期刊
SURFACES AND INTERFACES
卷 23, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.surfin.2021.100930
关键词
Electrophoretic deposition; ZnO nanorod; Self-assembled nanostructures; Si substrate; Photoluminescence
类别
资金
- SCAIT-UNT [PIUNT E637]
- CONICET [PIP 411]
- ANPCyT
- FONCyT [BID PICT 2015-0865]
This study explored the conditions for the direct self-assembly of one-dimensional ZnO nanorod bunches on boron-doped crystalline Si substrates with different conductivities. The results showed differences in the morphology of ZnO nanostructures depending on the Si substrate conductivity used, and XRD patterns indicated preferential formation of ZnO nanorods in the (002) direction. Photoluminescence measurements revealed quantum confined excitons and high emission intensity in the visible range, while spectra showed emission was dominated by the ZnO nanoparticles forming the nanostructures. The study expands the EPD technique applications to form nanorod nanostructures in a single step.
To date, EPD obtained ZnO one-dimensional nanostructures have been achieved by depositing ZnO nanoparticles through a sacrificial anodic alumina membrane or promoted by the presence of pre-deposited Au nanoclusters on the substrate. In the present work, we explored using boron (p-type)-doped crystalline Si (100) substrates with different conductivities. We found the conditions for the direct self-assembly of one-dimensional ZnO nanorod bunches, in a novel and easy way, at room temperature. A colloidal dispersion of approximate to 5 nm-sized ZnO nanoparticles in 2-propanol was used. The results showed differences in the morphology of ZnO nanostructures depending on the Si substrate conductivity used. XRD patterns indicated that ZnO nanorods were preferentially formed in (002) direction corresponding to c-axis orientation in the wurtzite structure. Photoluminescence measurements revealed the presence of quantum confined excitons and high emission intensity in the visible range. Photoluminescence spectra showed that emission was dominated by the ZnO nanoparticles that form the nanostructures and not by the morphology or size of the nanostructures themselves. The results presented in this work expand the EPD technique applications to form nanorod nanostructures in a single step.
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