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Han S, Kim JS, Park E, Meng Y, Xu Z, Foucher AC, Jung GY, Roh I, Lee S, Kim SO, Moon JY, Kim SI, Bae S, Zhang X, Park BI, Seo S, Li Y, Shin H, Reidy K, Hoang AT, Sundaram S, Vuong P, Kim C, Zhao J, Hwang J, Wang C, Choi H, Kim DH, Kwon J, Park JH, Ougazzaden A, Lee JH, Ahn JH, Kim J, Mishra R, Kim HS, Ross FM, Bae SH. High energy density in artificial heterostructures through relaxation time modulation. Science 2024; 384:312-317. [PMID: 38669572 DOI: 10.1126/science.adl2835] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 03/06/2024] [Indexed: 04/28/2024]
Abstract
Electrostatic capacitors are foundational components of advanced electronics and high-power electrical systems owing to their ultrafast charging-discharging capability. Ferroelectric materials offer high maximum polarization, but high remnant polarization has hindered their effective deployment in energy storage applications. Previous methodologies have encountered problems because of the deteriorated crystallinity of the ferroelectric materials. We introduce an approach to control the relaxation time using two-dimensional (2D) materials while minimizing energy loss by using 2D/3D/2D heterostructures and preserving the crystallinity of ferroelectric 3D materials. Using this approach, we were able to achieve an energy density of 191.7 joules per cubic centimeter with an efficiency greater than 90%. This precise control over relaxation time holds promise for a wide array of applications and has the potential to accelerate the development of highly efficient energy storage systems.
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Affiliation(s)
- Sangmoon Han
- Department of Mechanical Engineering and Materials Science, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Justin S Kim
- Department of Mechanical Engineering and Materials Science, Washington University in St. Louis, St. Louis, MO 63130, USA
- The Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Eugene Park
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Yuan Meng
- Department of Mechanical Engineering and Materials Science, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Zhihao Xu
- Department of Mechanical Engineering and Materials Science, Washington University in St. Louis, St. Louis, MO 63130, USA
- The Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Alexandre C Foucher
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Gwan Yeong Jung
- Department of Mechanical Engineering and Materials Science, Washington University in St. Louis, St. Louis, MO 63130, USA
- The Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Ilpyo Roh
- Department of Mechanical Engineering and Materials Science, Washington University in St. Louis, St. Louis, MO 63130, USA
- M.O.P. Materials, Seoul 07285, Republic of Korea
| | - Sangho Lee
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Sun Ok Kim
- Department of Mechanical Engineering and Materials Science, Washington University in St. Louis, St. Louis, MO 63130, USA
- Precision Biology Research Center, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Ji-Yun Moon
- Department of Mechanical Engineering and Materials Science, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Seung-Il Kim
- Department of Mechanical Engineering and Materials Science, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Sanggeun Bae
- Department of Mechanical Engineering and Materials Science, Washington University in St. Louis, St. Louis, MO 63130, USA
- The Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Xinyuan Zhang
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Bo-In Park
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Seunghwan Seo
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Yimeng Li
- Department of Mechanical Engineering and Materials Science, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Heechang Shin
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Kate Reidy
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Anh Tuan Hoang
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Suresh Sundaram
- CNRS, Georgia Tech - CNRS IRL 2958, GT-Europe, 57070 Metz, France
| | - Phuong Vuong
- CNRS, Georgia Tech - CNRS IRL 2958, GT-Europe, 57070 Metz, France
| | - Chansoo Kim
- The Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA
- Department of Electrical and System Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Junyi Zhao
- The Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA
- Department of Electrical and System Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Jinyeon Hwang
- Energy Storage Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Chuan Wang
- The Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA
- Department of Electrical and System Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Hyungil Choi
- M.O.P. Materials, Seoul 07285, Republic of Korea
| | - Dong-Hwan Kim
- Precision Biology Research Center, Sungkyunkwan University, Suwon 16419, Republic of Korea
- School of Chemical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Jimin Kwon
- Department of Electrical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Jin-Hong Park
- Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Abdallah Ougazzaden
- CNRS, Georgia Tech - CNRS IRL 2958, GT-Europe, 57070 Metz, France
- School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA
| | - Jae-Hyun Lee
- Department of Materials Science and Engineering and Department of Energy Systems Research, Ajou University, Suwon 16499, Republic of Korea
| | - Jong-Hyun Ahn
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Jeehwan Kim
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Rohan Mishra
- Department of Mechanical Engineering and Materials Science, Washington University in St. Louis, St. Louis, MO 63130, USA
- The Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Hyung-Seok Kim
- Energy Storage Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
- KHU-KIST Department of Converging Science and Technology, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Frances M Ross
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Sang-Hoon Bae
- Department of Mechanical Engineering and Materials Science, Washington University in St. Louis, St. Louis, MO 63130, USA
- The Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, MO 63130, USA
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2
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Zhao B, Ren G, Mei H, Wu VC, Singh S, Jung GY, Chen H, Giovine R, Niu S, Thind AS, Salman J, Settineri NS, Chakoumakos BC, Manley ME, Hermann RP, Lupini AR, Chi M, Hachtel JA, Simonov A, Teat SJ, Clément RJ, Kats MA, Ravichandran J, Mishra R. Giant Modulation of Refractive Index from Picoscale Atomic Displacements. Adv Mater 2024:e2311559. [PMID: 38520395 DOI: 10.1002/adma.202311559] [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: 11/01/2023] [Revised: 02/28/2024] [Indexed: 03/25/2024]
Abstract
It is shown that structural disorder-in the form of anisotropic, picoscale atomic displacements-modulates the refractive index tensor and results in the giant optical anisotropy observed in BaTiS3, a quasi-1D hexagonal chalcogenide. Single-crystal X-ray diffraction studies reveal the presence of antipolar displacements of Ti atoms within adjacent TiS6 chains along the c-axis, and threefold degenerate Ti displacements in the a-b plane. 47/49Ti solid-state NMR provides additional evidence for those Ti displacements in the form of a three-horned NMR lineshape resulting from a low symmetry local environment around Ti atoms. Scanning transmission electron microscopy is used to directly observe the globally disordered Ti a-b plane displacements and find them to be ordered locally over a few unit cells. First-principles calculations show that the Ti a-b plane displacements selectively reduce the refractive index along the ab-plane, while having minimal impact on the refractive index along the chain direction, thus resulting in a giant enhancement in the optical anisotropy. By showing a strong connection between structural disorder with picoscale displacements and the optical response in BaTiS3, this study opens a pathway for designing optical materials with high refractive index and functionalities such as large optical anisotropy and nonlinearity.
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Affiliation(s)
- Boyang Zhao
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, 90089, USA
| | - Guodong Ren
- Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA
| | - Hongyan Mei
- Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Vincent C Wu
- Materials Department and Materials Research Laboratory, University of California, Santa Barbara, CA, 93106, USA
| | - Shantanu Singh
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, 90089, USA
| | - Gwan Yeong Jung
- Department of Mechanical Engineering and Materials Science, Washington University in St. Louis, St. Louis, MO, 63130, USA
| | - Huandong Chen
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, 90089, USA
| | - Raynald Giovine
- Materials Department and Materials Research Laboratory, University of California, Santa Barbara, CA, 93106, USA
| | - Shanyuan Niu
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, 90089, USA
- College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures, Nanjing University, Nanjing, 210093, China
| | - Arashdeep S Thind
- Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA
| | - Jad Salman
- Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Nick S Settineri
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Bryan C Chakoumakos
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Michael E Manley
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Raphael P Hermann
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Andrew R Lupini
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Miaofang Chi
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Jordan A Hachtel
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Arkadiy Simonov
- Department of Materials, ETH Zurich, Vladimir-Prelog-Weg 1-5/10, Zürich, 8093, Switzerland
| | - Simon J Teat
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Raphaële J Clément
- Materials Department and Materials Research Laboratory, University of California, Santa Barbara, CA, 93106, USA
| | - Mikhail A Kats
- Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Jayakanth Ravichandran
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, 90089, USA
- Ming Hsieh Department of Electrical Engineering, University of Southern California, Los Angeles, CA, 90089, USA
- Core Center of Excellence in Nano Imaging, University of Southern California, Los Angeles, CA, 90089, USA
| | - Rohan Mishra
- Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA
- Department of Mechanical Engineering and Materials Science, Washington University in St. Louis, St. Louis, MO, 63130, USA
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3
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Mei H, Ren G, Zhao B, Salman J, Jung GY, Chen H, Singh S, Thind AS, Cavin J, Hachtel JA, Chi M, Niu S, Joe G, Wan C, Settineri N, Teat SJ, Chakoumakos BC, Ravichandran J, Mishra R, Kats MA. Colossal Optical Anisotropy from Atomic-Scale Modulations. Adv Mater 2023; 35:e2303588. [PMID: 37529860 DOI: 10.1002/adma.202303588] [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: 04/18/2023] [Revised: 07/18/2023] [Indexed: 08/03/2023]
Abstract
Materials with large birefringence (Δn, where n is the refractive index) are sought after for polarization control (e.g., in wave plates, polarizing beam splitters, etc.), nonlinear optics, micromanipulation, and as a platform for unconventional light-matter coupling, such as hyperbolic phonon polaritons. Layered 2D materials can feature some of the largest optical anisotropy; however, their use in most optical systems is limited because their optical axis is out of the plane of the layers and the layers are weakly attached. This work demonstrates that a bulk crystal with subtle periodic modulations in its structure-Sr9/8 TiS3 -is transparent and positive-uniaxial, with extraordinary index ne = 4.5 and ordinary index no = 2.4 in the mid- to far-infrared. The excess Sr, compared to stoichiometric SrTiS3 , results in the formation of TiS6 trigonal-prismatic units that break the chains of face-sharing TiS6 octahedra in SrTiS3 into periodic blocks of five TiS6 octahedral units. The additional electrons introduced by the excess Sr form highly oriented electron clouds, which selectively boost the extraordinary index ne and result in record birefringence (Δn > 2.1 with low loss). The connection between subtle structural modulations and large changes in refractive index suggests new categories of anisotropic materials and also tunable optical materials with large refractive-index modulation.
