COMPOSITES PART B-ENGINEERING
·
2024
·
IF 12.7
Xiaoshuan Pan,Xiaofei Li,Chao Xiao,Xin Ding,Kang Zheng,Xianglan Liu,Meng Xue,Lin Chen,Yi Gong,Xingyou Tian,Xian Zhang
With the development of dynamic infrared camouflage technology, photothermal infrared camouflage has attracted researchers' attention due to its remote-control capability and fast response speed. However, lots of photothermal fillers for high temperatures will break the flexibility and transparency of the polymer. In this work, transparent photothermal infrared camouflage liquid metal microspheres/colorless polyimide (LM/CPI) films with light programming were fabricated. The polydopamine-coated LM microspheres endow CPI with excellent photothermal effect, achieving a wide range of infrared camouflage from room temperature to 390 °C. Furthermore, the glass transition, residual stress, and the different thermal expansion coefficients endow the LM/CPI film with light programming and light actuation capability. The LM/CPI film can mimic the bending of an arm and the opening and closing of a hook. Combining the light programming capability with the dynamic infrared camouflage ability of the LM/CPI film proposes an infrared camouflage strategy where the position of the camouflage film is changed through light programming while conducting infrared camouflage, thereby targeting the design of deceptive, false targets or altering the camouflaged area. Therefore, the LM/CPI films open up a new strategy for dynamic infrared camouflage, sketching a promising future for them in dynamic infrared camouflage.
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RENEWABLE ENERGY
·
2024
·
IF 9
Ting Li,Yuhao Tian,Jessica Nginyo,Daniela Iracelma Difuma Luis,Weijie Cai
Light-assisted thermocatalytic dry reforming of ethanol (EDR) utilizing the synergistic effect of photocatalysis and thermocatalysis is regarded as a promising route to convert greenhouse gas CO 2 into value-added chemicals. In this work, double-shell NiZnO x hollow microspheres (NiZnO x -M) were synthesized as light-harvesting catalyst to enhance EDR performance under mild conditions. The characterization results of UV–vis–NIR and Photoluminescence Spectroscopy (PL) indicated that the band gap energy of NiZnO x -M catalyst was narrower because of the smaller Ni nanoparticles , thereby broadening its optical response range especially in visible light. The strong absorbance of light could greatly improve the activation of ethanol/CO 2 and the gasification of carbon. With light irradiation, light could induce the transfer of photogenerated electron from semiconductor ZnO to active metal Ni, reducing the reaction energy barrier. Hence, NiZnO x -M catalyst showed superior photothermal catalytic activity along with good resistance capacity to coke accumulation and aggregation of active metal. Ethanol conversion was ca.2 times those obtained over NiZnO x -C prepared by conventional precipitation method. No obvious deactivation occurred after 100 h tests. This work provides some guidance for the design of high-performance photothermal catalyst to achieve the photo-thermal-chemical conversion of the greenhouse gases.
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ACS Applied Nano Materials
·
2024
·
IF 5.3
Jingke Yao,Xunjie Shang,Jiayi Wei,Liting Guo,Feifan Sheng,Nannan Shao,Limin Chen,Zhe Zhang,Yunlong Zhou,Wei Chen
Biofilm and multidrug-resistant bacteria limit therapy effects on bacteria keratitis. Hence, we developed an all-in-one strategy based on a photothermal trigger to combat multidrug-resistant bacteria and eradicate biofilm. In the nanoplatforms, BSA-Ag2Te nanoparticles (NPs) fabricated by a one-step synthesis approach were utilized as photothermal agents to generate low temperature (40–48 °C) and then modified with RGD (Arg-Gly-Asp) to increase the drug concentration and retention in the cornea. The heat generated from photothermal therapy can accelerate the Ag+ release. In addition, laser-triggered release of Ag+ can significantly increase the ROS content in the bacteria. This synergistic approach could effectively eradicate multidrug-resistant bacteria and biofilm by photothermal therapy (PPT) and the combination of Ag+ and ROS. Based on the synergistic treatment of PTT, Ag+, and ROS, BSA-Ag2Te@RGD NPs exhibited outstanding antibacterial effects on a mice MRSA-infected keratitis model. BSA-Ag2Te@RGD NPs will be promising candidates for applications of low-temperature PTT in bacterial keratitis treatments.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Shouzheng Jiao,Peng Cheng,Qian Li,Xiaonan Wang,Yufen Li,Zhongjun Cheng,Hua Lai,Yuyan Liu
Hypothesis Perfluorocarbon is commonly used as a coolant, chemical reaction carrier solvent, medical anti-hypoxic agents and blood substitutes. The realization of non-contact complex manipulation of perfluorocarbon liquids is urgently needed in human life and industrial production. However, most liquid-repellent interfaces are ineffective for the transport of ultra-low surface tension perfluorocarbon liquids, and struggle to maintain good durability due to unstable air or oil cushions in the surface. Therefore, preparing surfaces for stable non-contact complex manipulation of ultra-low surface tension droplets remains a challenge. Experiments In this paper, a novel solution, a photothermal responsive droplet manipulation surface based on polydimethylsiloxane brushes, has been reported. On this surface, droplets with different surface tensions (as low as 10 mN/m) can be efficiently manipulated through induced near-infrared light. Notably, this surface maintains its effectiveness after exposure to extreme anthropogenic conditions. Findings The interface effect between perfluorocarbon droplets and polydimethylsiloxane brushes by near-infrared light-induced was investigated in detail. In addition, ultra-low surface tension droplets demonstrate the ability to transport solid particles. The conductive droplets exhibit sophisticated manipulation realizing the controlled switching of smart circuits. This research opens up new possibilities for advancing the capabilities and adaptability of ultralow surface tension droplets in a range of applications.
