.e25451] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 01/21/2024] [Accepted: 01/26/2024] [Indexed: 02/16/2024] Open
Abstract
This study aimed to investigate the potential of the photocatalytic ozonation process (PCO) for decolorizing DB1(direct blue) dye, a commonly used dye in the textile industry known for its resistance to removal from wastewater. To address this challenge, a ZnSnO3@S-doped g-C3N4 nano photocatalyst was synthesized using a simple hydrothermal method. In a novel approach, a light/O3/ZnSnO3@S-doped g-C3N4 system was employed for the first time to degrade the DB1 dye. BET analysis indicated that the synthesized catalyst exhibited the fifth type of isotherm, typically associated with materials containing mesopores. Under optimized conditions, the PCO process achieved complete decolorization of 70 ppm DB1 dye within just 15 min at a temperature of 25 °C, a gas flow rate of 2.83 ml/s, and a catalyst dosage of 0.003 g, encompassing both removal and photocatalytic contributions. Importantly, the catalyst demonstrated excellent stability and could be reused up to five times. These findings highlight the promising potential of the light/O3/ZnSnO3@S-doped g-C3N4 system in effectively decolorizing DB1 dye, overcoming its resistance, and addressing an important challenge faced by the textile industry in wastewater treatment. The formative nature of this study provides valuable insights into the development of advanced oxidation processes for efficient dye removal.
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Affiliation(s)
- Elaheh Bahadorirad
- Department of Chemistry, Shahid Bahonar University of Kerman, Kerman, Iran, P.O. Box 76169-133, Kerman, Iran
- Young Researchers Society, Shahid Bahonar University of Kerman, Kerman, Iran, P.O. Box 76175-133, Kerman, Iran
| | - Shahab Maghsoudi
- Department of Chemistry, Shahid Bahonar University of Kerman, Kerman, Iran, P.O. Box 76169-133, Kerman, Iran
| | - Elham Jalali
- Department of Chemistry, Shahid Bahonar University of Kerman, Kerman, Iran, P.O. Box 76169-133, Kerman, Iran
- Young Researchers Society, Shahid Bahonar University of Kerman, Kerman, Iran, P.O. Box 76175-133, Kerman, Iran
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An QQ, Feng XZ, Zhan T, Cheng YY, Han GC, Chen Z, Kraatz HB. A simple synthesis of a core-shell structure PPy-Au nanocomposite for immunosensing of C-reactive protein. Talanta 2024; 267:125158. [PMID: 37683320 DOI: 10.1016/j.talanta.2023.125158] [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: 03/11/2023] [Revised: 07/21/2023] [Accepted: 09/02/2023] [Indexed: 09/10/2023]
Abstract
High-sensitivity C-reactive protein (hs-CRP) is an inflammatory biomarker and can accurately predict the development of cardiovascular disease (CVD). We synthesized a core-shell structure PPy-Au nanocomposite in situ by chemically oxidizing pyrrole (Py) with HAuCl4 and the produced Au nanoparticles realized the doping in the polymerization. Analysis of morphology and energy spectrum as well as electrochemical characterization confirmed the successful one-pot synthesis. The conductive polymers with porous structure provide abundant sites for anti-CRP binding and effectively enhanced the sensitivity of the label-free BSA/anti-CRP/PPy-Au/GCE immunosensor. Its analytical performance was observed using differential pulse voltammetry (DPV), with a linear range from 0.0005 to 60 μg mL-1 and a detection limit of 0.17 ng mL-1. The platform demonstrated satisfactory selectivity, stability, and reproducibility. To validate its clinical application, we detected CRP in human serum samples with a recovery rate of 101.00-105.95% and investigated the consistency of the developed method and immunoturbidimetry with a deviation between -1.2% and +3.2%, suggesting great potential for use in point-of-care testing (POCT).
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Affiliation(s)
- Qi-Qi An
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, 541004, PR China
| | - Xiao-Zhen Feng
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, 541004, PR China
| | - Tao Zhan
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, 541004, PR China
| | - Yun-Yun Cheng
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, 541004, PR China
| | - Guo-Cheng Han
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, 541004, PR China.
| | - Zhencheng Chen
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, 541004, PR China.
| | - Heinz-Bernhard Kraatz
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto, Ontario, M1C 1A4, Canada.
