| No. 141 Vol.37 No.2(2021)CONTENTSPreface 1 ●Carbon: Quo-Vadis ――――――――――――――――――――――――――――――― Christoph E. Nebel 
 Scientific Tutorials 3 Dislocations in CVD Diamond Characterized by Confocal Raman Imaging ―――――― Kimiyoshi Ichikawa, Takehiro Shimaoka, Yukako Kato, Satoshi Koizumi and Tokuyuki Teraji 9 Electrical Responses of a Carbon Nanotube Thin-film Transistor to Proton Irradiation in Air ―――――――――――――――――――――― Satoshi Ishii, Teruaki Konishi and Tsuyoshi Hamano 14 Gate Controlled Dielectric Function of Bilayer Graphene ――――― Shun Okano and Dietrich R. T. Zahn 
 Technical Tutorials 18 Growth of the Longest CNT Forest ――――――――――――――――――――――――――― Hisashi Sugime 
 Topics 25 Amorphous Carbon Based Electrocatalyst: Oxygen Reduction Reactivity by Controlling Surface functionalities ―――――――――――――――――――――――― Kensuke Honda 28 Improvement of Energy Conversion Efficiency of Beta Voltaic Cell using Diamond pn Junction ――― Takehiro Shimaoka, Hitoshi Umezawa, Kimiyoshi Ichikawa, Julien Pernot and Satoshi Koizumi 30 Graphene Permeation Process of O2 Molecules Induced by Translational Kinetic Energy ――――――――――――――――――――――――――――――― Shuichi Ogawa and Takatoshi Yamada 32 Ultra-high Efficiency Graphene Planar Electron Source ―――――――――――― Katsuhisa Murakami 
 My LAB 35 Kanazawa University NanoMaterials Research Institute Energy Saving Device Development Group, also Known as Thin-Film Electronics Laboratory ―――――――――――――――― Tsubasa Matsumoto 38 Introduction of Nanoelectronics Laboratory (Nohira Group) at Tokyo City University ―――――――――――――――――――――――――――――――――――――――――――――― Reito Wada 
 Conference Reports 40 The 34th Diamond Symposium ――――――― Yoshiyuki Miyamoto, Takeshi Kondo, Masahiro Yano, Tomoki Machida and Atsushi Hirata 42 The 68th JSAP Spring Meeting 2021 ――――――――――――――― Hiroki Akasaka and Takayuki Iwasaki 
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