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Intrinsically patterned corrals in monolayer Ag_(5)Se_(2) and selective molecular co-adsorption

Nano Research 2022年第7期15卷 6730-6735页

作者： Jianchen Lu Shiru Song Shuai Zhang Yang Song Yun Cao Zhenyu Wang Li Huang Hongliang Lu Yu-Yang Zhang Sokrates T.Pantelides Shixuan Du Xiao Lin Hong-Jun Gao Institute of Physics&University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing 100190China Department of Physics and Astronomy and Department of Electrical Engineering and Computer Science Vanderbilt UniversityNashvilleTN 37235USA CAS Center for Excellence in Topological Quantum Computation Chinese Academy of SciencesBeijing 100190China Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunmingYunnan 650093China

Functionalized two-dimensional(2D)materials play an important role in both fundamental sciences and practical *** construction and precise control of patterns at the atomic-scale are necessary for selective and multiple *** we report the fabrication of monolayer pentasilver diselenide(Ag_(5)Se_(2)),a new type of intrinsically patterned 2D material,by direct selenization of a Ag(111)*** atomic arrangement is determined by a combination of scanning tunneling microscopy(STM),low-energy electron diffraction(LEED),and density-functional-theory(DFT)***-scale STM images exhibit a quasi-periodic pattern of stoichiometric triangular domains with a side length of~15 nm and apical *** boundaries between triangular domains are *** of different molecules on the patterned Ag_(5)Se_(2) exhibits selective adsorption *** molecules preferentially adsorb on the boundaries,while tetracyanoquinodimethane(TCNQ)molecules adsorb both on the boundaries and the triangular *** co-depositing pentacene and TCNQ molecules,we successfully construct molecular corrals with pentacene on the boundaries encircling TCNQ molecules on the triangular *** realization of epitaxial large-scale and high-quality,monolayer Ag_(5)Se_(2) extends the family of intrinsically patterned 2D materials and provides a paradigm for dual functionalization of 2D materials.

关键词： two-dimensional materials dual functionalization scanning tunneling microscope epitaxial growth Ag_(5)Se_(2)monolayer

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