1
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Wang X, Kim K, Derby BK, McGuckin T, Calderón GA, Pettes MT, Hwang J, Kim Y, Park J, Chen A, Kang K, Yoo J. Structural alignment of ZnO columns across multiple monolayer MoS 2 layers as compliant substrates. NANOSCALE 2024; 16:11156-11162. [PMID: 38623744 DOI: 10.1039/d4nr00724g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/17/2024]
Abstract
Understanding the behavior of materials in multi-dimensional architectures composed of atomically thin two-dimensional (2D) materials and three-dimensional (3D) materials has become mandatory for progress in materials preparation via various epitaxy techniques, such as van der Waals and remote epitaxy methods. We investigated the growth behavior of ZnO on monolayer MoS2 as a model system to study the growth of a 3D material on a 2D material, which is beyond the scope of remote and van der Waals epitaxy. The study revealed column-to-column alignment and inversion of crystallinity, which can be explained by combinatorial epitaxy, grain alignment across an atomically sharp interface, and a compliant substrate. The growth study enabled the formation of a ZnO/MoS2 heterostructure with type-I band alignment. Our findings will have a scientific impact on realizing 2D/3D heterostructures for practical device applications.
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Affiliation(s)
- Xuejing Wang
- Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
| | - Kyungtae Kim
- Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
| | - Benjamin K Derby
- Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
| | | | - Gabriel A Calderón
- Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, USA
| | - Michael T Pettes
- Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
| | - Jinwoo Hwang
- Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, USA
| | - Yeonhoo Kim
- Interdisciplinary Materials Measurement Institute, Korea Research Institute of Standards and Science, Daejeon 34133, Republic of Korea
| | - Jeongwon Park
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Aiping Chen
- Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
| | - Kibum Kang
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Jinkyoung Yoo
- Center for Integrated Nanotechnologies, Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
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2
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Cui Y, Wang J, Li Y, Wu Y, Been E, Zhang Z, Zhou J, Zhang W, Hwang HY, Sinclair R, Cui Y. Twisted epitaxy of gold nanodisks grown between twisted substrate layers of molybdenum disulfide. Science 2024; 383:212-219. [PMID: 38207038 DOI: 10.1126/science.adk5947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 11/27/2023] [Indexed: 01/13/2024]
Abstract
We expand the concept of epitaxy to a regime of "twisted epitaxy" with the epilayer crystal orientation between two substrates influenced by their relative orientation. We annealed nanometer-thick gold (Au) nanoparticles between two substrates of exfoliated hexagonal molybdenum disulfide (MoS2) with varying orientation of their basal planes with a mutual twist angle ranging from 0° to 60°. Transmission electron microscopy studies show that Au aligns midway between the top and bottom MoS2 when the twist angle of the bilayer is small (<~7°). For larger twist angles, Au has only a small misorientation with the bottom MoS2 that varies approximately sinusoidally with twist angle of the bilayer MoS2. Four-dimensional scanning transmission electron microscopy analysis further reveals a periodic strain variation (<|±0.5%|) in the Au nanodisks associated with the twisted epitaxy, consistent with the Moiré registry of the two MoS2 twisted layers.
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Affiliation(s)
- Yi Cui
- Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA
| | - Jingyang Wang
- Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94305, USA
| | - Yanbin Li
- Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA
| | - Yecun Wu
- Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA
| | - Emily Been
- Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA
| | - Zewen Zhang
- Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA
| | - Jiawei Zhou
- Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA
| | - Wenbo Zhang
- Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA
| | - Harold Y Hwang
- Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA
- Department of Applied Physics, Stanford University, Stanford, CA 94305, USA
| | - Robert Sinclair
- Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA
| | - Yi Cui
- Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA
- Department of Energy Science and Engineering, Stanford University, Stanford, CA 94305, USA
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3
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Chen JW, Wei YG, Lo HY, Lu S, Chen YC, Lei CF, Liu PL, Yu P, Tsou NT, Yasuhara A, Wu WW, Chu YH. Mechanically Robust Interface at Metal/Muscovite Quasi van der Waals Epitaxy. ACS APPLIED MATERIALS & INTERFACES 2023; 15:47715-47724. [PMID: 37769228 DOI: 10.1021/acsami.3c09129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/30/2023]
Abstract
Quasi van der Waals epitaxy is an approach to constructing the combination of 2D and 3D materials. Here, we quantify and discuss the 2D/3D interface structure and the corresponding features in metal/muscovite systems. High-resolution scanning transmission electron microscopy reveals the atomic arrangement at the interface. The theoretical results explain the formation mechanism and predict the mechanical robustness of these metal/muscovite quasi van der Waals epitaxies. The evidence of superior interface quality is delivered according to the outstanding performance of the designed systems in both retention (>105 s) and cycling tests (>105 cycles) through electromechanical measurements. With high-temperature X-ray reciprocal space mapping, the unique anisotropy of thermal expansion is discovered and predicted to sustain the thermal stress with a sizable thermal actuation. A maximum bending curvature of 264 m-1 at 243 °C can be obtained in the silver/muscovite heteroepitaxy. The electrothermal and photothermal methods show a fast response to thermal stress and demonstrate the interface robustness.
