Functional PDMS Elastomers: Bulk Composites, Surface Engineering, and Precision Fabrication

Advanced Science, Год журнала: 2023, Номер 10(34)

Опубликована: Окт. 9, 2023

Abstract Polydimethylsiloxane (PDMS)—the simplest and most common silicone compound—exemplifies the central characteristics of its class has attracted tremendous research attention. The development PDMS‐based materials is a vivid reflection modern industry. In recent years, PDMS stood out as material choice for various emerging technologies. rapid improvement in bulk modification strategies multifunctional surfaces enabled whole new generation devices, facilitating, even transforming enormous applications, including flexible electronics, superwetting surfaces, soft actuators, wearable implantable sensors, biomedicals, autonomous robotics. This paper reviews latest advances field functional materials, with focus on added functionality their use programmable smart devices. Recent breakthroughs regarding instant crosslinking additive manufacturing are featured, exciting opportunities future highlighted. review provides quick entrance to this rapidly evolving will help guide rational design next‐generation

Язык: Английский

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Bioprinting microporous functional living materials from protein-based core-shell microgels

Nature Communications, Год журнала: 2023, Номер 14(1)

Опубликована: Янв. 19, 2023

Abstract Living materials bring together material science and biology to allow the engineering augmenting of living systems with novel functionalities. Bioprinting promises accurate control over formation such complex through programmable deposition cells in soft materials, but current approaches had limited success fine-tuning cell microenvironments while generating robust macroscopic morphologies. Here, we address this challenge use core-shell microgel ink decouple from structural shell for further processing. Cells are microfluidically immobilized viscous core that can promote both microbial populations mammalian cellular spheroids, followed by interparticle annealing give covalently stabilized functional scaffolds controlled microporosity. The results show strategy mitigates leakage affording a favorable environment culture. Furthermore, demonstrate different consortia be printed into range applications. By compartmentalizing separate microgels, collective bioprocessing capability scaffold is significantly enhanced, shedding light on strategies augment capabilities.

Язык: Английский

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3D printing hydrogel with homogeneous structural color induced by ZnS colloidal spheres for customized multi-channel spatial information encryption

Journal of Colloid and Interface Science, Год журнала: 2025, Номер 684, С. 531 - 539

Опубликована: Янв. 10, 2025

Язык: Английский

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Multifunctional Injectable Hydrogel Microparticles Loaded with miR‐29a Abundant BMSCs Derived Exosomes Enhanced Bone Regeneration by Regulating Osteogenesis and Angiogenesis

Small, Год журнала: 2023, Номер 20(16)

Опубликована: Ноя. 28, 2023

Abstract The study investigated whether both the osteogenic and angiogenic potential of Exos (Exosomes) can be enhanced by overexpression exosomal miRNA (microRNA) to confirm loaded in HMPs (Hydrogel microparticles) exert long‐term effects during new bone formation. BMSCs are successfully obtained. In vitro vivo experiments confirmed that HDAC4 (Histone deacetylase 4) is inhibited miR‐29a accompanied upregulation RUNX2 (Runt‐related transcription factor 2) VEGF (Vascular Endothelial Growth Factor), thereby enhancing capabilities. HMP@Exo system synthesized from HB‐PEGDA (Hyperbranched Poly Ethylene Glycol Diacrylate)‐ SH‐HA (Sulfhydryl‐Modified Hyaluronic Acid)‐containing using a microfluidic technique. HMP surface modified with RGD (Arg‐Gly‐Asp) peptides enhance cell adhesion. demonstrated good injectability, remarkable compatibility, outstanding adhesion properties, slow degradation capacity, sustained release Agomir‐29a‐Exos (Exosomes derived Agomir‐29a transfected BMSCs) proliferation migration HUVECs (Human Umbilical Vein Cells) while promoting osteogenesis angiogenesis. Overall, findings demonstrate effectively maintain activity half‐life Exos, (microRNA‐29a). injectable provides an innovative approach for accelerating fracture healing coupling

Язык: Английский

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Reconfigurable Photonic Crystal Reversibly Exhibiting Single and Double Structural Colors

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(52)

Опубликована: Окт. 20, 2023

Unlike absorption-based colors of dyes and pigments, reflection-based photonic crystals, so called "structural colors", are responsive to external stimuli, but can remain unfaded for over ten million years, therefore regarded as a next-generation coloring mechanism. However, it is challenge rationally design the spectra structural colors, where one structure gives only reflection peak defined by Bragg's law, unlike those colors. Here, we report reconfigurable crystal that exhibits single-peak double-peak This composed colloidal nanosheet in water, which spontaneously adopts layered with single periodicity (407 nm). After temperature-gradient treatment, segregates into two regions shrunken (385 nm) expanded (448 periodicities, thus double peaks blue- red-shifted from original one, respectively. Notably, transition between states reversible.

