Generalized synthesis of hybrid metal-semiconductor nanostructures tunable from the visible to the infrared

Bishnu P. Khanal, Anshu Pandey, Liang Li, Qianglu Lin, Wan Ki Bae, Hongmei Luo, Victor I. Klimov, Jeffrey M. Pietryga

Research output: Contribution to journalArticle

85 Citations (Scopus)

Abstract

Hybrid superstructures allow a convenient route to the development of materials with multiple functionalities (e.g., sensor, marker, conductor) out of monofunctional (e.g., excitonic, plasmonic) building blocks. This work describes a general synthetic route to the preparation of metal|- dielectric|quantum dot hybrid superstructures that have excitonic and plasmonic resonances independently tunable from the ultraviolet to the mid-infrared spectral region. We demonstrate that structural tuning can be used to control intercomponent coupling leading to the emergence of unique optical properties. We illustrate this capability by demonstrating single- and multicolor emission from coupled systems, and a significant enhancement of two-photon absorption cross sections of quantum dots. Such properties in a robust yet dispersible particle can be useful in a number of applications including bioimaging and microscopy, and in optoelectronic devices, as well as serve as a platform for fundamental studies of metal-semiconductor interactions.

Original languageEnglish
Pages (from-to)3832-3840
Number of pages9
JournalACS nano
Volume6
Issue number5
DOIs
Publication statusPublished - May 22 2012

    Fingerprint

Keywords

  • Excitons
  • Metal nanoparticles
  • Multifunctional materials
  • Plasmons
  • Quantum dots
  • Two-photon absorption

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Khanal, B. P., Pandey, A., Li, L., Lin, Q., Bae, W. K., Luo, H., Klimov, V. I., & Pietryga, J. M. (2012). Generalized synthesis of hybrid metal-semiconductor nanostructures tunable from the visible to the infrared. ACS nano, 6(5), 3832-3840. https://doi.org/10.1021/nn204932m