Peach-like ZnO microstructures are synthesized using vapor phase transport on MgO(001)substrates with a copper oxide(60 nm)buffer layer.The structure and morphology of the product are investigated using an x-ray diffr...Peach-like ZnO microstructures are synthesized using vapor phase transport on MgO(001)substrates with a copper oxide(60 nm)buffer layer.The structure and morphology of the product are investigated using an x-ray diffractometer(XRD)and a field-emission scanning electron microscope.The peaches have an average diameter of 3μm and a wurtzite structure.To study the optical properties,photoluminescence(PL)and Raman spectroscopy are employed.A strong UV emission at 380 nm in the PL spectra is observed,and a sharp and dominant peak at 437 cm^(-1) in the Raman spectrum can be assigned to the good crystallization of obtained product.In addition,the growth mechanism of the peach-like ZnO structure is tentatively investigated based on the EDX analysis and growth time.展开更多
Three-dimensional ZnO multipods are successfully synthesized on functional substrates using the vapor transport method in a quartz tube. The functional surfaces, which include two different distributions of Ag nanopar...Three-dimensional ZnO multipods are successfully synthesized on functional substrates using the vapor transport method in a quartz tube. The functional surfaces, which include two different distributions of Ag nanoparticles and a layer of commercial Ag nanowires, are coated onto silicon substrates before the growth of ZnO nanostructures. The structures and morphologies of the ZnO/Ag heterostructures are investigated using X-ray diffraction and field emission scanning electron microscopy. The sizes and shapes of the Ag particles affect the growth rates and initial nucleations of the ZnO structures, resulting in different numbers and shapes of multipods. They also influence the orientation and growth quality of the rods. The optical properties are studied by photoluminescence, UV-vis, and Raman spectroscopy. The results indicate that the surface plasmon resonance strongly depends on the sizes and shapes of the Ag particles.展开更多
基金Supported by the Exploratory Research of Malaysia under Grant No ERGS/11/STG/UPM/01/3.
文摘Peach-like ZnO microstructures are synthesized using vapor phase transport on MgO(001)substrates with a copper oxide(60 nm)buffer layer.The structure and morphology of the product are investigated using an x-ray diffractometer(XRD)and a field-emission scanning electron microscope.The peaches have an average diameter of 3μm and a wurtzite structure.To study the optical properties,photoluminescence(PL)and Raman spectroscopy are employed.A strong UV emission at 380 nm in the PL spectra is observed,and a sharp and dominant peak at 437 cm^(-1) in the Raman spectrum can be assigned to the good crystallization of obtained product.In addition,the growth mechanism of the peach-like ZnO structure is tentatively investigated based on the EDX analysis and growth time.
基金supported by the Exploratory Research Grant(ERGS)(Grant No.ERGS//11/STG/UPM/01/3)
文摘Three-dimensional ZnO multipods are successfully synthesized on functional substrates using the vapor transport method in a quartz tube. The functional surfaces, which include two different distributions of Ag nanoparticles and a layer of commercial Ag nanowires, are coated onto silicon substrates before the growth of ZnO nanostructures. The structures and morphologies of the ZnO/Ag heterostructures are investigated using X-ray diffraction and field emission scanning electron microscopy. The sizes and shapes of the Ag particles affect the growth rates and initial nucleations of the ZnO structures, resulting in different numbers and shapes of multipods. They also influence the orientation and growth quality of the rods. The optical properties are studied by photoluminescence, UV-vis, and Raman spectroscopy. The results indicate that the surface plasmon resonance strongly depends on the sizes and shapes of the Ag particles.
