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Nguyen-Dang T, Bao AST, Kaiyasuan C, Li K, Chae S, Yi A, Joy S, Harrison K, Kim JY, Pallini F, Beverina L, Graham KR, Nuckolls C, Nguyen TQ. Air-stable Perylene Diimide Trimer Material for n-type Organic Electrochemical Transistors. Adv Mater 2024:e2312254. [PMID: 38521992 DOI: 10.1002/adma.202312254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 03/18/2024] [Indexed: 03/25/2024]
Abstract
We report a new method to make air-stable n-type organic mixed ionic-electronic conductor (OMIEC) films for organic electrochemical transistors (OECTs) using a solution-processable small molecule helical perylene diimide trimer, hPDI[3]-C11. Alkyl side chains were attached to the conjugated core for processability and film making, which were then cleaved via thermal annealing. After the sidechains were removed, the hPDI[3] film becomes less hydrophobic, more ordered, and has a deeper lowest unoccupied molecular orbital (LUMO). These features provide improved ionic transport, greater electronic mobility, and increased stability in air and in aqueous solution. Subsequently, we use hPDI[3]-H as the active material in OECTs and demonstrate a device with a transconductance of 44 mS, volumetric capacitance of ∼250 F/cm3, µC* value of 1 F/cmVs, and excellent stability (> 5 weeks). As proof of their practical applications, we utilize a hPDI[3]-H-based OECTs as a glucose sensor and electrochemical inverter. The approach of side chain removal after film formation charts a path to a wide range of molecular semiconductors to be used as stable, mixed ionic-electronic conductors. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Tung Nguyen-Dang
- Center for Polymers and Organic Solids, University of California at Santa Barbara, Santa Barbara, CA-93117, USA
- Center for Environmental Intelligence, College of Engineering and Computer Science (CECS), VinUniversity, Gialam, Hanoi, Vietnam
| | - Ally Si Tong Bao
- Department of Chemistry, University of Columbia, New York, NY-10027, USA
| | - Chokchai Kaiyasuan
- Center for Polymers and Organic Solids, University of California at Santa Barbara, Santa Barbara, CA-93117, USA
| | - Kunyu Li
- Center for Polymers and Organic Solids, University of California at Santa Barbara, Santa Barbara, CA-93117, USA
| | - Sangmin Chae
- Center for Polymers and Organic Solids, University of California at Santa Barbara, Santa Barbara, CA-93117, USA
| | - Ahra Yi
- Center for Polymers and Organic Solids, University of California at Santa Barbara, Santa Barbara, CA-93117, USA
| | - Syed Joy
- Department of Chemistry, University of Kentucky, Lexington, KY, 40506, USA
| | - Kelsey Harrison
- Department of Chemistry, University of Columbia, New York, NY-10027, USA
| | - Jae Young Kim
- Center for Polymers and Organic Solids, University of California at Santa Barbara, Santa Barbara, CA-93117, USA
| | - Francesca Pallini
- Center for Polymers and Organic Solids, University of California at Santa Barbara, Santa Barbara, CA-93117, USA
- Department of Materials Science, State University of Milano-Bicocca, Via Cozzi 55, Milano, I-20126, Italy
| | - Luca Beverina
- Department of Materials Science, State University of Milano-Bicocca, Via Cozzi 55, Milano, I-20126, Italy
| | - Kenneth R Graham
- Department of Chemistry, University of Kentucky, Lexington, KY, 40506, USA
| | - Colin Nuckolls
- Department of Chemistry, University of Columbia, New York, NY-10027, USA
| | - Thuc-Quyen Nguyen
- Center for Polymers and Organic Solids, University of California at Santa Barbara, Santa Barbara, CA-93117, USA
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2
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Du Z, Luong HM, Sabury S, Jones AL, Zhu Z, Panoy P, Chae S, Yi A, Kim HJ, Xiao S, Brus VV, Manjunatha Reddy GN, Reynolds JR, Nguyen TQ. High-Performance Wearable Organic Photodetectors by Molecular Design and Green Solvent Processing for Pulse Oximetry and Photoplethysmography. Adv Mater 2024; 36:e2310478. [PMID: 38054854 DOI: 10.1002/adma.202310478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 11/27/2023] [Indexed: 12/07/2023]
Abstract
White-light detection from the visible to the near-infrared region is central to many applications such as high-speed cameras, autonomous vehicles, and wearable electronics. While organic photodetectors (OPDs) are being developed for such applications, several challenges must be overcome to produce scalable high-detectivity OPDs. This includes issues associated with low responsivity, narrow absorption range, and environmentally friendly device fabrication. Here, an OPD system processed from 2-methyltetrahydrofuran (2-MeTHF) sets a record in light detectivity, which is also comparable with commercially available silicon-based photodiodes is reported. The newly designed OPD is employed in wearable devices to monitor heart rate and blood oxygen saturation using a flexible OPD-based finger pulse oximeter. In achieving this, a framework for a detailed understanding of the structure-processing-property relationship in these OPDs is also developed. The bulk heterojunction (BHJ) thin films processed from 2-MeTHF are characterized at different length scales with advanced techniques. The BHJ morphology exhibits optimal intermixing and phase separation of donor and acceptor moieties, which facilitates the charge generation and collection process. Benefitting from high charge carrier mobilities and a low shunt leakage current, the newly developed OPD exhibits a specific detectivity of above 1012 Jones over 400-900 nm, which is higher than those of reference devices processed from chlorobenzene and ortho-xylene.
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Affiliation(s)
- Zhifang Du
- Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Hoang Mai Luong
- Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Sina Sabury
- School of Chemistry and Biochemistry, School of Materials Science and Engineering, Center for Organic Photonics and Electronics, Georgia Tech Polymer Network, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Austin L Jones
- School of Chemistry and Biochemistry, School of Materials Science and Engineering, Center for Organic Photonics and Electronics, Georgia Tech Polymer Network, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Ziyue Zhu
- Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Patchareepond Panoy
- Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Sangmin Chae
- Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Ahra Yi
- Department of Organic Materials Science and Engineering, School of Chemical Engineering, Pusan National University, Busan, 46241, Republic of Korea
| | - Hyo Jung Kim
- Department of Organic Materials Science and Engineering, School of Chemical Engineering, Pusan National University, Busan, 46241, Republic of Korea
| | - Steven Xiao
- 1-Material Inc, 2290 Chemin St-Francois, Dorval, Quebec, H9P 1K2, Canada
| | - Viktor V Brus
- Department of Physics, School of Sciences and Humanities, Nazarbayev University, Nur-Sultan City, 010000, Republic of Kazakhstan
| | - G N Manjunatha Reddy
- University of Lille, CNRS, Centrale Lille Institut, Univ. Artois, UMR 8181, Unité de Catalyse et Chimie du Solide, Lille, F-59000, France
| | - John R Reynolds
- School of Chemistry and Biochemistry, School of Materials Science and Engineering, Center for Organic Photonics and Electronics, Georgia Tech Polymer Network, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Thuc-Quyen Nguyen
- Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, CA, 93106, USA
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3
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Du Z, Luong HM, Sabury S, Therdkatanyuphong P, Chae S, Welton C, Jones AL, Zhang J, Peng Z, Zhu Z, Nanayakkara S, Coropceanu V, Choi DG, Xiao S, Yi A, Kim HJ, Bredas JL, Ade H, Reddy GNM, Marder SR, Reynolds JR, Nguyen TQ. Additive-free molecular acceptor organic solar cells processed from a biorenewable solvent approaching 15% efficiency. Mater Horiz 2023; 10:5564-5576. [PMID: 37872787 DOI: 10.1039/d3mh01133j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
We report on the use of molecular acceptors (MAs) and donor polymers processed with a biomass-derived solvent (2-methyltetrahydrofuran, 2-MeTHF) to facilitate bulk heterojunction (BHJ) organic photovoltaics (OPVs) with power conversion efficiency (PCE) approaching 15%. Our approach makes use of two newly designed donor polymers with an opened ring unit in their structures along with three molecular acceptors (MAs) where the backbone and sidechain were engineered to enhance the processability of BHJ OPVs using 2-MeTHF, as evaluated by an analysis of donor-acceptor (D-A) miscibility and interaction parameters. To understand the differences in the PCE values that ranged from 9-15% as a function of composition, the surface, bulk, and interfacial BHJ morphologies were characterized at different length scales using atomic force microscopy, grazing-incidence wide-angle X-ray scattering, resonant soft X-ray scattering, X-ray photoelectron spectroscopy, and 2D solid-state nuclear magnetic resonance spectroscopy. Our results indicate that the favorable D-A intermixing that occurs in the best performing BHJ film with an average domain size of ∼25 nm, high domain purity, uniform distribution and enhanced local packing interactions - facilitates charge generation and extraction while limiting the trap-assisted recombination process in the device, leading to high effective mobility and good performance.
