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RESEARCH PRODUCT

Optical Imaging and Spectroscopy of Atomically Precise Armchair Graphene Nanoribbons

Steven G. LouieSteven G. LouieFeng WangFeng WangKlaus MüllenKlaus MüllenSheng WangSheng WangJan OverbeckTairu LyuTing CaoTing CaoAkimitsu NaritaSihan ZhaoRoman FaselRoman FaselPascal RuffieuxRimah DarawishMichel CalameSteve DrapchoGabriela Borin BarinTim Dumslaff

subject

Optical contrastAbsorption spectroscopy530 Physicsbusiness.industryMechanical EngineeringBioengineering02 engineering and technologyGeneral Chemistry021001 nanoscience & nanotechnologyCondensed Matter PhysicsPolarization (waves)Optical imaging540 Chemistry570 Life sciences; biologyOptoelectronicsGeneral Materials ScienceOptical identification0210 nano-technologybusinessSpectroscopyAb initoGraphene nanoribbons

description

We report the optical imaging and absorption spectroscopy on atomically precise armchair graphene nanoribbons (GNRs) on insulating fused silica substrates. This is achieved by controlling light polarization on macroscopically aligned GNRs which greatly enhances the optical contrast of the submonolayer GNRs on the insulating substrates. We measure the linear absorption spectra of 7-armchair and 9-armchair GNRs in this study, and the experimental data agree qualitatively with ab inito calculation results. The polarization spectroscopy technique enables an unambiguous optical identification of GNRs and provides a rapid tool to characterize the transferred film over a large area.

yearjournalcountryeditionlanguage
2019-01-01Nano Letters
https://doi.org/10.1021/acs.nanolett.9b04497