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Materials Horizons
·
2025
·
IF 10.7
Yuxian Su,Tianfu Song,Li Liu,Shipeng Wen
In recent years, liquid-crystalline polymers containing azobenzene moieties that show phototunable glass transition temperatures, have been successfully used in adhesion, reversible mechanical actuation, athermal nano-imprinting, self-healing, energy storage, and other applications. Unfortunately, the physical principles and properties underlying the dynamic equilibrium behaviors when both trans and cis isomers are triggered simultaneously remain elusive, and experiments are challenging due to the difference in penetration depth between ultraviolet and visible light sources. Here, we develop a novel environmentally friendly adhesive with near-infrared (NIR) light-driven and reusability through the integration of highly efficient UV/Blue-emitting upconversion particles (UCNPs) and siloxane main-chain azobenzene molecular photoswitch, and achieve simultaneously bicolor emissions inside the composite by facilely modulating the external excitation power, triggering both the trans and cis isomers. We numerically and experimentally show these azobenzene molecules inside the composite exhibited the dynamic equilibrium of partial trans-isomer → cis-isomer and cis-isomer → trans-isomer transitions under the NIR irradiation of high power and low power, respectively. Under high-power NIR light excitation, the high-intensity dynamic isomerization reaction of the complex not only produced "free volume expansion" but also led to structural changes at the condensed scale, thereby significantly decreasing its elasticity and viscosity. In addition, robust switching of its adhesion strength was demonstrated over six cycles. This study shows that the combination of azobenzene polymers and upconversion luminescent materials has great application potential as NIR photoresponsive materials.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Li Qiao,Jing Zhang,Yongjian Jiang,Bianqin Ma,Haomin Chen,Peng Gao,Pengfei Zhang,Anming Wang,Roger A. Sheldon
Effective photolytic regeneration of the NAD( P )H cofactor in enzymatic reductions is an important and elusive goal in biocatalysis. It can, in principle, be achieved using a near-infrared light (NIR) driven artificial photosynthesis system employing H 2 O as the sacrificial reductant. To this end we utilized TiO 2 /reduced graphene quantum dots (r-GQDs), combined with a novel rhodium electron mediator, to continuously supply NADPH in situ for aldo-keto reductase (AKR) mediated asymmetric reductions under NIR irradiation. This upconversion system, in which the Ti-O-C bonds formed between r-GQDs and TiO 2 enabled efficient interfacial charge transfer, was able to regenerate NADPH efficiently in 64 % yield in 105 min. Based on this, the pharmaceutical intermediate ( R )-1-(3,5-bis(trifluoromethyl)phenyl)ethan-1-ol was obtained, in 84 % yield and 99.98 % ee, by reduction of the corresponding ketone. The photo-enzymatic system is recyclable with a polymeric electron mediator, which maintained 66 % of its original catalytic efficiency and excellent enantioselectivity (99.9 % ee) after 6 cycles.
