Fingerprints of the Strong Interaction between Monolayer MoS2 and Gold
Matej Velicky, Alvaro Rodriguez, Milan Bousa, Andrey V. Krayev, Martin Vondracek, Jan Honolka, Mahdi Ahmadi, Gavin E. Donnelly, Fumin Huang, Hector D. Abruna, K… 展开作者
Matej Velicky, Alvaro Rodriguez, Milan Bousa, Andrey V. Krayev, Martin Vondracek, Jan Honolka, Mahdi Ahmadi, Gavin E. Donnelly, Fumin Huang, Hector D. Abruna, Kostya S. Novoselov, Otakar Frank
Gold-mediated exfoliation of MoS2 has attracted considerable interest in the recent years. A strong interaction between MoS2 and Au facilitates preferential production of centimeter-sized monolayer MoS2 with near-unity yield and provides a heterostructure system noteworthy from a fundamental standpoint. However, little is known about the detailed nature of the MoS2-Au interaction and its evolution with the MoS2 thickness. Here, we identify specific vibrational and binding energy fingerprints of such strong interaction using Raman and X-ray photoelectron spectroscopy, which indicate substantial strain and charge-transfer in monolayer MoS2. Near-field tip-enhanced Raman spectroscopy reveals heterogeneity of the MoS2-Au interaction at the nanoscale, reflecting the spatial non-conformity between the two materials. Far-field micro-Raman spectroscopy shows that this interaction is strongly affected by the roughness and cleanliness of the underlying Au. Our results elucidate the nature of the strong MoS2-Au interaction and provide guidance for strain and charge doping engineering of MoS2.
Real-Space Plasmon Imaging Reveals Modified Electronic Structure of Gold at the Monolayer Limit
CIC nanoGUNE BRTA；Chalmers University of Technology（查尔姆斯理工大学）；Linköping University（林雪平大学）；Max Planck Institute for Solid State Research（马克斯·普朗克固体研究所）；MAX IV Laboratory, Lund University（隆德大学 MAX IV 实验室）；Donostia International Physics Center（圣塞巴斯蒂安国际物理中心）；IKERBASQUE, Basque Foundation for Science（伊卡巴斯基克，巴斯克科学基金会）；Facultad de Ciencias Químicas, Universidad del País Vasco UPV-EHU（巴斯克国立大学 UPV-EHU 理学院化学系）；Department of Electricity and Electronics, University of the Basque Country (UPV/EHU)（巴斯克国立大学 (UPV/EHU) 电力与电子工程系）
Emergent gold-induced interfacial magnetism in monolayer FePS$_3$
European Synchrotron Radiation Facility（欧洲同步辐射装置）；Université Grenoble Alpes, CNRS, Grenoble INP, Institut NEEL（格勒诺布尔阿尔卑斯大学、法国国家科学研究中心、格勒诺布尔理工学院、NEEL研究所）；Department of Physics Giuseppe Occhialini, University of Milano-Bicocca（米兰比可卡大学朱塞佩·奥基亚利尼物理系）；Université Grenoble Alpes, CEA, IRIG, MEM（格勒诺布尔阿尔卑斯大学、法国原子能和替代能源委员会、研究与信息技术部、材料与物理化学实验室）
Ultrastrong Au-Te bonding drives disorder in monolayer ZrTe$_5$ on gold