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Affiliation(s)
- Hongyan Mei
- Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Guodong Ren
- Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA
| | - Boyang Zhao
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, 90089, USA
| | - Jad Salman
- Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Gwan Yeong Jung
- Department of Mechanical Engineering and Material Science, Washington University in St. Louis, St. Louis, MO, 63130, USA
| | - Huandong Chen
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, 90089, USA
| | - Shantanu Singh
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, 90089, USA
| | - Arashdeep S Thind
- Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA
| | - John Cavin
- Department of Physics, Washington University in St. Louis, St. Louis, MO, 63130, USA
| | - Jordan A Hachtel
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Miaofang Chi
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Shanyuan Niu
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, 90089, USA
| | - Graham Joe
- Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Chenghao Wan
- Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
- Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Nick Settineri
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Simon J Teat
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Bryan C Chakoumakos
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Jayakanth Ravichandran
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, 90089, USA
- Ming Hsieh Department of Electrical Engineering, University of Southern California, Los Angeles, CA, 90089, USA
- Core Center for Excellence in NanoImaging, University of Southern California, Los Angeles, CA, 90089, USA
| | - Rohan Mishra
- Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA
- Department of Mechanical Engineering and Material Science, Washington University in St. Louis, St. Louis, MO, 63130, USA
- Department of Physics, Washington University in St. Louis, St. Louis, MO, 63130, USA
| | - Mikhail A Kats
- Department of Electrical and Computer Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
- Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI, 53706, USA
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4
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Chen H, Zhao B, Mutch J, Jung GY, Ren G, Shabani S, Seewald E, Niu S, Wu J, Wang N, Surendran M, Singh S, Luo J, Ohtomo S, Goh G, Chakoumakos BC, Teat SJ, Melot B, Wang H, Pasupathy AN, Mishra R, Chu JH, Ravichandran J. Charge Density Wave Order and Electronic Phase Transitions in a Dilute d-Band Semiconductor. Adv Mater 2023:e2303283. [PMID: 37540897 DOI: 10.1002/adma.202303283] [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: 04/08/2023] [Revised: 07/31/2023] [Indexed: 08/06/2023]
Abstract
As one of the most fundamental physical phenomena, charge density wave (CDW) order predominantly occurs in metallic systems such as quasi-1D metals, doped cuprates, and transition metal dichalcogenides, where it is well understood in terms of Fermi surface nesting and electron-phonon coupling mechanisms. On the other hand, CDW phenomena in semiconducting systems, particularly at the low carrier concentration limit, are less common and feature intricate characteristics, which often necessitate the exploration of novel mechanisms, such as electron-hole coupling or Mott physics, to explain. In this study, an approach combining electrical transport, synchrotron X-ray diffraction, and density-functional theory calculations is used to investigate CDW order and a series of hysteretic phase transitions in a dilute d-band semiconductor, BaTiS3 . These experimental and theoretical findings suggest that the observed CDW order and phase transitions in BaTiS3 may be attributed to both electron-phonon coupling and non-negligible electron-electron interactions in the system. This work highlights BaTiS3 as a unique platform to explore CDW physics and novel electronic phases in the dilute filling limit and opens new opportunities for developing novel electronic devices.
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Affiliation(s)
- Huandong Chen
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, 90089, USA
| | - Boyang Zhao
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, 90089, USA
| | - Josh Mutch
- Department of Physics, University of Washington, Seattle, WA, 98195, USA
| | - Gwan Yeong Jung
- Department of Mechanical Engineering and Materials Science, Washington University in St. Louis, St. Louis, MO, 63130, USA
| | - Guodong Ren
- Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA
| | - Sara Shabani
- Department of Physics, Columbia University, New York, NY, 10027, USA
| | - Eric Seewald
- Department of Physics, Columbia University, New York, NY, 10027, USA
| | - Shanyuan Niu
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, 90089, USA
| | - Jiangbin Wu
- Ming Hsieh Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, CA, 90089, USA
| | - Nan Wang
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, 90089, USA
| | - Mythili Surendran
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, 90089, USA
- Core Center for Excellence in Nano Imaging, University of Southern California, Los Angeles, CA, 90089, USA
| | - Shantanu Singh
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, 90089, USA
| | - Jiang Luo
- Department of Chemistry, Washington University in St. Louis, St. Louis, MO, 63130, USA
| | - Sanae Ohtomo
- Department of Physics, University of Washington, Seattle, WA, 98195, USA
| | - Gemma Goh
- Department of Chemistry, University of Southern California, Los Angeles, CA, 90089, USA
| | - Bryan C Chakoumakos
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Simon J Teat
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Brent Melot
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, 90089, USA
- Department of Chemistry, University of Southern California, Los Angeles, CA, 90089, USA
| | - Han Wang
- Ming Hsieh Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, CA, 90089, USA
| | - Abhay N Pasupathy
- Department of Physics, Columbia University, New York, NY, 10027, USA
| | - Rohan Mishra
- Department of Mechanical Engineering and Materials Science, Washington University in St. Louis, St. Louis, MO, 63130, USA
- Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA
| | - Jiun-Haw Chu
- Department of Physics, University of Washington, Seattle, WA, 98195, USA
| | - Jayakanth Ravichandran
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, 90089, USA
- Ming Hsieh Department of Electrical and Computer Engineering, University of Southern California, Los Angeles, CA, 90089, USA
- Core Center for Excellence in Nano Imaging, University of Southern California, Los Angeles, CA, 90089, USA
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5
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Ren G, Jung GY, Wang C, Chen H, Zhao B, Vasudevan RK, Lupini AR, Chi M, Hachtel JA, Xiao D, Ravichandran J, Mishra R. Direct Observation of Strain-induced Ferrochiral Transition in Quasi-1D BaTiS3. Microsc Microanal 2023; 29:1624-1625. [PMID: 37613915 DOI: 10.1093/micmic/ozad067.834] [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] [Subscribe] [Scholar Register] [Indexed: 08/25/2023]
Affiliation(s)
- Guodong Ren
- Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, MO, United States
| | - Gwan Yeong Jung
- Department of Mechanical Engineering and Material Science, Washington University in St. Louis, St. Louis, MO, United States
| | - Chong Wang
- Department of Materials Science and Engineering, University of Washington, Seattle, WA, United States
| | - Huandong Chen
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, United States
| | - Boyang Zhao
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, United States
| | - Rama K Vasudevan
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United States
| | - Andrew R Lupini
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United States
| | - Miaofang Chi
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United States
| | - Jordan A Hachtel
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, TN, United States
| | - Di Xiao
- Department of Materials Science and Engineering, University of Washington, Seattle, WA, United States
| | - Jayakanth Ravichandran
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, CA, United States
- Ming Hsieh Department of Electrical Engineering, University of Southern California, Los Angeles, CA, United States
| | - Rohan Mishra
- Institute of Materials Science and Engineering, Washington University in St. Louis, St. Louis, MO, United States
- Department of Mechanical Engineering and Material Science, Washington University in St. Louis, St. Louis, MO, United States
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6
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Cho J, Lim T, Kim H, Meng L, Kim J, Lee S, Lee JH, Jung GY, Lee KS, Viñes F, Illas F, Exner KS, Joo SH, Choi CH. Importance of broken geometric symmetry of single-atom Pt sites for efficient electrocatalysis. Nat Commun 2023; 14:3233. [PMID: 37270530 DOI: 10.1038/s41467-023-38964-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 05/24/2023] [Indexed: 06/05/2023] Open
Abstract
Platinum single-atom catalysts hold promise as a new frontier in heterogeneous electrocatalysis. However, the exact chemical nature of active Pt sites is highly elusive, arousing many hypotheses to compensate for the significant discrepancies between experiments and theories. Here, we identify the stabilization of low-coordinated PtII species on carbon-based Pt single-atom catalysts, which have rarely been found as reaction intermediates of homogeneous PtII catalysts but have often been proposed as catalytic sites for Pt single-atom catalysts from theory. Advanced online spectroscopic studies reveal multiple identities of PtII moieties on the single-atom catalysts beyond ideally four-coordinated PtII-N4. Notably, decreasing Pt content to 0.15 wt.% enables the differentiation of low-coordinated PtII species from the four-coordinated ones, demonstrating their critical role in the chlorine evolution reaction. This study may afford general guidelines for achieving a high electrocatalytic performance of carbon-based single-atom catalysts based on other d8 metal ions.
