Asymmetric D–A–D′ Scaffold inducing distinct mechanochromic luminescence

Yang, Hui; Fu, Zhiyuan; Wang, Qianqian; Liu, Haichao; Zhou, Jianwei; Wang, Kai; Wu, Xiugang; Yang, Bing; Zou, Bo; Zhu, Weiguo

doi:10.1039/d1ma00296a

Cited by 111 publications

(143 citation statements)

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“…[ 35 ] Hydrogels with an extracellular‐matrix‐like structure are considered as the potential and ideal bioengineered patches due to their excellent adjustability for multifunctional platforms. However, many anti‐adhesion hydrogels are prone to highly swelling in the internal wet environment, [ 36–38 ] and present obvious macroscopic deformation, which is not conducive to the tension‐free repair of soft tissues. Therefore, simultaneously achieving the properties of anti‐deformation, anti‐adhesion, and pro‐healing on a single hydrogel is the key to the successful application of hydrogel materials in the field of soft‐tissue defect repair.…”

Section: Introductionmentioning

confidence: 99%

Peritoneum‐Inspired Janus Porous Hydrogel with Anti‐Deformation, Anti‐Adhesion, and Pro‐Healing Characteristics for Abdominal Wall Defect Treatment

et al. 2022

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layers has attracted remarkable attention in recent years for surgical challenge and undesirable treatment outcomes. The destruction of the muscular layer is difficult to be sutured and injury of the serosal membrane could induce obvious viscera adhesion. [5,6] In the past few decades, tension-free repair operation is recommended as the standard treatment for soft-tissue defects like abdominal wall defects, in which different types of patches have been widely used. [1,[7][8][9] Traditional synthetic meshes with high strength, light weight, and anti-deformation (e.g., polypropylene (PP) and polyester meshes) have been widely used for tension-free repair of soft-tissue defects. But these meshes could result in severe visceral adhesion and undesirable wound healing, because of an obvious foreign body reaction (Figure 1a). [10][11][12] One of the most common approaches to solve the problem of visceral adhesion is to develop composite patches with anti-adhesion barriers. [9,13] For example, Parietex composite (PCO) mesh has been successfully designed to prevent visceral adhesion by coating an anti-adhesive collagen-based barrier on polyester mesh. [14,15] Nevertheless, these polyester or PP-based composite meshes could cause undesirable wound healing, due to their inherent unsatisfied inflammation response and lack of suitable microstructure for cells to migrate and grow. [16,17] Moreover, the collagen-based barrier would swell and cause deformation of composite meshes in an abdominal wet environment [18] (Figure 1b). Currently, the Implantable meshes used in tension-free repair operations facilitate treatment of internal soft-tissue defects. However, clinical meshes fail to achieve anti-deformation, anti-adhesion, and pro-healing properties simultaneously, leading to undesirable surgery outcomes. Herein, inspired by the peritoneum, a novel biocompatible Janus porous poly(vinyl alcohol) hydrogel (JPVA hydrogel) is developed to achieve efficient repair of internal soft-tissue defects by a facile yet efficient strategy based on top-down solvent exchange. The densely porous and smooth bottom-surface of JPVA hydrogel minimizes adhesion of fibroblasts and does not trigger any visceral adhesion, and its loose extracellular-matrix-like porous and rough top-surface can significantly improve fibroblast adhesion and tissue growth, leading to superior abdominal wall defect treatment to commercially available PP and PCO meshes. With unique anti-swelling property (maximum swelling ratio: 6.4%), JPVA hydrogel has long-lasting anti-deformation performance and maintains high mechanical strength after immersion in phosphate-buffered saline (PBS) for 14 days, enabling tolerance to the maximum abdominal pressure in an internal wet environment. By integrating visceral anti-adhesion and defect pro-healing with anti-deformation, the JPVA hydrogel patch shows great prospects for efficient internal soft-tissue defect repair.

