{"title":"","authors":"Jonathan D. Wells, and , Grace A. Belancik*, ","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":100230,"journal":{"name":"Chem & Bio Engineering","volume":"2 3","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":0.0,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/cbe.4c00162","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144344195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-03-26eCollection Date: 2025-04-24DOI: 10.1021/cbe.4c00177
Song Yang, Chenxi Qin, Zhizhi Zhang, Ming Zhang, Bin Li, Yanfei Ma, Feng Zhou, Weimin Liu
The rapid and reversible adhesion between solids is of great significance, particularly in fields such as biomedicine, intelligent machines, and bioelectronic sensors. Hydrogels, as soft materials, play a vital role in reversible adhesion. To achieve a wider range of applications, it is essential to enhance the intelligence of hydrogels. However, the preparation of reversible adhesive hydrogels with remote control, reversible adhesion, rapid response, and no residue remains a challenge in the field. Herein, we developed a light-controlled reversible adhesive hydrogel by integrating temperature-controlled reversible adhesion with the photothermal response capabilities of Fe3O4. The hydrogel can adhere/desorb reversibly under temperature control and allows for remote adhesion control using infrared light. Under infrared light irradiation, surface water causes carboxylic acid groups to migrate to the surface, thereby shielding the catechol groups. This results in insufficient adhesive groups at the interface to form interactions with opposing surfaces. Without infrared light irradiation, the adhesive functional groups are exposed, allowing interaction forces to form between the surface with the adhesion groups and the opposing surfaces. This smart hydrogel holds significant potential for future applications in wound dressings, wearable devices, and soft robots.
{"title":"Light-Controlled Adhesive Hydrogels for On-Demand Adhesion.","authors":"Song Yang, Chenxi Qin, Zhizhi Zhang, Ming Zhang, Bin Li, Yanfei Ma, Feng Zhou, Weimin Liu","doi":"10.1021/cbe.4c00177","DOIUrl":"https://doi.org/10.1021/cbe.4c00177","url":null,"abstract":"<p><p>The rapid and reversible adhesion between solids is of great significance, particularly in fields such as biomedicine, intelligent machines, and bioelectronic sensors. Hydrogels, as soft materials, play a vital role in reversible adhesion. To achieve a wider range of applications, it is essential to enhance the intelligence of hydrogels. However, the preparation of reversible adhesive hydrogels with remote control, reversible adhesion, rapid response, and no residue remains a challenge in the field. Herein, we developed a light-controlled reversible adhesive hydrogel by integrating temperature-controlled reversible adhesion with the photothermal response capabilities of Fe<sub>3</sub>O<sub>4</sub>. The hydrogel can adhere/desorb reversibly under temperature control and allows for remote adhesion control using infrared light. Under infrared light irradiation, surface water causes carboxylic acid groups to migrate to the surface, thereby shielding the catechol groups. This results in insufficient adhesive groups at the interface to form interactions with opposing surfaces. Without infrared light irradiation, the adhesive functional groups are exposed, allowing interaction forces to form between the surface with the adhesion groups and the opposing surfaces. This smart hydrogel holds significant potential for future applications in wound dressings, wearable devices, and soft robots.</p>","PeriodicalId":100230,"journal":{"name":"Chem & Bio Engineering","volume":"2 4","pages":"253-259"},"PeriodicalIF":0.0,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12035562/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144061263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Di Chen, Huijie Wang, Chujun Ni, Jingye Chen, Yujun Guo, Zhe Chen, Ning Zheng, Jingjun Wu, Hua Ren and Qian Zhao*,
Microlenses are the basis of diverse modern instruments, which demand for more flexible fabrication. Thermal reflowing after photolithography of non-cross-linked polymers is the most widely applied strategy for manufacturing final products or primary molds of microlenses with desired microcurvatures. However, this approach can commonly form only one specific curvature for the same precursor system, lacking manufacturing flexibility. Here we report the direct growth of microstructures with flexible control of the curvature after one-step photolithography. This method relies on spatial UV irradiation, which induces network rearrangements in a dynamically cross-linked hydrogel. Upon subsequent water swelling, the irradiated locations develop microstructures with tunable curvature controlled by the irradiation time. Following by a secondary ionic cross-linking, the hydrogels are mechanically strengthened for practical microlens replication. Consequently, microlens arrays with a roughness around 20 nm are rapidly molded from the hydrogel templates. Multiple focuses are uniformly projected on a targeted plane, indicating the fine imaging capability of the microlenses. Moreover, the focal lengths are facilely adjustable not only in a wide range but also in a spatially selective manner. Our growth strategy paves a versatile and efficient method for the flexible fabrication of functional optical devices.
{"title":"Light-Regulated Microstructure Growth of Dynamic Hydrogels for Flexible Manufacturing of Microlens Arrays","authors":"Di Chen, Huijie Wang, Chujun Ni, Jingye Chen, Yujun Guo, Zhe Chen, Ning Zheng, Jingjun Wu, Hua Ren and Qian Zhao*, ","doi":"10.1021/cbe.5c00007","DOIUrl":"10.1021/cbe.5c00007","url":null,"abstract":"<p >Microlenses are the basis of diverse modern instruments, which demand for more flexible fabrication. Thermal reflowing after photolithography of non-cross-linked polymers is the most widely applied strategy for manufacturing final products or primary molds of microlenses with desired microcurvatures. However, this approach can commonly form only one specific curvature for the same precursor system, lacking manufacturing flexibility. Here we report the direct growth of microstructures with flexible control of the curvature after one-step photolithography. This method relies on spatial UV irradiation, which induces network rearrangements in a dynamically cross-linked hydrogel. Upon subsequent water swelling, the irradiated locations develop microstructures with tunable curvature controlled by the irradiation time. Following by a secondary ionic cross-linking, the hydrogels are mechanically strengthened for practical microlens replication. Consequently, microlens arrays with a roughness around 20 nm are rapidly molded from the hydrogel templates. Multiple focuses are uniformly projected on a targeted plane, indicating the fine imaging capability of the microlenses. Moreover, the focal lengths are facilely adjustable not only in a wide range but also in a spatially selective manner. Our growth strategy paves a versatile and efficient method for the flexible fabrication of functional optical devices.</p>","PeriodicalId":100230,"journal":{"name":"Chem & Bio Engineering","volume":"2 6","pages":"350–357"},"PeriodicalIF":0.0,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12207276/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144546762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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