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Affiliation(s)
- Junsic Cho
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
| | - Taejung Lim
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Haesol Kim
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
| | - Ling Meng
- Departament de Ciència de Materials i Quı́mica Fı́sica & Institut de Quı́mica Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/ Martí i Franquès 1-11, 08028, Barcelona, Spain
| | - Jinjong Kim
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
- Department of Chemistry, Seoul National University, Seoul, 08826, Republic of Korea
| | - Seunghoon Lee
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
| | - Jong Hoon Lee
- UNIST Central Research Facilities (UCRF), Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Gwan Yeong Jung
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Kug-Seung Lee
- Beamline Department, Pohang Accelerator Laboratory, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea
| | - Francesc Viñes
- Departament de Ciència de Materials i Quı́mica Fı́sica & Institut de Quı́mica Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/ Martí i Franquès 1-11, 08028, Barcelona, Spain
| | - Francesc Illas
- Departament de Ciència de Materials i Quı́mica Fı́sica & Institut de Quı́mica Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/ Martí i Franquès 1-11, 08028, Barcelona, Spain
| | - Kai S Exner
- Faculty of Chemistry, Theoretical Inorganic Chemistry, University of Duisburg-Essen, 45141 Essen, Germany; Cluster of Excellence RESOLV, 44801 Bochum, Germany; Center for Nanointegration Duisburg-Essen (CENIDE), 47057, Duisburg, Germany.
| | - Sang Hoon Joo
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea.
- Department of Chemistry, Seoul National University, Seoul, 08826, Republic of Korea.
| | - Chang Hyuck Choi
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, 37673, Republic of Korea.
- Institute for Convergence Research and Education in Advanced Technology (I-CREATE), Yonsei University, Seoul, 03722, Republic of Korea.
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7
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Kim J, Jeong J, Jung GY, Lee J, Lee JE, Baek K, Kang SJ, Kwak SK, Hwang C, Song HK. Amphi-Active Superoxide-Solvating Charge Redox Mediator for Highly Stable Lithium-Oxygen Batteries. ACS Appl Mater Interfaces 2022; 14:40793-40800. [PMID: 36044267 DOI: 10.1021/acsami.2c07400] [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: 06/15/2023]
Abstract
A multifunctional electrolyte additive for lithium oxygen batteries (LOBs) was designed to have (1) a redox-active moiety to mediate decomposition of lithium peroxide (Li2O2 as the final discharge product) during charging and (2) a solvent moiety to solvate and stabilize lithium superoxide (LiO2 as the intermediate discharge product) in electrolyte during discharging. 4-Acetamido-TEMPO (TEMPO = 2,2,6,6-tetramethylpiperidin-1-yl)oxyl) or AAT was employed as the additive working for both charge and discharge processes (amphi-active). The redox-active moiety was rooted in TEMPO, while the acetamido (AA) functional group inherited the high donor number (DN) of N,N-dimethylacetamide (DMAc). Integrating two functional moieties (TEMPO and AA) into a single molecule resulted in the bifunctionality of AAT (1) facilitating Li2O2 decomposition by the TEMPO moiety and (2) encouraging the solvent mechanism of Li2O2 formation by the high-DN AA moiety. Significantly improved LOB performances were achieved by the superoxide-solvating charge redox mediator, which were not obtained by a simple cocktail of TEMPO and DMAc.
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Affiliation(s)
- Jonghak Kim
- School of Energy and Chemical Engineering, UNIST, Ulsan 44919, Korea
| | - Jinhyeon Jeong
- School of Energy and Chemical Engineering, UNIST, Ulsan 44919, Korea
| | - Gwan Yeong Jung
- Department of Mechanical Engineering & Materials Science, Washington University in St. Louis, St. Louis, Missouri 63130 United States
| | - Jeongin Lee
- School of Energy and Chemical Engineering, UNIST, Ulsan 44919, Korea
| | - Ji Eun Lee
- School of Energy and Chemical Engineering, UNIST, Ulsan 44919, Korea
| | - Kyungeun Baek
- School of Energy and Chemical Engineering, UNIST, Ulsan 44919, Korea
| | - Seok Ju Kang
- School of Energy and Chemical Engineering, UNIST, Ulsan 44919, Korea
| | - Sang Kyu Kwak
- School of Energy and Chemical Engineering, UNIST, Ulsan 44919, Korea
| | - Chihyun Hwang
- School of Energy and Chemical Engineering, UNIST, Ulsan 44919, Korea
| | - Hyun-Kon Song
- School of Energy and Chemical Engineering, UNIST, Ulsan 44919, Korea
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8
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Park S, Kristanto I, Jung GY, Ahn DB, Jeong K, Kwak SK, Lee SY. A single-ion conducting covalent organic framework for aqueous rechargeable Zn-ion batteries. Chem Sci 2020; 11:11692-11698. [PMID: 34123199 PMCID: PMC8162792 DOI: 10.1039/d0sc02785e] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Despite their potential as promising alternatives to current state-of-the-art lithium-ion batteries, aqueous rechargeable Zn-ion batteries are still far away from practical applications. Here, we present a new class of single-ion conducting electrolytes based on a zinc sulfonated covalent organic framework (TpPa-SO3Zn0.5) to address this challenging issue. TpPa-SO3Zn0.5 is synthesised to exhibit single Zn2+ conduction behaviour via its delocalised sulfonates that are covalently tethered to directional pores and achieve structural robustness by its β-ketoenamine linkages. Driven by these structural and physicochemical features, TpPa-SO3Zn0.5 improves the redox reliability of the Zn metal anode and acts as an ionomeric buffer layer for stabilising the MnO2 cathode. Such improvements in the TpPa-SO3Zn0.5–electrode interfaces, along with the ion transport phenomena, enable aqueous Zn–MnO2 batteries to exhibit long-term cyclability, demonstrating the viability of COF-mediated electrolytes for Zn-ion batteries. A zinc sulfonated covalent organic framework is presented as a new single-ion conducting electrolyte for aqueous rechargeable Zn-ion batteries.![]()
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Affiliation(s)
- Sodam Park
- Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea
| | - Imanuel Kristanto
- Department of Chemical Engineering, School of Energy and Chemical Engineering, UNIST Ulsan 44919 Republic of Korea
| | - Gwan Yeong Jung
- Department of Chemical Engineering, School of Energy and Chemical Engineering, UNIST Ulsan 44919 Republic of Korea
| | - David B Ahn
- Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea
| | - Kihun Jeong
- Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea
| | - Sang Kyu Kwak
- Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea
| | - Sang-Young Lee
- Department of Chemical and Biomolecular Engineering, Yonsei University 50 Yonsei-ro, Seodaemun-gu Seoul 120-749 Republic of Korea
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9
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Kim JH, Kim S, Park SO, Jung GY, Song S, Sohn A, Kim S, Kwak SK, Kwon S, Lee Z. Antiphase Boundaries as Faceted Metallic Wires in 2D Transition Metal Dichalcogenides. Adv Sci (Weinh) 2020; 7:2000788. [PMID: 32775161 PMCID: PMC7404160 DOI: 10.1002/advs.202000788] [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] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2020] [Revised: 03/26/2020] [Indexed: 06/11/2023]
Abstract
Antiphase boundaries (APBs) in 2D transition metal dichalcogenides have attracted wide interest as 1D metallic wires embedded in a semiconducting matrix, which could be exploited in fully 2D-integrated circuits. Here, the anisotropic morphologies of APBs (i.e., linear and saw-toothed APBs) in the nanoscale are investigated. The experimental and computational results show that despite their anisotropic nanoscale morphologies, all APBs adopt a predominantly chalcogen-oriented dense structure to maintain the energetically most stable atomic configuration. Moreover, the effect of the nanoscale morphology of an APB on electron transport from two-probe field effect transistor measurements is investigated. A saw-toothed APB has a considerably lower electron mobility than a linear APB, indicating that kinks between facets are the main factors of scattering. The observations contribute to the systematical understanding of the faceted APBs and its impact on electrical transport behavior and it could potentially extend the applications of 2D materials through defect engineering to achieve the desired properties.
