Abstract
The surfactant-free synthesis of β-phase germanium dioxide nanoparticles in ortho-methoxy benzyl alcohol and benzyl alcohol has been reported. Characterisation of the hexagonal β-GeO2 crystals, which involves powder X-ray diffraction, nitrogen adsorption measurements (Brunauer-Emmett-Teller method), dynamic light scattering measurements, IR spectroscopy, transmission electron microscopy and energy-dispersive X-ray analysis has been presented. Synthesis of β-GeO2 under ambient conditions in benzyl alcohol results in nanoparticles with diameters below 20 nm, whereas the synthesis under inert conditions in benzyl alcohol at reflux (205°C) gives larger nanoparticles. In ortho-methoxy benzyl alcohol, agglomerates with particle sizes above 100 nm are observed under inert atmosphere conditions at room temperature.
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