Hungarian Research Network, HUN-REN Centre for Energy Research, Institute of Technical Physics and Materials Science（匈牙利研究网络，HUN-REN能源研究中心，技术物理与材料科学研究所）；MTA - HUN-REN EK Lendület “Momentum” Topology in Nanomaterials Research Group（MTA-HUN-REN EK Lendulet“动量”纳米材料拓扑研究组）；Budapest University of Technology and Economics（布达佩斯技术与经济大学）；ELTE Eötvös Loránd University（罗兰大学）
Molecular stochastic process on gold surface observed in broadband-infrared, background-suppressed, sum frequency generation spectroscopy: picosecond heat transfer to self-assembled monolayers
Strain, doping and electronic transport of large area monolayer MoS2 exfoliated on gold and transferred to an insulating substrate
金辅助的机械剥离目前代表了一种有前途的方法，从母体范德华（vdW）晶体中分离具有优异的电子和光学性质的超大（cm级）过渡金属二硫属化物（TMD）单层（1 L）。$Au$和硫族元素原子之间的强相互作用是实现这种近乎完美的1 L剥离产率的关键。另一方面，它可能会显着影响与Au接触的1 L TMD的掺杂和应变。在本文中，我们系统地研究了形态，应变，掺杂，和电性能的大面积1 L $MoS_{2}$剥离超平坦的$Au$薄膜（$0.16-0.21 nm$粗糙度），并最终转移到绝缘$Al_{2}O_{3}$衬底。对$E'$和$A1'$峰位置的拉曼映射和相关分析揭示了与$Au$接触的1 L $MoS_{2}$的适度拉伸应变（$0.2\%$）和p型掺杂（$n=-0.25 \times 10^{13} cm^{-2}$）。纳米级分辨率的电流映射和电流-电压（I-V）测量导电原子力显微镜（C-AFM）显示直接隧穿在1 L的$MoS_{2}$上的$Au$，具有广泛的分布的隧穿势垒值（从0.7到1.7 eV）与p型掺杂的$MoS_{2}$一致。在$1L-MoS_{2}$最终转移到$Al_{2}O_{3}/Si$上后，应变转化为压缩应变（$-0.25\%$）。此外，n型掺杂（$n=0.5 \times 10^{13} cm^{-2}$）推断通过拉曼映射和确认的$Al_{2}O_{3}/Si$背栅1 L $Mo…
A Wide Optical-Gap in Fully $sp^3$-Like Hydrogenated Monolayer Graphene
Università degli Studi di Roma Tre（罗马第三大学）；INFN Sezione di Roma Tre（意大利国家核物理研究所罗马三分部）；Graphene Labs, Istituto italiano di tecnologia（意大利理工大学石墨烯实验室）；Sapienza Università di Roma（罗马智慧大学）
Chiral Porphyrin Monolayers on Ferromagnetic Thin Films: Ultrafast Spectroscopy of Hybrid Interfaces
Faculty of Chemistry, Adam Mickiewicz University（亚当·密茨凯维奇大学化学系）；Center for Advanced Technologies, Adam Mickiewicz University（亚当·密茨凯维奇大学先进技术中心）；Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research（德累斯顿-罗斯多夫亥姆霍兹中心离子束物理与材料研究所）；Faculty of Physics and Astronomy, Adam Mickiewicz University（亚当·密茨凯维奇大学物理与天文学系）
Kagome Topology in Two-Dimensional Noble-Metal Monolayers
Institute of Physics and International Center of Physics, University of Brasília（巴西利亚大学物理研究所和国际物理中心）；Computational Materials Laboratory, LCCMat, Institute of Physics, University of Brasília（巴西利亚大学物理学院计算材料实验室）；Modeling and Molecular Simulation Group, São Paulo State University (UNESP), School of Sciences（圣保罗州立大学理学院建模与分子模拟小组）；Department of Applied Physics and Center for Computational Engineering and Sciences, State University of Campinas（坎皮纳斯州立大学应用物理系和计算工程科学中心）
Intermolecular interactions and substrate effects for an adamantane monolayer on the Au(111) surface
本文从理论和实验上研究了金刚烷在Au（111）表面单层膜的红外光谱。使用一种新的基于STM的红外光谱技术（IRSTM），我们能够测量Au（111）上金刚烷单层的纳米级结构及其红外光谱，而基于DFT的从头计算使我们能够解释我们的测量所揭示的微观振动动力学。我们发现金刚烷在Au（111）上的单层膜的红外光谱相对于气相红外光谱有很大的改变。第一种改性是由于单层堆积引起的金刚烷-金刚烷相互作用引起的，它使2912 cm $^{-1}$峰（气相）的IR强度降低了3.5倍。第二种改性源自金刚烷-金相互作用，它使2938 cm $^{-1}$峰（气相）的IR强度增加2.6倍，并使其频率降低276 cm $^{-1}$。我们期望，这里描述的技术可以用于独立估计的基板效应和分子间的相互作用，在其他类金刚石分子，并为其他金属基板。