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Affiliation(s)
- Jung Hwa Kim
- School of Materials Science and EngineeringUlsan National Institute of Science and Technology (UNIST)Ulsan44919Republic of Korea
- Center for Multidimensional Carbon MaterialsInstitute for Basic Science (IBS)Ulsan44919Republic of Korea
| | - Se‐Yang Kim
- School of Materials Science and EngineeringUlsan National Institute of Science and Technology (UNIST)Ulsan44919Republic of Korea
| | - Sung O. Park
- Department of Energy EngineeringSchool of Energy and Chemical EngineeringUlsan National Institute of Science and Technology (UNIST)Ulsan44919Republic of Korea
| | - Gwan Yeong Jung
- Department of Energy EngineeringSchool of Energy and Chemical EngineeringUlsan National Institute of Science and Technology (UNIST)Ulsan44919Republic of Korea
| | - Seunguk Song
- School of Materials Science and EngineeringUlsan National Institute of Science and Technology (UNIST)Ulsan44919Republic of Korea
| | - Ahrum Sohn
- School of Advanced Materials Science and EngineeringSungkyunkwan University (SKKU)Suwon16419Republic of Korea
| | - Sang‐Woo Kim
- School of Advanced Materials Science and EngineeringSungkyunkwan University (SKKU)Suwon16419Republic of Korea
| | - Sang Kyu Kwak
- Center for Multidimensional Carbon MaterialsInstitute for Basic Science (IBS)Ulsan44919Republic of Korea
- Department of Energy EngineeringSchool of Energy and Chemical EngineeringUlsan National Institute of Science and Technology (UNIST)Ulsan44919Republic of Korea
| | - Soon‐Yong Kwon
- School of Materials Science and EngineeringUlsan National Institute of Science and Technology (UNIST)Ulsan44919Republic of Korea
| | - Zonghoon Lee
- School of Materials Science and EngineeringUlsan National Institute of Science and Technology (UNIST)Ulsan44919Republic of Korea
- Center for Multidimensional Carbon MaterialsInstitute for Basic Science (IBS)Ulsan44919Republic of Korea
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10
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Lim T, Jung GY, Kim JH, Park SO, Park J, Kim YT, Kang SJ, Jeong HY, Kwak SK, Joo SH. Atomically dispersed Pt-N 4 sites as efficient and selective electrocatalysts for the chlorine evolution reaction. Nat Commun 2020; 11:412. [PMID: 31964881 PMCID: PMC6972710 DOI: 10.1038/s41467-019-14272-1] [Citation(s) in RCA: 77] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Accepted: 12/23/2019] [Indexed: 11/23/2022] Open
Abstract
Chlorine evolution reaction (CER) is a critical anode reaction in chlor-alkali electrolysis. Although precious metal-based mixed metal oxides (MMOs) have been widely used as CER catalysts, they suffer from the concomitant generation of oxygen during the CER. Herein, we demonstrate that atomically dispersed Pt−N4 sites doped on a carbon nanotube (Pt1/CNT) can catalyse the CER with excellent activity and selectivity. The Pt1/CNT catalyst shows superior CER activity to a Pt nanoparticle-based catalyst and a commercial Ru/Ir-based MMO catalyst. Notably, Pt1/CNT exhibits near 100% CER selectivity even in acidic media, with low Cl− concentrations (0.1 M), as well as in neutral media, whereas the MMO catalyst shows substantially lower CER selectivity. In situ electrochemical X-ray absorption spectroscopy reveals the direct adsorption of Cl− on Pt−N4 sites during the CER. Density functional theory calculations suggest the PtN4C12 site as the most plausible active site structure for the CER. Chlorine evolution reaction (CER) is a key electrochemical reaction for chemical, pulp, and paper industries, and water treatments. Here, the authors report that an atomically dispersed Pt−N4 site can catalyse CER with high activity and selectivity under a wide range of Cl– concentrations and pH.
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Affiliation(s)
- Taejung Lim
- Department of Energy Engineering and School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan, 44919, Republic of Korea
| | - Gwan Yeong Jung
- Department of Energy Engineering and School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan, 44919, Republic of Korea
| | - Jae Hyung Kim
- Department of Energy Engineering and School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan, 44919, Republic of Korea
| | - Sung O Park
- Department of Energy Engineering and School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan, 44919, Republic of Korea
| | - Jaehyun Park
- Department of Energy Engineering and School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan, 44919, Republic of Korea
| | - Yong-Tae Kim
- Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Pohang, Gyeongbuk, 37673, Republic of Korea
| | - Seok Ju Kang
- Department of Energy Engineering and School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan, 44919, Republic of Korea
| | - Hu Young Jeong
- UNIST Central Research Facilities, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan, 44919, Republic of Korea
| | - Sang Kyu Kwak
- Department of Energy Engineering and School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan, 44919, Republic of Korea.
| | - Sang Hoon Joo
- Department of Energy Engineering and School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan, 44919, Republic of Korea.
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11
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Seo B, Jung GY, Lee SJ, Baek DS, Sa YJ, Ban HW, Son JS, Park K, Kwak SK, Joo SH. Monomeric MoS42–-Derived Polymeric Chains with Active Molecular Units for Efficient Hydrogen Evolution Reaction. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02700] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bora Seo
- Department of Energy Engineering and School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea
- Clean Energy Research Center, Korea Institute of Science and Technology (KIST), 5 Hwarang-ro 14-gil, Seoul 02792, Republic of Korea
| | - Gwan Yeong Jung
- Department of Energy Engineering and School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Se Jeong Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Daejeon 34141, Republic of Korea
| | - Du San Baek
- Department of Energy Engineering and School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Young Jin Sa
- Department of Chemistry, Kwangwoon University, 20 Gwangwoon-ro, Seoul 01897, Republic of Korea
| | - Hyeong Woo Ban
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Jae Sung Son
- School of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Kiyoung Park
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Daejeon 34141, Republic of Korea
| | - Sang Kyu Kwak
- Department of Energy Engineering and School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Sang Hoon Joo
- Department of Energy Engineering and School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea
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12
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Cho SK, Jung GY, Choi KH, Lee J, Yoo J, Kwak SK, Lee SY. Antioxidative Lithium Reservoir Based on Interstitial Channels of Carbon Nanotube Bundles. Nano Lett 2019; 19:5879-5884. [PMID: 31141382 DOI: 10.1021/acs.nanolett.9b01334] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Lithium (Li) metal has garnered considerable attention in next-generation battery anodes. However, its environmental vulnerability, along with the electrochemical instability and safety failures, poses a formidable challenge to commercial use. Here, we describe a new class of antioxidative Li reservoir based on interstitial channels of single-walled carbon nanotube (SWCNT) bundles. The Li preferentially confined in the interstitial channels exhibits unusual thermodynamic stability and exceptional capacity even after exposure to harsh environmental conditions, thereby enabling us to propose a new lithiation/delithiation mechanism in carbon nanotubes. To explore practical application of this approach, the Li confined in the SWCNT bundles is electrochemically extracted and subsequently plated on a copper foil. The resulting Li-plated copper foil shows reliable charge/discharge behavior comparable to those of pristine Li foils. Benefiting from the confinement effect of the interstitial channels, the SWCNT bundles hold great promise as an environmentally tolerant, high-capacity Li reservoir.
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Affiliation(s)
- Seok-Kyu Cho
- Department of Energy Engineering, School of Energy and Chemical Engineering , Ulsan National Institute of Science and Technology (UNIST) , Ulsan 44919 , Republic of Korea
| | - Gwan Yeong Jung
- Department of Energy Engineering, School of Energy and Chemical Engineering , Ulsan National Institute of Science and Technology (UNIST) , Ulsan 44919 , Republic of Korea
| | - Keun-Ho Choi
- ubatt Inc. , Migun Techno World 2-116, Daejeon 34025 , Republic of Korea
| | - Jiyun Lee
- Department of Energy Engineering, School of Energy and Chemical Engineering , Ulsan National Institute of Science and Technology (UNIST) , Ulsan 44919 , Republic of Korea
| | - JongTae Yoo
- R&D Investment Planning Team , Korea Institute of S&T Evaluation and Planning (KISTEP) , Seoul 06775 , Republic of Korea
| | - Sang Kyu Kwak
- Department of Energy Engineering, School of Energy and Chemical Engineering , Ulsan National Institute of Science and Technology (UNIST) , Ulsan 44919 , Republic of Korea
| | - Sang-Young Lee
- Department of Energy Engineering, School of Energy and Chemical Engineering , Ulsan National Institute of Science and Technology (UNIST) , Ulsan 44919 , Republic of Korea
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13
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Hwang C, Yoo J, Jung GY, Joo SH, Kim J, Cha A, Han JG, Choi NS, Kang SJ, Lee SY, Kwak SK, Song HK. Biomimetic Superoxide Disproportionation Catalyst for Anti-Aging Lithium-Oxygen Batteries. ACS Nano 2019; 13:9190-9197. [PMID: 31319025 DOI: 10.1021/acsnano.9b03525] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Reactive oxygen species or superoxide (O2-), which damages or ages biological cells, is generated during metabolic pathways using oxygen as an electron acceptor in biological systems. Superoxide dismutase (SOD) protects cells from superoxide-triggered apoptosis by converting superoxide to oxygen and peroxide. Lithium-oxygen battery (LOB) cells have the same aging problems caused by superoxide-triggered side reactions. We transplanted the function of SOD of biological systems into LOB cells. Malonic acid-decorated fullerene (MA-C60) was used as a superoxide disproportionation chemocatalyst mimicking the function of SOD. As expected, MA-C60 as the superoxide scavenger improved capacity retention along charge/discharge cycles successfully. A LOB cell that failed to provide a meaningful capacity just after several cycles at high current (0.5 mA cm-2) with 0.5 mAh cm-2 cutoff survived up to 50 cycles after MA-C60 was introduced to the electrolyte. Moreover, the SOD-mimetic catalyst increased capacity, e.g., more than a 6-fold increase at 0.2 mA cm-2. The experimentally observed toroidal morphology of the final discharge product of oxygen reduction (Li2O2) and density functional theory calculation confirmed that the solution mechanism of Li2O2 formation, more beneficial than the surface mechanism from the capacity-gain standpoint, was preferred in the presence of MA-C60.
