DataVXChemistry of MaterialsPaper
journal article·2023-05-23

Macroscopic Actuation of Bisazo Hydrogels Driven by Molecular Photoisomerization

Chuang Li, Masoud Kazem-Rostami, James S.W. Seale, Shuailong Zhou, Samuel I. Stupp

Chemistry of Materials· Volume 35· Issue 10
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Source abstract

Abstract

Living organisms use the amplification of molecular motions over orders of magnitude to produce deformation, motion, and function on the macroscale. The design of artificial molecular machines that can mimic their biological counterparts in the production of such macroscopic actuation is of great interest. Here, we designed a polymerizable bisazobenzene-based molecular photoswitch that displays a highly directional geometrical transformation upon photoisomerization. When this photoswitch is incorporated into polymer networks as a cross-linker, its directional contraction and expansion drive the movement and rearrangement of polymer chains and amplifies these motions to the macroscale, resulting into a direct volume change and deformation of the bulk polymeric hydrogels. These photoswitchable hydrogels therefore mimic macroscopic biological motions such as muscular contraction and light-driven bending similar to phototropism. Furthermore, the use of this photoswitch to tune the macroscopic properties of hydrogels is in principle transferable to a variety of polymeric systems. This work develops a clear connection between molecular motion and macroscopic actuation, providing a platform to investigate this relationship further.
Source: openalex_inverted_index · Quality: baseline

Research context

Polymers

OpenAlex topics: Photochromic and Fluorescence Chemistry · Photoreceptor and optogenetics research · Supramolecular Self-Assembly in Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

CAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China

USDA, ARS, Eastern Regional Research Center, 600 East Mermaid Lane, Wyndmoor, Pennsylvania, 19038, United States

Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States

Center for Bio-Inspired Energy Science, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States

Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, Illinois 60208, United States

Department of Biomedical Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States

Department of Medicine, Northwestern University, 676 North St. Clair Street, Chicago, Illinois 60611, United States

Funding

University of Science and Technology of China · Basic Energy Sciences · Northwestern University · Natural Science Foundation of Anhui Province

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