Reversible Tunability of the Near-Infrared Valence Band Plasmon Resonance in Cu2- xSe Nanocrystal

Research output: Contribution to journalArticleResearchpeer review

Authors

  • Dirk Dorfs
  • Thomas Härtling
  • Karol Miszta
  • Nadja C. Bigall
  • Mee Rahn Kim
  • Alessandro Genovese
  • Andrea Falqui
  • Mauro Povia
  • Liberato Manna

External Research Organisations

  • Center for Nanotechnology Innovation, Pisa
  • Fraunhofer Institute for Nondestructive Testing (IZFP)
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Details

Original languageEnglish
Pages (from-to)11175-11180
Number of pages6
JournalJournal of the American Chemical Society
Volume133
Issue number29
Publication statusPublished - 6 Jul 2011
Externally publishedYes

Abstract

We demonstrate that colloidal Cu2 - xSe nanocrystals exhibit a well-defined infrared absorption band due to the excitation of positive charge carrier oscillations (i.e., a valence band plasmon mode), which can be tuned reversibly in width and position by varying the copper stoichiometry. The value of x could be incrementally varied from 0 (no plasmon absorption, then a broad peak at 1700 nm) to 0.4 (narrow plasmon band at 1100 nm) by oxidizing Cu 2Se nanocrystals (upon exposure either to oxygen or to a Ce(IV) complex), and it could be incrementally restored back to zero by the addition of a Cu(I) complex. The experimentally observed plasmonic behavior is in good agreement with calculations based on the electrostatic approximation.

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Cite this

Reversible Tunability of the Near-Infrared Valence Band Plasmon Resonance in Cu2- xSe Nanocrystal. / Dorfs, Dirk; Härtling, Thomas; Miszta, Karol et al.
In: Journal of the American Chemical Society, Vol. 133, No. 29, 06.07.2011, p. 11175-11180.

Research output: Contribution to journalArticleResearchpeer review

Dorfs, D, Härtling, T, Miszta, K, Bigall, NC, Kim, MR, Genovese, A, Falqui, A, Povia, M & Manna, L 2011, 'Reversible Tunability of the Near-Infrared Valence Band Plasmon Resonance in Cu2- xSe Nanocrystal', Journal of the American Chemical Society, vol. 133, no. 29, pp. 11175-11180. https://doi.org/10.1021/ja2016284
Dorfs, D., Härtling, T., Miszta, K., Bigall, N. C., Kim, M. R., Genovese, A., Falqui, A., Povia, M., & Manna, L. (2011). Reversible Tunability of the Near-Infrared Valence Band Plasmon Resonance in Cu2- xSe Nanocrystal. Journal of the American Chemical Society, 133(29), 11175-11180. https://doi.org/10.1021/ja2016284
Dorfs D, Härtling T, Miszta K, Bigall NC, Kim MR, Genovese A et al. Reversible Tunability of the Near-Infrared Valence Band Plasmon Resonance in Cu2- xSe Nanocrystal. Journal of the American Chemical Society. 2011 Jul 6;133(29):11175-11180. doi: 10.1021/ja2016284
Dorfs, Dirk ; Härtling, Thomas ; Miszta, Karol et al. / Reversible Tunability of the Near-Infrared Valence Band Plasmon Resonance in Cu2- xSe Nanocrystal. In: Journal of the American Chemical Society. 2011 ; Vol. 133, No. 29. pp. 11175-11180.
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AU - Härtling, Thomas

AU - Miszta, Karol

AU - Bigall, Nadja C.

AU - Kim, Mee Rahn

AU - Genovese, Alessandro

AU - Falqui, Andrea

AU - Povia, Mauro

AU - Manna, Liberato

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