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ACS Applied Polymer Materials
·
2025
·
IF 4.7
Cijun Shuai,Feng Ding,Xiong Shuai,Yanyan Chen,Pan He,Fangwei Qi
Although electrical stimulation had considerable potential for accelerating nerve repair, its future application was confined by the need for an external power supply and a limited range of action. Herein, a nerve scaffold with wireless electrical stimulation and cell recruitment function was constructed by incorporating polyethylenimine (PEI)-modified reduced graphene oxide (rGO) into a pyroelectric polyvinylidene fluoride (PVDF) scaffold fabricated via the laser additive manufacturing technique. Once irradiated with near-infrared light (NIR), rGO dispersed in the PVDF matrix could form numerous micro/nanoscaled thermal gradient fields through the photothermal conversion effect. These thermal gradient fields could further induce PVDF to spontaneously polarize and release surface charges, thereby achieving wireless electrical stimulation. More importantly, the positively charged amino groups on PEI could recruit negatively charged cells to the scaffold by electrostatic interactions, thus realizing better electrical stimulation. The qPCR results and upregulated neuronal markers Tuj, GFAP, and Nestin demonstrated that the generated electrical stimulation could effectively induce bone marrow mesenchymal stem cells to differentiate into neurons. Further mechanisms revealed that the enhanced cell differentiation was mainly attributed to electrical stimulation promoting calcium influx by opening gated calcium ion channels. In summary, this work holds great promise for the treatment of nerve repair.
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INTERNATIONAL JOURNAL OF PHARMACEUTICS
·
2024
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IF 5.3
Danjun Wu,Weili Ji,Shumin Xu,Yazhen Li,Yaning Ji,Kaili Fu,Gensheng Yang
Most nanomedicines with suitable sizes (normally 100–200 nm) exhibit favorable accumulation in the periphery of tumors but hardly penetrate into deep tumors. Effective penetration of nanomedicines requires smaller sizes (less than 30 nm) to overcome the elevated tumor interstitial fluid pressure. Moreover, integrating an efficient diagnostic agent in the nanomedicines is in high demand for precision theranostics of tumors. To this end, a near-infrared light (NIR) −triggered size-shrinkable micelle system (Fe 3 O 4 @AuNFs/DOX-M) coloaded antitumor drug doxorubicin (DOX) and biomodal imaging agent magnetic gold nanoflower (Fe 3 O 4 @AuNFs) was developed to achieve efficient theranostic of tumors. Upon the accumulation of Fe 3 O 4 @AuNFs/DOX-M in the tumor periphery, a NIR laser was irradiated near the tumor sites, and the loaded Fe 3 O 4 @Au NFs could convert the light energy to heat, which triggered the cleavage of DOX-M to the ultra-small micelles (∼5 nm), thus realizing the deep penetration of micelles and on-demand drug release. Moreover, Fe 3 O 4 @AuNFs in the micelles could also be used as CT/MRI dual-modal contrast agent to “visualize” the tumor. Up to 92.6 % of tumor inhibition was achieved for the developed Fe 3 O 4 @AuNFs/DOX-M under NIR irradiation. This versatile micelle system provided a promising drug carrier platform realizing efficient tumor dual-modal diagnosis and photothermal-chemotherapy integration.
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Polymers
·
2024
·Vol. 16
·期 2
·186
·
IF 4.7
Wenbin Wang,Wei Qiang,Chuntao Chen,Dongping Sun
The utilization of titanium dioxide (TiO2) as a photocatalyst for the treatment of wastewater has attracted significant attention in the environmental field. Herein, we prepared an NH2-MIL-125-derived N-doped TiO2@C Visible Light Catalyst through an in situ calcination method. The nitrogen element in the organic connector was released through calcination, simultaneously doping into the sample, thereby enhancing its spectral response to cover the visible region. The as-prepared N-doped TiO2@C catalyst exhibited a preserved cage structure even after calcination, thereby alleviating the optical shielding effect and further augmenting its photocatalytic performance by increasing the reaction sites between the catalyst and pollutants. The calcination time of the N-doped TiO2@C-450 °C catalyst was optimized to achieve a balance between the TiO2content and nitrogen doping level, ensuring efficient degradation rates for basic fuchsin (99.7%), Rhodamine B (89.9%) and tetracycline hydrochloride (93%) within 90 min. Thus, this study presents a feasible strategy for the efficient degradation of pollutants under visible light.Keywords:titanium dioxide;NH2-MIL-125;N-doped TiO2@C;visible light photocatalysis;wastewater pollutants
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MOLECULES
·
2024
·Vol. 29
