Abstract
In this work we report the structural and morphological properties of α-PbO nanoplates obtained by high energy ball milling from commercial PbO powder. The high energy ball milling process induces a PbO crystalline phase transfomation from initial massicot (β-PbO) to litharge (α-PbO) after 5h. The PbO nanoplates have litharge crystalline phase and thickness between 20–30nm. The Raman spectrum of the α-PbO nanoplates displays the bands related to bulk PbO and two additional bands at frequencies 464 and 530cm−1, which were associated to size effects in the nanoplates. Density functional theory calculations of the vibration properties of small α-PbO clusters predicted vibration modes at frequencies which agree with the experimental results.
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