Observation of a magic discrete family of ultrabright Si nanoparticles

G. Belomoin, J. Therrien, A. Smith, S. Rao, R. Twesten, S. Chaieb, M. H. Nayfeh, L. Wagner, L. Mitas

Research output: Contribution to journalArticle

Abstract

We demonstrate that electrochemically etched, hydrogen capped Si nHx clusters with n larger than 20 are obtained within a family of discrete sizes. These sizes are 1.0 (Si29), 1.67 (Si 123), 2.15, 2.9, and 3.7 nm in diameter. We characterize the particles via direct electron imaging, excitation and emission optical spectroscopy, and colloidal crystallization. The band gaps and emission bands are measured. The smallest four are ultrabright blue, green, yellow and red luminescent particles. The availability of discrete sizes and distinct emission in the red, green and blue (RGB) range is useful for biomedical tagging, RGB displays, and flash memories.

Original languageEnglish (US)
Pages (from-to)841-843
Number of pages3
JournalApplied Physics Letters
Volume80
Issue number5
DOIs
StatePublished - Feb 4 2002

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Observation of a magic discrete family of ultrabright Si nanoparticles'. Together they form a unique fingerprint.

  • Cite this

    Belomoin, G., Therrien, J., Smith, A., Rao, S., Twesten, R., Chaieb, S., Nayfeh, M. H., Wagner, L., & Mitas, L. (2002). Observation of a magic discrete family of ultrabright Si nanoparticles. Applied Physics Letters, 80(5), 841-843. https://doi.org/10.1063/1.1435802