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Affiliation(s)
| | - JongTae Yoo
- R&D Investment Planning Team , Korea Institute of Science & Technology Evaluation and Planning (KISTEP) , Seoul 06775 , Republic of Korea
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14
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Shang X, Song I, Lee JH, Choi W, Ohtsu H, Jung GY, Ahn J, Han M, Koo JY, Kawano M, Kwak SK, Oh JH. Heterochiral Doped Supramolecular Coordination Networks for High-Performance Optoelectronics. ACS Appl Mater Interfaces 2019; 11:20174-20182. [PMID: 31045348 DOI: 10.1021/acsami.9b04653] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Chiral self-sorting has great potential for constructing new complex structures and determining chirality-dependent properties in multicomponent mixtures. However, it is still of great challenge to achieve high fidelity chiral self-discrimination. Besides, the researches on the coordination polymers or metal-organic frameworks for micro/nanooptoelectronics are still rare due to their low conductivity and difficulty in developing a rapid and simple scale-up synthetic method. Here, heterochiral supramolecular coordination networks (SCNs) were synthesized by the solvothermal reaction of naphthalene diimide enantiomers and cadmium iodide, using the chirality as a synthetic tuning parameter to control the morphologies. Intriguingly, heterochiral micro/nanocrystals exhibited photochromic and photodetecting properties. Furthermore, we also developed a simple and efficient doping method to enhance the conductivity and photoresponsivity of micro/nanocrystals using hydrazine. From experimental and theoretical studies, the mechanism was suggested as follows: the radicals in the singly occupied molecular orbital level of the ligands provide charge carriers that can undergo "through-space" transport between π-π stacked ligands and the electron transfer from adsorbed hydrazine to the SCNs results in reduction of energy gap, leading to increased conductivity. Our findings demonstrate a simple and powerful strategy for implementing coordination networks with redox ligands for micro/nanooptoelectronic applications.
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Affiliation(s)
- Xiaobo Shang
- School of Chemical and Biological Engineering, Institute of Chemical Processes , Seoul National University , 1 Gwanak-ro , Gwanak-gu, Seoul 08826 , Republic of Korea
| | - Inho Song
- School of Chemical and Biological Engineering, Institute of Chemical Processes , Seoul National University , 1 Gwanak-ro , Gwanak-gu, Seoul 08826 , Republic of Korea
| | - Jeong Hyeon Lee
- Department of Energy Engineering, School of Energy and Chemical Engineering , Ulsan National Institute of Science and Technology (UNIST) , Ulsan 44919 , Republic of Korea
| | | | - Hiroyoshi Ohtsu
- Department of Chemistry, School of Science , Tokyo Institute of Technology , 2-12-1 Ookayama , Meguro-ku, Tokyo 152-8550 , Japan
| | - Gwan Yeong Jung
- Department of Energy Engineering, School of Energy and Chemical Engineering , Ulsan National Institute of Science and Technology (UNIST) , Ulsan 44919 , Republic of Korea
| | - Jaeyong Ahn
- School of Chemical and Biological Engineering, Institute of Chemical Processes , Seoul National University , 1 Gwanak-ro , Gwanak-gu, Seoul 08826 , Republic of Korea
| | | | | | - Masaki Kawano
- Department of Chemistry, School of Science , Tokyo Institute of Technology , 2-12-1 Ookayama , Meguro-ku, Tokyo 152-8550 , Japan
| | - Sang Kyu Kwak
- Department of Energy Engineering, School of Energy and Chemical Engineering , Ulsan National Institute of Science and Technology (UNIST) , Ulsan 44919 , Republic of Korea
| | - Joon Hak Oh
- School of Chemical and Biological Engineering, Institute of Chemical Processes , Seoul National University , 1 Gwanak-ro , Gwanak-gu, Seoul 08826 , Republic of Korea
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15
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Oh NK, Kim C, Lee J, Kwon O, Choi Y, Jung GY, Lim HY, Kwak SK, Kim G, Park H. In-situ local phase-transitioned MoSe 2 in La 0.5Sr 0.5CoO 3-δ heterostructure and stable overall water electrolysis over 1000 hours. Nat Commun 2019; 10:1723. [PMID: 30979877 PMCID: PMC6461638 DOI: 10.1038/s41467-019-09339-y] [Citation(s) in RCA: 46] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Accepted: 03/06/2019] [Indexed: 11/25/2022] Open
Abstract
Developing efficient bifunctional catalysts for overall water splitting that are earth-abundant, cost-effective, and durable is of considerable importance from the practical perspective to mitigate the issues associated with precious metal-based catalysts. Herein, we introduce a heterostructure comprising perovskite oxides (La0.5Sr0.5CoO3–δ) and molybdenum diselenide (MoSe2) as an electrochemical catalyst for overall water electrolysis. Interestingly, formation of the heterostructure of La0.5Sr0.5CoO3–δ and MoSe2 induces a local phase transition in MoSe2, 2 H to 1 T phase, and more electrophilic La0.5Sr0.5CoO3–δ with partial oxidation of the Co cation owing to electron transfer from Co to Mo. Together with these synergistic effects, the electrochemical activities are significantly improved for both hydrogen and oxygen evolution reactions. In the overall water splitting operation, the heterostructure showed excellent stability at the high current density of 100 mA cm−2 over 1,000 h, which is exceptionally better than the stability of the state-of-the-art platinum and iridium oxide couple. While catalysts are necessary for H2 and O2 production from water, developing materials capable of evolving both under the same conditions has proven challenging. Here, authors prepare perovskite-oxide and molybdenum sulfide heterostructures as bifunctional water-splitting electrocatalysts.
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Affiliation(s)
- Nam Khen Oh
- Department of Energy Engineering, School of Energy and Chemical Engineering, Low Dimensional Carbon Materials Center, Perovtronics Research Center, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Changmin Kim
- Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Junghyun Lee
- Department of Energy Engineering, School of Energy and Chemical Engineering, Low Dimensional Carbon Materials Center, Perovtronics Research Center, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Ohhun Kwon
- Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Yunseong Choi
- Department of Energy Engineering, School of Energy and Chemical Engineering, Low Dimensional Carbon Materials Center, Perovtronics Research Center, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Gwan Yeong Jung
- Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Hyeong Yong Lim
- Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Sang Kyu Kwak
- Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea.
| | - Guntae Kim
- Department of Energy Engineering, School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea.
| | - Hyesung Park
- Department of Energy Engineering, School of Energy and Chemical Engineering, Low Dimensional Carbon Materials Center, Perovtronics Research Center, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea.
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16
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Jeong K, Park S, Jung GY, Kim SH, Lee YH, Kwak SK, Lee SY. Solvent-Free, Single Lithium-Ion Conducting Covalent Organic Frameworks. J Am Chem Soc 2019; 141:5880-5885. [PMID: 30888813 DOI: 10.1021/jacs.9b00543] [Citation(s) in RCA: 123] [Impact Index Per Article: 24.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Porous crystalline materials such as covalent organic frameworks and metal-organic frameworks have garnered considerable attention as promising ion conducting media. However, most of them additionally incorporate lithium salts and/or solvents inside the pores of frameworks, thus failing to realize solid-state single lithium-ion conduction behavior. Herein, we demonstrate a lithium sulfonated covalent organic framework (denoted as TpPa-SO3Li) as a new class of solvent-free, single lithium-ion conductors. Benefiting from well-designed directional ion channels, a high number density of lithium-ions, and covalently tethered anion groups, TpPa-SO3Li exhibits an ionic conductivity of 2.7 × 10-5 S cm-1 with a lithium-ion transference number of 0.9 at room temperature and an activation energy of 0.18 eV without additionally incorporating lithium salts and organic solvents. Such unusual ion transport phenomena of TpPa-SO3Li allow reversible and stable lithium plating/stripping on lithium metal electrodes, demonstrating its potential use for lithium metal electrodes.
