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van der Waals-induced chromatic shifts in hydrogen-bonded two-dimensional porphyrin arrays on boron nitride

Korolkov, Vladimir V.; Svatek, Simon A.; Summerfield, Alex; Kerfoot, James; Yang, Lixu; Taniguchi, Takashi; Watanabe, Kenji; Champness, Neil R.; Besley, Nicholas A.; Beton, Peter H.

Authors

Vladimir V. Korolkov

Simon A. Svatek

Alex Summerfield

James Kerfoot

Lixu Yang

Takashi Taniguchi

Kenji Watanabe



Abstract

The fluorescence of a two-dimensional supramolecular network of 5,10,15,20-tetrakis(4-carboxylphenyl)porphyrin (TCPP) adsorbed on hexagonal boron nitride (hBN) is red shifted due to, primarily, adsorbate–substrate van der Waals interactions. TCPP is deposited from solution on hBN and forms faceted islands with typical dimensions of 100 nm and either square or hexagonal symmetry. The molecular arrangement is stabilized by in-plane hydrogen bonding as determined by a combination of molecular resolution atomic force microscopy performed under ambient conditions and density functional theory; a similar structure is observed on MoS2 and graphite. The fluorescence spectra of submonolayers of TCPP on hBN are red-shifted by ∼30 nm due to the distortion of the molecule arising from van der Waals interactions, in agreement with time-dependent density functional theory calculations. Fluorescence intensity variations are observed due to coherent partial reflections at the hBN interface, implying that such hybrid structures have potential in photonic applications.

Journal Article Type Article
Publication Date Sep 8, 2015
Journal ACS Nano
Print ISSN 1936-0851
Electronic ISSN 1936-086X
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 9
Issue 10
APA6 Citation Korolkov, V. V., Svatek, S. A., Summerfield, A., Kerfoot, J., Yang, L., Taniguchi, T., …Beton, P. H. (2015). van der Waals-induced chromatic shifts in hydrogen-bonded two-dimensional porphyrin arrays on boron nitride. ACS Nano, 9(10), doi:10.1021/acsnano.5b04443
DOI https://doi.org/10.1021/acsnano.5b04443
Keywords boron nitride, fluorescence, molybdenum disulfide, atomic force microscopy, porphyrin
Publisher URL http://pubs.acs.org/doi/10.1021/acsnano.5b04443
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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