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Han SS, Thacharon A, Kim J, Chung K, Liu X, Jang W, Jetybayeva A, Hong S, Lee KH, Kim Y, Cho EJ, Kim SW. Boosted Heterogeneous Catalysis by Surface-Accumulated Excess Electrons of Non-Oxidized Bare Copper Nanoparticles on Electride Support. Adv Sci (Weinh) 2023; 10:e2204248. [PMID: 36394076 PMCID: PMC9839873 DOI: 10.1002/advs.202204248] [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: 07/26/2022] [Revised: 10/18/2022] [Indexed: 06/16/2023]
Abstract
Engineering active sites of metal nanoparticle-based heterogeneous catalysts is one of the most prerequisite approaches for the efficient production of chemicals, but the limited active sites and undesired oxidation on the metal nanoparticles still remain as key challenges. Here, it is reported that the negatively charged surface of copper nanoparticles on the 2D [Ca2 N]+ ∙e- electride provides the unrestricted active sites for catalytic selective sulfenylation of indoles and azaindoles with diaryl disulfides. Substantial electron transfer from the electride support to copper nanoparticles via electronic metal-support interactions results in the accumulation of excess electrons at the surface of copper nanoparticles. Moreover, the surface-accumulated excess electrons prohibit the oxidation of copper nanoparticle, thereby maintaining the metallic surface in a negatively charged state and activating both (aza)indoles and disulfides under mild conditions in the absence of any further additives. This study defines the role of excess electrons on the nanoparticle-based heterogeneous catalyst that can be rationalized in versatile systems.
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Affiliation(s)
- Sung Su Han
- Department of ChemistryChung‐Ang UniversitySeoul06974Republic of Korea
| | - Athira Thacharon
- Department of Energy ScienceSungkyunkwan University (SKKU)Suwon16419Republic of Korea
| | - Jun Kim
- Department of ChemistryChung‐Ang UniversitySeoul06974Republic of Korea
| | - Kyungwha Chung
- Department of Energy ScienceSungkyunkwan University (SKKU)Suwon16419Republic of Korea
| | - Xinghui Liu
- Department of Energy ScienceSungkyunkwan University (SKKU)Suwon16419Republic of Korea
| | - Woo‐Sung Jang
- Department of Energy ScienceSungkyunkwan University (SKKU)Suwon16419Republic of Korea
| | - Albina Jetybayeva
- Department of Materials Science and EngineeringKAISTDaejeon34141Republic of Korea
| | - Seungbum Hong
- Department of Materials Science and EngineeringKAISTDaejeon34141Republic of Korea
| | - Kyu Hyoung Lee
- Department of Materials Science and EngineeringYonsei UniversitySeoul03722Republic of Korea
| | - Young‐Min Kim
- Department of Energy ScienceSungkyunkwan University (SKKU)Suwon16419Republic of Korea
| | - Eun Jin Cho
- Department of ChemistryChung‐Ang UniversitySeoul06974Republic of Korea
| | - Sung Wng Kim
- Department of Energy ScienceSungkyunkwan University (SKKU)Suwon16419Republic of Korea
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Chung K, Bang J, Thacharon A, Song HY, Kang SH, Jang WS, Dhull N, Thapa D, Ajmal CM, Song B, Lee SG, Wang Z, Jetybayeva A, Hong S, Lee KH, Cho EJ, Baik S, Oh SH, Kim YM, Lee YH, Kim SG, Kim SW. Non-oxidized bare copper nanoparticles with surface excess electrons in air. Nat Nanotechnol 2022; 17:285-291. [PMID: 35145286 PMCID: PMC8930766 DOI: 10.1038/s41565-021-01070-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [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: 06/22/2021] [Accepted: 12/23/2021] [Indexed: 06/14/2023]
Abstract
Copper (Cu) nanoparticles (NPs) have received extensive interest owing to their advantageous properties compared with their bulk counterparts. Although the natural oxidation of Cu NPs can be alleviated by passivating the surfaces with additional moieties, obtaining non-oxidized bare Cu NPs in air remains challenging. Here we report that bare Cu NPs with surface excess electrons retain their non-oxidized state over several months in ambient air. Cu NPs grown on an electride support with excellent electron transfer ability are encapsulated by the surface-accumulated excess electrons, exhibiting an ultralow work function of ~3.2 eV. Atomic-scale structural and chemical analyses confirm the absence of Cu oxide moiety at the outermost surface of air-exposed bare Cu NPs. Theoretical energetics clarify that the surface-accumulated excess electrons suppress the oxygen adsorption and consequently prohibit the infiltration of oxygen into the Cu lattice, provoking the endothermic reaction for oxidation process. Our results will further stimulate the practical use of metal NPs in versatile applications.
