We will celebrate the 30th anniversary of Sensors and Materials in 2018.
Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
To submit your manuscript, please use our Online Manuscript Submission System
To subscribe to Sensors and Materials, please contact us.
Sensors and Materials
is covered by Science Citation Index Expanded
(Thomson Reuters), Scopus
(Elsevier), and other databases.
Sensors and Materials
Bunkyo-ku, Tokyo 113-0022, Japan
Cover of latest issue
provides English proofreading, translation, and recording services for your submissions and presentations. The quality of the services is highly regarded by many researchers in Japan and other Asian countries.
(proofreading and recording)
The Art of Writing Scientific Papers
(How to write scientific papers)
Sensors and Materials, Volume 29, Number 8 (2017)
Copyright(C) MYU K.K. All Rights Reserved.
Online Published: August 16, 2017
Current Saturation Due to Strong Field Concentration into Local Thin Area in Low-density Polyethylene Sheet under Stepwise Increasing DC Voltage
Kazunori Kadowaki, Ryohei Ochi, and Ryotaro Ozaki
(Received December 6, 2016; Accepted June 9, 2017)
Keywords: current saturation, SCLC, field distortion, polyethylene, stepwise increasing voltage
Generally, space charge formation in dielectrics subjected to DC voltage results in the enhancement of a conduction current called space-charge-limited current (SCLC). In this study, we find an interesting phenomenon that the conduction current for a low-density polyethylene (LDPE) sheet does not increase with increasing applied voltage even though a large number of space charges are accumulated in its bulk. Simultaneous measurements of the conduction current and space charge distribution are carried out for a 150-μm-thick additive-free LDPE between a semiconduction anode and an aluminum-evaporated cathode. Under a low applied field of below 0.6 MV/cm, the current is proportional to the square of the applied field because the maximum field strength in LDPE becomes higher than the mean applied field strength due to space charge formation in the LDPE bulk. Both the space charge distributions and the corresponding field distributions obtained by the simultaneous measurement roughly agree with the theoretical distributions based on the SCLC model. By increasing the applied field, however, the steady-state current saturates although a large number of positive space charges are accumulated in the LDPE bulk. We confirm that the steady-state current is restricted when a large number of frozen positive charges in front of the cathode are formed causing the strong field enhancement at a limited local thin area. These results imply that the carrier mobility at the local thin area was reduced by the excess field enhancement.
Corresponding author: Kazunori Kadowaki
Forthcoming Regular Issues
Forthcoming Special Issues
Special Issue on Recent Progress in the Optical Bio/Chemical Sensors
Guest editor, Yoshiaki Nishijima (Yokohama National University)Call for paperSpecial Issue on the 10th International Conference on Sensing Technology (ICST 2016)
Guest editor, Ruqiang Yan (Southeast University)Conference websiteCall for paper3rd Special Issue on the Workshop on Next-Generation Front-Edge Optical Science Research
Guest editor, Hidehito Nanto (Kanazawa Institute of Technology)Special Issue on Advanced Sensing Technology for Smart Manufacturing
Guest editor, Chien-Hung Liu (National Chung Hsing University)Special Issue on International Conference on BioSensors, BioElectronics, BioMedical Devices, BioMEMS/NEMS and Applications 2016 (Bio4Apps 2016)
Guest editor, Dzung Dao (Griffith University)Call for paperSpecial Issue on Innovative and Intelligent Sensing Analysis and Experiment for Functional Materials
Guest editor, Cheng-Chi Wang (National Chin-Yi University of Technology)Conference websiteSpecial Issue on Retinal Prosthesis
Guest editor, Jun Ohta (Nara Institute of Science and Technology), Hiroyuki Tashiro (Kyusyu University), and Yasuo Terasawa (Nidek Co., Ltd.)Call for paperSpecial Issue Dedicated to Professor Toshitsugu Ueda for His Achievements
Guest editor, Satoshi Ikezawa (Waseda University) and Jinxing Liang (Southeast University)Special Issue on ICASI2017
Guest editor, Teen-Hang Meen (National Formosa University), Shoou-Jinn Chang National Cheng Kung University), and Stephen D. Prior (University of Southampton)Conference websiteCall for paperSpecial Issue on Open Collaboration for MEMS
Guest editor, Masayoshi Esashi (Tohoku University)Special Issue on the International Multi-Conference on Engineering and Technology Innovation 2017 (IMETI2017)
Guest editor, Wen-Hsiang Hsieh (National Formosa University)Conference websiteSpecial Issue on Internet of Things (IoT) and Applications for Improving Quality of Life
Guest editor, Hidetaka Nambo (Kanazawa University)Call for paperSpecial Issue on Materials, Devices, Circuits, Analytical Methods for Various Sensors (Selected Papers from ICSEVEN 2017)
Guest editor, Chien-Jung Huang (National University of Kaohsiung, Chi-Chih Liao (II-V Epiworks, Inc.), and Ja-Hao Chen (Feng Chia University)Conference websiteCall for paperSpecial Issue on Sensors and Materials for Cyber-Physical Applications
Guest editor, Pitikhate Sooraksa (King Mongkut’s Institute of Technology Ladkrabang)Call for paperSpecial Issue on Biosensing Materials and Engineering for Electrobiology
Guest editor, Toshiya Sakata (The University of Tokyo)Special Issue on Micro Energy Harvesting and Storing Technologies
Guest editor, Bin Yang (Shanghai Jiao Tong University)Call for paper