Deaggregation of diamond nanoparticles studied by NMR

A. M. Panich, A. E. Aleksenskii

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

Nanodiamond (ND) particles are usually bound in aggregates that are difficult to separate into a single nanoparticle form, which restrains their applications. Recently, a stable suspension of deaggregated NDs [1] has been prepared using annealed ND samples. We discuss the mechanism of deaggregation of these NDs based on our 1H NMR data. We show that in contrast with the spectra of the initial sample, those of the annealed sample evidence fast proton exchange between the surface carboxyl groups and adsorbed water molecules and the formation of charged ND-COO - ↔ H 3O + structures, which results in repulsion of ND particles and yields a stable aqueous suspension of isolated NDs.

Original languageEnglish
Pages (from-to)45-48
Number of pages4
JournalDiamond and Related Materials
Volume27-28
DOIs
StatePublished - 1 Jul 2012

Keywords

  • Deaggregation
  • Nanodiamond
  • Nanoparticle
  • Nuclear magnetic resonance (NMR)

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • General Chemistry
  • Mechanical Engineering
  • General Physics and Astronomy
  • Materials Chemistry
  • Electrical and Electronic Engineering

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