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Wang J, Zhang L, Yan G, Cheng L, Zhang F, Wu J, Lei Y, An Q, Qi H, Zhang C, Gao Q. Modified exfoliated graphene functionalized with carboxylic acid-group and thionine on a screen-printed carbon electrode as a platform for an electrochemical enzyme immunosensor. Mikrochim Acta 2024; 191:143. [PMID: 38368295 DOI: 10.1007/s00604-024-06212-8] [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: 10/31/2023] [Accepted: 01/11/2024] [Indexed: 02/19/2024]
Abstract
An enzyme immunoassay was developed based on the coulometric measurement of immunoglobulin M (IgM) against Hantaan viruses (HTNV) by using virus-like particles (VLPs) as recognition molecules. The surface functionalization of screen-printed carbon electrodes (SPCEs) was achieved through paste-exfoliated graphene that was modified with a COOH group and a thionine mediator through supramolecular-covalent scaffolds, on SPCEs by using the binder contained in the ink. After the covalent immobilization of the antibody, the sensor was used for the sandwich enzyme immunoassay of IgM against HTNV. By using HTNV VLPs as the second recognization molecules, the resulting sensor efficiently monitored the reaction of IgM against HTNV and anti-IgM antibody with high specificity. By attaching HTNV nucleocapsid protein antibody conjugate with horseradish peroxidase (HRP) onto VLPs, the signal response of the assay was derived from the coulometric measurement of H2O2 reduction mediated by thionine on the electrode surface after the application of a potential (- 0.2 V vs. Ag/AgCl). The ratio of charges measured before or after H2O2 addition was used to quantify IgM because these charges could be used as background charges or total charges, respectively. The ratio exhibited good agreement with IgM concentration within a range 0.1 to 1000 pg mL-1, and a detection limit of 0.06 pg mL-1 was obtained. The assay demonstrated high sensitivity and specificity toward HTNV-specific IgM in serum.
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Affiliation(s)
- Jing Wang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Liang Zhang
- Department of Microbiology, Faculty of Preclinical Medicine, Air Force Medical University, Xi'an, 710032, Shaanxi, China
| | - Guanrong Yan
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Linfeng Cheng
- Department of Microbiology, Faculty of Preclinical Medicine, Air Force Medical University, Xi'an, 710032, Shaanxi, China
| | - Fanglin Zhang
- Department of Microbiology, Faculty of Preclinical Medicine, Air Force Medical University, Xi'an, 710032, Shaanxi, China.
| | - Jialin Wu
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Yingfeng Lei
- Department of Microbiology, Faculty of Preclinical Medicine, Air Force Medical University, Xi'an, 710032, Shaanxi, China
| | - Qunxing An
- Department of Transfusion Medicine, The First Affiliated Hospital of Air Force Medical University, Xi'an, 710032, Shaanxi, China.
| | - Honglan Qi
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Chengxiao Zhang
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, China
| | - Qiang Gao
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an, 710062, China.
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2
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Wu X, Li Y, Chen L, Zhao J, Wu B, Zhang ZB. Simultaneous exfoliation and colloidal formation of few-layer semiconducting MoS2 sheets in water. Chem Commun (Camb) 2020; 56:2035-2038. [DOI: 10.1039/c9cc08800h] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple method allowing for simultaneous liquid-phase exfoliation of MoS2 crystals into few-layer sheets and colloidal formation of the exfoliated sheets is reported.
