Various shaped-ZnO nanocrystals via low temperature synthetic methods: Surfactant and pH dependence |
| |
Institution: | 1. Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, 501 Jinju-daero, Jinju 660-701, Republic of Korea;2. Department of Chemistry and Institute of Basic Science, Chonnam National University, Gwangju 500-757, Republic of Korea;1. Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju 660-701, Republic of Korea;2. Department of Chemistry and Department of Biophysics and Chemical Biology, Seoul National University, Seoul 151-747, Republic of Korea;1. Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, Republic of Korea;2. Core-Facility Center for Photochemistry & Nanomaterials, Gyeongsang National University, Jinju 52828, Republic of Korea;1. Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju, 52828, South Korea;2. Core-Facility Center for Photochemistry & Nanomaterials, Gyeongsang National University, Jinju, 52828, South Korea |
| |
Abstract: | ZnO nanocrystals, rod-, carnation-, and flower-like structures, have been synthesized in a high yield through low-temperature synthetic methods. Well-aligned ZnO nanorods having hexagonal wurtzite structure were grown on the ZnO thin films assembled by a spin-coating method. The morphologies of ZnO seed films are affected by pHs of sol–gel solutions, resulting smaller sizes and homogeneous roughness at higher pHs and higher number of spin-coating times. The carnation-like structures, average size of about 2–3 μm, were assembled by tens of uniform ZnO nanosheet petals of ~50 nm in thickness when a different volume ratio of the precursory solution was used. ZnO nanocrystals on the facets of the compact ZnO nanorods have grown to linear nanorods having an average diameter of ~500 nm and length of ~2 μm. Furthermore, a noticeable difference in the growth of ZnO nanocrystals in the presence of various surfactants, polyvinylpyrrolidone, polyvinylsulphonic acid, and polyethyleneimine, has been observed and discussed. |
| |
Keywords: | Nanostructures Metal oxides Sol–gel chemistry X-ray diffraction ZnO |
本文献已被 ScienceDirect 等数据库收录! |
|