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Affiliation(s)
- Zhifang Du
- Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, CA, 93106, USA.
| | - Hoang Mai Luong
- Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, CA, 93106, USA.
| | - Sina Sabury
- School of Chemistry and Biochemistry, School of Materials Science and Engineering, Center for Organic Photonics and Electronics, Georgia Tech Polymer Network, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.
| | | | - Sangmin Chae
- Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, CA, 93106, USA.
| | - Claire Welton
- University of Lille, CNRS, Centrale Lille Institut, Univ. Artois, UMR 8181, Unité de Catalyse et Chimie du Solide, F-59000, Lille, France.
| | - Austin L Jones
- School of Chemistry and Biochemistry, School of Materials Science and Engineering, Center for Organic Photonics and Electronics, Georgia Tech Polymer Network, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.
| | - Junxiang Zhang
- University of Colorado Boulder, Renewable and Sustainable Energy Institute, Boulder, CO 80303, USA.
| | - Zhengxing Peng
- Department of Physics and Organic and Carbon Electronics Laboratories (ORaCEL), North Carolina State University, Raleigh, NC 27695, USA
| | - Ziyue Zhu
- Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, CA, 93106, USA.
| | - Sadisha Nanayakkara
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, AZ, 85721-0088, USA
| | - Veaceslav Coropceanu
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, AZ, 85721-0088, USA
| | - Dylan G Choi
- Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, CA, 93106, USA.
| | - Steven Xiao
- 1-Material Inc, 2290 Chemin St-Francois, Dorval, Quebec, H9P 1K2, Canada
| | - Ahra Yi
- Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, CA, 93106, USA.
- Department of Organic Material Science and Engineering, School of Chemical Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Hyo Jung Kim
- Department of Organic Material Science and Engineering, School of Chemical Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Jean-Luc Bredas
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, AZ, 85721-0088, USA
| | - Harald Ade
- Department of Physics and Organic and Carbon Electronics Laboratories (ORaCEL), North Carolina State University, Raleigh, NC 27695, USA
| | - G N Manjunatha Reddy
- University of Lille, CNRS, Centrale Lille Institut, Univ. Artois, UMR 8181, Unité de Catalyse et Chimie du Solide, F-59000, Lille, France.
| | - Seth R Marder
- University of Colorado Boulder, Renewable and Sustainable Energy Institute, Boulder, CO 80303, USA.
| | - John R Reynolds
- School of Chemistry and Biochemistry, School of Materials Science and Engineering, Center for Organic Photonics and Electronics, Georgia Tech Polymer Network, Georgia Institute of Technology, Atlanta, Georgia 30332, USA.
| | - Thuc-Quyen Nguyen
- Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California at Santa Barbara, Santa Barbara, CA, 93106, USA.
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Huang J, Luong HM, Lee J, Chae S, Yi A, Qu ZZ, Du Z, Choi DG, Kim HJ, Nguyen TQ. Green-Solvent-Processed High-Performance Broadband Organic Photodetectors. ACS Appl Mater Interfaces 2023; 15:37748-37755. [PMID: 37505202 DOI: 10.1021/acsami.3c09391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
Solution-processed organic photodetectors with broadband activity have been demonstrated with an environmentally benign solvent, ortho-xylene (o-xylene), as the processing solvent. The organic photodetectors employ a wide band gap polymer donor PBDB-T and a narrow band gap small-molecule non-fullerene acceptor CO1-4F, both dissolvable in o-xylene at a controlled temperature. The o-xylene-processed devices have shown external quantum efficiency of up to 70%, surpassing the counterpart processed with chlorobenzene. With a well-suppressed dark current, the device can also present a high specific detectivity of over 1012 Jones at -2 V within practical operation frequencies and is applicable for photoplethysmography with its fast response. These results further highlight the potential of green-solvent-processed organic photodetectors as a high-performing alternative to their counterparts processed in toxic chlorinated solvents without compromising the excellent photosensing performance.
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Affiliation(s)
- Jianfei Huang
- Center for Polymers and Organic Solids, University of California, Santa Barbara, University of California, Santa Barbara, California 93106, United States
- Mitsubishi Chemical Center for Advanced Materials, Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
| | - Hoang Mai Luong
- Center for Polymers and Organic Solids, University of California, Santa Barbara, University of California, Santa Barbara, California 93106, United States
- Mitsubishi Chemical Center for Advanced Materials, Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
| | - Jaewon Lee
- Department of Chemical Engineering and Applied Chemistry, Chungnam National University, Daejeon 34134, South Korea
| | - Sangmin Chae
- Center for Polymers and Organic Solids, University of California, Santa Barbara, University of California, Santa Barbara, California 93106, United States
- Mitsubishi Chemical Center for Advanced Materials, Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
| | - Ahra Yi
- Center for Polymers and Organic Solids, University of California, Santa Barbara, University of California, Santa Barbara, California 93106, United States
- Department of Organic Material Science and Engineering, School of Chemical Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Zhong-Ze Qu
- Center for Polymers and Organic Solids, University of California, Santa Barbara, University of California, Santa Barbara, California 93106, United States
- Mitsubishi Chemical Center for Advanced Materials, Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
| | - Zhifang Du
- Center for Polymers and Organic Solids, University of California, Santa Barbara, University of California, Santa Barbara, California 93106, United States
| | - Dylan G Choi
- Center for Polymers and Organic Solids, University of California, Santa Barbara, University of California, Santa Barbara, California 93106, United States
| | - Hyo Jung Kim
- Department of Organic Material Science and Engineering, School of Chemical Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Thuc-Quyen Nguyen
- Center for Polymers and Organic Solids, University of California, Santa Barbara, University of California, Santa Barbara, California 93106, United States
- Mitsubishi Chemical Center for Advanced Materials, Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
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5
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Park J, Min S, Chae S. P207 Postoperative outcomes of replacement technique using the acellular dermal matrix as filler for BCS patients. Breast 2023. [DOI: 10.1016/s0960-9776(23)00325-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023] Open
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6
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Schopp N, Akhtanova G, Panoy P, Arbuz A, Chae S, Yi A, Kim HJ, Promarak V, Nguyen TQ, Brus VV. Unraveling Device Physics of Dilute-Donor Narrow-Bandgap Organic Solar Cells with Highly Transparent Active Layers. Adv Mater 2022; 34:e2203796. [PMID: 35703912 DOI: 10.1002/adma.202203796] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 05/31/2022] [Indexed: 06/15/2023]
Abstract
The charge generation-recombination dynamics in three narrow-bandgap near-IR absorbing nonfullerene (NFA) based organic photovoltaic (OPV) systems with varied donor concentrations of 40%, 30%, and 20% are investigated. The dilution of the polymer donor with visible-range absorption leads to highly transparent active layers with blend average visible transmittance (AVT) values of 64%, 70%, and 77%, respectively. Opaque devices in the optimized highly reproducible device configuration comprising these transparent active layers lead to photoconversion efficiencies (PCEs) of 7.0%, 6.5%, and 4.1%. The investigation of these structures yields quantitative insights into changes in the charge generation, non-geminate charge recombination, and extraction dynamics upon dilution of the donor. Lastly, this study gives an outlook for employing the highly transparent active layers in semitransparent organic photovoltaics (ST-OPVs).
