Carbon Dots-Plasmonics Coupling Enables Energy Transfer and Provides Unique Chemical Signatures

Lihi Efremushkin, Susanta Kumar Bhunia, Raz Jelinek, Adi Salomon

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Plasmonic nanostructures and carbon dots (C-dots) are fascinating optical materials, utilized in imaging, sensing, and color generation. Interaction between plasmonic materials and C-dots may lead to new hybrid materials with controllable optical properties. Herein, we demonstrate for the first time coupling between plasmonic modes and C-dots deposited upon a plasmonic silver hole array. The coupling leads to a remarkable visual attenuation and shifts of the plasmonic wavelengths (i.e., color tuning). In particular, the C-dots-plasmon couplings and pertinent color transformations depend both upon the C-dots' fluorescence emission wavelengths and functional residues displayed upon the C-dots' surface. This optical modulation corresponds to energy level alignment and consequent energy transfer between the C-dots and the plasmonic silver hole array. Notably, the energy coupling observed in the C-dot-plasmonic hybrid system allows distinguishing between C-dots species exhibiting similar optical properties, albeit displaying different functional residues.

Original languageEnglish
Pages (from-to)6080-6085
Number of pages6
JournalJournal of Physical Chemistry Letters
Issue number24
StatePublished - 21 Dec 2017

Bibliographical note

Publisher Copyright:
© 2017 American Chemical Society.


A.S. and L.E. acknowledge the GIF Grant No. 203785. S.K.B. is grateful to the Planning and Budgeting Committee (PBC) of the Israeli Council for Higher Education for an Outstanding Postdoctoral Fellowship. R.J. is grateful for financial assistance, MoST Infrastructure Grant No. 3-12974.

FundersFunder number
German-Israeli Foundation for Scientific Research and Development203785
Ministry of Science and Technology, Taiwan3-12974
Council for Higher Education


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