Journal Article

PUBDB-2022-01333

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Surface functionalization of few-layer graphene on β -SiC(001) by Neutral Red dye

Potorochin, D. (Corresponding author)XFEL.EU*DESY* ; Chaika, A. N. ; Molodtsova, O.DESY* ; Aristov, V.Extern* ; Marchenko, D. E. ; Smirnov, D. A. ; Makarova, A. A. ; Walls, B. ; Zhussupbekov, K. ; Walshe, K. ; Shvets, I. V. ; Ciobanu, A. S.DESY* ; Rabchinskii, M. K. ; Ulin, N. V. ; Baidakova, M. V. ; Brunkov, P. N. ; Molodtsov, S.XFEL.EU*

2022
Elsevier Amsterdam

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Please use a persistent id in citations: doi:10.1016/j.apsusc.2022.152542  doi:10.3204/PUBDB-2022-01333

Abstract: Few-layer graphene on -SiC(001) functionalized with phenazine dye Neutral Red by means of diazonium chemistry has been studied using X-ray photoelectron spectroscopy, near-edge X-ray absorption fine structure, photoemission electron microscopy, scanning tunneling microscopy, and density functional theory calculations. The experimental data reveal the formation of a composite phenazine dye/graphene structure with a large energy gap. The molecules in this structure can be oriented both parallel and perpendicular to the graphene surface. According to scanning tunneling spectroscopy and theoretical calculations, the density of electron states in different surface areas depends on the local short-range order and the molecules’ environment. On the other hand, the photoemission spectroscopy study shows that the bottom layers of the few-layer graphene remain intact, which inherently makes the synthesized layered composite a low-dimensional metal/semiconductor heterostructure. In addition, photoemission electron microscopy imaging shows a high homogeneity of the dye-modified graphene on a micrometer scale.

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Contributing Institute(s):

1. PETRA-S (FS-PETRA-S)
2. FS-Arbeitsgruppe (FS-TI)
3. DOOR-User (DOOR ; HAS-User)
4. Theory (XFEL_E2_THE)

Research Program(s):

1. 631 - Matter – Dynamics, Mechanisms and Control (POF4-631) (POF4-631)
2. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)

Experiment(s):

1. PETRA Beamline P04 (PETRA III)

Appears in the scientific report 2022

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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