Review on Photo-Responsive Polymeric Interfaces in Biomedical Applications

Kollarigowda, Ravichandran H.

doi:10.4028/www.scientific.net/jbbbe.27.44

Cited by 2 publications

(3 citation statements)

References 48 publications

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“…As a clean source, light offers remote and localized control, which is beneficial to the dynamic and accurate regulation over materials. − Until now, dynamic interfacial regulation by light has been realized through various photoresponsive materials, including photosensitive inorganic oxides, − small molecular dyes (azobenzene, spiropyran, stilbene, etc. ), and their related polymers. , However, issues such as slow response or limited interfacial property changes during light regulation still hinder their potential applications.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Interfacial Regulation by Photodeformable Azobenzene-Containing Liquid Crystal Polymer Micro/Nanostructures

Zhu

Sun

et al. 2020

Langmuir

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Photoresponsive materials offer local, temporal, and remote control over their chemical or physical properties under external stimuli, giving new tools for interfacial regulation. Among all, photodeformable azobenzene-containing liquid crystal polymers (azo-LCPs) have received increasing attention because they can be processed into various micro/nanostructures and have the potential to reversibly tune the interfacial properties through chemical and/or morphological variation by light, providing effective dynamic interface regulation. In this feature article, we highlight the milestones in the dynamic regulation of different interfacial properties through micro/nanostructures made of photodeformable azobenzene-containing liquid crystal polymers (azo-LCPs). We describe the preparation of different azo-LCP micro/nanostructures from the aspects of materials and processing techniques and reveal the importance of mesogen orientation toward dynamic interfacial regulation. By introducing our recently developed linear azo-LCP (azo-LLCP) with good mechanical and photoresponsive performances, we discuss the challenge and opportunity with respect to the dynamic light regulation of two- and three-dimensional (2D/3D) micro/nanostructures to tune their related interfacial properties. We have also given our expectation toward exploring photodeformable micro/nanostructures for advanced applications such as in microfluidics, biosensors, and nanotherapeutics.

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Section: Introductionmentioning

confidence: 99%

“…), and their related polymers. 36,37 However, issues such as slow response or limited interfacial property changes during light regulation still hinder their potential applications.…”

Section: ■ Introductionmentioning

confidence: 99%

Dynamic Interfacial Regulation by Photodeformable Azobenzene-Containing Liquid Crystal Polymer Micro/Nanostructures

Zhu

Sun

et al. 2020

Langmuir

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“…Polymeric materials that undergo large reversible physical or chemical modifications in response to surrounding changes are known as smart stimulus-responsive polymers and are very promising in many fields. − Compared with other stimuli, light stimuli are particularly impressive because they have several advantages, such as process ease and low chemical contamination. − Furthermore, it is a straightforward process with great accuracy. In particular, azobenzene-containing polymeric materials may go through trans–cis photoisomerization upon radiation with the appropriate wavelength and can modify the molecular movement within the material and on its surface. ,− By leveraging this chemistry, binding this stimulus material with eco-friendly and low-cost materials, like cellulose, would lead to a new platform for the oil/water purification field.…”

Section: Introductionmentioning

confidence: 99%

Stimulus-Responsive Biopolymeric Surface: Molecular Switches for Oil/Water Separation

Kollarigowda

Harisha

Cheng

2019

ACS Appl. Bio Mater.

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In this work, we fabricated a stimulusresponsive biopolymeric material and demonstrated the reversible character of a hydrophilic/hydrophobic interface upon exposure to UV light. Importantly, this stimulusresponsive material exhibited excellent features in an oil/ water separation system. Cellulose was functionalized on both sides of the surface with a dopamine polymer and further modified with an azobenzene-fluorosilane material. Azobenzene can alter the properties of a material via an isomerization effect (trans−cis) upon exposure to UV light. Initially, the azobenzene-fluorosilane material was in a hydrophobic state; the contact angle was over 130°; and absorption performance with various organic solvents showed there to be high levels of extractive activity and outstanding reusability. When we exposed the material to UV light, the surface changed to that of a hydrophilic nature, and this phenomenon was influenced by the azobenzene chemistry of folding and unfolding of an azobenzene-fluorosilane molecule. Significantly, this phenomenon is a reversible, reusable, and eco-friendly material. Furthermore, dopamine polymers could block organic material, bacteria, and fungi, and this surface can be used for wastewater purification. Therefore, we foresee that the stimulus-responsive surface of biopolymeric material could result in a different direction in the oil/water purification fields.

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Review on Photo-Responsive Polymeric Interfaces in Biomedical Applications

Cited by 2 publications

References 48 publications

Dynamic Interfacial Regulation by Photodeformable Azobenzene-Containing Liquid Crystal Polymer Micro/Nanostructures

Dynamic Interfacial Regulation by Photodeformable Azobenzene-Containing Liquid Crystal Polymer Micro/Nanostructures

Stimulus-Responsive Biopolymeric Surface: Molecular Switches for Oil/Water Separation

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