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Yadegari A, Khezri J, Esfandiari S, Mahdavi H, Karkhane AA, Rahighi R, Heidarimoghadam R, Tayebi L, Hashemi E, Farmany A. Bottom-up synthesis of nitrogen and oxygen co-decorated carbon quantum dots with enhanced DNA plasmid expression. Colloids Surf B Biointerfaces 2019; 184:110543. [PMID: 31627102 DOI: 10.1016/j.colsurfb.2019.110543] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Revised: 09/28/2019] [Accepted: 10/01/2019] [Indexed: 01/16/2023]
Abstract
In this paper, a bottom-up hydrothermal route is reported for the synthesis of oxygen and nitrogen co-decorated carbon quantum dots (CQDs) using ammonium hydrogen citrate (AHC) as a single precursor. DLS data approved the formation of 4.0 nm (average size) CQDs. XRD pattern shows the interlayer spacing (002) of 3.5 Å for CQDs, which is exactly the same as that of crystalline graphite. XPS and FTIR spectra verified the formation of oxygen and nitrogen functional groups on the CQDs surface. Co-decorated carboxyl, hydroxyl and amine groups on the CQDs surfaces make them as promising polyelectrolyte for gene delivery. Toxicity assay showed a survival rate of 70% under different incubation times and up to 500 μg/mL. The highly water-soluble, stable fluorescence and low toxic CQDs increased the gene expression of DNA plasmid in E. coli bacteria 4-fold more than the control group.
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Affiliation(s)
- Amir Yadegari
- School of Dentistry, Marquette University, Milwaukee, WI, 53233, USA
| | - Jafar Khezri
- National Research Center for Transgenic Mouse National Institute of Genetic Engineering and Biotechnology, P.O. Box: 14965-161, Tehran, Iran
| | - Sadaf Esfandiari
- National Research Center for Transgenic Mouse National Institute of Genetic Engineering and Biotechnology, P.O. Box: 14965-161, Tehran, Iran
| | - Hossein Mahdavi
- School of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Ali Asghar Karkhane
- National Research Center for Transgenic Mouse National Institute of Genetic Engineering and Biotechnology, P.O. Box: 14965-161, Tehran, Iran
| | - Reza Rahighi
- Department of Physics, Sharif University of Technology, P.O. Box 11155-9161, Tehran, Iran; Department of Research and Development, Sharif Ultrahigh Nanotechnologists (SUN) Company, P.O. Box: 13488-96394, Tehran, Iran
| | - Rashid Heidarimoghadam
- Department of Ergonomics, Faculty of Health and Medical Sciences Research Centre, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Lobat Tayebi
- School of Dentistry, Marquette University, Milwaukee, WI, 53233, USA
| | - Ehsan Hashemi
- National Research Center for Transgenic Mouse National Institute of Genetic Engineering and Biotechnology, P.O. Box: 14965-161, Tehran, Iran; Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences Institute, Tehran University of Medical Sciences, Tehran, Iran.
| | - Abbas Farmany
- Dental Research Center, Hamadan University of Medical Sciences, Hamadan, Iran.
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Low field magneto-tunable photocurrent in CoFe 2O 4 nanostructure films for enhanced photoelectrochemical properties. Sci Rep 2018; 8:6522. [PMID: 29695871 PMCID: PMC5916887 DOI: 10.1038/s41598-018-24947-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 03/15/2018] [Indexed: 12/16/2022] Open
Abstract
Efficient solar to hydrogen conversion using photoelectrochemical (PEC) process requires semiconducting photoelectrodes with advanced functionalities, while exhibiting high optical absorption and charge transport properties. Herein, we demonstrate magneto-tunable photocurrent in CoFe2O4 nanostructure film under low applied magnetic fields for efficient PEC properties. Photocurrent is enhanced from ~1.55 mA/cm2 to ~3.47 mA/cm2 upon the application of external magnetic field of 600 Oe leading to ~123% enhancement. This enhancement in the photocurrent is attributed to the reduction of optical bandgap and increase in the depletion width at CoFe2O4/electrolyte interface resulting in an enhanced generation and separation of the photoexcited charge carriers. The reduction of optical bandgap in the presence of magnetic field is correlated to the shifting of Co2+ ions from octahedral to tetrahedral sites which is supported by the Raman spectroscopy results. Electrochemical impedance spectroscopy results confirm a decrease in the charge transfer resistance at the CoFe2O4/electrolyte interface in the presence of magnetic field. This work evidences a coupling of photoexcitation properties with magnetic properties of a ferromagnetic-semiconductor and the effect can be termed as magnetophototronic effect.