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Cheng YY, Feng XZ, Zhan T, An QQ, Han GC, Chen Z, Kraatz HB. A facile indole probe for ultrasensitive immunosensor fabrication toward C-reactive protein sensing. Talanta 2023; 262:124696. [PMID: 37244246 DOI: 10.1016/j.talanta.2023.124696] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 05/15/2023] [Accepted: 05/20/2023] [Indexed: 05/29/2023]
Abstract
C-reactive protein (CRP) is a protein biomarker for acute phase response. Herein, we fabricate a highly sensitive electrochemical immunosensor for CRP on a screen-printed carbon electrode (SPCE) with indole as a novel electrochemical probe and Au nanoparticles for signal amplification. Amongst, indole appeared as transparent nanofilms on the electrode surface, and underwent a one-electron and one-proton transfer to form oxindole during the oxidation process. Upon optimization of experimental conditions, a logarithmic correlation between CRP concentration (0.0001-100 μg∙mL-1) and response current was revealed with a detection limit of 0.03 ng∙mL-1 and a sensitivity of 5.7055 μA∙μg-1∙mL∙cm-2. The sensor exhibited exceptionally distinction selectivity, reproducibility and stability of the electrochemical immunosensor studied. The recovery rate of CRP in human serum samples determined by the standard addition method, ranged between 98.2-102.2%. Overall, the developed immunosensor is promising, and has the potential for CRP detection in real human serum samples.
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Affiliation(s)
- Yun-Yun Cheng
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, 541004, PR China
| | - Xiao-Zhen Feng
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, 541004, PR China
| | - Tao Zhan
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, 541004, PR China
| | - Qi-Qi An
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, 541004, PR China
| | - Guo-Cheng Han
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, 541004, PR China.
| | - Zhencheng Chen
- School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, 541004, PR China.
| | - Heinz-Bernhard Kraatz
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, Toronto, Ontario, M1C 1A4, Canada.
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Syamila N, Syahir A, Sulaiman Y, Ikeno S, Tan WS, Ahmad H, Ahmad Tajudin A. Bio-nanogate manipulation on electrode surface as an electrochemical immunosensing strategy for detecting anti-hepatitis B surface antigen. Bioelectrochemistry 2021; 143:107952. [PMID: 34600402 DOI: 10.1016/j.bioelechem.2021.107952] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 09/14/2021] [Accepted: 09/15/2021] [Indexed: 01/04/2023]
Abstract
The diagnosis of hepatitis B virus (HBV) and monitoring of the vaccination efficiency against HBV require real-time analysis. The presence of antibody against hepatitis B virus surface antigen (anti-HBsAg) as a result of HBV infection and/or immunization may indicate individual immune status towards HBV. This study investigated the ability of a bio-nanogate-based displacement immunosensing strategy in detecting anti-HBsAg antibody, via nonspecific-binding between polyamidoamine dendrimers encapsulated gold nanoparticles (PAMAM-Au) and the 'antigenic determinant' region (aD) of HBsAg. For this purpose, maltose binding protein harbouring the aD region (MBP-aD) was synthesized as a bioreceptor and immobilized on the screen-printed carbon electrode (SPCE). Following that, PAMAM-Au was deposited on MBP-aD, forming the 'gate' and was used as a monitoring agent. Under optimal conditions, the high specificity of anti-HBsAg antibody towards MBP-aD displaced PAMAM-Au causing the decrement of anodic peak in differential pulse voltammetry (DPV) analysis. The signal changes were proportionally related to the concentration of anti-HBsAg antibody, in a range of 1 - 1000 mIU/mL with a limit of detection (LOD) of 2.5 mIU/mL. The results also showed high specificity and selectivity of the immunosensor platform in detecting anti-HBsAg antibody both in spiked buffer and human serum samples.
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Affiliation(s)
- Noor Syamila
- Nanobiotechnology Research Group, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia; Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - Amir Syahir
- Nanobiotechnology Research Group, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia; Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - Yusran Sulaiman
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - Shinya Ikeno
- Department of Biological Functions Engineering, Graduate School of Life Science and System Engineering, Kyushu Institute of Technology, Kitakyushu Science and Research Park, Kitakyushu, Fukuoka, Japan
| | - Wen Siang Tan
- Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia; Laboratory of Vaccines and Biomolecules, Institute of Bioscience, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - Haslina Ahmad
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - Asilah Ahmad Tajudin
- Nanobiotechnology Research Group, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia; Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia.
