In situ study of wet chemical etching of ZnO nanowires with different diameters and polar surfaces by LCTEM
Source abstract
Abstract
Understanding how nanomaterials evolve during the etching process is critical in many fields. Herein, the wet chemical etching process of zinc oxide (ZnO) nanowires is studied in situ in radiolytic water via liquid cell transmission electron microscopy (LCTEM). The dissolution rate of thin nanowires is constant with reducing diameter, while thick nanowires (with the original diameter being larger than 95 nm) show complicated etching behaviors. The dissolution rate of thick nanowires is constant at the first stage and then increases. Anisotropic etching occurs at both ends of thick nanowires and distinct tips are formed. Different polarities at the two ends of the nanowire lead to differently shaped tips and different tip formation processes. The arrangement of the sidewall cones determines the macroscopic angle of the final tips. The present results are important for understanding liquid phase etching behavior in different dimensions and with different polar ends.
Source: europepmc · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: ZnO doping and properties · Nanowire Synthesis and Applications · Anodic Oxide Films and Nanostructures
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Key Laboratory for the Physics and Chemistry of Nanodevices, School of Electronics, Peking University, Beijing 100871, China
Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei 230026, China
Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Advanced Energy Materials and Technologies, University of Science and Technology Beijing, Beijing 100083, China
National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Institute of Microelectronics, Peking University, Beijing 100871, China
Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, China
Funding
National Natural Science Foundation of China
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