Controlled synthesis and characterization of single crystalline MnO nanowires and Mn-Si oxide heterostructures by vapor phase deposition

► Synthesis of mono phase MnO nanowires. ► Growth of Mn-Si oxide microwire/nanowall radial heterostructures. ► Effect of Mn partial pressure on the morphology and composition of nanostructures. ► Formation of Mn-Si-O compound layer between the substrate and nanostructures.