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Affiliation(s)
- Kyungwha Chung
- Department of Energy Science, Sungkyunkwan University, Suwon, Republic of Korea
| | - Joonho Bang
- Department of Energy Science, Sungkyunkwan University, Suwon, Republic of Korea
| | - Athira Thacharon
- Department of Energy Science, Sungkyunkwan University, Suwon, Republic of Korea
- Center for Integrated Nanostructure Physics, Institute for Basic Science, Suwon, Republic of Korea
| | - Hyun Yong Song
- Department of Energy Science, Sungkyunkwan University, Suwon, Republic of Korea
- Center for Integrated Nanostructure Physics, Institute for Basic Science, Suwon, Republic of Korea
| | - Se Hwang Kang
- Department of Energy Science, Sungkyunkwan University, Suwon, Republic of Korea
- Center for Integrated Nanostructure Physics, Institute for Basic Science, Suwon, Republic of Korea
- Research Institute of Industrial Science and Technology, Pohang, Republic of Korea
| | - Woo-Sung Jang
- Department of Energy Science, Sungkyunkwan University, Suwon, Republic of Korea
| | - Neha Dhull
- Department of Energy Science, Sungkyunkwan University, Suwon, Republic of Korea
- Center for Integrated Nanostructure Physics, Institute for Basic Science, Suwon, Republic of Korea
| | - Dinesh Thapa
- Department of Physics and Astronomy and Center for Computational Sciences, Mississippi State University, Mississippi State, MS, USA
| | - C Muhammed Ajmal
- School of Mechanical Engineering, Sungkyunkwan University, Suwon, Republic of Korea
| | - Bumsub Song
- Department of Energy Science, Sungkyunkwan University, Suwon, Republic of Korea
| | - Sung-Gyu Lee
- Department of Energy Science, Sungkyunkwan University, Suwon, Republic of Korea
- Center for Integrated Nanostructure Physics, Institute for Basic Science, Suwon, Republic of Korea
| | - Zhen Wang
- Department of Energy Science, Sungkyunkwan University, Suwon, Republic of Korea
- Center for Integrated Nanostructure Physics, Institute for Basic Science, Suwon, Republic of Korea
| | - Albina Jetybayeva
- Department of Materials Science and Engineering, KAIST, Daejeon, Republic of Korea
| | - Seungbum Hong
- Department of Materials Science and Engineering, KAIST, Daejeon, Republic of Korea
| | - Kyu Hyoung Lee
- Department of Materials Science and Engineering, Yonsei University, Seoul, Republic of Korea
| | - Eun Jin Cho
- Department of Chemistry, Chung-Ang University, Seoul, Republic of Korea
| | - Seunghyun Baik
- School of Mechanical Engineering, Sungkyunkwan University, Suwon, Republic of Korea
| | - Sang Ho Oh
- Department of Energy Science, Sungkyunkwan University, Suwon, Republic of Korea
- Center for Integrated Nanostructure Physics, Institute for Basic Science, Suwon, Republic of Korea
| | - Young-Min Kim
- Department of Energy Science, Sungkyunkwan University, Suwon, Republic of Korea
- Center for Integrated Nanostructure Physics, Institute for Basic Science, Suwon, Republic of Korea
| | - Young Hee Lee
- Department of Energy Science, Sungkyunkwan University, Suwon, Republic of Korea
- Center for Integrated Nanostructure Physics, Institute for Basic Science, Suwon, Republic of Korea
| | - Seong-Gon Kim
- Department of Physics and Astronomy and Center for Computational Sciences, Mississippi State University, Mississippi State, MS, USA.
| | - Sung Wng Kim
- Department of Energy Science, Sungkyunkwan University, Suwon, Republic of Korea.