·期 17
·4196
·
IF 4.2
Yongzhang Xu,Xingrui Luo,Fulin Wang,Wentao Xiang,Chensheng Zhou,Weiya Huang,Kangqiang Lu,Shaoyu Li,Man Zhou,Kai Yang
The development of efficient and environmentally friendly photocatalysts is crucial for addressing global energy and environmental challenges. Perylene diimide, an organic supramolecular material, holds great potential for applications in mineralized phenol. In this study, through the integration of different mass ratios of unmodified perylenimide (PDI-NH) into the self-assembly of amino acid-substituted perylenimide (PDI-COOH), a novel supramolecular organic heterojunction (PDICOOH/PDINH) was fabricated. The ensuing investigation focuses on its visible-light mineralized phenol properties. The results show that the optimal performance is observed with a composite mass fraction of 10%, leading to complete mineralization of 5 mg/L phenol within 5 h. The reaction exhibits one-stage kinetics with rate constants 13.80 and 1.30 times higher than those of PDI-NH and PDI-COOH, respectively. SEM and TEM reveal a heterogeneous interface between PDI-NH and PDI-COOH. Photoelectrochemical and Kelvin probe characterization confirm the generation of a built-in electric field at the interface, which is 1.73 times stronger than that of PDI-COOH. The introduction of PDI-NH promotes π-π stacking of PDI-COOH, while the built-in electric field facilitates efficient charge transfer at the interface, thereby enhancing phenol decomposition. The finding demonstrates that supramolecular heterojunctions have great potential as highly effective photocatalysts for environmental remediation applications.
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Small
·
2024
·
IF 13
Ning Yang,Zhicheng Qian,Renqiang Yuan,Weikun Li,Xin Tan,Zonghao Liu,Qianli Zhang,Liqin Ge,Ling Liu
Acute thrombosis and its complications are leading global causes of disability and death. Existing thrombolytic drugs, such as alteplase and urokinase (UK), carry a significant bleeding risk during clinical treatments. Thus, the development of a novel thrombolysis strategy is of utmost urgency. Based on the previous work, the hollow structure of microcapsules (MC) is fabricated. Subsequently, armor-piercing MC, known as Fucoidan/S-Nitrosoglutathione/Melanin@MC (FGM@MC) is obtained, using a layer-by-layer (LBL) self-assembly method. Utilizing near-infrared (NIR) light as a trigger, the FGM@MC demonstrated photothermal thrombolysis at the site of thrombus due to its stable and outstanding photothermal properties. Simultaneously, photothermal stimulation leads to the release of a significant amount of nitric oxide from the FGM@MC, resulting in cavitation effects for mechanical thrombolysis. In vivo experiments confirmed the stable release of nitric oxide under NIR light irradiation. Treatment of femoral vein thrombosis in rats revealed that the thrombolytic effectiveness of FGM@MC+NIR (53.71%) is comparable to that of UK (59.70%). Notably, FGM@MC does not interfere with the coagulation function of rats and exhibits a favorable safety profile. In conclusion, this study demonstrates that the drug-free armor-piercing microcapsule has significant potential in the treatment of thrombosis, offering a safe and effective alternative to traditional thrombolytic therapies.
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Materials Today Chemistry
·
2024
·
IF 6.7
Na Chen,Yan Bai,Yuan Fang Li,Lei Zhan,Cheng Zhi Huang
Nitric oxide (NO)-based gas therapy has received ever-increasing attention in treatment of many diseases, especially cancer. However, the selective organelle targeted delivery and controllable release of NO remains highly desirable. In this work, a sequentially targeting delivery nanoplatform has been constructed by encapsulating heat-responsive S -nitrosocysteine (the NO donor, SNC) conjugated mitochondria-targeting carbon dots (MitoCDs) and indocyanine green (ICG) within liposomes which are further modified with aptamer that can specifically bind to nucleolin overexpressed on the surface of several cancer cells. MitoCDs were prepared via one-step hydrothermal reaction using citric acid and m -diethylaminophenol as starting materials and used without any external targeting molecules. ICG molecules were employed as NIR-triggered photothermal agent followed by NO precisely controlled release in mitochondria. By combining gas and photothermal treatment, the nanocarrier produced a synergistic and superior killing effect on several cancer cell lines. And the cell growth inhibition of NCL-CSI@Lip on HEp-2 cells raised up to 72.39 %. Such an ‘all-in-one’ mitochondria-targeted NO nanocarrier may lead to new way for overcoming the problem of multidrug resistance in intracellular drug delivery.
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