Adsorption of 5-Fluorouracil on Au(111) and Cu(111) surfaces

被引：6

作者：

Cassidy, Andrew ^{[1
]}

Tsud, Nataliya ^{[2
]}

Bercha, Sofiia ^{[2
]}

Feyer, Vitaliy ^{[3
,4
]}

Prince, Kevin C. ^{[5
,6
]}

Plekan, Oksana ^{[5
]}

机构：

[1] Aarhus Univ, Dept Phys & Astron, Ny Munkegade 120, DK-8000 Aarhus C, Denmark

[2] Charles Univ Prague, Fac Math & Phys, Dept Surface & Plasma Sci, V Holesovickach 2, Prague 18000 8, Czech Republic

[3] Res Ctr Julich, Peter Grunberg Inst PGI 6, D-52425 Julich, Germany

[4] Res Ctr Julich, JARA FIT, D-52425 Julich, Germany

[5] Sincrotrone Trieste SCpA, Area Sci Pk,Str Statale 14,Km 163-5, I-34149 Trieste, Italy

[6] CNR, IOM, Area Sci Pk,Str Statale 14,Km 163-5, I-34149 Trieste, Italy

来源：

AIP ADVANCES | 2019年 / 9卷 / 08期

关键词：

SCANNING-TUNNELING-MICROSCOPY; X-RAY-ABSORPTION; THIN-FILM; URACIL; DNA; THYMINE; ENERGY; GOLD; CHEMISORPTION; DERIVATIVES;

D O I：

10.1063/1.5108801

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The adsorption of 5-Fluorouracil (5FU) on Au(111) and Cu(111) surfaces as a function of molecular coverage and temperature has been studied, using x-ray photoelectron spectroscopy (XPS) and near-edge x-ray absorption fine structure (NEXAFS) spectroscopy. The nature of 5-Fluorouracil bonding with the two substrates is remarkably different. The Cu substrate forms a chemisorbed complex with 5-FU while the Au substrate shows only physisorption. NEXAFS data at the C, N and O K-edge show a strong angular dependence, indicating that 5-FU lies nearly parallel on the inert Au(111) surface, and at a steep angle on the Cu(111) surface. 5-FU is a biomolecule used for cancer treatment and the results are relevant for those using metal surfaces to prepare 5-FU for applications such as drug delivery. (C) 2019 Author(s).

引用

页数：10

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