journal article·2022

Revealing the truncated conical geometry of nanochannels in anodic aluminium oxide membranes

Junxi Zhang, Huaping Zhao, Ming Gong, Lide Zhang, Zhijun Yan, Kang Xie, Guangtao Fei, Xiaoguang Zhu, Mingguang Kong, Shuyuan Zhang, Lin Zhang, Yong Lei

Nanoscale· Volume 14· Issue 14
Publisher page

Abstract

AAO template-based methods. However, observation of whole nanochannels with nanometer-resolution in thick AAO membranes remains a fundamental challenge, and the nanochannel geometry has not yet been sufficiently elucidated. Here, for the first time, we use depth-profiling transmission electron microscopy to reveal the truncated conical geometry of whole nanochannels of 70 μm in length. Such shape nonuniformity of the nanochannels leads to different reflectance properties of the different depths of the nanochannels along their long axis for one AAO membrane, which suggests that the nonuniformity result in some effects on applications of the nanostructures. Furthermore, we introduce a shape factor to evaluate the shape nonuniformity and demonstrate that the nonuniformity can be remarkably removed by an effective etching method based on a temperature gradient regime.
Source: openalex_inverted_index · Quality: candidate unverified · Source record ↗

Research context

OpenAlex topics: Anodic Oxide Films and Nanostructures · Smart Materials for Construction · Nanopore and Nanochannel Transport Studies

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Instrument Science and Opto-electronics Engineering, Anhui Key Laboratory of Advanced Functional Materials and Devices, and Anhui Province Key Laboratory of Measuring Theory and Precision Instrument, Hefei University of Technology, Hefei 230009, China

Institute of Physics & IMN MacroNano, Ilmenau University of Technology, Ilmenau 98693, Germany

Laboratory of Engineering and Material Science, University of Science and Technology of China, Hefei 230027, China

Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, China

School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China

School of Opto-Electronic Engineering, Zaozhuang University, Zaozhuang 277160, Shandong, China

Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, China

Aston Institute of Photonic Technologies, School of Engineering & Applied Science, Aston University, Birmingham B4 7ET, UK

Funding

National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities · Seventh Framework Programme

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