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Affiliation(s)
- Nora Schopp
- Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California Santa Barbara (UCSB), Santa Barbara, CA, 93106, USA
| | - Gulnur Akhtanova
- Department of Physics, School of Sciences and Humanities, Nazarbayev University, Nur-Sultan City, 010000, Republic of Kazakhstan
| | - Patchareepond Panoy
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Rayong, 21210, Thailand
| | - Alexandr Arbuz
- Core Facilities, Office of the Provost, Nazarbayev University, Nur-Sultan City, 010000, Republic of Kazakhstan
| | - Sangmin Chae
- Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California Santa Barbara (UCSB), Santa Barbara, CA, 93106, USA
| | - Ahra Yi
- Department of Organic Material Science and Engineering, School of Chemical Engineering, Pusan National University, Busan, 46241, Republic of Korea
| | - Hyo Jung Kim
- Department of Organic Material Science and Engineering, School of Chemical Engineering, Pusan National University, Busan, 46241, Republic of Korea
| | - Vinich Promarak
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Rayong, 21210, Thailand
| | - Thuc-Quyen Nguyen
- Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California Santa Barbara (UCSB), Santa Barbara, CA, 93106, USA
| | - Viktor V Brus
- Department of Physics, School of Sciences and Humanities, Nazarbayev University, Nur-Sultan City, 010000, Republic of Kazakhstan
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7
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Nguyen-Dang T, Chae S, Chatsirisupachai J, Wakidi H, Promarak V, Visell Y, Nguyen TQ. Dual-Mode Organic Electrochemical Transistors Based on Self-Doped Conjugated Polyelectrolytes for Reconfigurable Electronics. Adv Mater 2022; 34:e2200274. [PMID: 35362210 DOI: 10.1002/adma.202200274] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 03/10/2022] [Indexed: 06/14/2023]
Abstract
Reconfigurable organic logic devices are promising candidates for next generations of efficient computing systems and adaptive electronics. Ideally, such devices would be of simple structure and design, be power efficient, and compatible with high-throughput microfabrication techniques. This work reports an organic reconfigurable logic gate based on novel dual-mode organic electrochemical transistors (OECTs), which employ a self-doped conjugated polyelectrolyte as the active material, which then allows the transistors to operate in both depletion mode and enhancement mode. Furthermore, mode switching is accomplished by simply altering the polarity of the applied gate and drain voltages, which can be done on the fly. In contrast, achieving similar mode-switching functionality with other organic transistors typically requires complex molecular design or multi-device engineering. It in shown that dual-mode functionality is enabled by the concurrent existence of anion doping and cation dedoping of the films. A device physics model that accurately describes the behavior of these transistors is developed. Finally, the utility of these dual-mode transistors for implementing reconfigurable logic by fabricating a logic gate that may be switched between logic gates AND to NOR, and OR to NAND on the fly is demonstrated.
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Affiliation(s)
- Tung Nguyen-Dang
- Center for Polymers and Organic Solids, University of California, Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Sangmin Chae
- Center for Polymers and Organic Solids, University of California, Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Jirat Chatsirisupachai
- Center for Polymers and Organic Solids, University of California, Santa Barbara, Santa Barbara, CA, 93106, USA
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210, Thailand
| | - Hiba Wakidi
- Center for Polymers and Organic Solids, University of California, Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Vinich Promarak
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology, Wangchan, Rayong, 21210, Thailand
| | - Yon Visell
- RE Touch Lab, California NanoSystems Institute, Department of Electrical and Computer Engineering, University of California, Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Thuc-Quyen Nguyen
- Center for Polymers and Organic Solids, University of California, Santa Barbara, Santa Barbara, CA, 93106, USA
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Nguyen-Dang T, Chae S, Harrison K, Llanes LC, Yi A, Kim HJ, Biswas S, Visell Y, Bazan GC, Nguyen TQ. Efficient Fabrication of Organic Electrochemical Transistors via Wet Chemical Processing. ACS Appl Mater Interfaces 2022; 14:12469-12478. [PMID: 35230814 DOI: 10.1021/acsami.1c23626] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
A wet processing method to fabricate high-performance organic electrochemical transistors (OECTs) is reported. Wet chemical processing enables a simple and reliable patterning step, substituting several complex and expensive cleanroom procedures in the fabrication of OECTs. We fabricate depletion-mode OECTs based on poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) and enhancement-mode OECTs based on a conjugated polyelectrolyte PCPDTBT-SO3K on rigid and flexible substrates using this wet processing method. We show that the wet chemical processing step can also serve as a chemical treatment to enhance the electrical properties of the active material in OECTs. To highlight the potential of the fabrication process in applications, a transistor-based chemical sensor is demonstrated, capable of detecting methylene blue, a popular redox reporter in biodetection and immunoassays, with good detectivity. Given the tremendous potential of OECTs in emerging technologies such as biosensing and neuromorphic computing, this simple fabrication process established herein will render the OECT platform more accessible for research and applications.
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Affiliation(s)
- Tung Nguyen-Dang
- Center for Polymer and Organic Solids, University of California, Santa Barbara, California 93106, United States
| | - Sangmin Chae
- Center for Polymer and Organic Solids, University of California, Santa Barbara, California 93106, United States
| | - Kelsey Harrison
- Center for Polymer and Organic Solids, University of California, Santa Barbara, California 93106, United States
| | - Luana C Llanes
- Center for Polymer and Organic Solids, University of California, Santa Barbara, California 93106, United States
| | - Ahra Yi
- Department of Organic Material Science and Engineering, School of Chemical Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Hyo Jung Kim
- Department of Organic Material Science and Engineering, School of Chemical Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Shantonu Biswas
- California Nanosystems Institute, University of California, Santa Barbara, California 93106, United States
| | - Yon Visell
- California Nanosystems Institute, University of California, Santa Barbara, California 93106, United States
| | - Guillermo C Bazan
- Center for Polymer and Organic Solids, University of California, Santa Barbara, California 93106, United States
| | - Thuc-Quyen Nguyen
- Center for Polymer and Organic Solids, University of California, Santa Barbara, California 93106, United States
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9
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Yurash B, Dixon A, Espinoza C, Mikhailovsky A, Chae S, Nakanotani H, Adachi C, Nguyen TQ. Efficiency of Thermally Activated Delayed Fluorescence Sensitized Triplet Upconversion Doubled in Three-Component System. Adv Mater 2022; 34:e2103976. [PMID: 34793602 DOI: 10.1002/adma.202103976] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 11/01/2021] [Indexed: 06/13/2023]
Abstract
As in many fields, the most exciting endeavors in photon upconversion research focus on increasing the efficiency (upconversion quantum yield) and performance (anti-Stokes shift) while diminishing the cost of production. In this vein, studies employing metal-free thermally activated delayed fluorescence (TADF) sensitizers have garnered increased interest. Here, for the first time, the strategy of ternary photon upconversion is utilized with the TADF sensitizer 2,4,5,6-tetrakis(carbazol-9-yl)isophthalonitrile (4CzIPN), resulting in a doubling of the upconversion quantum yield in comparison to the binary system employing p-terphenyl as the emitter. In this ternary blend, the sensitizer 4CzIPN is paired with an intermediate acceptor, 1-methylnaphthalene, in addition to the emitter molecule, p-terphenyl, yielding a normalized upconversion quantum yield of 7.6% while maintaining the 0.83 eV anti-Stokes shift. These results illustrate the potential benefits of utilizing this strategy of energy-funneling, previously used only with heavy-metal based sensitizers, to increase the performance of these photon upconversion systems.