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Sa YJ, Park SO, Jung GY, Shin TJ, Jeong HY, Kwak SK, Joo SH. Heterogeneous Co–N/C Electrocatalysts with Controlled Cobalt Site Densities for the Hydrogen Evolution Reaction: Structure–Activity Correlations and Kinetic Insights. ACS Catal 2018. [DOI: 10.1021/acscatal.8b03446] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Young Jin Sa
- Department of Energy Engineering and School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea
- Clean Energy Research Center, Korea Institute of Science and Technology (KIST), 5 Hwarang-ro 14-gil, Seoul 02792, Republic of Korea
| | - Sung O Park
- Department of Energy Engineering and School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Gwan Yeong Jung
- Department of Energy Engineering and School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Tae Joo Shin
- UNIST Central Research Facility, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Hu Young Jeong
- UNIST Central Research Facility, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Sang Kyu Kwak
- Department of Energy Engineering and School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea
| | - Sang Hoon Joo
- Department of Energy Engineering and School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea
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18
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Shang X, Park CH, Jung GY, Kwak SK, Oh JH. Highly Enantioselective Graphene-Based Chemical Sensors Prepared by Chiral Noncovalent Functionalization. ACS Appl Mater Interfaces 2018; 10:36194-36201. [PMID: 30270614 DOI: 10.1021/acsami.8b13517] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [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
As a basic characteristic of the natural environment and living matter, chirality has been used in various scientific and technological fields. Chiral discrimination is of particular interest owing to its importance in catalysis, organic synthesis, biomedicine, and pharmaceutics. However, it is still very challenging to effectively and selectively sense and separate different enantiomers. Here, enantio-differentiating chemosensor systems have been developed through spontaneous chiral functionalization of the surface of graphene field-effect transistors (GFETs). GFET sensors functionalized using noncovalent interactions between graphene and a newly synthesized chiral-functionalized pyrene material, Boc-l-Phe-Pyrene, exhibit highly enantioselective detection of natural acryclic monoterpenoid enantiomers, that is, ( R)-(+)- and ( S)-(-)-β-citronellol. On the basis of a computational study, the origin of enantio-differentiation is assigned to the discriminable charge transfer from ( R)-(+)- or ( S)-(-)-β-citronellol into graphene with a significant difference in binding strength depending on surface morphology. The chemosensor system developed herein has great potential to be applied in miniaturized and rapid enantioselective sensing with high sensitivity and selectivity.
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Affiliation(s)
- Xiaobo Shang
- Department of Chemical Engineering , Pohang University of Science and Technology (POSTECH) , 77 Cheongam-ro , Pohang 37673 , Korea
- School of Chemical and Biological Engineering, Institute of Chemical Processes , Seoul National University , 1 Gwanak-ro , Gwanak-gu, Seoul 08826 , Korea
| | - Cheol Hee Park
- Department of Chemical Engineering , Pohang University of Science and Technology (POSTECH) , 77 Cheongam-ro , Pohang 37673 , Korea
- School of Chemical and Biological Engineering, Institute of Chemical Processes , Seoul National University , 1 Gwanak-ro , Gwanak-gu, Seoul 08826 , Korea
| | - Gwan Yeong Jung
- Department of Energy Engineering, School of Energy and Chemical Engineering , Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil , Ulsan 44919 , Korea
| | - Sang Kyu Kwak
- Department of Energy Engineering, School of Energy and Chemical Engineering , Ulsan National Institute of Science and Technology (UNIST) , 50 UNIST-gil , Ulsan 44919 , Korea
| | - Joon Hak Oh
- School of Chemical and Biological Engineering, Institute of Chemical Processes , Seoul National University , 1 Gwanak-ro , Gwanak-gu, Seoul 08826 , Korea
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19
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Shang X, Song I, Jung GY, Choi W, Ohtsu H, Lee JH, Koo JY, Liu B, Ahn J, Kawano M, Kwak SK, Oh JH. Chiral self-sorted multifunctional supramolecular biocoordination polymers and their applications in sensors. Nat Commun 2018; 9:3933. [PMID: 30258195 PMCID: PMC6158292 DOI: 10.1038/s41467-018-06147-8] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2017] [Accepted: 08/20/2018] [Indexed: 01/15/2023] Open
Abstract
Chiral supramolecules have great potential for use in chiral recognition, sensing, and catalysis. Particularly, chiral supramolecular biocoordination polymers (SBCPs) provide a versatile platform for characterizing biorelated processes such as chirality transcription. Here, we selectively synthesize homochiral and heterochiral SBCPs, composed of chiral naphthalene diimide ligands and Zn ions, from enantiomeric and mixed R-ligands and S-ligands, respectively. Notably, we find that the chiral self-sorted SBCPs exhibit multifunctional properties, including photochromic, photoluminescent, photoconductive, and chemiresistive characteristics, thus can be used for various sensors. Specifically, these materials can be used for detecting hazardous amine materials due to the electron transfer from the amine to the SBCP surface and for enantioselectively sensing a chiral species naproxen due to the different binding energies with regard to their chirality. These results provide guidelines for the synthesis of chiral SBCPs and demonstrate their versatility and feasibility for use in various sensors covering photoactive, chemiresistive, and chiral sensors.
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Affiliation(s)
- Xiaobo Shang
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea.,School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, 1, Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Inho Song
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea.,School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, 1, Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Gwan Yeong Jung
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan, 44919, Republic of Korea
| | - Wanuk Choi
- Center for Ordered Nanoporous Materials Synthesis, School of Environmental Science and Engineering (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea
| | - Hiroyoshi Ohtsu
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Jeong Hyeon Lee
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan, 44919, Republic of Korea
| | - Jin Young Koo
- Department of Chemistry, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea
| | - Bo Liu
- Department of Chemistry, Zhejiang University, 310027, Hangzhou, China
| | - Jaeyong Ahn
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea.,School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, 1, Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea
| | - Masaki Kawano
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo, 152-8550, Japan
| | - Sang Kyu Kwak
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), UNIST-gil 50, Ulsan, 44919, Republic of Korea.
| | - Joon Hak Oh
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 37673, Republic of Korea. .,School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, 1, Gwanak-ro, Gwanak-gu, Seoul, 08826, Republic of Korea.
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Park J, Shirai M, Jung GY, Park SO, Park M, Ryu J, Kwak SK, Cho J. Correlation of Low-Index Facets to Active Sites in Micrometer-Sized Polyhedral Pyrochlore Electrocatalyst. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01725] [Citation(s) in RCA: 7] [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: 11/28/2022]
Affiliation(s)
| | - Manabu Shirai
- Electron Microscope Application Group, Hitachi High-Technologies Corporation, 882 Ichige, Hitachinaka, Ibaraki 312-8504, Japan
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21
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Chung DY, Yoo JM, Park S, Jung GY, Kang JS, Ahn CY, Kwak SK, Sung YE. Edge-Terminated MoS 2 Nanoassembled Electrocatalyst via In Situ Hybridization with 3D Carbon Network. Small 2018; 14:e1802191. [PMID: 30095220 DOI: 10.1002/smll.201802191] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 07/08/2018] [Indexed: 06/08/2023]
Abstract
Transition metal dichalcogenides, especially MoS2 , are considered as promising electrocatalysts for hydrogen evolution reaction (HER). Since the physicochemical properties of MoS2 and electrode morphology are highly sensitive factor for HER performance, designed synthesis is highly pursued. Here, an in situ method to prepare a 3D carbon/MoS2 hybrid catalyst, motivated by the graphene ribbon synthesis process, is reported. By rational design strategies, the hybrid electrocatalysts with cross-connected porous structure are obtained, and they show a high HER activity even comparable to the state-of-the-art MoS2 catalyst without appreciable activity loss in long-term operations. Based on various physicochemical techniques, it is demonstrated that the synthetic procedure can effectively guide the formation of active site and 3D structure with a distinctive feature; increased exposure of active sites by decreased domain size and intrinsically high activity through controlling the number of stacking layers. Moreover, the importance of structural properties of the MoS2 -based catalysts is verified by controlled experiments, validating the effectiveness of the designed synthesis approach.