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Huang X, Guo F, Li M, Ren H, Shi Y, Chen L. Hydrothermal synthesis of ZnSnO3 nanoparticles decorated on g-C3N4 nanosheets for accelerated photocatalytic degradation of tetracycline under the visible-light irradiation. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2019.115854] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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6
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Abstract
Biosensors that depend on a physical or chemical measurement can be adversely affected by non-specific interactions. For example, a biosensor designed to measure specifically the levels of a rare analyte can give false positive results if there is even a small amount of interaction with a highly abundant but irrelevant molecule. To overcome this limitation, the biosensor community has frequently turned to antibody molecules as recognition elements because they are renowned for their exquisite specificity. Unfortunately antibodies can often fail when immobilised on inorganic surfaces, and alternative biological recognition elements are needed. This article reviews the available non-antibody-binding proteins that have been successfully used in electrical and micro-mechanical biosensor platforms.
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Biotechnological approaches toward nanoparticle biofunctionalization. Trends Biotechnol 2013; 32:11-20. [PMID: 24182737 DOI: 10.1016/j.tibtech.2013.09.006] [Citation(s) in RCA: 98] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Revised: 09/18/2013] [Accepted: 09/25/2013] [Indexed: 02/06/2023]
Abstract
Nanomedicine has emerged in the past decade as a promising tool for several therapeutic and diagnostic applications. The development of nanoconjugates containing bioactive ligands specific for targeting cancer cell receptors has become a primary objective of modern nanotechnology. The design of ideal nanoconjugates requires optimization of fundamental parameters including size, shape, ligand shell composition, and reduction in nonspecific protein adsorption. Of great importance is the choice of bioconjugation approach, given that it affects the orientation, accessibility, and bioactivity of the targeting molecule. We provide an overview of recent advances in the immobilization of targeting proteins, focusing on methods to control ligand orientation and density, and highlight criteria for nanoparticle design and development required to achieve enhanced receptor-targeting efficiency.
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Kim HY, Jang KJ, Lee MH. Urine glucose analysis with functionalized graphene oxide as a material for amperometric sensor. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2013; 2013:4510-2. [PMID: 24110736 DOI: 10.1109/embc.2013.6610549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
New functionalized graphene oxide (FGO) was systematically coated on the fabricated Au-PCB for the detection of glucose in urine. The electrical response of FGO-Au-PCB exhibited a wide linearity of 1.7∼44.4 mM of glucose levels and a constant variables was less than 3% of the previously performed multiple measurements. The practical application has been demonstrated by measuring the electrical response against glucose in urine samples. In addition, our findings show similar improvement in urine glucose; within each current level, there were significant improvements in urine glucose. Comparison between the urine glucose and blood glucose showed no significant different level from the same subjects.
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Veerapandian M, Seo YT, Shin H, Yun K, Lee MH. Functionalized graphene oxide for clinical glucose biosensing in urine and serum samples. Int J Nanomedicine 2012; 7:6123-36. [PMID: 23269871 PMCID: PMC3529650 DOI: 10.2147/ijn.s38402] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
A novel clinical glucose biosensor fabricated using functionalized metalloid-polymer (silver-silica coated with polyethylene glycol) hybrid nanoparticles on the surface of a graphene oxide nanosheet is reported. The cyclic voltammetric response of glucose oxidase modification on the surface of a functionalized graphene oxide electrode showed a surface-confined reaction and an effective redox potential near zero volts, with a wide linearity of 0.1–20 mM and a sensitivity of 7.66 μA mM−1 cm−2. The functionalized graphene oxide electrode showed a better electrocatalytic response toward oxidation of H2O2 and reduction of oxygen. The practical applicability of the functionalized graphene oxide electrode was demonstrated by measuring the peak current against multiple urine and serum samples from diabetic patients. This new hybrid nanoarchitecture combining a three-dimensional metalloid-polymer hybrid and two-dimensional graphene oxide provided a thin solid laminate on the electrode surface. The easy fabrication process and retention of bioactive immobilized enzymes on the functionalized graphene oxide electrode could potentially be extended to detection of other biomolecules, and have broad applications in electrochemical biosensing.