Язык: Английский

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A magnetically responsive photonic crystal of graphene oxide nanosheets

Nanoscale, Год журнала: 2024, Номер 16(16), С. 7908 - 7915

Опубликована: Янв. 1, 2024

In this work, we systematically investigated the magnetically responsive behavior of a photonic crystal consisting graphene oxide nanosheets and water, leading to switching its structural color by applying magnetic field.

Язык: Английский

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Photonic Hydrogel Sensing System for Wearable and Noninvasive Cortisol Monitoring

ACS Applied Polymer Materials, Год журнала: 2023, Номер 5(9), С. 7079 - 7089

Опубликована: Авг. 3, 2023

Wearable biosensors have emerged as an increasingly important tool in personalized health monitoring and are even envisioned to renovate the traditional centralized diagnosis method home diagnosis. Here, we introduce two types of wearable devices with sandwich structures that utilize photonic crystal hydrogel structural color for detection cortisol human sweat. The integrated exploit molecular imprinting antibody–antigen competitive binding techniques, which tailored different storage requirements use. By using a smart phone analyze change hydrogel, dynamic fluctuations endogenous sweat during diurnal cycles were monitored. limit reached nmol/L level, meeting body fluids. Furthermore, Trier Social Stress Test exercise specific periods time used verify relevance stress biomarker sensitivity developed biosensors. development noninvasive naked eye this study offers approach self-management.

Язык: Английский

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Highly Efficient Self‐Assembly of Metallacages and Their Supramolecular Catalysis Behaviors in Microdroplets

Angewandte Chemie International Edition, Год журнала: 2023, Номер 62(27)

Опубликована: Март 24, 2023

Developing a new strategy to improve the self-assembly efficiency of functional assemblies in confined space and construct hybrid materials is significant fascinating endeavor. Herein, we present highly efficient for achieving supramolecular well-defined metallacages microdroplets through continuous-flow microfluidic devices. The high versatility this approach are demonstrated by generation five representative different solvents containing water, DMF, acetonitrile, methanol few minutes with nearly quantitative yields, contrast yields obtained hour-scale reaction time batch reactor. A ring-opening catalytic was selected as model exploring catalysis microdroplets, whereby yield enhanced 2.22-fold compared that same This work illustrates promising systems.

Язык: Английский

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Controllable Synthesis of Monodispersed Zirconia Submicrospheres Based on Oligomer Aggregation Mechanism for Enhanced Scattering Manipulation

Small Methods, Год журнала: 2025, Номер unknown

Опубликована: Март 4, 2025

Oxide submicrospheres with a high refractive index are essential for enhancing scattering and manipulating light transmission at submicrometer scale in photonic applications. However, achieving precise control over the diameter monodispersity of transition metal oxide remains challenging, due to unclear formation mechanism lack effective synthesis strategy. Here, nonclassical oligomer aggregation controllable monodispersed ZrO2 (ZS) mean diameters ranging from 0.263 1.295 µm polydispersity indices almost below 0.1 is presented. Oligomers identified as fundamental building units, their behavior governs ZS. Moreover, regulation homogeneous achieved through introduction alkanoic acids amines. This adjustment, driven by steric effect, hydrogen bonding strength, reaction priority, quantity, enables spherical morphology, monodispersity, diameter. Compared SiO2 polystyrene submicrospheres, ZS exhibits enhanced, tunable superior chemical stability. The findings suggest that mechanism, along its strategy, provides new framework synthesizing broadening range materials available

Язык: Английский

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Printable Photonic Materials and Devices for Smart Healthcare

Advanced Materials, Год журнала: 2025, Номер unknown

Опубликована: Март 5, 2025

Photonic materials possess tunable optical properties and have been widely utilized for healthcare applications. These enable the detection of physical physiological bio-signals via modulated output characteristics, such as wavelength shifts, fluorescence emission, light scattering. When further synthesized into functional photonic inks, multimodal devices epidermal, minimally invasive, implantable bio-sensing can be constructed in facile printable manners. This review first introduces different geometries their unique properties. To feasible fabrication multi-functional biosensing versatile platforms, synthesis inks as-printed are then illustrated. Subsequently, advances breakthroughs to construct integrated systems wearable applications displayed, especially sensing facilitate personalized remote healthcare. Finally, challenges achieving mechanical stability, eliminated degradation, enhanced biocompatibility dynamic biological environments, scalable production discussed, along with prospects toward reliable intelligent

Язык: Английский

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