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Structural colors have advantages compared with chemical pigments or dyes, such as iridescence, tunability, and unfading. Many studies have focused on developing the ability to switch ON/OFF the structural color; however, they often suffer from a simple and single stimulus, remaining structural colors, and target selectivity. Herein, we present regionally controlled multistimuli-responsive structural color switching surfaces. The key part is the utilization of a micropatterned DNA-hydrogel assembly on a single substrate. Each hydrogel network contains a unique type of stimuli-responsive DNA motifs as an additional cross-linker to exhibit swelling/deswelling via stimuli-responsive DNA interactions. The approach enables overcoming the existing limitations and selectively programming the DNA-hydrogel to a decrypted state (ON) and an encrypted state (OFF) in response to multiple stimuli. Furthermore, the transitions are reversible, providing cyclability. We envision the potential of our method for diverse applications, such as sensors or anticounterfeiting, requiring multistimuli-responsive structural color switching surfaces.
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http://dx.doi.org/10.1021/acs.nanolett.2c00197 | DOI Listing |
ACS Appl Mater Interfaces
November 2024
Department of Astronautical Science and Mechanics, Harbin Institute of Technology (HIT), Harbin 150080, People's Republic of China.
Soft actuators with biomimetic self-regulatory intelligence have garnered significant scientific interest due to their potential applications in robotics and advanced functional devices. We present a multistimuli-responsive actuator made from a carbon nitride/carbon nanotube (CN/CNTs) composite film. This film features a molecular switch based on reversible hydrogen bonds, whose asymmetric distribution endows the film with the ability to absorb water unevenly and convert molecular motion into macroscopic movement.
View Article and Find Full Text PDFSmall
September 2024
Institut de Science et d'Ingénierie Supramoléculaires, Université de Strasbourg & CNRS, 8 Allée Gaspard Monge, Strasbourg, 67000, France.
The optically tuneable nature of hybrid organic/inorganic heterostructures tailored by interfacing photochromic molecules with 2D semiconductors (2DSs) can be exploited to endow multi-responsiveness to the exceptional physical properties of 2DSs. In this study, a spiropyran-molybdenum disulfide (MoS) light-switchable bi-functional field-effect transistor is realized. The spiropyran-merocyanine reversible photo-isomerization has been employed to remotely control both the electron transport and wettability of the hybrid structure.
View Article and Find Full Text PDFInt J Pharm
June 2024
Department of Pharmacy-Pharmaceutical Sciences, University of Bari "Aldo Moro", 4, E. Orabona Street, 70125 Bari, Italy.
Inorg Chem
April 2024
College of Chemistry and Molecular Sciences, Henan University, Kaifeng 475001, China.
The fabrication of molecular crystalline materials with fast, multistimuli-responsive behavior and the construction of the corresponding structure-activity relationship are of extraordinary significance for the development of smart materials. In this context, three multistimuli-responsive functional metal-organic polyhedra (MOP), {[Dy(bcbp)(NO)(HO)]·Cl·(NO)·HO} (), {[Dy(bcbp)(HO)]Cl} (), and {[Eu(bcbp)(HO)]Cl·HO} (; bcbp = 1,1'-bis(4-carboxyphenyl)-4,4'-bipyridinium), were successfully prepared and characterized. All of the compounds exhibit rapid and reversible photochromic and electrochromic dual-responsive behaviors.
View Article and Find Full Text PDFMacromol Rapid Commun
June 2024
The State Key Laboratory of Chemical Oncogenomics, International Graduate School, Tsinghua University, Shenzhen, 518055, P. R. China.
Conjugated polymers (CPs) have been developed quickly as an emerging functional material with applications in optical and electronic devices, owing to their highly electron-delocalized backbones and versatile side groups for facile processibility, high mechanical strength, and environmental stability. CPs exhibit multistimuli responsive behavior and fluorescence quenching properties by incorporating azobenzene functionality into their molecular structures. Over the past few decades, significant progress has been made in developing functional azobenzene-based conjugated polymers (azo-CPs), utilizing diverse molecular design strategies and synthetic pathways.
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