Introduction to the Special Issue on the APSPT-11

The Asia–Pacific International Symposium on the Basics and Applications of Plasma Technology (APSPT) has been held in Taiwan or Japan every two to four years since 1997. It is an important annual event in the Asia–Pacific area and has been a great platform for scientists all around the world sharing novel and state-of-the-art research findings and exchanging innovative ideas in the field of plasma science and technology. The $11^{\mathrm{ th}}$ APSPT was held on December 11–14, 2019, at Kanazawa University, Kanazawa, Japan. The $11^{\mathrm{ th}}$ APSPT had a very strong program consisting of 13 sessions with 201 articles contributed by the 210 participants from nine countries. This Special Issue focuses on the following topics, which were also the focus topics in the $11^{\mathrm{ th}}$ APSPT. 1) Plasmas in semiconductor materials processing. 2) Plasmas in biomedical and agricultural applications. 3) Plasmas in nano-materials processing. 4) Plasma coating and surface modifications. 5) Plasmas in aerospace/space applications. 6) Plasmas in energy and environmental applications. 7) Plasmas-in-liquid. 8) Multiphase plasmas. 9) Thermal plasmas. 10) Cold plasmas. 11) Plasma diagnostics and modeling. 12) Advanced and novel plasma technologies and sources. As Guest Editors, we thank all the authors, the reviewers, the editors, and the IEEE staff to publish this Special Issue on time. Particularly, we would like to offer our special thanks to the Editor-in-Chief, Dr. S. Gitomer, and the Senior Editor, Prof. P. Chu, for their guidance and help throughout the review process. We hope this Special Issue will help to exchange our knowledge in plasma science and cultivate potential collaboration in the community. We look forward to see all participants again in the $12^{\mathrm{ th}}$ APSPT at Taiwan University of Science and Technology, Taipei, Taiwan, in December 2021.