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10
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Modification of polypyrrole nanowires array with platinum nanoparticles and glucose oxidase for fabrication of a novel glucose biosensor. Anal Chim Acta 2012; 755:100-7. [DOI: 10.1016/j.aca.2012.09.037] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2012] [Revised: 09/14/2012] [Accepted: 09/22/2012] [Indexed: 11/21/2022]
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11
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Park WM, Choi BG, Huh YS, Hong WH, Lee SY, Park TJ. Facile Functionalization of Colloidal Gold Nanorods by the Specific Binding of an Engineered Protein that Is Preferred over CTAB Bilayers. Chempluschem 2012. [DOI: 10.1002/cplu.201200239] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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12
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Liu W, Wang L, Jiang R. Specific Enzyme Immobilization Approaches and Their Application with Nanomaterials. Top Catal 2012. [DOI: 10.1007/s11244-012-9893-0] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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13
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Cho SD, Im JK, Kim HK, Kim HS, Park HS. Functionalization of reduced graphene oxides by redox-active ionic liquids for energy storage. Chem Commun (Camb) 2012; 48:6381. [PMID: 22617324 DOI: 10.1039/c2cc31636f] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
The reduced graphene oxides (RGOs) functionalized by pyridinium-based ionic liquids (ILs) with SCN anions revealed 6-fold higher capacitance compared to that of RGOs due to the redox behavior of ILs as well as good rate capability and cycle stability despite the appearance of pseudo-capacitance.
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Affiliation(s)
- Sung Dae Cho
- Department of Chemical Engineering, College of Engineering, Kyung Hee University, 1 Seochon-dong, Giheung-gu, Youngin-si, Gyeonggi-do 446-701, Republic of Korea
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14
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Lee SH, Jin HJ, Song HS, Hong S, Park TH. Bioelectronic nose with high sensitivity and selectivity using chemically functionalized carbon nanotube combined with human olfactory receptor. J Biotechnol 2011; 157:467-72. [PMID: 21945089 DOI: 10.1016/j.jbiotec.2011.09.011] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2011] [Revised: 09/02/2011] [Accepted: 09/07/2011] [Indexed: 11/30/2022]
Abstract
Single-walled carbon nanotubes (swCNTs) hold great promise for use as molecular wires because they exhibit high electrical conductivity and chemical stability. However, constructing swCNT-based transducer devices requires controlled strategies for assembling biomolecules on swCNTs. In this study, we proposed a chemically modified swCNT. The swCNT was functionalized with 1,5-diaminonaphthalene via π-stacking, for reliable attachment of the human olfactory receptor 2AG1 (hOR2AG1). The human olfactory receptor was then anchored. We investigated the use of this functionalized CNT in the fabrication of a highly sensitive and selective bioelectronic nose. For the bioelectronic nose, the swCNT-field effect transistor (FET) platform was composed of polyethylene glycol (PEG)-coated regions to prevent non-specific absorption and chemically modified swCNTs regions containing hOR2AG1, which can bind to the specific odorant. This approach allowed us to create well-defined micron-scale patterns of hOR2AG1 on the swCNTs. Our bioelectronic nose displayed ultrahigh sensitivity down to concentrations as low as 1fM due to the enhanced hOR2AG1-odorant interaction through the tight binding of hOR2AG1 on the chemically modified swCNTs. In addition, the approach described here may provide an alternative route for multiplexed detection of diverse odorants and to improve the sensitivity of sensor devices.
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Affiliation(s)
- Sang Hun Lee
- School of Chemical and Biological Engineering, Bio-MAX Institute, Seoul National University, Seoul 151-742, Republic of Korea
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15
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Veerapandian M, Subbiah R, Lim GS, Park SH, Yun K, Lee MH. Copper-glucosamine microcubes: synthesis, characterization, and C-reactive protein detection. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:8934-8942. [PMID: 21648471 DOI: 10.1021/la2009495] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Cubelike microstructures of glucosamine-functionalized copper (GlcN-CuMC's) have been fabricated by the integration of injection pump and ultrasonochemistry. Although bulk microstructures and the nanostructure of metallic copper exhibit distinct applications, the amino sugar surface-functionalized copper is almost biocompatible and exhibits advanced features such as more crystallinity, high thermal stability, and electrochemical feasibility toward biomolecule (C-reactive protein, CRP) detection. An electrochemical test of this GlcN-CuMC's was demonstrated by immobilization on a conventional gold-PCB (Au-PCB) electrode. The combination of a biointerface membrane, from glucosamine functionalization, and electroactive sites of metallic copper provides a very efficient electrochemical response against various concentration of CRP. A perfect scaling of steady-state currents with r(2) values of 0.9862 (I(pa)) and 0.9972 (I(pc)) indicate the promise of this kind of biofunctionalized microstructure electrode for many surface and interface applications.