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Affiliation(s)
- Brett Yurash
- Center for Polymers and Organic Solids (CPOS) and Department of Chemistry & Biochemistry, University of California, Santa Barbara, CA, 93106, USA
| | - Alana Dixon
- Center for Polymers and Organic Solids (CPOS) and Department of Chemistry & Biochemistry, University of California, Santa Barbara, CA, 93106, USA
| | - Carolina Espinoza
- Center for Polymers and Organic Solids (CPOS) and Department of Chemistry & Biochemistry, University of California, Santa Barbara, CA, 93106, USA
| | - Alexander Mikhailovsky
- Center for Polymers and Organic Solids (CPOS) and Department of Chemistry & Biochemistry, University of California, Santa Barbara, CA, 93106, USA
| | - Sangmin Chae
- Center for Polymers and Organic Solids (CPOS) and Department of Chemistry & Biochemistry, University of California, Santa Barbara, CA, 93106, USA
| | - Hajime Nakanotani
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Chihaya Adachi
- Center for Organic Photonics and Electronics Research (OPERA), Kyushu University, 744 Motooka, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Thuc-Quyen Nguyen
- Center for Polymers and Organic Solids (CPOS) and Department of Chemistry & Biochemistry, University of California, Santa Barbara, CA, 93106, USA
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R Luginbuhl B, Raval P, Pawlak T, Du Z, Wang T, Kupgan G, Schopp N, Chae S, Yoon S, Yi A, Jung Kim H, Coropceanu V, Brédas JL, Nguyen TQ, Reddy GNM. Resolving Atomic-Scale Interactions in Nonfullerene Acceptor Organic Solar Cells with Solid-State NMR Spectroscopy, Crystallographic Modelling, and Molecular Dynamics Simulations. Adv Mater 2022; 34:e2105943. [PMID: 34818688 DOI: 10.1002/adma.202105943] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 11/17/2021] [Indexed: 06/13/2023]
Abstract
Fused-ring core nonfullerene acceptors (NFAs), designated "Y-series," have enabled high-performance organic solar cells (OSCs) achieving over 18% power conversion efficiency (PCE). Since the introduction of these NFAs, much effort has been expended to understand the reasons for their exceptional performance. While several studies have identified key optoelectronic properties that govern high PCEs, little is known about the molecular level origins of large variations in performance, spanning from 5% to 18% PCE, for example, in the case of PM6:Y6 OSCs. Here, a combined solid-state NMR, crystallography, and molecular modeling approach to elucidate the atomic-scale interactions in Y6 crystals, thin films, and PM6:Y6 bulk heterojunction (BHJ) blends is introduced. It is shown that the Y6 morphologies in BHJ blends are not governed by the morphology in neat films or single crystals. Notably, PM6:Y6 blends processed from different solvents self-assemble into different structures and morphologies, whereby the relative orientations of the sidechains and end groups of the Y6 molecules to their fused-ring cores play a crucial role in determining the resulting morphology and overall performance of the solar cells. The molecular-level understanding of BHJs enabled by this approach will guide the engineering of next-generation NFAs for stable and efficient OSCs.
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Affiliation(s)
- Benjamin R Luginbuhl
- Center for Polymers & Organic Solids, Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Parth Raval
- University of Lille, CNRS, Centrale Lille Institut, Univ. Artois, UMR 8181, Unité de Catalyse et Chimie du Solide, Lille, F-59000, France
| | - Tomasz Pawlak
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, Lodz, 90-363, Poland
| | - Zhifang Du
- Center for Polymers & Organic Solids, Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Tonghui Wang
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, AZ, 85721-0088, USA
| | - Grit Kupgan
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, AZ, 85721-0088, USA
| | - Nora Schopp
- Center for Polymers & Organic Solids, Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Sangmin Chae
- Center for Polymers & Organic Solids, Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Sangcheol Yoon
- Center for Polymers & Organic Solids, Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Ahra Yi
- Department of Organic Material Science and Engineering, School of Chemical Engineering, Pusan National University, Busan, 46241, Republic of Korea
| | - Hyo Jung Kim
- Department of Organic Material Science and Engineering, School of Chemical Engineering, Pusan National University, Busan, 46241, Republic of Korea
| | - Veaceslav Coropceanu
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, AZ, 85721-0088, USA
| | - Jean-Luc Brédas
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, AZ, 85721-0088, USA
| | - Thuc-Quyen Nguyen
- Center for Polymers & Organic Solids, Department of Chemistry and Biochemistry, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
| | - G N Manjunatha Reddy
- University of Lille, CNRS, Centrale Lille Institut, Univ. Artois, UMR 8181, Unité de Catalyse et Chimie du Solide, Lille, F-59000, France
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Yi A, Chae S, Yoon H, Kim HJ. Insights into the Structural and Morphological Properties of Layer-by-Layer Processed Organic Photovoltaics. ACS Appl Mater Interfaces 2021; 13:60288-60298. [PMID: 34889097 DOI: 10.1021/acsami.1c18952] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Recently, with the development of figure-of-merit non-fullerene acceptor materials combined with a ternary strategy and layer-by-layer (LbL) processing, the efficiency of single-junction organic solar cells has exceeded 18%. However, the structural properties of LbL-processed films have not been sufficiently elucidated. Herein, we systematically investigate films fabricated via LbL processing of three different systems, including a ternary system. In particular, we focus on the structural and morphological transitions associated with the diffusion process controlled by thermal annealing and an additive solvent. Different diffusion and crystal formation mechanisms were clearly identified, which were observed to be dependent on the characteristics of the upper layer formed during the LbL process. Based on this insight, the photovoltaic properties associated with various LbL conditions are elucidated, and an ideal path toward a better device is suggested.
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Affiliation(s)
- Ahra Yi
- Department of Organic Material Science and Engineering, School of Chemical Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Sangmin Chae
- Center for Polymers and Organic Solids, Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, California 93106, United States
| | - Haeun Yoon
- Department of Organic Material Science and Engineering, School of Chemical Engineering, Pusan National University, Busan 46241, Republic of Korea
| | - Hyo Jung Kim
- Department of Organic Material Science and Engineering, School of Chemical Engineering, Pusan National University, Busan 46241, Republic of Korea
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Kim E, Cho MR, Byun SH, A Lim J, Chae S, Choi WK, Kim I, Kim J. Sympathetic predominance before tourniquet deflation is associated with a reduction in arterial blood pressure after tourniquet deflation during total knee arthroplasty. Physiol Res 2021; 70:401-412. [PMID: 33982581 DOI: 10.33549/physiolres.934639] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
High dependency of arterial blood pressure (ABP) on enhanced sympathetic activity, which maintains vascular tone, leads to hypotension after hemodynamic insults that blunt the sympathetic activity. Therefore, we hypothesized that sympathovagal balance before tourniquet deflation (TD) determines the extent of a reduction in ABP after TD during total knee arthroplasty (TKA). Fifty-four hypertensive female patients undergoing TKA under spinal anesthesia were analyzed. The sympathovagal balance [low-to-high frequency ratio of heart rate variability (LF/HF)] before TD was defined as (LF/HF during 5 min before TD-preanesthetic LF/HF)/preanesthetic LF/HF (%). An increase in its value represents a shift in sympathovagal balance toward sympathetic predominance. The percent change in the mean ABP (MAP) after TD was defined as (minimum MAP during 10 min after TD-averaged MAP during 5 min before TD)/averaged MAP during 5 min before TD (%). Simple linear regression was performed to assess the correlation between the sympathovagal balance before TD and change in MAP after TD. The correlation was also assessed by multiple linear regression controlling for age, duration of tourniquet inflation, and spinal anesthesia-induced hypotension. Thirty-two minutes (on average) after tourniquet inflation, the MAP was decreased by 12.1 (-3.0 to 47.9) % [mean (range)] upon TD (P<0.001). The sympathovagal balance before TD was negatively proportional to the change in MAP after TD in both simple and multiple linear regression models (R2=0.323 and 0.340, P<0.001). A shift in sympathovagal balance toward sympathetic predominance before TD is associated with a decrease in ABP after TD.
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Affiliation(s)
- E Kim
- Department of Anesthesiology and Pain Medicine, Daegu Catholic University Medical Center, School of Medicine, Daegu Catholic University, Daegu, Republic of Korea.
