Kim, Seong Been Kim, Sungwoong Kwon, Sun Sang Lee, Won Woo Kim, Jin-Sang Park, Won Il 2024-01-20T11:04:10Z 2024-01-20T11:04:10Z 2021-09-05 2013-11 0002-7820 https://pubs.kist.re.kr/handle/201004/127488 Zn-polar (0001) surfaces are more chemically reactive than other surfaces of ZnO crystals and drive preferential anisotropic and asymmetric growth along the [0001] direction, which facilitates growth of c-axis oriented, one-dimensional ZnO nanostructures. Accordingly, capping the top (0001) surface of ZnO crystals can impede c-axis growth and thus serve to modulate growth habits. In this study, we generated vertically aligned ZnO hexagonal nanotube-rod (h-NTR) hybrids by modulating growth habits during a second-stage process. Electron microscopy studies revealed the formation of very thin (10-20nm) single-crystalline nanotube walls along the edges of underlying hexagonal rod tops capped with Si. In addition, spatially resolved investigation of ZnO h-NTR indicated an abrupt increase in the measured bandgap across rod-tube junctions, which was ascribed to a quantum confinement effect and Burstein-Moss effect of carriers within the very thin nanotube walls. English WILEY SURFACE POLARITY CATHODOLUMINESCENCE NANOSTRUCTURES NANORODS Large-Scale Synthesis of Vertically Aligned ZnO Hexagonal Nanotube-Rod Hybrids Using a Two-Step Growth Method Article 10.1111/jace.12507 1 JOURNAL OF THE AMERICAN CERAMIC SOCIETY, v.96, no.11, pp.3500 - 3503 JOURNAL OF THE AMERICAN CERAMIC SOCIETY 96 11 3500 3503 scie scopus 000326712200023 2-s2.0-84887816288 Materials Science, Ceramics Materials Science Article SURFACE POLARITY CATHODOLUMINESCENCE NANOSTRUCTURES NANORODS