Abstract
A thermal evaporation approach was developed to synthesize single-crystalline MgO whiskers on silver (Ag) layer-coated Si substrates. Magnesium diboride (MgB2) and oxygen (O2) were used as Mg and, O precursors, respectively. The synthetic process using a thinner Ag layer facilitated the growth of 1D whiskers, and the product mainly comprises film-like structures with thicker Ag layer thickness. X-ray diffraction and selected area electron diffraction pattern revealed that the whiskers were of a single-crystalline cubic structure of MgO. We also discuss the possible mechanism by which the thickness of the underlying Ag layer affects the resultant morphology of the MgO structures.
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