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Lee H, Chae S, Yi A, Kim HJ. Hydrophobic stretchable polydimethylsiloxane films with wrinkle patterns prepared via a metal‐assisted chemical etching process using a Si master mold. J Appl Polym Sci 2020. [DOI: 10.1002/app.50398] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Hanbin Lee
- School of Chemical Engineering Pusan National University Busan Republic of Korea
| | - Sangmin Chae
- School of Chemical Engineering Pusan National University Busan Republic of Korea
| | - Ahra Yi
- School of Chemical Engineering Pusan National University Busan Republic of Korea
| | - Hyo Jung Kim
- School of Chemical Engineering Pusan National University Busan Republic of Korea
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Kim J, Chae S, Gu D, Hong S, Lee SH, Kim HJ, Suh H. Syntheses and Properties of Conjugated Polymers Containing Thieno[2,3‐b]indole with Different Electron‐deficient Units. B KOREAN CHEM SOC 2019. [DOI: 10.1002/bkcs.11902] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Juae Kim
- Department of Chemistry and Chemistry Institute for Functional MaterialsPusan National University Busan 46241 Republic of Korea
| | - Sangmin Chae
- Department of Organic Material Science and EngineeringPusan National University Busan 46241 Republic of Korea
| | - Dasom Gu
- Department of Chemistry and Chemistry Institute for Functional MaterialsPusan National University Busan 46241 Republic of Korea
| | - Seungyeon Hong
- Department of Organic Material Science and EngineeringPusan National University Busan 46241 Republic of Korea
| | - Sung Hun Lee
- Department of Organic Material Science and EngineeringPusan National University Busan 46241 Republic of Korea
| | - Hyo Jung Kim
- Department of Organic Material Science and EngineeringPusan National University Busan 46241 Republic of Korea
| | - Hongsuk Suh
- Department of Chemistry and Chemistry Institute for Functional MaterialsPusan National University Busan 46241 Republic of Korea
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Woo BH, Son Y, Choi J, Chae S, Kim HJ, Jun YC. Femtosecond laser irradiation of molecular excitonic films for nanophotonic response control and large-area patterning. Opt Express 2019; 27:18044-18054. [PMID: 31252753 DOI: 10.1364/oe.27.018044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Accepted: 05/29/2019] [Indexed: 06/09/2023]
Abstract
Molecular excitonic films such as J-aggregate thin films can show an optically metallic response in the visible region and can be considered as alternative materials for plasmonics. However, there was no direct, top-down method to modify the optical response over a large area. Here, we demonstrate the femtosecond (fs) laser processing of J-aggregate films on the centimeter scale. With proper laser conditions, optically metallic films (Re[ε] < 0) were modified to dielectric ones (Re[ε] > 0) with large changes in optical responses. We performed various optical spectrum measurements to investigate the effect of fs-laser irradiation. Our results demonstrate that the strong modification of the optical response can be induced over a large area by fs-laser processing and this can be useful for novel nanophotonic studies.
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Kim J, Chae S, Yi A, Hong S, Kim HJ, Suh H. Syntheses and optical, electrochemical, and photovoltaic properties of polymers with 6-(2-thienyl)-4H-thieno[2,3-b
]indole with a variety of electron-deficient units. J Appl Polym Sci 2019. [DOI: 10.1002/app.47624] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Juae Kim
- Department of Chemistry and Chemistry Institute for Functional Materials; Pusan National University; Busan, 609-735 Korea
| | - Sangmin Chae
- Department of Organic Material Science and Engineering; Pusan National University; Busan, 609-735 Korea
| | - Ahra Yi
- Department of Organic Material Science and Engineering; Pusan National University; Busan, 609-735 Korea
| | - Seungyeon Hong
- Department of Organic Material Science and Engineering; Pusan National University; Busan, 609-735 Korea
| | - Hyo Jung Kim
- Department of Organic Material Science and Engineering; Pusan National University; Busan, 609-735 Korea
| | - Hongsuk Suh
- Department of Chemistry and Chemistry Institute for Functional Materials; Pusan National University; Busan, 609-735 Korea
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Yi A, Chae S, Hong S, Lee HH, Kim HJ. Manipulating the crystal structure of a conjugated polymer for efficient sequentially processed organic solar cells. Nanoscale 2018; 10:21052-21061. [PMID: 30215661 DOI: 10.1039/c8nr05407j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Recently, the sequential (Sq) process, which forms nanoscale network structures from quasi-solid-state inter-diffusion through swelling and annealing, is considered to be one of the most efficient methods for fabricating organic solar cells and blend films. Here, we examined the effect of the crystallinity and orientation of poly(3-hexylthiophene) (P3HT) molecules on the formation of the nanostructure by carrying out a Sq process using various solvents with different boiling points. We showed that the moderate crystallinity promoted suitable inter-diffusion between the donor (P3HT) and acceptor ([6,6]-pentadeuterophenyl C61 butyric acid methyl ester, PC60BM), and hence was important for achieving high-performance solar cells using Sq processing. Nanostructure formation by inter-diffusion was investigated and visualized by taking a combination of grazing-incidence wide-angle X-ray scattering (GIWAXS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS) measurements. In addition, our Sq-processed solar cell yielded a device efficiency as high as 3.25%, and was also impressive because it was made with an eco-friendly solvent and using a short-duration annealing process, in contrast to the conventional BHJ process. The present findings provided advanced insight into the Sq process, and we anticipate this efficacious sequential process to contribute not only to the development of higher-efficiency organic solar cells but also to the fabrication of functional blend films.
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Affiliation(s)
- Ahra Yi
- Department of Organic Material Science and Engineering, Pusan National University, Busan 46241, South Korea.
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Choi Y, Chung Y, Kim J, Hong M, Chae S, Hwang K, Yoon S. Association between polycystic ovary syndrome and the polymorphisms of aryl hydrocarbon receptor repressor, glutathione-s-transferase T1, and glutathione-S-transferase M1 genes. Fertil Steril 2018. [DOI: 10.1016/j.fertnstert.2018.07.357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Choi MS, Chae S, Kim HJ, Kim JJ. Control of Crystallinity in PbPc:C 60 Blend Film and Application for Inverted Near-Infrared Organic Photodetector. ACS Appl Mater Interfaces 2018; 10:25614-25620. [PMID: 29992818 DOI: 10.1021/acsami.8b08803] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Inverted near-infrared (NIR) organic photodetectors (OPDs) are required to combine the OPDs with an n-channel silicon-based integrated circuit. NIR absorption in the 930-960 nm range is important because the intensity of solar irradiation is low in this wavelength regime. Here, we controlled the crystallinity of lead(II) phthalocyanine (PbPc) in a PbPc:C60 blend film to obtain NIR absorption. To form a triclinic phase responsible for NIR light absorption, a substrate was heated during fabrication and C60 was used as a templating layer, as well as an electron extraction layer, for an inverted structure. NIR absorption near 950 nm was enhanced, and the structural properties of the film changed dramatically. The OPD with enhanced NIR absorption exhibited a responsivity of 244 mA/W and an external quantum efficiency of 31.1% at a reverse bias of -3 V and 970 nm. The OPD detectivity also increased to 9.01 × 1012 and 1.36 × 1011 cm Hz1/2/W under a zero bias and a reverse bias of -3 V, respectively.
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Affiliation(s)
- Min-Soo Choi
- Department of Materials Science and Engineering, Research Institute of Advanced Materials , Seoul National University , Seoul 08826 , South Korea
| | - Sangmin Chae
- Department of Organic Material Science and Engineering , Pusan National University , Busan 46241 , South Korea
| | - Hyo Jung Kim
- Department of Organic Material Science and Engineering , Pusan National University , Busan 46241 , South Korea
| | - Jang-Joo Kim
- Department of Materials Science and Engineering, Research Institute of Advanced Materials , Seoul National University , Seoul 08826 , South Korea
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Han H, Kim D, Chae S, Park J, Nam SY, Choi M, Yong K, Kim HJ, Son J, Jang HM. Switchable ferroelectric photovoltaic effects in epitaxial h-RFeO 3 thin films. Nanoscale 2018; 10:13261-13269. [PMID: 29971282 DOI: 10.1039/c7nr08666k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Ferroelectric photovoltaics (FPVs) have drawn much attention owing to their high stability, environmental safety, and anomalously high photovoltages, coupled with reversibly switchable photovoltaic responses. However, FPVs suffer from extremely low photocurrents, which is primarily due to their wide band gaps. Here, we present a new class of FPVs by demonstrating switchable ferroelectric photovoltaic effects and narrow band-gap properties using hexagonal ferrite (h-RFeO3) thin films, where R denotes rare-earth ions. FPVs with narrow band gaps suggest their potential applicability as photovoltaic and optoelectronic devices. The h-RFeO3 films further exhibit reasonably large ferroelectric polarizations (4.7-8.5 μC cm-2), which possibly reduces a rapid recombination rate of the photo-generated electron-hole pairs. The power conversion efficiency (PCE) of h-RFeO3 thin-film devices is sensitive to the magnitude of polarization. In the case of the h-TmFeO3 (h-TFO) thin film, the measured PCE is twice as large as that of the BiFeO3 thin film, a prototypic FPV. The effect of electrical fatigue on FPV responses has been further investigated. This work thus demonstrates a new class of FPVs towards high-efficiency solar cell and optoelectronic applications.
