Magic Family of Discretely Sized Ultrabright Si Nanoparticles

Abstract

We describe a procedure for dispersion bulk Si into a family discretely sized ultrasmall ultrabright nanoparticles. We demonstrate that electrochemically etched, hydrogen capped Si(n)H(x), clusters with n larger than 20 are obtained within a family of discrete sizes. These sizes are 1.0 (Si29), 1.67 (Si123), 2.15, 2.9, and 3.7 nm diameter. We characterize the particles via direct electron imaging, excitation and emission optical spectroscopy, chromatography, 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 range is useful for biomedical tagging, RUB displays, and flash memories.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 2001
Accession Number
ADP012244

Entities

People

  • A. Smith
  • G. Belomoin
  • J. Therrien
  • R. Twesten
  • S.I. Rao

Organizations

  • University of Illinois Urbana–Champaign

Tags

Communities of Interest

  • Advanced Electronics
  • Biomedical

DTIC Thesaurus Topics

  • Band Gaps
  • Chromatography
  • Crystallization
  • Crystals
  • Density Functional Theory
  • Electron Microscopy
  • Energy Bands
  • Graphitic Materials
  • Materials
  • Materials Science
  • Micro-Machines
  • Nanocomposites
  • Nanoparticles
  • Particles
  • Phase Transformations
  • Physics
  • Spectroscopy

Readers

  • Integrated Circuit Design and Technology.
  • Molecular Photonics/Laser Physics
  • Nanoscale Plasmonic Nanotechnology

Technology Areas

  • Biotechnology
  • Microelectronics