The complex correlation between current density and pore density based on non-SCR effects |
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| Institution: | 1. State Key Laboratory of Transducer Technology, National Key Laboratory of Microsystem Technology, Shanghai Institute of Microsystem and Information, Chinese Academy of Sciences, Shanghai 200050, China;2. Graduate School of Chinese Academy of Sciences, Beijing, China;1. College of Food Science and Technology, Henan University of Technology, Zhengzhou, Henan 450052, China;2. Key Laboratory of Plant Resources Conservation and Sustainable Utilization, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China;3. Food Science and Technology Programme, Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore;4. National University of Singapore (Suzhou) Research Institute, 377 Lin Quan Street, Suzhou Industrial Park, Suzhou, Jiangsu 215123, China;5. Department of Food Science and Technology, College of Agriculture & Biology, Shanghai Jiao Tong University, 800 Dongchuan Rd., Minhang, Shanghai 200030, China;1. School of Medicine, Zhejiang University City College, Hangzhou, 310015, China;2. College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China;3. State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China;4. University of Chinese Academy of Sciences, Beijing, 100049, China;5. Department of Pharmacy, Shaoxing TCM Hospital Affiliated to Zhejiang Chinese Medical University, Shaoxing, 312000, China;6. School of Pharmaceutical Science, Jiangnan University, Wuxi, 214122, China;7. Zhongshan Institute for Drug Discovery, Shanghai Institute of Metria Medica, Chinese Academy of Sciences, Guangdong, 528400, China;8. School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, 310000, China |
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| Abstract: | The controllability of pore density and diameter is critical for emerging applications, e.g., non-lithographic photonic-crystal formation; however pore density and diameter could either increase or decrease self-orderedly with enhanced current density. In this letter, similar paradoxical phenomena were demonstrated; the etch rate as a function of field strength was evidenced and interpreted in light of current-burst-model. Based on a hybrid of SCR (space charge region) and breakdown effects, a semi-quantitative model was established in order to disentangle the paradox: such a model could also potentially serve as a design reference for various applications as far as breakdown comes into play. The paradox was finally found to be dominated by physics on patterned samples. |
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