Vibrational signature of the graphene nanoribbon edge structure from high-resolution electron energy-loss spectroscopy

被引：3

作者：

Cavani, Nicola ^{[1
,2
]}

De Corato, Marzio ^{[1
]}

Ruini, Alice ^{[1
,2
]}

Prezzi, Deborah ^{[2
]}

Molinari, Elisa ^{[1
,2
]}

Rizzini, Alberto Lodi ^{[1
]}

Rosi, Agnese ^{[1
]}

Biagi, Roberto ^{[1
,2
]}

Corradini, Valdis ^{[2
]}

Wang, Xiao-Ye ^{[3
]}

Feng, Xinliang ^{[4
,5
]}

Narita, Akimitsu ^{[3
]}

Mullen, Klaus ^{[3
]}

De Renzi, Valentina ^{[1
,2
]}

机构：

[1] Univ Modena & Reggio Emilia, Dipartimento Sci Fis Informat & Matemat FIM, I-41125 Modena, Italy

[2] Ist Nanosci CNR NANO, Ctr S3, I-41125 Modena, Italy

[3] Max Planck Inst Polymer Res, Ackermannweg 10, D-55128 Mainz, Germany

[4] Tech Univ Dresden, Ctr Adv Elect Dresden CFAED, Mommsenstr 4, D-01062 Dresden, Germany

[5] Tech Univ Dresden, Dept Chem & Food Chem, Mommsenstr 4, D-01062 Dresden, Germany

来源：

NANOSCALE | 2020年 / 12卷 / 38期

基金：

欧盟地平线“2020”;

关键词：

CHEMICAL-VAPOR-DEPOSITION; ON-SURFACE SYNTHESIS; BAND-GAP; FINGERPRINTS;

D O I：

10.1039/d0nr05763k

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Bottom-up approaches exploiting on-surface synthesis reactions allow atomic-scale precision in the fabrication of graphene nanoribbons (GNRs); this is essential for their technological applications since their unique electronic and optical properties are largely controlled by the specific edge structure. By means of a combined experimental-theoretical investigation of some prototype GNRs, we show here that high-resolution electron energy-loss spectroscopy (HREELS) can be successfully employed to fingerprint the details of the GNR edge structure. In particular, we demonstrate how the features of HREEL vibrational spectra - mainly dictated by edge CH out-of-plane modes - are unambiguously related to the GNR edge structure. Moreover, we single out those modes which are localized at the GNR termini and show how their relative intensity can be related to the average GNR length.

引用

页码：19681 / 19688

页数：8

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