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Affiliation(s)
- Dong Young Chung
- Center for Nanoparticle Research, Institute for Basic Science (IBS), School of Chemical and Biological Engineering, Seoul National University (SNU), Seoul, 08826, Republic of Korea
| | - Ji Mun Yoo
- Center for Nanoparticle Research, Institute for Basic Science (IBS), School of Chemical and Biological Engineering, Seoul National University (SNU), Seoul, 08826, Republic of Korea
| | - Subin Park
- Center for Nanoparticle Research, Institute for Basic Science (IBS), School of Chemical and Biological Engineering, Seoul National University (SNU), Seoul, 08826, Republic of Korea
| | - Gwan Yeong Jung
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Jin Soo Kang
- Center for Nanoparticle Research, Institute for Basic Science (IBS), School of Chemical and Biological Engineering, Seoul National University (SNU), Seoul, 08826, Republic of Korea
| | - Chi-Yeong Ahn
- Center for Nanoparticle Research, Institute for Basic Science (IBS), School of Chemical and Biological Engineering, Seoul National University (SNU), Seoul, 08826, Republic of Korea
| | - Sang Kyu Kwak
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, Republic of Korea
| | - Yung-Eun Sung
- Center for Nanoparticle Research, Institute for Basic Science (IBS), School of Chemical and Biological Engineering, Seoul National University (SNU), Seoul, 08826, Republic of Korea
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Seo B, Jung GY, Kim JH, Shin TJ, Jeong HY, Kwak SK, Joo SH. Preferential horizontal growth of tungsten sulfide on carbon and insight into active sulfur sites for the hydrogen evolution reaction. Nanoscale 2018; 10:3838-3848. [PMID: 29417123 DOI: 10.1039/c7nr08161h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [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
Transition metal dichalcogenides (TMDs) have attracted considerable attention as active electrocatalysts for the hydrogen evolution reaction (HER). Since TMD catalysts are commonly supported on carbon to endow electrical conductivity, understanding the growth behaviour of TMDs on carbon surfaces is crucial, and yet remains to be explored. In this work, we investigated the growth behaviour of tungsten sulfide (WSx) on carbon surfaces inside the confined nanopores. Experimental and computational studies revealed the preferential bonding between the basal planes of WSx and carbon surfaces, as well as the subsequent horizontal growth of WSx. As a result, subnanometer WSx clusters were formed at a low WSx loading, and grew into monolayer WS2 nanoplates with increased WSx loadings. In contrast, a TMD analogue, MoS2, favors edge plane bonding with carbon surfaces and subsequent stacking of nanoplate layers, leading to multilayer MoS2 nanoplates with increased MoS2 loadings. A time-dependent growth of WSx further corroborated the formation of WS2 nanoplates at the expense of ultrasmall WSx nanoclusters. Interestingly, the sample prepared with a short sulfidation time, which was mainly comprised of WSx nanoclusters, showed higher HER activity compared to the sample prepared with a prolonged sulfidation time, which mostly contained WS2 nanoplates. The higher HER activity of WSx nanoclusters is attributed to the larger density of active bridging S22- sites, compared to the WS2 nanoplates. These findings may provide important insights into the growth behaviour of layered TMD materials at the nanoscale, as well as potential active species in WSx for the HER.
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Affiliation(s)
- Bora Seo
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 44919, Republic of Korea.
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Hwang C, Choi S, Jung GY, Yang J, Kwak SK, Park S, Song HK. Graphene-wrapped Porous Sb Anodes for Sodium-Ion Batteries by Mechanochemical Compositing and Metallomechanical Reduction of Sb2O3. Electrochim Acta 2017. [DOI: 10.1016/j.electacta.2017.08.166] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [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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Kim JH, Jung GY, Lee YH, Kim JH, Lee SY, Kwak SK, Lee SY. Polysulfide-Breathing/Dual-Conductive, Heterolayered Battery Separator Membranes Based on 0D/1D Mingled Nanomaterial Composite Mats. Nano Lett 2017; 17:2220-2228. [PMID: 28338328 DOI: 10.1021/acs.nanolett.6b04830] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Facile/sustainable utilization of sulfur active materials is an ultimate challenge in high-performance lithium-sulfur (Li-S) batteries. Here, as a membrane-driven approach to address this issue, we demonstrate a new class of polysulfide-breathing (capable of reversibly adsorbing and desorbing polysulfides)/dual (electron and ion) conductive, heterolayered battery separator membranes (denoted as "MEC-AA separators") based on 0D (nanoparticles)/1D (nanofibers) composite mats. The MEC-AA separator is fabricated through an in-series, concurrent electrospraying/electrospinning process. The top layer of the MEC-AA separator comprises close-packed mesoporous MCM-41 nanoparticles spatially besieged by multiwalled carbon nanotubes (MWNT) wrapped poly(ether imide) (PEI) nanofibers. The MCM-41 in the top layer shows reversible adsorption/desorption of polysulfides, and the MWNT-wrapped PEI nanofibers act as a dual-conductive upper current collector. Preferential deposition of the MWNTs along the PEI nanofibers and dispersion state of the separator components are elucidated theoretically using computational methods. The support layer, which consists of densely packed Al2O3 nanoparticles and polyacrylonitrile nanofibers, serves as a mechanically/thermally stable and polysulfide-capturing porous membrane. The unique structure and multifunctionality of the MEC-AA separator allow for substantial improvements in redox reaction kinetics and cycling performance of Li-S cells far beyond those achievable with conventional polyolefin separators. The heterolayered nanomat-based membrane strategy opens a new route toward electrochemically active/permselective advanced battery separators.
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Affiliation(s)
- Jeong-Hoon Kim
- Department of Energy Engineering, School of Energy and Chemical Engineering Ulsan National Institute of Science and Technology (UNIST) , Ulsan 689-798, Korea
| | - Gwan Yeong Jung
- Department of Energy Engineering, School of Energy and Chemical Engineering Ulsan National Institute of Science and Technology (UNIST) , Ulsan 689-798, Korea
| | - Yong-Hyeok Lee
- Department of Energy Engineering, School of Energy and Chemical Engineering Ulsan National Institute of Science and Technology (UNIST) , Ulsan 689-798, Korea
| | - Jung-Hwan Kim
- Department of Energy Engineering, School of Energy and Chemical Engineering Ulsan National Institute of Science and Technology (UNIST) , Ulsan 689-798, Korea
| | - Sun-Young Lee
- Department of Forest Products, Korea Forest Research Institute , Seoul 02455, Korea
| | - Sang Kyu Kwak
- Department of Energy Engineering, School of Energy and Chemical Engineering Ulsan National Institute of Science and Technology (UNIST) , Ulsan 689-798, Korea
| | - Sang-Young Lee
- Department of Energy Engineering, School of Energy and Chemical Engineering Ulsan National Institute of Science and Technology (UNIST) , Ulsan 689-798, Korea
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Yoo J, Cho SJ, Jung GY, Kim SH, Choi KH, Kim JH, Lee CK, Kwak SK, Lee SY. COF-Net on CNT-Net as a Molecularly Designed, Hierarchical Porous Chemical Trap for Polysulfides in Lithium-Sulfur Batteries. Nano Lett 2016; 16:3292-3300. [PMID: 27104986 DOI: 10.1021/acs.nanolett.6b00870] [Citation(s) in RCA: 96] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The hierarchical porous structure has garnered considerable attention as a multiscale engineering strategy to bring unforeseen synergistic effects in a vast variety of functional materials. Here, we demonstrate a "microporous covalent organic framework (COF) net on mesoporous carbon nanotube (CNT) net" hybrid architecture as a new class of molecularly designed, hierarchical porous chemical trap for lithium polysulfides (Li2Sx) in Li-S batteries. As a proof of concept for the hybrid architecture, self-standing COF-net on CNT-net interlayers (called "NN interlayers") are fabricated through CNT-templated in situ COF synthesis and then inserted between sulfur cathodes and separators. Two COFs with different micropore sizes (COF-1 (0.7 nm) and COF-5 (2.7 nm)) are chosen as model systems. The effects of the pore size and (boron-mediated) chemical affinity of microporous COF nets on Li2Sx adsorption phenomena are theoretically investigated through density functional theory calculations. Benefiting from the chemical/structural uniqueness, the NN interlayers effectively capture Li2Sx without impairing their ion/electron conduction. Notably, the COF-1 NN interlayer, driven by the well-designed microporous structure, allows for the selective deposition/dissolution (i.e., facile solid-liquid conversion) of electrically inert Li2S. As a consequence, the COF-1 NN interlayer provides a significant improvement in the electrochemical performance of Li-S cells (capacity retention after 300 cycles (at charge/discharge rate = 2.0 C/2.0 C) = 84% versus 15% for a control cell with no interlayer) that lies far beyond those accessible with conventional Li-S technologies.
