Nonphotochemical Laser-Induced Crystal Nucleation by an Evanescent Wave
- Martin R. Ward (1662505)
- Alasdair Rae (1662502)
- Andrew J. Alexander (1662499)
DOIAbstract
Crystal nucleation at a glass–solution interface has been demonstrated by evanescent-wave laser-induced nucleation for the first time. Nucleation was induced in supersaturated aqueous potassium chloride (KCl) solutions. The interaction volume was estimated to be <2 nL, localized within approximately 100 nm of the interface. Measurements of the power dependence of nucleation events showed a laser power threshold that was approximately 3 times higher than that in experiments in bulk solution; the average number of nucleation events above threshold was similar to that in bulk. Surfaces treated with a hydrophobic polydimethylsiloxane-based coating showed no nucleation over the coated regions. The localization offered by this method has signific...
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