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Affiliation(s)
- Xutao Wu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education
- College of Chemistry and Materials Science
- Northwest University
- 710069 Xi’an
- People's Republic of China
| | - Yuan Li
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education
- College of Chemistry and Materials Science
- Northwest University
- 710069 Xi’an
- People's Republic of China
| | - Libo Chen
- Division of Solid-State Electronics
- Department of Electrical Engineering
- Uppsala University
- SE-751 21 Uppsala
- Sweden
| | - Jie Zhao
- Division of Solid-State Electronics
- Department of Electrical Engineering
- Uppsala University
- SE-751 21 Uppsala
- Sweden
| | - Biao Wu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education
- College of Chemistry and Materials Science
- Northwest University
- 710069 Xi’an
- People's Republic of China
| | - Zhi-Bin Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry of the Ministry of Education
- College of Chemistry and Materials Science
- Northwest University
- 710069 Xi’an
- People's Republic of China
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3
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Heard KW, Bartlam C, Williams CD, Zhang J, Alwattar AA, Little MS, Parry AVS, Porter FM, Vincent MA, Hillier IH, Siperstein FR, Vijayaraghavan A, Yeates SG, Quayle P. Initial Studies Directed toward the Rational Design of Aqueous Graphene Dispersants. ACS OMEGA 2019; 4:1969-1981. [PMID: 31459448 PMCID: PMC6648898 DOI: 10.1021/acsomega.8b03147] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Accepted: 12/14/2018] [Indexed: 05/31/2023]
Abstract
This study presents preliminary experimental data suggesting that sodium 4-(pyrene-1-yl)butane-1-sulfonate (PBSA), 5, an analogue of sodium pyrene-1-sulfonate (PSA), 1, enhances the stability of aqueous reduced graphene oxide (RGO) graphene dispersions. We find that RGO and exfoliated graphene dispersions prepared in the presence of 5 are approximately double the concentration of those made with commercially available PSA, 1. Quantum mechanical and molecular dynamics simulations provide key insights into the behavior of these molecules on the graphene surface. The seemingly obvious introduction of a polar sulfonate head group linked via an appropriate alkyl spacer to the aromatic core results in both more efficient binding of 5 to the graphene surface and more efficient solvation of the polar head group by bulk solvent (water). Overall, this improves the stabilization of the graphene flakes by disfavoring dissociation of the stabilizer from the graphene surface and inhibiting reaggregation by electrostatic and steric repulsion. These insights are currently the subject of further investigations in an attempt to develop a rational approach to the design of more effective dispersing agents for rGO and graphene in aqueous solution.
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Affiliation(s)
- Kane W.
J. Heard
- School
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Cian Bartlam
- School
of Materials and National Graphene Institute, The University of Manchester, Manchester M13 9PL, U.K.
| | - Christopher D. Williams
- School
of Chemical Engineering and Analytical Science, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Junru Zhang
- School
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Aula A. Alwattar
- School
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
- College
of Science, University of Basrah, Garmat Ali, 61004 Basrah, Iraq
| | - Mark S. Little
- School
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Adam V. S. Parry
- School
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Fiona M. Porter
- School
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Mark A. Vincent
- School
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Ian H. Hillier
- School
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Flor R. Siperstein
- School
of Chemical Engineering and Analytical Science, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Aravind Vijayaraghavan
- School
of Materials and National Graphene Institute, The University of Manchester, Manchester M13 9PL, U.K.
| | - Stephen G. Yeates
- School
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
| | - Peter Quayle
- School
of Chemistry, The University of Manchester, Oxford Road, Manchester M13 9PL, U.K.
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4
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Gkermpoura SS, Papadimitriou KD, Skountzos EN, Polyzos I, Pastore Carbone MG, Kotrotsos A, Mavrantzas VG, Galiotis C, Tsitsilianis C. 3-Arm star pyrene-functional PMMAs for efficient exfoliation of graphite in chloroform: fabrication of graphene-reinforced fibrous veils. NANOSCALE 2019; 11:915-931. [PMID: 30298899 DOI: 10.1039/c8nr06888g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
3-Arm PMMAs end-functionalized by pyrene were designed as dispersing/stabilizing agents for the liquid-phase exfoliation of graphite in low-boiling point solvents like chloroform. The synthetic procedure comprised ARGET ATRP controlled polymerization, click chemistry and the quaternization reaction of triazole, ensuring tailor-made, well-defined pyrene-functional star PMMAs. Among a series of different pyrene-functional macromolecular topologies, the (PMMA-py2)3 proved the most efficient exfoliation agent giving relatively high graphene concentration (0.36 mg ml-1) at exceptionally low polymer/graphite mass ratio (mP/mGF = 0.003) and short sonication time (3 h). A 5-cycle iterative procedure relying on the redispersion of the sediment was developed yielding CG = 1.29 mg ml-1 with 14.8% exfoliation yield, under the favorable conditions of 10.5 h total shear mixing/tip sonication time and overall mP/mGF ratio as low as 0.15. In parallel, all-atom molecular dynamics simulations were conducted which helped understand the mechanism by which pyrene-functional macromolecular topologies act as efficient dispersing agents of graphene. Finally the G@(PMMA-Py)3 hybrids were well dispersed into the PMMA matrix by electrospinning to fabricate graphene-based nanocomposite fibrous veils. These graphene/polymer nanocomposites exhibited enhanced stiffness and strength by a factor of 4.4 with 1.5 wt% graphene hybrids as nanofillers.
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Affiliation(s)
- Sandra S Gkermpoura
- Department of Chemical Engineering, Universty of Patras, GR - 26504, Patras, Greece.