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Affiliation(s)
- Hyeon Han
- Department of Materials Science and Engineering, and Division of Advanced Materials Science, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea.
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Chae S, Kang KM, Kim HJ, Kang E, Park SY, Kim JH, Kim SH, Kim SW, Kim EK. Neutrophil-lymphocyte ratio predicts response to chemotherapy in triple-negative breast cancer. ACTA ACUST UNITED AC 2018; 25:e113-e119. [PMID: 29719435 DOI: 10.3747/co.25.3888] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Background The neutrophil-lymphocyte ratio (nlr) has been reported to correlate with patient outcome in several cancers, including breast cancer. We evaluated whether the nlr can be a predictive factor for pathologic complete response (pcr) after neoadjuvant chemotherapy (nac) in patients with triple-negative breast cancer (tnbc). Methods We analyzed the correlation between response to nac and various factors, including the nlr, in 87 patients with tnbc who underwent nac. In addition, we analyzed the association between the nlr and recurrence-free survival (rfs) in patients with tnbc. Results Of the 87 patients, 25 (28.7%) achieved a pcr. A high Ki-67 index and a low nlr were significantly associated with pcr. The pcr rate was higher in patients having a high Ki-67 index (≥15%) than in those having a low Ki-67 index (35.7% vs. 0%, p = 0.002) and higher in patients having a low nlr (≤1.7) than in those having a high nlr (42.1% vs. 18.4%, p = 0.018). In multiple logistic analysis, a low nlr remained the only predictive factor for pcr (odds ratio: 4.274; p = 0.008). In the survival analysis, the rfs was significantly higher in the low nlr group than in the high nlr group (5-year rfs rate: 83.7% vs. 66.9%; log-rank p = 0.016). Conclusions Our findings that the nlr is a predictor of pcr to nac and also a prognosticator of recurrence suggest an association between response to chemotherapy and inflammation in patients with tnbc. The pretreatment nlr can be a useful predictive and prognostic marker in patients with tnbc scheduled for nac.
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Affiliation(s)
| | | | | | | | | | - J H Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam; and
| | - S H Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam; and
| | - S W Kim
- Department of Surgery, Daerim St. Mary's Hospital, Seoul, Republic of Korea
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Kim J, Chae S, Yi A, Kim M, Kim HJ, Suh H. Syntheses and Properties of Semiconducting Polymers Based on Pyrimidine Series Substituted with Thiazolo-Pyridine. Macromol Res 2018. [DOI: 10.1007/s13233-018-6063-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Chae S, Yi A, Park C, Chang WS, Lee HH, Choi J, Kim HJ. Using Femtosecond Laser Irradiation to Enhance the Vertical Electrical Properties and Tailor the Morphology of a Conducting Polymer Blend Film. ACS Appl Mater Interfaces 2017; 9:24422-24427. [PMID: 28691483 DOI: 10.1021/acsami.7b05937] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We report femtosecond infrared laser-induced selective tailoring of carrier transport as well as surface morphology on a conducting polymer blend thin film. Maximal 2.4 times enhancement on vertical current transport in poly(3-hexylthiophene):phenyl-C61-butyric acid methyl ester, was achieved by this irradiation. The laser irradiation induced a photo expansion without deteriorating its molecular structure and the film morphology could be customized in the micron scale by adjusting the laser writing parameters. In the photoexpanded region, the face-on populations were about 2.2 times larger in comparison with the pristine region, which was a major contributor to the enhanced carrier transport.
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Affiliation(s)
- Sangmin Chae
- Department of Organic Material Science and Engineering, Pusan National University , Busan 46241, South Korea
- Korea Institute of Machinery and Materials (KIMM) , 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 34103, South Korea
| | - Ahra Yi
- Department of Organic Material Science and Engineering, Pusan National University , Busan 46241, South Korea
| | - Cheolmin Park
- Korea Institute of Machinery and Materials (KIMM) , 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 34103, South Korea
| | - Won Seok Chang
- Korea Institute of Machinery and Materials (KIMM) , 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 34103, South Korea
| | - Hyun Hwi Lee
- Pohang Accelerator Laboratory, POSTECH , Pohang 37673, South Korea
| | - Jiyeon Choi
- Korea Institute of Machinery and Materials (KIMM) , 156 Gajeongbuk-ro, Yuseong-gu, Daejeon 34103, South Korea
| | - Hyo Jung Kim
- Department of Organic Material Science and Engineering, Pusan National University , Busan 46241, South Korea
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Kim K, Cho Y, Shin K, Lee Y, Yokota M, Chae S, Park K, Uchida Y. 414 Both sphingosine kinase 1 and 2 coordinately regulate cathelicidin antimicrobial peptide production during keratinocyte differentiation. J Invest Dermatol 2017. [DOI: 10.1016/j.jid.2017.02.433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Jung J, Kang E, Gwak JM, Seo AN, Park SY, Lee AS, Baek H, Chae S, Kim EK, Kim SW. Association between basal-like phenotype and BRCA1/2 germline mutations in Korean breast cancer patients. ACTA ACUST UNITED AC 2016; 23:298-303. [PMID: 27803593 DOI: 10.3747/co.23.3054] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
INTRODUCTION BRCA mutation testing allows index patients and their families to be provided with appropriate cancer risk-reduction strategies. Because of the low prevalence of BRCA mutations in unselected breast cancer patients and the high cost of genetic testing, it is important to identify the subset of women who are likely to carry BRCA mutations. In the present study, we examined the association between BRCA1/2 germline mutations and the immunohistochemical features of breast cancer. METHODS In a retrospective review of 498 breast cancer patients who had undergone BRCA testing at Seoul National University Bundang Hospital between July 2003 and September 2012, we gathered immunohistochemical information on estrogen receptor (er), progesterone receptor (pr), her2 (human epidermal growth factor receptor 2), cytokeratin 5/6, egfr (epidermal growth factor receptor), and p53 status. RESULTS Among the 411 patients eligible for the study, 50 (12.2%) had germline mutations in BRCA1 or BRCA2. Of the 93 patients with triple-negative breast cancer (tnbc), 25 with BRCA1/2 mutations were identified (BRCA1, 20.4%; BRCA2, 6.5%). On univariate analysis, er, pr, cytokeratin 5/6, egfr, and tnbc were found to be related to BRCA1 mutations, but on multivariate analysis, only tnbc was significantly associated with BRCA1 mutations. Among patients with early-onset breast cancer or with a family history of breast or ovarian cancer, BRCA1 mutations were significantly more prevalent in the tnbc group than in the non-tnbc group. CONCLUSIONS In the present study, tnbc was the only independent predictor of BRCA1 mutation in patients at high risk of hereditary breast and ovarian cancers. Other histologic features of basal-like breast cancer did not improve the estimate of BRCA1 mutation risk.