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Affiliation(s)
| | | | | | | | | | | | - Chang Kee Lee
- Korea Packaging Center, Korea Institute of Industrial Technology , Ojeong-gu, Bucheon 14449, Korea
| | - Sang Kyu Kwak
- Center for Multidimensional Carbon Materials, Institute for Basic Science (IBS) , Ulsan 44919, Korea
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Hyun SM, Lee JH, Jung GY, Kim YK, Kim TK, Jeoung S, Kwak SK, Moon D, Moon HR. Exploration of Gate-Opening and Breathing Phenomena in a Tailored Flexible Metal–Organic Framework. Inorg Chem 2016; 55:1920-5. [DOI: 10.1021/acs.inorgchem.5b02874] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | | | | | | | - Dohyun Moon
- Beamline
Division, Pohang Accelerator Laboratory, 80 Jigokro-127-beongil, Nam-gu Pohang, Gyungbuk 37673, Republic of Korea
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Seo B, Jung GY, Sa YJ, Jeong HY, Cheon JY, Lee JH, Kim HY, Kim JC, Shin HS, Kwak SK, Joo SH. Monolayer-precision synthesis of molybdenum sulfide nanoparticles and their nanoscale size effects in the hydrogen evolution reaction. ACS Nano 2015; 9:3728-39. [PMID: 25794552 DOI: 10.1021/acsnano.5b00786] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Metal sulfide-based nanostructured materials have emerged as promising catalysts for hydrogen evolution reaction (HER), and significant progress has been achieved in enhancing their activity and durability for the HER. The understanding of nanoscale size-dependent catalytic activities can suggest critical information regarding catalytic reactivity, providing the scientific basis for the design of advanced catalysts. However, nanoscale size effects in metal sulfide-based HER catalysts have not yet been established fully, due to the synthetic difficulty in precisely size-controlled metal sulfide nanoparticles. Here we report the preparation of molybdenum sulfide (MoS2) nanoparticles with monolayer precision from one to four layers with the nearly constant basal plane size of 5 nm, and their size-dependent catalytic activity in the HER. Using density functional theory (DFT) calculations, we identified the most favorable single-, double-, and triple-layer MoS2 model structures for the HER, and calculated elementary step energetics of the HER over these three model structures. Combining HER activity measurements and the DFT calculation results, we establish that the turnover frequency of MoS2 nanoparticles in the HER increases in a quasi-linear manner with decreased layer numbers. Cobalt-promoted MoS2 nanoparticles also exhibited similar HER activity trend. We attribute the higher HER activity of smaller metal sulfide nanoparticles to the higher degree of oxidation, higher Mo-S coordination number, formation of the 1T phase, and lower activation energy required to overcome transition state. This insight into the nanoscale size-dependent HER activity trend will facilitate the design of advanced HER catalysts as well as other hydrotreating catalysts.
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Affiliation(s)
- Bora Seo
- †Department of Chemistry, ‡School of Energy and Chemical Engineering, and §UNIST Central Research Facilities (UCRF), Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 689-798, Republic of Korea
| | - Gwan Yeong Jung
- †Department of Chemistry, ‡School of Energy and Chemical Engineering, and §UNIST Central Research Facilities (UCRF), Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 689-798, Republic of Korea
| | - Young Jin Sa
- †Department of Chemistry, ‡School of Energy and Chemical Engineering, and §UNIST Central Research Facilities (UCRF), Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 689-798, Republic of Korea
| | - Hu Young Jeong
- †Department of Chemistry, ‡School of Energy and Chemical Engineering, and §UNIST Central Research Facilities (UCRF), Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 689-798, Republic of Korea
| | - Jae Yeong Cheon
- †Department of Chemistry, ‡School of Energy and Chemical Engineering, and §UNIST Central Research Facilities (UCRF), Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 689-798, Republic of Korea
| | - Jeong Hyeon Lee
- †Department of Chemistry, ‡School of Energy and Chemical Engineering, and §UNIST Central Research Facilities (UCRF), Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 689-798, Republic of Korea
| | - Ho Young Kim
- †Department of Chemistry, ‡School of Energy and Chemical Engineering, and §UNIST Central Research Facilities (UCRF), Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 689-798, Republic of Korea
| | - Jin Chul Kim
- †Department of Chemistry, ‡School of Energy and Chemical Engineering, and §UNIST Central Research Facilities (UCRF), Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 689-798, Republic of Korea
| | - Hyeon Suk Shin
- †Department of Chemistry, ‡School of Energy and Chemical Engineering, and §UNIST Central Research Facilities (UCRF), Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 689-798, Republic of Korea
| | - Sang Kyu Kwak
- †Department of Chemistry, ‡School of Energy and Chemical Engineering, and §UNIST Central Research Facilities (UCRF), Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 689-798, Republic of Korea
| | - Sang Hoon Joo
- †Department of Chemistry, ‡School of Energy and Chemical Engineering, and §UNIST Central Research Facilities (UCRF), Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan 689-798, Republic of Korea
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28
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Lee MY, Kim HJ, Jung GY, Han AR, Kwak SK, Kim BJ, Oh JH. Highly sensitive and selective liquid-phase sensors based on a solvent-resistant organic-transistor platform. Adv Mater 2015; 27:1540-1546. [PMID: 25640109 DOI: 10.1002/adma.201404707] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2014] [Revised: 11/10/2014] [Indexed: 06/04/2023]
Abstract
Liquid-phase sensing of various organic solvents is performed for the first time, using a solvent-resistant organic-transistor platform. Sensors composed of a cross-linked poly(3-hexylthiophene) (P3HT)-azide co-polymer and a calixarene derivative exhibit highly sensitive and selective sensing behavior, owing to the selective binding effects of the liquid analytes with the calixarene-functionalized P3HT-azide, extending the range of their use in practical applications.
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Affiliation(s)
- Moo Yeol Lee
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang, Gyeongbuk, 790-784, Korea
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Jang HS, Kim JH, Kim KS, Jung GY, Lee JJ, Kim GH. Improvement of transmittance by fabricating broadband subwavelength anti-reflection structures for polycarbonate. J Nanosci Nanotechnol 2011; 11:291-295. [PMID: 21446442 DOI: 10.1166/jnn.2011.3280] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We report on how to increase transmittance of a 0.2 mm thick polycarbonate (PC) film by periodic subwavelength anti-reflection structures in the visible spectral range. Subwavelength anti-reflection structures like moth-eyes are fabricated into the polycarbonate substrate itself by thermal nano-imprinting lithography (TH-NIL), which uses silicon stamps that have periodic structures such as gratings (lines and spaces) and pillared dots, and are fabricated by laser interference lithography (LIL) and transformer coupled plasma etching. To increase transmittance of a polycarbonate film, we control the periods and shapes of patterns, the number of patterned surfaces, and the overlapping direction of patterns that are fabricated into its surfaces. As a result of this, we show that average transmittance improves as the pattern period gets shorter and as both surfaces of the film are patterned. We also show that the spectrum range gets larger as the pattern period gets shorter and is determined by the longer pattern period in the case of designing a film to have different pattern period on its surfaces. The maximum average transmittance of a polycarbonate film increases up to approximately 6% compared to a bare sample in the 470-800 nm spectral range.
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Affiliation(s)
- H S Jang
- Division of Nano and Bio Technology, Daegu-Gyeongbuk Institute of Science and Technology, Dalseo-gu, Daegu 704-230, Korea
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Jung GY, Lee EY, Kim Y, Jung BW, Kang SH, Choi CY. Stabilization effect of zeolite on DHFR mRNA in a wheat germ cell-free protein synthesis system. J Biosci Bioeng 2000; 89:193-5. [PMID: 16232725 DOI: 10.1016/s1389-1723(00)88736-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/1999] [Accepted: 09/24/1999] [Indexed: 11/26/2022]
Abstract
The effects of zeolites and monocations on the protein synthesis in a cell-free system derived from wheat germ were investigated. M type of synthetic zeolite markedly enhanced the translation efficiency. Whereas this kind of stimulatory effect of zeolite in an Escherichia coli cell-free system resulted from a change in the salt compositions of the reaction solution with the addition of zeolite, the enhancement of protein synthesis in a wheat germ cell-free system was not due to the ion exchange reaction of zeolites. From the results of mRNA stability analysis, it was found that zeolite could stabilize the mRNA in a wheat germ cell-free protein synthesis system. The stabilization of mRNA by the simple addition of zeolites is useful for the enhancement of protein synthesis in a wheat germ cell-free system, since conventional methods to improve mRNA stability, such as the addition of nuclease inhibitor, have not been effective for a wheat germ cell-free system.
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Affiliation(s)
- G Y Jung
- School of Chemical Engineering, College of Engineering, Seoul National University, Seoul 151-742, Korea
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Abstract
Expression of dihydrofolate reductase (DHFR) and chloramphenicol acetyltransferase (CAT) mRNAs in cell-free Escherichia coli translation systems is greatly enhanced as a result of their insertion into RQ135 RNA, a naturally occurring satellite of phage Q beta. The enhancement is due to protection of the recombinant mRNAs against endogenous ribonucleases and to an increased initial rate of translation in the case of the RQ-CAT mRNA.
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Affiliation(s)
- V I Ugarov
- Institute of Protein Research, Russian Academy of Sciences, Puschino, Moscow Region
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