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Kim K, Yu S, Kim SW, Kim T, Kim SM, Kang SY, Han SM, Jang JH. Highly transparent poly(glycidyl methacrylate-co-acryloisobutyl POSS) for 100 μm-thick submicron patterns with an aspect ratio over 100. Chem Commun (Camb) 2017; 53:8172-8175. [PMID: 28677704 DOI: 10.1039/c7cc02937c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
This is the first report on the fabrication of defect-free submicron structures with more than 100 μm thickness and an aspect ratio over 100. Highly transparent poly(glycidyl methacrylate-co-acryloisobutyl POSS) (PGP) was synthesized via radical polymerization. The mechanical properties of the PGP submicron structure displayed a Young's modulus of 6.09 GPa and a hardness of 0.16 GPa, 4.2 and 8 times, respectively, than those of SU8 nanopatterns. These enhancements enable the utilization of ultrathick 2D-/3D-submicron structures as an ideal platform for microelectromechanical systems, big data storage systems, energy devices, etc.
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Affiliation(s)
- Kwanghyun Kim
- School of Energy and Chemical Engineering, Low Dimensional Carbon Materials Center, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea.
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Photoelectrocatalysis of Rhodamine B and Solar Hydrogen Production by TiO 2 and Pd/TiO 2 Catalyst Systems. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.02.035] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Li Q, Wang F, Sun L, Jiang Z, Ye T, Chen M, Bai Q, Wang C, Han X. Design and Synthesis of Cu@CuS Yolk-Shell Structures with Enhanced Photocatalytic Activity. NANO-MICRO LETTERS 2017; 9:35. [PMID: 30393730 PMCID: PMC6199031 DOI: 10.1007/s40820-017-0135-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 01/26/2017] [Indexed: 05/03/2023]
Abstract
Non-spherical Cu@CuS yolk-shell structures are successfully obtained using Cu2O cube templates in a process combining rapid surface sulfidation followed by disproportionation of the Cu2O core upon treatment with a hydrochloric acid solution. By employing the above method, Cu@CuS yolk-shell structures with different morphologies, including octahedral, truncated octahedral, and cuboctahedral shapes, can be synthesized. The void space within the hollow structures provides a unique confined space, where the metallic copper present in the core of a shell can be protected from agglomeration and oxidation. Furthermore, the presence of metal copper in these hollow structures contributes to improvement in the photocatalytic properties of these materials. The application of these Cu@CuS structures indeed shows clearly improved photocatalytic performance.
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Affiliation(s)
- Qiuyan Li
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Department of Chemistry, School of Chemistry and Chemical Engineering, Jiangsu Normal University, Xuzhou, 221116 People’s Republic of China
| | - Fan Wang
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Department of Chemistry, School of Chemistry and Chemical Engineering, Jiangsu Normal University, Xuzhou, 221116 People’s Republic of China
| | - Linqiang Sun
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Department of Chemistry, School of Chemistry and Chemical Engineering, Jiangsu Normal University, Xuzhou, 221116 People’s Republic of China
| | - Zhe Jiang
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Department of Chemistry, School of Chemistry and Chemical Engineering, Jiangsu Normal University, Xuzhou, 221116 People’s Republic of China
| | - Tingting Ye
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Department of Chemistry, School of Chemistry and Chemical Engineering, Jiangsu Normal University, Xuzhou, 221116 People’s Republic of China
| | - Meng Chen
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Department of Chemistry, School of Chemistry and Chemical Engineering, Jiangsu Normal University, Xuzhou, 221116 People’s Republic of China
| | - Qiang Bai
- College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042 People’s Republic of China
| | - Chao Wang
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Department of Chemistry, School of Chemistry and Chemical Engineering, Jiangsu Normal University, Xuzhou, 221116 People’s Republic of China
| | - Xiguang Han
- Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Department of Chemistry, School of Chemistry and Chemical Engineering, Jiangsu Normal University, Xuzhou, 221116 People’s Republic of China
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Padoin N, Andrade L, Ângelo J, Mendes A, Moreira RDFPM, Soares C. Intensification of photocatalytic pollutant abatement in microchannel reactor using TiO2and TiO2-graphene. AIChE J 2016. [DOI: 10.1002/aic.15262] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Natan Padoin
- LEMA - Dept. de Engenharia Química e Engenharia de Alimentos, Universidade Federal de Santa Catarina, Campus Universitário Reitor João David Ferreira Lima; 88040-900 Florianópolis-SC Brasil