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Affiliation(s)
- Jia-Wei Chen
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
| | - Yun-Guan Wei
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
| | - Hung-Yang Lo
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
| | - SiCheng Lu
- State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing 100084, China
| | - Yi-Che Chen
- Graduate Institute of Precision Engineering, National Chung Hsing University, Taichung 402, Taiwan
| | - Chi-Fong Lei
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
| | - Po-Liang Liu
- Graduate Institute of Precision Engineering, National Chung Hsing University, Taichung 402, Taiwan
- Innovation and Development Center of Sustainable Agriculture, National Chung Hsing University, Taichung 402, Taiwan
| | - Pu Yu
- State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University, Beijing 100084, China
| | - Nien-Ti Tsou
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
| | - Akira Yasuhara
- EM Application Department of EM Business Unit, JEOL Ltd., 3-1-2 Musashino, Akishima, Tokyo 196-8558, Japan
| | - Wen-Wei Wu
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
| | - Ying-Hao Chu
- Department of Materials Science and Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
- Institute of Physics, Academia Sinica, Taipei 115, Taiwan
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4
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Lee G, Jang S, Kim YB, Cho D, Jeong D, Chae S, Myoung JM, Kim H, Kim SK, Lee JO. Ultrathin Metal Film on Graphene for Percolation-Threshold-Limited Thermal Emissivity Control. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2301227. [PMID: 37200230 DOI: 10.1002/adma.202301227] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 05/12/2023] [Indexed: 05/20/2023]
Abstract
Translucent Au/graphene hybrid films are shown to be effective in reducing thermal emission from the underlying surfaces when the deposition thickness of Au is close to the percolation threshold. The critical Au deposition thickness for an abrupt change in emissivity is reduced from 15 nm (Si substrate) to a percolation-threshold-limited thickness of 8.5 nm (graphene/Si substrate) because of the chemical inertness of graphene leading to the deposited Au atoms forming a thin, crystalline layer. The effect of the graphene layer on the optical properties of the hybrid film is highlighted by a drastic increase in infrared absorptivity, whereas the visible absorptivity is marginally affected by the presence of a graphene layer. The level of thermal emission from the Au/graphene hybrid films with the percolation-threshold-limited Au thickness is stable even with high background temperatures of up to 300 °C and mechanical strains of ≈4%. As an example of a thermal management application, an anti-counterfeiting device is demonstrated; thermal-camouflage-masked text fabricated with an Au/graphene hybrid film is discernible only using a thermographic camera. Ultrathin metal film assisted by a graphene layer will provide a facile platform for thermal management with semi-transparency, flexibility, and transferability to arbitrary surfaces.