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Section: Introductionmentioning

confidence: 99%

Peritoneum‐Inspired Janus Porous Hydrogel with Anti‐Deformation, Anti‐Adhesion, and Pro‐Healing Characteristics for Abdominal Wall Defect Treatment

et al. 2022

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“…Detectivity calculated by the noise current was almost the same with that calculated by the dark current indicating that the shot noise dominated in the device under −3 V bias. [ 31 ]…”

Section: Resultsmentioning

confidence: 99%

Achieving Photomultiplication in Dye‐Sensitized Narrowband Photodetectors by Electron Injection through a Thin Hole‐Transporting Layer

Zhang

Feng

et al. 2022

Advanced Optical Materials

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Narrowband photodetectors (NBPDs) that response to light with specific wavelength are attractive in imaging fields. Organic materials meet the demand of NBPDs well as active layer due to their tunable and the narrowband‐absorption properties. However, the responsivity is generally low caused by the hard exciton diffusion as well as severe recombination. Herein, a narrowband‐absorption BODIPY dye is synthetized and applied in vertical‐structural NBPDs as sensitizer bonding with the mesoporous titanium dioxide (mp‐TiO2). The close bonding between BODIPY dyes and mp‐TiO2 effectively enhances the dissociation of excitons. Importantly, the NBPDs present high photomultiplication, the first observation in such dye‐sensitized devices, which is due to the electron injection induced by a thin layer of Spiro‐OMeTAD covered on the hump parts of mp‐TiO2. The NBPDs exhibit high external quantum efficiency (EQE) of 534% at 510 nm with a full‐width at half‐maximum (FWHM) of 45 nm, a low dark current of 7.0 × 10‐5 mA cm‐2, and a high detectivity (D*) of 1.5 × 1013 cm Hz1/2 W‐1 (Jones) at −3 V. Besides, the devices own response speed within several milliseconds and excellent stability. The work proposes a strategy to fabricate photomultiplication‐type NBPDs by using intrinsic narrowband‐absorption dyes as active layer.

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“…Several significant parameters can be easily derived from this experimental result (Characteristic J−V curve), which leads to conclusions about the potentiality of the substance in terms of photo‐electrochemistry. Photosensitivity (P) is defined as the ratio of photocurrent output (difference in current density under light to dark, J light ‐ J dark ) to that of in the dark ( J dark ), whereas another key parameter, photoresponsitivity (R) is defined as ratio of photocurrent density output ( J light −J dark ) to the power of incident light irradiation ( P in ) at a particular wavelength [42–44]. Both are expressed according to the equations given below, respectively

true P = \frac{J_{l i g h t} - J_{d a r k}}{J_{d a r k}}

true R = \frac{J_{l i g h t} - J_{d a r k}}{P_{i n}}

…”

Section: Conceptual Understanding Of Mechanism In Polymer‐based Photo...mentioning

confidence: 99%

Polymer Based Functional Materials: A New Generation Photo‐active Candidate for Electrochemical Application

2022

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This article reviews the successive development of photo-assisted electrochemical performances using functionalized polymer materials. The photoelectrochemical technologies have already been well-established as a major tool for generating renewable energy harvesting solar power. In this regard, the research on the generation of new photoactive polymer supported units has drawn remarkable attention to improve the power conversion output and build up low-cost advanced devices. So, starting from fundamental working principle, we have tried to overview comprehensively the key features of most of these studies, which involve the tactical schemes behind the appropriate selection of different substituents to functionalize the polymer skeleton to achieve an optimal bandgap, challenges faced specially in the index of performance in post synthetic phase, the possible routes to overcome the hurdle, so that it can harvest photons matched with the solar spectrum and of course their relevance in the broad range of application window. Apart from photovoltaic solar cell application, the idea has been logically extended to cover highly selective photoelectrochemical sensing devices,where we have disclosed briefly the role of polymers in designing innovative biosensors, the trend of development along with specific illustrative examples, and some of their successful utilization in real time assay. The overall description is entirely focused on how these strategies have emerged from the background concepts and finally shaped to a viable and significant outcome.

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Asymmetric D–A–D′ Scaffold inducing distinct mechanochromic luminescence

Abstract: Mechanochromic luminescence (MCL) materials have a high requirement in high-tech applications such as pressure sensors and data storage. Nevertheless, the diversity of these emitters was still rather restricted owing to...

Cited by 111 publications

References 68 publications

Peritoneum‐Inspired Janus Porous Hydrogel with Anti‐Deformation, Anti‐Adhesion, and Pro‐Healing Characteristics for Abdominal Wall Defect Treatment

Peritoneum‐Inspired Janus Porous Hydrogel with Anti‐Deformation, Anti‐Adhesion, and Pro‐Healing Characteristics for Abdominal Wall Defect Treatment

Achieving Photomultiplication in Dye‐Sensitized Narrowband Photodetectors by Electron Injection through a Thin Hole‐Transporting Layer

Polymer Based Functional Materials: A New Generation Photo‐active Candidate for Electrochemical Application

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