Reversible Writing/Re‐Writing Polymeric Paper in Multiple Environments

Abstract

Compared with traditional paper relying on cellulose, the polymeric paper written by light can satisfy more multi‐environmental stability and reusability for sustainable development. Herein, proposed for the first time, a novel multifunctional polymeric paper with a patch‐sewing structure is designed, presenting the reversible writing/re‐writing performance. Meanwhile, a series of Fe‐based oxides with various submicron structures inherited from metal–organic framework templates are reported, in which the optimum one exhibited 95.04% absorbance from the finite difference time domain simulation and realized photothermal conversion instantaneously (soaring to 300 °C within 38 s). Given the distinguished mechanical properties (the tensile strength of 21.34 MPa and elongation at break of 546.06%), shape‐memory ability, and multi‐environmental stability, the composites are perfect for information recording. Due to the addition of the liquid crystal phase serving as the ink on the paper, the stress concentration and destruction can be recorded on the surface while it can recover to the initial situation by near‐infrared irradiation. Moreover, the remote writing with precision triggered by a focused light source can be achieved in multiple situations (air, water, and ice), which paved the way for the next generation of paper, especially in extreme conditions like deep‐water or aerospace.

Supramolecular DNA Photonic Hydrogels for On-Demand Control of Coloration with High Spatial and Temporal Resolution

“…On-demand and in situ assembly of PC structures in hydrogels has many potential applications. One of these applications is for on-demand writing/erasing, which was described recently. − To demonstrate this potential application using our approach, we conducted a series of writing/erasing tests in the DNA hydrogel samples. As described above, photothermal heating can trigger a local melting of the DNA, thus minimizing the energy barrier of the MNP translocation and allowing for on-demand assembly.…”

Paper‐Structure Inspired Multiresponsive Hydrogels with Solvent‐Induced Reversible Information Recording, Self‐Encryption, and Multidecryption

“…[8] Over the last few decades, various approaches have emerged for information encryption and decryption/protection, such as holographic anti-counterfeiting, multidimensional security codes, stimulus-response, and fluorescence recognition. [8][9][10][11] For example, Tang et al [12] designed an aggregation-induced emission (AIE) supramolecular hydrogel which exhibited adhesiveness and multiple fluorescent colors. The storage capacity of this system for large amounts of information was demonstrated based on the code methods under UV light irradiation, showing 1D, 2D, and 3D information recording capabilities.…”

Light‐Induced Topological Patterning toward 3D Shape‐Reconfigurable Origami

“…Shape-reconfigurable materials that significantly change their structure and size can potentially impact modern engineering applications, such as mechanical memory devices, [1][2][3] mechanical metamaterials, [4][5][6] bio-inspired robotics, [7][8][9] microelectronic plasticity-induced deformation contributes to a permanent origami deployment. [28,29] Despite this plasticity allowing manipulating plastically to form a drastically different origami structures, it is largely inapplicable for intrinsically guiding deformation in complex 3D origami without mold.…”