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Affiliation(s)
- Geonhee Lee
- Advanced Materials Division, Korea Research Institute of Chemical Technology, Gajeong-ro 141, Daejeon, 34114, Republic of Korea
| | - Sojeong Jang
- Advanced Materials Division, Korea Research Institute of Chemical Technology, Gajeong-ro 141, Daejeon, 34114, Republic of Korea
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Young-Bin Kim
- Department of Applied Physics, Kyung Hee University, 1732 Deogyeong-daero, Yongin-si, Gyeonggi-do, 17104, Republic of Korea
| | - Donghwi Cho
- Advanced Materials Division, Korea Research Institute of Chemical Technology, Gajeong-ro 141, Daejeon, 34114, Republic of Korea
| | - Duwon Jeong
- Department of Physics, Sungkyunkwan University (SKKU), Suwon-si, Gyeonggi-do, 16419, Republic of Korea
| | - Soosang Chae
- Advanced Materials Division, Korea Research Institute of Chemical Technology, Gajeong-ro 141, Daejeon, 34114, Republic of Korea
| | - Jae-Min Myoung
- Department of Materials Science and Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea
| | - Hyunwoo Kim
- Drug Discovery Platform Research Center, Korea Research Institute of Chemical Technology (KRICT), Daejeon, 34114, Republic of Korea
| | - Sun-Kyung Kim
- Department of Applied Physics, Kyung Hee University, 1732 Deogyeong-daero, Yongin-si, Gyeonggi-do, 17104, Republic of Korea
| | - Jeong-O Lee
- Advanced Materials Division, Korea Research Institute of Chemical Technology, Gajeong-ro 141, Daejeon, 34114, Republic of Korea
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5
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Lung QND, Chu RJ, Kim Y, Laryn T, Madarang MA, Kovalchuk O, Song YW, Lee IH, Choi C, Choi WJ, Jung D. Graphene/III-V Quantum Dot Mixed-Dimensional Heterostructure for Enhanced Radiative Recombinations via Hole Carrier Transfer. NANO LETTERS 2023; 23:3344-3351. [PMID: 37027572 DOI: 10.1021/acs.nanolett.3c00321] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Fabrication of high quantum efficiency nanoscale device is challenging due to increased carrier loss at surface. Low dimensional materials such 0D quantum dots and 2D materials have been widely studied to mitigate the loss. Here, we demonstrate a strong photoluminescence enhancement from graphene/III-V quantum dot mixed-dimensional heterostructures. The distance between graphene and quantum dots in the 2D/0D hybrid structure determines the degree of radiative carrier recombination enhancement from 80% to 800% compared to the quantum dot only structure. Time-resolved photoluminescence decay also shows increased carrier lifetimes when the distance decreases from 50 to 10 nm. We propose that the optical enhancement is due to energy band bending and hole carrier transfer, which repair the imbalance of electron and hole carrier densities in quantum dots. This 2D graphene/0D quantum dot heterostructure shows promise for high performance nanoscale optoelectronic devices.
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Affiliation(s)
- Quang Nhat Dang Lung
- Center for Opto-electronic Materials and Devices, Korea Institute of Science and Technology, Seoul 02792, South Korea
- Division of Nanoscience and Technology, KIST School at University of Science and Technology, Seoul 02792, South Korea
| | - Rafael Jumar Chu
- Center for Opto-electronic Materials and Devices, Korea Institute of Science and Technology, Seoul 02792, South Korea
- Division of Nanoscience and Technology, KIST School at University of Science and Technology, Seoul 02792, South Korea
| | - Yeonhwa Kim
- Center for Opto-electronic Materials and Devices, Korea Institute of Science and Technology, Seoul 02792, South Korea
- Department of Materials Science and Engineering, Korea University, Seoul 02841, South Korea
| | - Tsimafei Laryn
- Center for Opto-electronic Materials and Devices, Korea Institute of Science and Technology, Seoul 02792, South Korea
- Division of Nanoscience and Technology, KIST School at University of Science and Technology, Seoul 02792, South Korea
| | - May Angelu Madarang
- Center for Opto-electronic Materials and Devices, Korea Institute of Science and Technology, Seoul 02792, South Korea
- Division of Nanoscience and Technology, KIST School at University of Science and Technology, Seoul 02792, South Korea
| | - Oleksiy Kovalchuk
- Center for Opto-electronic Materials and Devices, Korea Institute of Science and Technology, Seoul 02792, South Korea
| | - Yong-Won Song
- Center for Opto-electronic Materials and Devices, Korea Institute of Science and Technology, Seoul 02792, South Korea
| | - In-Ho Lee
- Center for Opto-electronic Materials and Devices, Korea Institute of Science and Technology, Seoul 02792, South Korea
| | - Changsoon Choi
- Center for Opto-electronic Materials and Devices, Korea Institute of Science and Technology, Seoul 02792, South Korea
| | - Won Jun Choi
- Center for Opto-electronic Materials and Devices, Korea Institute of Science and Technology, Seoul 02792, South Korea
| | - Daehwan Jung
- Center for Opto-electronic Materials and Devices, Korea Institute of Science and Technology, Seoul 02792, South Korea
- Division of Nanoscience and Technology, KIST School at University of Science and Technology, Seoul 02792, South Korea
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6
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Pincelli T, Vasileiadis T, Dong S, Beaulieu S, Dendzik M, Zahn D, Lee SE, Seiler H, Qi Y, Xian RP, Maklar J, Coy E, Mueller NS, Okamura Y, Reich S, Wolf M, Rettig L, Ernstorfer R. Observation of Multi-Directional Energy Transfer in a Hybrid Plasmonic-Excitonic Nanostructure. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2209100. [PMID: 36482148 DOI: 10.1002/adma.202209100] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 11/29/2022] [Indexed: 06/17/2023]