| | - Luísa Andrade
- LEPABE - Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias; 4200-465 Porto Portugal
| | - Joana Ângelo
- LEPABE - Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias; 4200-465 Porto Portugal
| | - Adélio Mendes
- LEPABE - Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias; 4200-465 Porto Portugal
| | - Regina de Fátima Peralta Muniz Moreira
- LEMA - Dept. de Engenharia Química e Engenharia de Alimentos, Universidade Federal de Santa Catarina, Campus Universitário Reitor João David Ferreira Lima; 88040-900 Florianópolis-SC Brasil
| | - Cíntia Soares
- LEMA - Dept. de Engenharia Química e Engenharia de Alimentos, Universidade Federal de Santa Catarina, Campus Universitário Reitor João David Ferreira Lima; 88040-900 Florianópolis-SC Brasil
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Collins G, Armstrong E, McNulty D, O’Hanlon S, Geaney H, O’Dwyer C. 2D and 3D photonic crystal materials for photocatalysis and electrochemical energy storage and conversion. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2016; 17:563-582. [PMID: 27877904 PMCID: PMC5111560 DOI: 10.1080/14686996.2016.1226121] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 08/14/2016] [Accepted: 08/16/2016] [Indexed: 05/20/2023]
Abstract
This perspective reviews recent advances in inverse opal structures, how they have been developed, studied and applied as catalysts, catalyst support materials, as electrode materials for batteries, water splitting applications, solar-to-fuel conversion and electrochromics, and finally as photonic photocatalysts and photoelectrocatalysts. Throughout, we detail some of the salient optical characteristics that underpin recent results and form the basis for light-matter interactions that span electrochemical energy conversion systems as well as photocatalytic systems. Strategies for using 2D as well as 3D structures, ordered macroporous materials such as inverse opals are summarized and recent work on plasmonic-photonic coupling in metal nanoparticle-infiltrated wide band gap inverse opals for enhanced photoelectrochemistry are provided.
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Affiliation(s)
- Gillian Collins
- Department of Chemistry, University College Cork, Cork, Ireland
| | - Eileen Armstrong
- Department of Life Science, Institute of Technology, Sligo, Ireland
| | - David McNulty
- Department of Chemistry, University College Cork, Cork, Ireland
| | - Sally O’Hanlon
- Department of Chemistry, University College Cork, Cork, Ireland
| | - Hugh Geaney
- Department of Chemistry, University College Cork, Cork, Ireland
| | - Colm O’Dwyer
- Department of Chemistry, University College Cork, Cork, Ireland
- Micro-Nano Systems Centre, Tyndall National Institute, Cork, Ireland
- Corresponding author:
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Ansari SA, Ansari MS, Cho MH. Metal free earth abundant elemental red phosphorus: a new class of visible light photocatalyst and photoelectrode materials. Phys Chem Chem Phys 2016; 18:3921-8. [DOI: 10.1039/c5cp06796k] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A proposed photocatalytic mechanism for the photodegradation of RhB over RP under visible photoirradiation.
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Affiliation(s)
- Sajid Ali Ansari
- School of Chemical Engineering
- Yeungnam University
- Gyeongsan-si
- South Korea
| | | | - Moo Hwan Cho
- School of Chemical Engineering
- Yeungnam University
- Gyeongsan-si
- South Korea
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9
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Li X, Wang Z, Zhang Z, Chen L, Cheng J, Ni W, Wang B, Xie E. Light illuminated α-Fe2O3/Pt nanoparticles as water activation agent for photoelectrochemical water splitting. Sci Rep 2015; 5:9130. [PMID: 25773684 PMCID: PMC5390902 DOI: 10.1038/srep09130] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Accepted: 02/19/2015] [Indexed: 12/03/2022] Open
Abstract
The photoelectrochemical (PEC) water splitting is hampered by strong bonds of H2O molecules and low ionic conductivity of pure water. The photocatalysts dispersed in pure water can serve as a water activation agent, which provides an alternative pathway to overcome such limitations. Here we report that the light illuminated α−Fe2O3/Pt nanoparticles may produce a reservoir of reactive intermediates including H2O2, ·OH, OH− and H+ capable of promoting the pure water reduction/oxidation half−reactions at cathode and highly photocatalytic−active TiO2/In2S3/AgInS2 photoanode, respectively. Remarkable photocurrent enhancement has been obtained with α−Fe2O3/Pt as water activation agent. The use of α−Fe2O3/Pt to promote the reactivity of pure water represents a new paradigm for reproducible hydrogen fuel provision by PEC water splitting, allowing efficient splitting of pure water without adding of corrosive chemicals or sacrificial agent.
