Scientific Results

Single-molecule study for a graphene-based nano-position sensor

Year: 2014

Authors: Mazzamuto G., Tabani A., Pazzagli S., Rizvi S., Reserbat-Plantey A., Schädler K., Navickaite G., Gaudreau L., Cataliotti F.S., Koppens F., Toninelli C.

Autors Affiliation: LENS and Università di Firenze, Via Nello Carrara 1, I-50019 Sesto Fiorentino, Italy; Dipartimento di Fisica ed Astronomia, Via Sansone 1, I-50019 Sesto Fiorentino, Italy; QSTAR, Largo Enrico Fermi 2, I-50125 Firenze, Italy; INO, Istituto Nazionale di Ottica, Largo Fermi 6, I-50125 Firenze, Italy; ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, E-08860 Castelldefels, Barcelona, Spain

Abstract: In this study we lay the groundwork for a graphene-based fundamental ruler at the nanoscale. It relies on the efficient energy-transfer mechanism between single quantum emitters and low-doped graphene monolayers. Our experiments, conducted with dibenzoterrylene (DBT) molecules, allow going beyond ensemble analysis due to the emitter photo-stability and brightness. A quantitative characterization of the fluorescence decayrate modification is presented and compared to a simple model, showing agreement with the d(-4) dependence, a genuine manifestation of a dipole interacting with a 2D material. With DBT molecules, we can estimate a potential uncertainty in position measurements as low as 5 nm in the range below 30 nm.

Journal/Review: NEW JOURNAL OF PHYSICS

Volume: 16      Pages from: 113007  to: 113007

More Information: This work was supported by the Seventh Framework Programme for Research of the European Comission, under FET-Open grant MALICIA (265522) and by MIUR under FIRB Futuro in Ricerca project HYTEQ. CT acknowledges support from the Caroline von Humboldt Prize 2011. FK acknowledges support by the Fundacio Cellex Barcelona, the ERC Career integration grant 294056 (GRANOP), the ERC starting grant 307806 (CarbonLight) and support by the EC under Graphene Flagship (contract no. CNECT-ICT-604391). We thank M Inguscio, D S Wiersma, M Bellini and M Gurioli for fruitful discussions and continuous support. We also wish to thank also B Tiribilli at the ISC-CNR (Florence) for the realization of the AFM measurements and M Santoro (LENS, Florence) for the Raman characterization of graphene samples.
KeyWords: graphene; nano-sensor; single molecule; spectroscopy; lifetime measurements
DOI: 10.1088/1367-2630/16/11/113007

Citations: 14
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