Wu Pingping, Wei Chunrong, Yang Wenjie, Lin Longnian, Pei Weihua, Wang Jingxia, Jiang Lei
CAS Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
Center of Material Science and Optoelectronics Engineering, School of Future Technologies, University of Chinese Academy of Sciences, Beijing 100049, China.
ACS Appl Mater Interfaces. 2021 Sep 1;13(34):41220-41230. doi: 10.1021/acsami.1c09531. Epub 2021 Aug 19.
Rewritable paper has greatly promoted the sustainable development of society. However, the hydrophilicity/lipophilicity of the poly(3,4-ethylenedioxythiophene) (PEDOT) film limits its application as the rewritable paper. Herein, we constructed a repeatable writing/erasing pattern on a PEDOT film (rewritable PEDOT paper) by combining wettability control, water-induced dedoping, and an electrochemical redox reaction. The treatment with a medium-polarity/high-volatility solvent (MP/HVS) adjusted the wettability of the PEDOT film (water contact angle increased from 6.5° to 146.2°), contributing to the formation of a hydrophobic writable substrate. The treatment with a high-polarity solvent (HPS) induced the dedoping of anions in the PEDOT chain, resulting in the film's color changed from blue to purple and serving as a writing process. The intrinsic electrochemical redox (elimination of color change by doping/dedoping of lithium ions in the PEDOT chain) of the PEDOT film enabled the erasing process. This writing/erasing process can be repeated at least 10 times. The patterned PEDOT film maintained excellent stability to standing diverse solvents (low-polarity solvent (LPS) and MP/HVS), high temperatures (350 °C), and irradiation of different light wavelengths (wavelengths of 365, 380, 460, 520, and 645 nm). Additionally, the conductivity of the PEDOT film was quantitatively measured (impedance: LPS, increased 8.84%; MP/HVS, decreased 6.67%; and HPS, increased 27.97%) by fabricating a micropatterned PEDOT electrode. This work will provide a method for the fabrication of PEDOT-based optoelectronic functional materials.
可重写纸极大地推动了社会的可持续发展。然而，聚（3,4 - 乙撑二氧噻吩）（PEDOT）薄膜的亲水性/疏水性限制了其作为可重写纸的应用。在此，我们通过结合润湿性控制、水诱导去掺杂和电化学氧化还原反应，在PEDOT薄膜（可重写PEDOT纸）上构建了可重复的书写/擦除图案。用中极性/高挥发性溶剂（MP/HVS）处理可调节PEDOT薄膜的润湿性（水接触角从6.5°增加到146.2°），有助于形成疏水的可书写基底。用高极性溶剂（HPS）处理会诱导PEDOT链中阴离子的去掺杂，导致薄膜颜色从蓝色变为紫色，作为书写过程。PEDOT薄膜的固有电化学氧化还原（通过PEDOT链中锂离子的掺杂/去掺杂消除颜色变化）实现了擦除过程。这种书写/擦除过程可以重复至少10次。图案化的PEDOT薄膜在多种溶剂（低极性溶剂（LPS）和MP/HVS）、高温（350°C）以及不同光波长（365、380、460、520和645 nm波长）的照射下保持了优异的稳定性。此外，通过制备微图案化的PEDOT电极对PEDOT薄膜的电导率进行了定量测量（阻抗：LPS增加8.84%；MP/HVS降低6.67%；HPS增加27.97%）。这项工作将为基于PEDOT的光电子功能材料的制备提供一种方法。