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Affiliation(s)
- J Jung
- Department of Surgery, Eulji University Hospital, Daejeon
| | - E Kang
- Department of Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam
| | - J M Gwak
- Department of Pathology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam
| | - A N Seo
- Department of Pathology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam
| | - S Y Park
- Department of Pathology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam
| | - A S Lee
- Department of Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam
| | - H Baek
- Department of Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam
| | - S Chae
- Department of Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam
| | - E K Kim
- Department of Surgery, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam
| | - S W Kim
- Department of Surgery, Daerim St. Mary's Hospital, Seoul, Republic of Korea
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Kim J, Kim NH, Song S, Park SY, Chae S, Bae E, Kim I, Kim HJ, Kim JY, Suh H. Syntheses of PCDTBT containing tetrafluorobenzene as electron-withdrawing group with deep HOMO energy level and applications for photovoltaics. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.09.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Kim J, Park SY, Han G, Chae S, Song S, Shim JY, Bae E, Kim I, Kim HJ, Kim JY, Suh H. Conjugated polymers containing 6-(2-thienyl)-4H-thieno[3,2-b]indole (TTI) and isoindigo for organic photovoltaics. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.04.061] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Kim J, Lee J, Chae S, Shim JY, Lee DY, Kim I, Kim HJ, Park SH, Suh H. Conjugated polymers containing pyrimidine with electron withdrawing substituents for organic photovoltaics with high open-circuit voltage. POLYMER 2016. [DOI: 10.1016/j.polymer.2015.12.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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31
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Chae S, Jo KH, Lee SW, Keum HS, Kim HJ, Choi J, Lee HH. Selective Chain Alignment of Conducting Polymer Blend Films by an Ultrafast Laser. MACROMOL CHEM PHYS 2015. [DOI: 10.1002/macp.201500354] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Sangmin Chae
- Department of Organic Material Science and Engineering; Pusan National University; Busan 609-755 South Korea
| | - Kuk Hyun Jo
- Department of Organic Material Science and Engineering; Pusan National University; Busan 609-755 South Korea
| | - Si Woo Lee
- Department of Organic Material Science and Engineering; Pusan National University; Busan 609-755 South Korea
| | - Hee-Sung Keum
- Department of Organic Material Science and Engineering; Pusan National University; Busan 609-755 South Korea
| | - Hyo Jung Kim
- Department of Organic Material Science and Engineering; Pusan National University; Busan 609-755 South Korea
| | - Jiyeon Choi
- Korea Institute of Machinery and Materials; Daejeon 305-343 South Korea
| | - Hyun Hwi Lee
- Pohang Accelerator Laboratory; POSTECH; Pohang 790-784 South Korea
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32
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Lee A, Kang E, Baek H, Chae S, Kim EK, Kim S. 54O Evaluation of BRCA1/2 mutation prevalence in Korean women with triple-negative breast cancer. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv519.03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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33
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Baek H, Kim EK, Lee A, Chae S, Kang E, Kim SW. 91P A survey of margin status evaluation in the Korean Breast Cancer Society member. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv519.40] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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34
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Park Y, Kim B, Lee JW, Nam OH, Sone C, Park H, Eunsoon O, Shin H, Chae S, Cho J, Kim IH, Khim J, Cho S, Kim T. Characteristic of InGaN/GaN Laser Diode Grown by a Multi-Wafer MOCVD System. ACTA ACUST UNITED AC 2014. [DOI: 10.1557/s1092578300000570] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
InGaN/GaN multi-quantum well (MQW) laser diodes (LDs) were grown on c-plane sapphire substrates using a multi-wafer MOCVD system. The threshold current for pulsed lasing was 1.6 A for a gain-guided laser diode with a stripe of 10 × 800 μm2. The threshold current density was 20.3 kA cm−2 and the threshold voltage was 16.5 V. The optical power ratio of transverse electric mode to transverse magnetic mode was found to be greater than 50. The characteristic temperature measured from the plot of threshold current versus measurement temperature was between 130 and 150K.
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Chae S, Ahn BY, Byun K, Cho YM, Yu MH, Lee B, Hwang D, Park KS. A Systems Approach for Decoding Mitochondrial Retrograde Signaling Pathways. Sci Signal 2013; 6:rs4. [DOI: 10.1126/scisignal.2003266] [Citation(s) in RCA: 140] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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36
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Ha Y, Lee EM, Lee YH, Kim CH, Kim D, Chae S, Ahn KK, Kim B, Chae C. Effects of a modified live CSFV vaccine on the development of PMWS in pigs infected experimentally with PCV-2. Vet Rec 2009; 164:48-51. [PMID: 19136684 DOI: 10.1136/vr.164.2.48] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
The objective of this study was to determine the effect of vaccination against classical swine fever virus (CSFV) on the development of postweaning multisystemic wasting syndrome (PMWS) in conventional pigs infected experimentally with porcine circovirus type 2 (PCV-2). The pigs infected with PCV-2 and immunised with modified live CSFV developed mild to moderate PMWS, whereas none of the pigs infected with PCV-2 alone or immunised with modified live CSFV alone developed PMWS. Lesions histologically characteristic of PMWS were observed in lymph nodes from the pigs infected with PCV-2 and immunised with modified live CSFV vaccine, and extensive replication of PCV-2 was detected in the nodes by in situ hybridisation.
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Affiliation(s)
- Y Ha
- Department of Veterinary Pathology, Seoul National University, College of Veterinary Medicine, Seoul, Republic of Korea
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Ha Y, Ha SK, Lee YH, Kim D, Chae S, Kim CH, Ahn KK, Kim O, Chae C. Prevalence of tir gene subtypes in Escherichia coli isolates from pigs. Vet Rec 2008; 163:424-5. [PMID: 18836158 DOI: 10.1136/vr.163.14.424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Y Ha
- Department of Veterinary Pathology, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
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Kim S, Park SY, Yong H, Famulski JK, Chae S, Lee JH, Kang CM, Saya H, Chan GK, Cho H. HBV X protein targets hBubR1, which induces dysregulation of the mitotic checkpoint. Oncogene 2008; 27:3457-64. [DOI: 10.1038/sj.onc.1210998] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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39
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Kim S, Yoon J, Chae S, Choi Y, Kim S, Moon S. An efficient and reliable DNA extraction method for preimplantation genetic diagnosis: a comparison of allele drop-out and amplification rate using different single cell lysis methods. Fertil Steril 2007. [DOI: 10.1016/j.fertnstert.2007.07.807] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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40
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Ahn H, Chae S, Kim S, Wang C, Summers RS. Efficient taste and odour removal by water treatment plants around the Han River water supply system. Water Sci Technol 2007; 55:103-9. [PMID: 17489399 DOI: 10.2166/wst.2007.168] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Seven major water treatment plants in Seoul Metropolitan Area, which are under Korea Water Resources Corporation (KOWACO)'s management, take water from the Paldang Reservoir in the Han River System for drinking water supply. There are taste and odour (T&O) problems in the finished water because the conventional treatment processes do not efficiently remove the T&O compounds. This study evaluated T&O removal by ozonation, granular activated carbon (GAC) treatment, powder activated carbon (PAC) and an advanced oxidation process in a pilot-scale treatment plant and bench-scale laboratory experiments. During T&O episodes, PAC alone was not adequate, but as a pretreatment together with GAC it could be a useful option. The optimal range of ozone dose was 1 to 2 mg/L at a contact time of 10 min. However, with ozone alone it was difficult to meet the T&O target of 3 TON and 15 ng/L of MIB or geosmin. The GAC adsorption capacity for DOC in the three GAC systems (F/A, GAC and O3 + GAC) at an EBCT of 14 min is mostly exhausted after 9 months. However, substantial TON removal continued for more than 2 years (>90,000 bed volumes). GAC was found to be effective for T&O control and the main removal mechanisms were adsorption capacity and biodegradation.
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Affiliation(s)
- H Ahn
- Korea Water Resources Corporation, 462-1 Jeonmin-dong Yusung-ku Daejeon, South Korea
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41
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Abstract
Novelty stimuli cause various behavioral responses, such as exploration and avoidance, and contextual variables may contribute to the behavioral outputs. Here, we tried to compare the behavioral responses to novel objects of five inbred strains of mice (C57BL/6J, 129/svJae, C3H/HeJ, BALB/cJ and DBA/2J) by using a modified novel object test where a small light-weight cube wrapped with paper was presented to mice in a home cage without beddings. In response to these objects, the C57BL/6J, 129/svJae and C3H/HeJ mice showed mild exploratory behaviors, such as approaching, sniffing or brief contact. In striking contrast, the BALB/cJ and DBA/2J mice, which have been known to show high avoidance/low exploration in other behavioral paradigms, exhibited play-like secondary reactions toward the objects after initial primary exploratory behaviors. Specifically, DBA/2J mice would move the object around in the cage, holding it with their mouths, and BALB/cJ mice would gnaw the object, eventually stripping off the wrapping paper. Such behaviors decreased when similar objects were presented repeatedly. The present results suggest that active manipulations of novel objects may be a relevant parameter for measuring novelty-induced behaviors in mice and appear to be strongly influenced by genetic factors.