- Center for Integrated Nanostructure Physics, Institute for Basic Science, Suwon, Republic of Korea.
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Hong S, Liow CH, Yuk JM, Byon HR, Yang Y, Cho E, Yeom J, Park G, Kang H, Kim S, Shim Y, Na M, Jeong C, Hwang G, Kim H, Kim H, Eom S, Cho S, Jun H, Lee Y, Baucour A, Bang K, Kim M, Yun S, Ryu J, Han Y, Jetybayeva A, Choi PP, Agar JC, Kalinin SV, Voorhees PW, Littlewood P, Lee HM. Reducing Time to Discovery: Materials and Molecular Modeling, Imaging, Informatics, and Integration. ACS Nano 2021; 15:3971-3995. [PMID: 33577296 DOI: 10.1021/acsnano.1c00211] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Multiscale and multimodal imaging of material structures and properties provides solid ground on which materials theory and design can flourish. Recently, KAIST announced 10 flagship research fields, which include KAIST Materials Revolution: Materials and Molecular Modeling, Imaging, Informatics and Integration (M3I3). The M3I3 initiative aims to reduce the time for the discovery, design and development of materials based on elucidating multiscale processing-structure-property relationship and materials hierarchy, which are to be quantified and understood through a combination of machine learning and scientific insights. In this review, we begin by introducing recent progress on related initiatives around the globe, such as the Materials Genome Initiative (U.S.), Materials Informatics (U.S.), the Materials Project (U.S.), the Open Quantum Materials Database (U.S.), Materials Research by Information Integration Initiative (Japan), Novel Materials Discovery (E.U.), the NOMAD repository (E.U.), Materials Scientific Data Sharing Network (China), Vom Materials Zur Innovation (Germany), and Creative Materials Discovery (Korea), and discuss the role of multiscale materials and molecular imaging combined with machine learning in realizing the vision of M3I3. Specifically, microscopies using photons, electrons, and physical probes will be revisited with a focus on the multiscale structural hierarchy, as well as structure-property relationships. Additionally, data mining from the literature combined with machine learning will be shown to be more efficient in finding the future direction of materials structures with improved properties than the classical approach. Examples of materials for applications in energy and information will be reviewed and discussed. A case study on the development of a Ni-Co-Mn cathode materials illustrates M3I3's approach to creating libraries of multiscale structure-property-processing relationships. We end with a future outlook toward recent developments in the field of M3I3.
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Affiliation(s)
- Seungbum Hong
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
- KAIST Institute for NanoCentury (KINC), Korea Advanced Institute of Science and Engineering (KAIST), Daejeon, 34141, Republic of Korea
| | - Chi Hao Liow
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - Jong Min Yuk
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - Hye Ryung Byon
- Department of Chemistry, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - Yongsoo Yang
- Department of Physics, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - EunAe Cho
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - Jiwon Yeom
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - Gun Park
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - Hyeonmuk Kang
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - Seunggu Kim
- Department of Chemistry, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - Yoonsu Shim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - Moony Na
- Department of Chemistry, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - Chaehwa Jeong
- Department of Physics, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - Gyuseong Hwang
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - Hongjun Kim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - Hoon Kim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - Seongmun Eom
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - Seongwoo Cho
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - Hosun Jun
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - Yongju Lee
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - Arthur Baucour
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - Kihoon Bang
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - Myungjoon Kim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - Seokjung Yun
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - Jeongjae Ryu
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - Youngjoon Han
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - Albina Jetybayeva
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - Pyuck-Pa Choi
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
| | - Joshua C Agar
- Department of Materials Science and Engineering, Lehigh University, Bethlehem, Pennsylvania 18015, United States
