RIS ID

105845

Publication Details

Chen, K. K., Liao, K., Casillas, G., Li, Y. & Ozin, G. A. (2016). Cationic silicon nanocrystals with colloidal stability, pH-independent positive surface charge and size tunable photoluminescence in the near-infrared to red spectral range. Advanced Science, 3 (2), 1500263-1-1500263-8.

Abstract

In this report, the synthesis of a novel class of cationic quaternary ammonium-surface-functionalized silicon nanocrystals (ncSi) using a novel and highly versatile terminal alkyl halide-surface-functionalized ncSi synthon is described. The distinctive features of these cationic ncSi include colloidal stability, pH-independent positive surface charge, and size-tunable photoluminescence (PL) in the biologically relevant near-infrared-to-red spectral region. These cationic ncSi are characterized via a combination of high-resolution scanning transmission electron microscopy with energy-dispersive X-ray analysis, Fourier transform infrared, X-ray photoelectron, and photoluminescence spectroscopies, and zeta potential measurements.

Grant Number

ARC/LE120100104

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Link to publisher version (DOI)

http://dx.doi.org/10.1002/advs.201500263