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5
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Water Dispersible Few-Layer Graphene Stabilized by a Novel Pyrene Derivative at Micromolar Concentration. NANOMATERIALS 2018; 8:nano8090675. [PMID: 30200191 PMCID: PMC6163987 DOI: 10.3390/nano8090675] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 08/22/2018] [Accepted: 08/27/2018] [Indexed: 11/19/2022]
Abstract
The search for graphene or few-layer graphene production methods that are simple, allow mass production, and yield good quality material continues to provoke intense investigation. The present work contributes to this investigation through the study of the aqueous exfoliation of four types of graphene sources, which are namely graphite and graphite nanoflakes with different morphologies and geographical origins. The exfoliation was achieved in an aqueous solution of a soluble pyrene derivative that was synthesized to achieve maximum interaction with the graphene surface at low concentration (5 × 10−5 M). The yield of bilayer and few-layer graphene obtained was quantified by Raman spectroscopic analysis, and the adsorption of the pyrene derivative on the graphene surface was studied by thermogravimetric analysis and X-ray diffraction. The whole procedure was rationalized with the help of molecular modeling.
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6
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Yoonessi M, Gaier JR, Sahimi M, Daulton TL, Kaner RB, Meador MA. Fabrication of Graphene-Polyimide Nanocomposites with Superior Electrical Conductivity. ACS APPLIED MATERIALS & INTERFACES 2017; 9:43230-43238. [PMID: 29168637 DOI: 10.1021/acsami.7b12104] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We report on the fabrication of a novel class of lightweight materials, polyimide-graphene nanocomposites (0.01-5 vol %), with tunable electrical conductivity. The graphene-polyimide nanocomposites exhibit an ultra-low graphene percolation threshold of 0.03 vol % and maximum dc conductivity of 0.94 S/cm, which we attribute to excellent dispersion, extraordinary electron transport in the well-dispersed graphene, high number density of graphene nanosheets, and the π-π interactions between the aromatic moieties of the polyimide and the carbon rings in graphene. The dc conductivity data are shown to follow the power-law dependence on the graphene volume fraction near the percolation threshold. The ac conductivity of the nanocomposites is accurately represented by the extended pair-approximation model. The exponent s of the approximation is estimated to be 0.45-0.61, indicating anomalous diffusion of charge particles and a fractal structure for the conducting phase, lending support to the percolation model. Low-temperature dc conductivity of the nanocomposites is well-approximated by the thermal fluctuation-induced tunneling. Wide-angle X-ray scattering and transmission electron microscopy were utilized to correlate the morphology with the electrical conductivity. The lack of maxima in X-ray indicates the loss of structural registry and short-range ordering.
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Affiliation(s)
- Mitra Yoonessi
- Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095, United States
| | - James R Gaier
- NASA Glenn Research Center , Cleveland, Ohio 44135, United States
| | - Muhammad Sahimi
- Department of Chemical Engineering and Materials Science, University of Southern California , Los Angeles, California 90089, United States
| | - Tyrone L Daulton
- Department of Physics, Institute for Materials Science & Engineering, Washington University in St. Louis , St. Louis, Missouri 63130, United States
| | - Richard B Kaner
- Department of Chemistry and Biochemistry, University of California , Los Angeles, California 90095, United States
| | - Michael A Meador
- NASA Glenn Research Center , Cleveland, Ohio 44135, United States
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7
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Zhang Y, Ma R, Zhen XV, Kudva YC, Bühlmann P, Koester SJ. Capacitive Sensing of Glucose in Electrolytes Using Graphene Quantum Capacitance Varactors. ACS APPLIED MATERIALS & INTERFACES 2017; 9:38863-38869. [PMID: 29023095 DOI: 10.1021/acsami.7b14864] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
A novel graphene-based variable capacitor (varactor) that senses glucose based on the quantum capacitance effect was successfully developed. The sensor utilizes a metal-oxide-graphene varactor device structure that is inherently compatible with passive wireless sensing, a key advantage for in vivo glucose sensing. The graphene varactors were functionalized with pyrene-1-boronic acid (PBA) by self-assembly driven by π-π interactions. Successful surface functionalization was confirmed by both Raman spectroscopy and capacitance-voltage characterization of the devices. Through glucose binding to the PBA, the glucose concentration in the buffer solutions modulates the level of electrostatic doping of the graphene surface to different degrees, which leads to capacitance changes and Dirac voltage shifts. These responses to the glucose concentration were shown to be reproducible and reversible over multiple measurement cycles, suggesting promise for eventual use in wireless glucose monitoring.