| | - Sergei V Kalinin
- Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Peter W Voorhees
- Department of Materials Science and Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Peter Littlewood
- James Franck Institute, University of Chicago, Chicago, Illinois 60637, United States
| | - Hyuck Mo Lee
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Engineering (KAIST), Daejeon 34141, Republic of Korea
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Li P, Oh C, Kim H, Chen-Glasser M, Park G, Jetybayeva A, Yeom J, Kim H, Ryu J, Hong S. Nanoscale effects of beverages on enamel surface of human teeth: An atomic force microscopy study. J Mech Behav Biomed Mater 2020; 110:103930. [PMID: 32957225 DOI: 10.1016/j.jmbbm.2020.103930] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 05/17/2020] [Accepted: 06/10/2020] [Indexed: 11/17/2022]
Abstract
Dental erosion has become a prevalence disease and attracted increasing attention worldwide. In this research, we quantitatively evaluate the mechanical and morphological changes in the very early stages of softening and weakening of human enamel surfaces induced by soft drinks using atomic force microscopy (AFM). With an increase of the immersion time in soft drinks, we found a significant increase of surface roughness (Rq) of the enamel surface. The prismatic structure of enamel was clearly observed after a 1-h immersion in Coca-Cola®, which shows its strong erosion effect. According to the elastic modulus mapping images obtained by AFM, a considerable decrease of elastic modulus (E) of enamel surface has been found as the enamel surface structures are etched away by soft drinks. A high surface roughness of enamel will result in a high chance of cavities due to easier bacterial adhesion on rougher surface, while a drastic deterioration of the mechanical properties of the enamel will weaken its protection property. Our findings show the serious influence of acidic drinks on enamel surface at the very beginning stage of etching process, which is quite meaningful for people to prevent dental erosion and keep dental health.
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Affiliation(s)
- Panpan Li
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Daejeon, 34141, Republic of Korea
| | - Chungik Oh
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Daejeon, 34141, Republic of Korea
| | - Hongjun Kim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Daejeon, 34141, Republic of Korea
| | - Melodie Chen-Glasser
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Daejeon, 34141, Republic of Korea
| | - Gun Park
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Daejeon, 34141, Republic of Korea
| | - Albina Jetybayeva
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Daejeon, 34141, Republic of Korea
| | - Jiwon Yeom
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Daejeon, 34141, Republic of Korea
| | - Hoon Kim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Daejeon, 34141, Republic of Korea
| | - Jeongjae Ryu
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Daejeon, 34141, Republic of Korea
| | - Seungbum Hong
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Daejeon, 34141, Republic of Korea; KAIST Institute for NanoCentury (KINC), Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Daejeon, 34141, Republic of Korea.
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Heeley E, El Aziz Y, Ellingford C, Jetybayeva A, Wan C, Crabb E, Taylor PG, Bassindale A. Self-assembly of fluoride-encapsulated polyhedral oligomeric silsesquioxane (POSS) nanocrystals. CrystEngComm 2019. [DOI: 10.1039/c8ce01750f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The self-assembly and crystal packing of a unique series of nanocrystalline fluoride ion-encapsulated polyhedral oligomeric silsesquioxane (F-POSS) compounds, with substituted electron-withdrawing group (EWG) perfluorinated alkyl chain arms of varying lengths, were investigated.
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Affiliation(s)
- Ellen Heeley
- Faculty of Science, Technology, Engineering and Mathematics
- Open University
- Milton Keynes
- UK
| | - Youssef El Aziz
- Faculty of Science, Technology, Engineering and Mathematics
- Open University
- Milton Keynes
- UK
| | - Christopher Ellingford
- International Institute of Nanocomposites Manufacturing (IINM)
- WMG
- University of Warwick
- UK
| | - Albina Jetybayeva
- Faculty of Science, Technology, Engineering and Mathematics
- Open University
- Milton Keynes
- UK
| | - Chaoying Wan
- International Institute of Nanocomposites Manufacturing (IINM)
- WMG
- University of Warwick
- UK
| | - Eleanor Crabb
- Faculty of Science, Technology, Engineering and Mathematics
- Open University
- Milton Keynes
- UK
| | - Peter G. Taylor
- Faculty of Science, Technology, Engineering and Mathematics
- Open University
- Milton Keynes
- UK
| | - Alan Bassindale
- Faculty of Science, Technology, Engineering and Mathematics
- Open University
- Milton Keynes
- UK
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