Abstract
Hybrid plasmonic devices involve a nanostructured metal supporting localized surface plasmons to amplify light-matter interaction, and a non-plasmonic material to functionalize charge excitations. Application-relevant epitaxial heterostructures, however, give rise to ballistic ultrafast dynamics that challenge the conventional semiclassical understanding of unidirectional nanometal-to-substrate energy transfer. Epitaxial Au nanoislands are studied on WSe2 with time- and angle-resolved photoemission spectroscopy and femtosecond electron diffraction: this combination of techniques resolves material, energy, and momentum of charge-carriers and phonons excited in the heterostructure. A strong non-linear plasmon-exciton interaction that transfers the energy of sub-bandgap photons very efficiently to the semiconductor is observed, leaving the metal cold until non-radiative exciton recombination heats the nanoparticles on hundreds of femtoseconds timescales. The results resolve a multi-directional energy exchange on timescales shorter than the electronic thermalization of the nanometal. Electron-phonon coupling and diffusive charge-transfer determine the subsequent energy flow. This complex dynamics opens perspectives for optoelectronic and photocatalytic applications, while providing a constraining experimental testbed for state-of-the-art modelling.
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Affiliation(s)
- Tommaso Pincelli
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Thomas Vasileiadis
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
- Faculty of Physics, Adam Mickiewicz University, Uniwersytetu Poznanskiego 2, Poznan, 61-614, Poland
| | - Shuo Dong
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
| | - Samuel Beaulieu
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
- Université de Bordeaux - CNRS - CEA, CELIA, UMR5107, Talence, F33405, France
| | - Maciej Dendzik
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
- Department of Applied Physics, KTH Royal Institute of Technology, Hannes Alfvéns väg 12, Stockholm, 114 19, Sweden
| | - Daniela Zahn
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
| | - Sang-Eun Lee
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
| | - Hélène Seiler
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
- Freie Universität Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Yingpeng Qi
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
- Center for Ultrafast Science and Technology, School of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - R Patrick Xian
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
- Department of Statistical Sciences, University of Toronto, 700 University Avenue, Toronto, M5G 1Z5, Canada
| | - Julian Maklar
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
| | - Emerson Coy
- NanoBioMedical Centre, Adam Mickiewicz University, ul. Wszechnicy Piastowskiej 3, Poznań, PL 61614, Poland
| | - Niclas S Mueller
- Freie Universität Berlin, Arnimallee 14, 14195, Berlin, Germany
- NanoPhotonics Centre, Cavendish Laboratory, Department of Physics, University of Cambridge, JJ Thomson Avenue, Cambridge, CB30HE, UK
| | - Yu Okamura
- Freie Universität Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Stephanie Reich
- Freie Universität Berlin, Arnimallee 14, 14195, Berlin, Germany
| | - Martin Wolf
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
| | - Laurenz Rettig
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
| | - Ralph Ernstorfer
- Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195, Berlin, Germany
- Institut für Optik und Atomare Physik, Technische Universität Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
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7
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Reidy K, Majchrzak PE, Haas B, Thomsen JD, Konečná A, Park E, Klein J, Jones AJH, Volckaert K, Biswas D, Watson MD, Cacho C, Narang P, Koch CT, Ulstrup S, Ross FM, Idrobo JC. Direct Visualization of Subnanometer Variations in the Excitonic Spectra of 2D/3D Semiconductor/Metal Heterostructures. NANO LETTERS 2023; 23:1068-1076. [PMID: 36637381 DOI: 10.1021/acs.nanolett.2c04749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The integration of metallic contacts with two-dimensional (2D) semiconductors is routinely required for the fabrication of nanoscale devices. However, nanometer-scale variations in the 2D/metal interface can drastically alter the local optoelectronic properties. Here, we map local excitonic changes of the 2D semiconductor MoS2 in contact with Au. We utilize a suspended and epitaxially grown 2D/metal platform that allows correlated electron energy-loss spectroscopy (EELS) and angle resolved photoelectron spectroscopy (nanoARPES) mapping. Spatial localization of MoS2 excitons uncovers an additional EELS peak related to the MoS2/Au interface. NanoARPES measurements indicate that Au-S hybridization decreases substantially with distance from the 2D/metal interface, suggesting that the observed EELS peak arises due to dielectric screening of the excitonic Coulomb interaction. Our results suggest that increasing the van der Waals distance could optimize excitonic spectra of mixed-dimensional 2D/3D interfaces and highlight opportunities for Coulomb engineering of exciton energies by the local dielectric environment or moiré engineering.