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Affiliation(s)
- Xiaodong Li
- 1] Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, Sichuan, P.R. China [2] Sichuan Research Center of New Materials, Mianyang 621900, Sichuan, P.R. China
| | - Zhi Wang
- Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, Sichuan, P.R. China
| | - Zemin Zhang
- School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, Gansu, P.R. China
| | - Lulu Chen
- School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, Gansu, P.R. China
| | - Jianli Cheng
- 1] Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, Sichuan, P.R. China [2] Sichuan Research Center of New Materials, Mianyang 621900, Sichuan, P.R. China
| | - Wei Ni
- 1] Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, Sichuan, P.R. China [2] Sichuan Research Center of New Materials, Mianyang 621900, Sichuan, P.R. China
| | - Bin Wang
- 1] Institute of Chemical Materials, China Academy of Engineering Physics, Mianyang 621900, Sichuan, P.R. China [2] Sichuan Research Center of New Materials, Mianyang 621900, Sichuan, P.R. China
| | - Erqing Xie
- School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, Gansu, P.R. China
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Ahn HJ, Kim MJ, Kim K, Kwak MJ, Jang JH. Optimization of quantum dot-sensitized photoelectrode for realization of visible light hydrogen generation. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:2325-2330. [PMID: 24591218 DOI: 10.1002/smll.201303830] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2013] [Revised: 02/11/2014] [Indexed: 06/03/2023]
Affiliation(s)
- Hyo-Jin Ahn
- Interdisciplinary School of Green Energy and Low Dimensional Carbon Materials Center, UNIST, 689-798, Korea
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11
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Fernandes JA, Migowski P, Fabrim Z, Feil AF, Rosa G, Khan S, Machado GJ, Fichtner PFP, Teixeira SR, Santos MJL, Dupont J. TiO2 nanotubes sensitized with CdSe via RF magnetron sputtering for photoelectrochemical applications under visible light irradiation. Phys Chem Chem Phys 2014; 16:9148-53. [DOI: 10.1039/c4cp00361f] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Highly ordered TiO2 NT arrays were easily decorated with CdSe via RF magnetron sputtering.
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Affiliation(s)
- Jesum A. Fernandes
- Universidade Federal do Rio Grande do Sul
- Instituto de Química
- PGCIMAT
- Porto Alegre, Brazil
| | - Pedro Migowski
- Universidade Federal do Rio Grande do Sul
- Instituto de Física
- Porto Alegre, Brazil
| | - Zacarias Fabrim
- Universidade Federal do Rio Grande do Sul
- Instituto de Física
- Porto Alegre, Brazil
| | - Adriano F. Feil
- Pontificia Universidade Católica do Rio Grande do Sul
- Faculdade de Física
- Porto Alegre, Brazil
| | - Guilherme Rosa
- Universidade Federal do Rio Grande do Sul
- Instituto de Física
- Porto Alegre, Brazil
| | - Sherdil Khan
- Universidade Federal do Rio Grande do Sul
- Instituto de Física
- Porto Alegre, Brazil
| | - Guilherme J. Machado
- Universidade Federal do Rio Grande do Sul
- Instituto de Física
- Porto Alegre, Brazil
| | - Paulo F. P. Fichtner
- Universidade Federal do Rio Grande do Sul
- Escola de Engenharia
- Porto Alegre, Brazil
| | - Sérgio R. Teixeira
- Universidade Federal do Rio Grande do Sul
- Instituto de Física
- Porto Alegre, Brazil
| | - Marcos J. L. Santos
- Universidade Federal do Rio Grande do Sul
- Instituto de Química
- PGCIMAT
- Porto Alegre, Brazil
| | - Jairton Dupont
- Universidade Federal do Rio Grande do Sul
- Instituto de Química
- PGCIMAT
- Porto Alegre, Brazil
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Ahn HJ, Kim IH, Yoon JC, Kim SI, Jang JH. p-Doped three-dimensional graphene nano-networks superior to platinum as a counter electrode for dye-sensitized solar cells. Chem Commun (Camb) 2014; 50:2412-5. [DOI: 10.1039/c3cc48920e] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A chemical vapor deposition-grown p-doped three-dimensional graphene nano-network-based DSSC exhibits 6% greater photoconversion efficiency than a Pt-based DSSC.
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Affiliation(s)
- Hyo-Jin Ahn
- Interdisciplinary School of Green Energy and Low Dimensional Carbon Materials Center
- UNIST
- Korea
| | - Ik-Hee Kim
- Interdisciplinary School of Green Energy and Low Dimensional Carbon Materials Center
- UNIST
- Korea
| | - Jong-Chul Yoon
- Interdisciplinary School of Green Energy and Low Dimensional Carbon Materials Center
- UNIST
- Korea
| | - Sun-I Kim
- Interdisciplinary School of Green Energy and Low Dimensional Carbon Materials Center
- UNIST
- Korea
| | - Ji-Hyun Jang
- Interdisciplinary School of Green Energy and Low Dimensional Carbon Materials Center
- UNIST
- Korea
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