Structural analysis of PTCDA monolayers on epitaxial graphene with ultra-high vacuum scanning tunneling microscopy and high-resolution X-ray reflectivity
نویسندگان
چکیده
a Department of Materials Science and Engineering and Materials Research Science and Engineering Center, Northwestern University, 2220 Campus Drive, Evanston, IL 60208, United States b École Supérieure de Physique et de Chimie Industrielles de la ville de Paris, ParisTech, 10, rue Vauquelin, 75231, Paris, France c Chemical Science and Engineering Division, Argonne National Laboratory, 9700S. Cass Avenue, Argonne, IL, 60208, United States d Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, United States
منابع مشابه
Seeding atomic layer deposition of high-k dielectrics on epitaxial graphene with organic self-assembled monolayers.
The development of high-performance graphene-based nanoelectronics requires the integration of ultrathin and pinhole-free high-k dielectric films with graphene at the wafer scale. Here, we demonstrate that self-assembled monolayers of perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA) act as effective organic seeding layers for atomic layer deposition (ALD) of HfO(2) and Al(2)O(3) on epitaxi...
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Scanning tunnelling microscopy and X-ray reflectivity are used to characterize adlayers of perylenetetracarboxylic diimide (PTCDI) deposited on epitaxial graphene (EG) on SiC(0001). PTCDI adopts a herringbone structural phase on EG/SiC that can accommodate sub-5 nm voids with molecularly defined boundaries and isolated molecular vacancies at room temperature. The PTCDI monolayer remains intact ...
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The growth of three-dimensional ultra-fine spherical nano-particles of silver on few layers of graphene derived from highly oriented pyrolytic graphite in ultra-high vacuum were characterized using in situ scanning tunneling microscopy (STM) in conjunction with X-ray photoelectron spectroscopy. The energetics of the Ag clusters was determined by DFT simulations. The Ag clusters appeared spheric...
متن کاملVideo-STM, LEED and X-ray diffraction investigations of PTCDA on graphite
Thin films of the organic molecule perylene-3,4,9,10tetracarboxylic-dianhydride ("PTCDA") on graphite(0001) have been investigated from the monoto the multilayer regime with low energy electron diffraction (LEED), X-ray-diffraction in Bragg-Brentano geometry, and high resolution scanning tunneling microscopy (STM). These different methods proved epitaxial growth in a coincident superstructure a...
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