| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1231012 | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy | 2013 | 5 Pages |
•Large areas and novel liquid-medicine-filter shaped have been fabricated.•The pre-coated Al2O3 layers solve the lattice mismatch and the growth problems.•PL reveals ultraviolet emission will provide an improvement for optical devices.
Liquid-medicine-filter shaped ZnO nanostructures have been synthesized on Al2O3-coated Si (1 1 1) substrates by chemical vapor deposition method (CVD) at 1050 °C. Every liquid-medicine-filter shaped ZnO nanostructure is made up of one nanorod and two nanowires at the ends. The liquid-medicine-filter shaped ZnO nanostructures are characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), energy dispersive spectrometer (EDS) photoluminescence (PL). The results indicate that the liquid-medicine-filter shaped ZnO nanostructures are wurtzite hexagonal structure and the growth direction is [0 0 0 1]. The liquid-medicine-filter shaped ZnO nanostructures became the new member of ZnO nanostructures for the novel configuration. PL reveals ultraviolet (UV) emission at 384 nm and a broad emission peak at 540 nm. These novel liquid-medicine-filter shaped ZnO nanostructures will provide an improvement for electronic and optical devices. The pre-prepared Al2O3 film on the Si (1 1 1) substrate solves the troublesome lattice mismatch problem between the Si substrate and ZnO, and makes the growth of liquid-medicine-filter shaped ZnO nanostructures more effective. In addition, the effect of screw dislocation and polar surfaces in understanding crystal growth mechanisms in nanometer scale were also provided.
Graphical abstractLiquid-medicine-filter shaped ZnO nanostructures have been synthesized on Al2O3-coated Si (1 1 1) substrates by chemical vapor deposition method (CVD). The liquid-medicine-filter shaped ZnO nanostructures are characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), high-resolution transmission electron microscopy (HRTEM), energy dispersive spectrometer (EDS) photoluminescence (PL). The results indicate that the liquid-medicine-filter shaped ZnO nanostructures are wurtzite hexagonal structure and the growth direction is [0 0 0 1]. For this novel configuration the liquid-medicine-filter shaped ZnO nanostructures became the new member of ZnO nanostructures. PL reveals ultraviolet (UV) emission at 384 nm and a broad emission peak at 540 nm. These novel liquid-medicine-filter shaped ZnO nanostructures will provide an improvement for electronic and optical devices. The pre-prepared Al2O3 film on the Si (1 1 1) substrates solves the troublesome lattice mismatch problem between the Si substrates and ZnO, and makes the growth of liquid-medicine-filter shaped ZnO nanostructures more effective.Figure optionsDownload full-size imageDownload as PowerPoint slide