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Affiliation(s)
- Kate Reidy
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | | | - Benedikt Haas
- Department of Physics & IRIS Adlershof, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
| | - Joachim Dahl Thomsen
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Andrea Konečná
- Central European Institute of Technology, Brno University of Technology, 61200 Brno, Czech Republic
| | - Eugene Park
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Julian Klein
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Alfred J H Jones
- Department of Physics and Astronomy, Aarhus University, 8000 Aarhus C, Denmark
| | - Klara Volckaert
- Department of Physics and Astronomy, Aarhus University, 8000 Aarhus C, Denmark
| | - Deepnarayan Biswas
- Department of Physics and Astronomy, Aarhus University, 8000 Aarhus C, Denmark
| | - Matthew D Watson
- Diamond Light Source, Harwell Campus, Didcot OX11 0DE, United Kingdom
| | - Cephise Cacho
- Diamond Light Source, Harwell Campus, Didcot OX11 0DE, United Kingdom
| | - Prineha Narang
- College of Letters and Science, Physical Sciences, UCLA, Los Angeles, California 90095, United States
| | - Christoph T Koch
- Department of Physics & IRIS Adlershof, Humboldt-Universität zu Berlin, 12489 Berlin, Germany
| | - Søren Ulstrup
- Department of Physics and Astronomy, Aarhus University, 8000 Aarhus C, Denmark
| | - Frances M Ross
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Juan Carlos Idrobo
- Materials Science and Engineering Department, University of Washington, Seattle, Washington 98195, United States
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8
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Lee Y, Chang Y, Ryu H, Kim JH, Watanabe K, Taniguchi T, Kim M, Lee GH. Quasi-van der Waals Epitaxial Recrystallization of a Gold Thin Film into Crystallographically Aligned Single Crystals. ACS APPLIED MATERIALS & INTERFACES 2023; 15:6092-6097. [PMID: 36577086 DOI: 10.1021/acsami.2c18514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Heterointerfaces between two-dimensional (2D) materials and bulk metals determine the electrical and optical properties of their heterostructures. Although deposition of various metals on 2D materials has been studied, there is still a lack of studies on the interaction at the van der Waals (vdW) heterointerface between 2D materials and metals. Here, we report quasi-van der Waals (qvdW) epitaxial recrystallization of a gold thin film into crystallographically aligned single crystals by encapsulation annealing of a gold thin film with hexagonal boron nitride (hBN). When a polycrystalline gold thin film passivated with hBN was annealed, it was recrystallized into single gold crystals with a planar shape and crystallographic alignment with hBN due to a strong interaction between the gold film and hBN at the heterointerface. This reflects that a weak vdW force at the heterointerface is sufficiently strong to induce epitaxial recrystallization. Using this method, we fabricated a gold nanocrystal array with the same crystalline orientation and smooth top surface. Our work demonstrates a new method for epitaxial recrystallization of bulk crystals and provides a deep understanding of the interaction at the vdW heterointerface of 2D materials and metals.
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Affiliation(s)
- Yuna Lee
- Materials Science and Engineering, Seoul National University, Seoul 08826, Korea
| | - Yunyeong Chang
- Materials Science and Engineering, Seoul National University, Seoul 08826, Korea
| | - Huije Ryu
- Materials Science and Engineering, Seoul National University, Seoul 08826, Korea
| | - Jong Hun Kim
- Materials Science and Engineering, Seoul National University, Seoul 08826, Korea
| | - Kenji Watanabe
- Research Center for Functional Materials, National Institute of Materials Science, Tsukuba, Ibaraki 305-0044, Japan
| | - Takashi Taniguchi
- International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba, Ibaraki 305-0044, Japan
| | - Miyoung Kim
- Materials Science and Engineering, Seoul National University, Seoul 08826, Korea
| | - Gwan-Hyoung Lee
- Materials Science and Engineering, Seoul National University, Seoul 08826, Korea
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