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Affiliation(s)
- Yao Zhang
- Department of Chemistry, University of Minnesota , 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Rui Ma
- Department of Electrical & Computer Engineering, University of Minnesota , 200 Union Street SE, Minneapolis, Minnesota 55455, United States
| | - Xue V Zhen
- Department of Chemistry, University of Minnesota , 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Yogish C Kudva
- Division of Endocrinology, Mayo Clinic , 200 First Street SW, Rochester, Minnesota 55905, United States
| | - Philippe Bühlmann
- Department of Chemistry, University of Minnesota , 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Steven J Koester
- Department of Electrical & Computer Engineering, University of Minnesota , 200 Union Street SE, Minneapolis, Minnesota 55455, United States
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8
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Xu Y, Fei J, Li G, Yuan T, Li J. Compartmentalized Assembly of Motor Protein Reconstituted on Protocell Membrane toward Highly Efficient Photophosphorylation. ACS NANO 2017; 11:10175-10183. [PMID: 28933821 DOI: 10.1021/acsnano.7b04747] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Molecule assembly and functionalization of protocells have achieved a great success. However, the yield efficiency of photophosphorylation in the present cell-like systems is limited. Herein, inspired by natural photobacteria, we construct a protocell membrane reconstituting motor protein for highly efficient light-mediated adenosine triphosphate (ATP) synthesis through a layer-by-layer technique. The assembled membrane, compartmentally integrating photoacid generator, proton conductor, and ATP synthase, possesses excellent transparency, fast proton production, and quick proton transportation. Remarkably, these favorable features permit the formation of a large proton gradient in a confined region to drive ATP synthase to produce ATP with high efficiency (873 ATP s-1). It is the highest among the existing artificial photophosphorylation systems. Such a biomimetic system provides a bioenergy-supplying scenario for early photosynthetic life and holds promise in remotely controlled ATP-consumed biosensors, biocatalysts, and biodevices.
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Affiliation(s)
- Youqian Xu
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Jinbo Fei
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
| | - Guangle Li
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Tingting Yuan
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
- University of Chinese Academy of Sciences , Beijing 100049, China
| | - Junbai Li
- Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China
- University of Chinese Academy of Sciences , Beijing 100049, China
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9
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Morimoto D, Yoshida H, Sato K, Saito K, Yagi M, Takagi S, Yui T. Light Energy Accumulation from Pyrene Derivative to Tris(bipyridine)ruthenium on Clay Surface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:3680-3684. [PMID: 28351149 DOI: 10.1021/acs.langmuir.7b00512] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A novel type of energy donor-acceptor system on a clay surface has been prepared. The energy transfer between an energy-donating cationic pyrene derivative (An-Py2+) and an energy-accepting tris(bipyridine)ruthenium complex (Ru2+) on the clay surface was investigated using absorption, emission, and lifetime measurements. An obvious energy transfer was observed, and one Ru2+ molecule quenched the emission from five molecules of An-Py2+ with an emission quenching efficiency of 85% on the clay surface. This suggests that the light energies absorbed by five of the An-Py2+ molecules were accumulated in the one Ru2+ molecule. Near-quantitative emission quenching was observed for stoichiometric amounts of An-Py2+ and Ru2+. The apparent quenching rate constant is approximately 1017 L mol-1 s-1, and thus the quenching rate constant is 107-108 times higher than the diffusion rate constant in a homogeneous solution.
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Affiliation(s)
- Daiki Morimoto
- Department of Materials Science and Technology, Faculty of Engineering, Niigata University , 8050 Ikarashi-2, Niigata 950-2181, Japan
| | - Haruya Yoshida
- Department of Materials Science and Technology, Faculty of Engineering, Niigata University , 8050 Ikarashi-2, Niigata 950-2181, Japan
| | - Keita Sato
- Department of Materials Science and Technology, Faculty of Engineering, Niigata University , 8050 Ikarashi-2, Niigata 950-2181, Japan
| | - Kenji Saito
- Department of Materials Science and Technology, Faculty of Engineering, Niigata University , 8050 Ikarashi-2, Niigata 950-2181, Japan
| | - Masayuki Yagi
- Department of Materials Science and Technology, Faculty of Engineering, Niigata University , 8050 Ikarashi-2, Niigata 950-2181, Japan
| | - Shinsuke Takagi
- Department of Applied Chemistry, Graduate Course of Urban Environmental Sciences, Tokyo Metropolitan University , Minami-ohsawa 1-1, Hachiohji, Tokyo 192-0397, Japan
| | - Tatsuto Yui
- Department of Materials Science and Technology, Faculty of Engineering, Niigata University , 8050 Ikarashi-2, Niigata 950-2181, Japan
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