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Affiliation(s)
- D Kim
- Center for Calcium & Learning, Division of Life Sciences, Korea Institute of Science & Technology, Cheongryang, Seoul, Republic of Korea
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Chae H, Lee J, Byun J, Jung W, Kwak Y, Chae S, Kim H. Blockade of p38 mitogen-activated protein kinase pathway inhibits interleukin-6 release and expression in primary neonatal cardiomyocytes. Res Commun Mol Pathol Pharmacol 2003; 110:209-28. [PMID: 12760489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
Abstract
The induction of interleukin-6 (IL-6) using combined proinflammatory agents (LPS/IFN-gamma or TNF-alpha/IFN-gamma) was studied in relation to p38 mitogen-activated protein kinase (MAPK) and NF-kappaB transcriptional factor in primary neonatal cardiomyocytes. When added to cultures of cardiomyocytes, the combined agents (LPS/IFN-gamma or TNF-alpha/IFN-gamma) had stimulatory effect on the production of IL-6 and the elevation was significantly reduced by SB203580, a specific p38 MAPK inhibitor. SB203580 inhibited protein production and gene expression of IL-6 in a concentration-dependent manner. In this study, IFN-gamma enhancement of TNF-alpha-induced NF-kappaB binding affinity as well as p38 MAP kinase activation was observed. However, a specific inhibitor of p38 MAPK, SB203580, had no effect on TNF-alpha/IFN-gamma or LPS/IFN-gamma-induced NF-kappaB activation. This study strongly suggests that these pathways about TNF-alpha/IFN-gamma or LPS/IFN-gamma-activated IL-6 release can be primarily dissociated in primary neonatal cardiomyocytes.
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Affiliation(s)
- H Chae
- Department of Dental Pharmacology, Wonkwang Dental Research Institute, School of Dentistry, Wonkwang University, Iksan Chonbuk, 570-749, South Korea
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Chae S, Yang D, Park H, Cho Y, Jun J, Park W. IP-0052 Serun neopterin predicts severity of coronary artery stenosis and prognosis in acute coronary syndrome. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)90127-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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44
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Chae S, Lee J, Yang D, Park H, Cho Y, Jun J. 3P-0844 The short-term prognostic value of mean platelet volume in acute myocardial infarction. ATHEROSCLEROSIS SUPP 2003. [DOI: 10.1016/s1567-5688(03)91062-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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45
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Chae H, Chae S, Park N, Bang B, Cho S, Kim J, Kim H, Kim H, Lee Z, Kim H. Pyrrolidine dithiocarbamate inhibits serum-induced NF-κB activation and induces apoptosis in ROS 17/2.8 osteoblasts. Int Immunopharmacol 2001; 1:255-63. [PMID: 11360927 DOI: 10.1016/s1567-5769(00)00025-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Nuclear factor-kappaB (NF-kappaB) activity affects cell survival in ROS 17/2.8 osteoblasts. Preventing NF-kappaB transcription activity with a potent NF-kappaB inhibitor, pyrrolidine dithiocarbamate (PDTC), results in apoptosis. Thus, we explored the effect of pyrrolidine dithiocarbamate (PDTC), which potently blocks the activation of nuclear factor-kappaB (NF-kappaB) in serum-exposed condition, on the activation of mitogen activated protein kinase (MAPK), especially, JNK/SAPK and p38 MAPK induction. PDTC transiently increased the phosphotransferase activity of c-Jun N-terminal Kinase1 (JNK1), which might in turn activates transcriptional activity of activating protein-1 (AP-1). The activation of JNK was completely decreased in dominant negative JNK1 transfected cells and the PDTC-induced cell death was attenuated in these cells. In addition, AP-1 activation was decreased in the JNK1 transfected cells, compared with vector-transfected cells. The NF-kappaB inhibitor also transiently activates p38 MAPK but SB203580, a specific p38 MAPK inhibitor, does not have any regulatory effect on PDTC-induced cell death, suggesting that the cell death is mediated by JNK not by p38 MAPK. Thus, overall, these results show that PDTC induces apoptosis and suggest that JNK/SAPK and subsequent AP-1 activation may be involved in the apoptotic pathway in ROS 17/2.8 osteoblasts.
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Affiliation(s)
- H Chae
- Department of Dental Pharmacology, School of Dentistry, Wonkwang University, Iksan, Chonbuk, South Korea
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Shin M, Chae S, Kim C, Jung T, Park J. Changing trends of clinical aspects in lung cancer from 1988 to 1999. Lung Cancer 2000. [DOI: 10.1016/s0169-5002(00)80801-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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47
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Chae P, Shin M, Cha S, Chae S, Kim C, Jung T, Park J. Can we perform the same staging workup in lung cancer regardless of histologic type? Lung Cancer 2000. [DOI: 10.1016/s0169-5002(00)80909-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Hirose S, Inazu Y, Chae S, Maeda Y. Suppression of the growth/differentiation transition in Dictyostelium development by transient expression of a novel gene, dia1. Development 2000; 127:3263-70. [PMID: 10887082 DOI: 10.1242/dev.127.15.3263] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
In Dictyostelium discoideum Ax-2 cells, a specific checkpoint (PS point) from which cells enter the differentiation phase in response to starvation has been specified in the cell cycle. Using the differential display method, we isolated a novel gene, dia1 (differentiation-associated gene 1), that is specifically expressed in cells differentiating from the PS point. The dia1 mRNA has an open reading frame of 1,368 bp and is deduced to code for a 48.6 kDa protein (DIA1). The DIA1 protein is highly serine-rich and the serine residues are predominantly located in the C-terminal region. After the PSORT II search, the protein is predicted to be GPI-anchored at the plasma membrane. Unexpectedly, dia1 overexpression rather impaired the progression of differentiation, possibly coupled with the reduced expression of early genes such as cAMP receptor1 (car1). The inhibitory effect of dia1 expression on early differentiation was almost completely nullified by externally applied cAMP pulses. In contrast to dia1 overexpression, antisense RNA-mediated dia1 inactivation was found to enhance the initial step of cell differentiation, as exemplified by precocious expression of car1 and other early genes. We discuss the unique structure and function of DIA1 in relation to the cooperative development of cells during the establishment of multicellular organization.
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Affiliation(s)
- S Hirose
- Biological Institute, Graduate School of Science, Tohoku University, Aoba, Sendai 980-8578, Japan.
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Badve S, Lôgdberg L, Sokhi R, Sigal SH, Botros N, Chae S, Das KM, Gupta S. An antigen reacting with das-1 monoclonal antibody is ontogenically regulated in diverse organs including liver and indicates sharing of developmental mechanisms among cell lineages. Pathobiology 2000; 68:76-86. [PMID: 10878504 DOI: 10.1159/000028117] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The monoclonal antibody designated mAb Das-1, which was generated against a colon epithelial protein, reacts with the normal biliary epithelium and keratinocytes, which are among targets of tissue injury in ulcerative colitis. Moreover, mAb Das-1 reacts with abnormal cells in Barrett's esophagus and chronic cystitis profunda, as well as so-called 'oval cells' in the adult liver, which are considered oncogenic progenitor cells. To establish ontogenic regulation of mAb Das-1 reactivity, we studied 7- to 24-week-old human fetuses by immunohistochemistry. In liver, mAb Das-1 reactivity was further correlated with glycogen, dipeptidyl peptidase IV, glucose-6-phosphatase and gamma-glutamyl transpeptidase expression. mAb Das-1 reacted with cells in organs arising from the pharyngeal cleft (thymus), primitive gut (oral cavity, pharynx, lung, esophagus, stomach, biliary tree, pancreas, liver, colon), ureteric bud (renal tubules, collecting duct), mesonephros (kidney, testis), mesoderm (muscle) and elsewhere (skin, adrenal cortex). In distinction from the adult liver, mAb Das-1 staining was more pronounced in hepatoblasts compared with biliary cells. In adult tissues, however, mAb Das-1 reactivity was restricted to the colon, biliary epithelium, keratinocytes, and ciliary body. These data indicated that the mAb Das-1 recognized epitopes in fetal cells of diverse ectodermal, mesodermal and endodermal origin, compatible with sharing of lineage mechanisms in tissues. Reactivation of mAb Das-1 staining in epithelial precancerous conditions, including carcinomas arising in these organs, is compatible with oncofetal regulation of the antigen, which will facilitate analysis of cell subpopulations during organ development, regeneration and oncogenesis.
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Affiliation(s)
- S Badve
- Department of Pathology, Albert Einstein College of Medicine, Bronx, NY 10461, USA
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