标题: Electrical Writing Induced Covalent Cross-Linking on Hydrogel for Multidimensional Structural Information Storage

作者: Yang, C (Yang, Chen); Shi, XW (Shi, Xiaowen); Qi, LH (Qi, Luhe); Zhu, XY (Zhu, Xinyi); Tong, J (Tong, Jun); Deng, HB (Deng, Hongbing); Du, YM (Du, Yumin)

来源出版物: ACS APPLIED MATERIALS & INTERFACES 卷: 13 期: 30 页: 36538-36547 DOI: 10.1021/acsami.1c09548 出版年: AUG 4 2021

摘要: The storage of dynamic information in hydrogel is extremely interesting due to the reprogrammable and responsive features of hydrogel. Here, we report that structural information can be stored in polysaccharide hydrogel by electrically induced covalent cross-linking, and the imbedded information can be retrieved by different means (dye adsorption, protonation of chitosan, and acid dissolution). Taking the advantage of diffusible feature of hydrogel, OH- was generated from the contacting area of the electrode and controllably diffused by electrical writing, thus the high pH domain (pH similar to 10) triggered covalent cross-linking of the hydrogel. The written area exhibits different micromorphology, chemical properties, and pH sensitivity, allowing dynamic 2D and 3D information to be stored and read when necessary. This work demonstrates the use of stable electrical inputs to store dynamic structural information in a biopolymer-based hydrogel and how the chemical and physical varies allow eye recognition to the embedded information.

作者关键词: chitosan; epichlorohydrin; electrochemically cross-linking; hydrogel; structural information

地址: [Yang, Chen; Shi, Xiaowen; Qi, Luhe; Zhu, Xinyi; Tong, Jun; Deng, Hongbing; Du, Yumin] Wuhan Univ, Hubei Biomass Resource Chem & Environm Biotechnol, Hubei Engn Ctr Nat Polymers Based Med Mat, Sch Resource & Environm Sci,Hubei Int Sci & Techn, Wuhan 430079, Peoples R China.

通讯作者地址: Shi, XW (通讯作者)，Wuhan Univ, Hubei Biomass Resource Chem & Environm Biotechnol, Hubei Engn Ctr Nat Polymers Based Med Mat, Sch Resource & Environm Sci,Hubei Int Sci & Techn, Wuhan 430079, Peoples R China.

电子邮件地址: shixw@whu.edu.cn

影响因子：9.229