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Affiliation(s)
- Murugan Veerapandian
- Department of Bionanotechnology, Kyungwon University, Gyeonggi, Republic of Korea
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16
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Martis P, Venugopal B, Delhalle J, Mekhalif Z. Selective decoration of nickel and nickel oxide nanocrystals on multiwalled carbon nanotubes. J SOLID STATE CHEM 2011. [DOI: 10.1016/j.jssc.2011.03.036] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Liquid phase deposition of hemoglobin/SDS/TiO2 hybrid film preserving photoelectrochemical activity. Bioelectrochemistry 2011; 81:34-8. [DOI: 10.1016/j.bioelechem.2011.01.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2010] [Revised: 01/18/2011] [Accepted: 01/22/2011] [Indexed: 11/19/2022]
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Kim SK, Kwen HD, Choi SH. Fabrication of a microbial biosensor based on QD-MWNT supports by a one-step radiation reaction and detection of phenolic compounds in red wines. SENSORS (BASEL, SWITZERLAND) 2011; 11:2001-12. [PMID: 22319395 PMCID: PMC3274030 DOI: 10.3390/s110202001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2010] [Revised: 01/04/2011] [Accepted: 02/06/2011] [Indexed: 11/16/2022]
Abstract
An Acaligense sp.-immobilized biosensor was fabricated based on QD-MWNT composites as an electron transfer mediator and a microbe immobilization support by a one-step radiation reaction and used for sensing phenolic compounds in commercial red wines. First, a quantum dot-modified multi-wall carbon nanotube (QD-MWNT) composite was prepared in the presence of MWNT by a one-step radiation reaction in an aqueous solution at room temperature. The successful preparation of the QD-MWNT composite was confirmed by XPS, TEM, and elemental analysis. Second, the microbial biosensor was fabricated by immobilization of Acaligense sp. on the surface of the composite thin film of a glassy carbon (GC) electrode, which was prepared by a hand casting method with a mixture of the previously obtained composite and Nafion solution. The sensing ranges of the microbial biosensor based on CdS-MWNT and Cu(2)S-MWNT supports were 0.5-5.0 mM and 0.7-10 mM for phenol in a phosphate buffer solution, respectively. Total concentration of phenolic compounds contained in commercial red wines was also determined using the prepared microbial immobilized biosensor.
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Affiliation(s)
- Seul-Ki Kim
- Department of Chemistry, Hannam University, Daejeon 305-811, Korea; E-Mails: (S.-K.K.); (H.-D.K.)
| | - Hai-Doo Kwen
- Department of Chemistry, Hannam University, Daejeon 305-811, Korea; E-Mails: (S.-K.K.); (H.-D.K.)
| | - Seong-Ho Choi
- Department of Chemistry, Hannam University, Daejeon 305-811, Korea; E-Mails: (S.-K.K.); (H.-D.K.)
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Abstract
The application of nanotechnology has opened a new realm of advancement in the field of regenerative medicine and has provided hope for the culmination of long-felt needs by the development of an ideal means to control the biochemical and mechanical microenvironment for successful cell delivery and tissue regeneration. Both top-down and bottom-up approaches have been widely used in the advancement of this field, be it by improvement in scaffolds for cell growth, development of new and efficient delivery devices, cellular modification and tracking applications or by development of nanodevices such as biosensors. The current review elaborates the various nanomaterials used in regenerative medicine with a special focus on the development of this field during the last 5 years and the recent advances in their aforementioned applications. Furthermore, the key issues and challenges in using nanotechnology-based approaches are highlighted with an outlook on the likely future of nano-assisted regenerative medicine.
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Affiliation(s)
- Shalini Verma
- Department of Pharmaceutics, National Institute of Pharmaceutical Education & Research (NIPER), Sector-67, SAS Nagar (Mohali) 160062, Punjab, India
| | - Abraham J Domb
- Department of Medicinal Chemistry, School of Pharmacy-Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 91120, Israel
| | - Neeraj Kumar
- Department of Pharmaceutics, National Institute of Pharmaceutical Education & Research (NIPER), Sector-67, SAS Nagar (Mohali) 160062, Punjab, India
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