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Ultrasound-triggered piezocatalytic composite hydrogels for promoting bacterial-infected wound healing

Bioactive Materials 2023年第6期24卷 96-111页

作者： Dun Liu Lei Li Ben-Long Shi Bo Shi Ming-Ding Li Yong Qiu Di Zhao Qun-Dong Shen Ze-Zhang Zhu Division of Spine Surgery Department of Orthopedic SurgeryAffiliated Drum Tower HospitalMedical School of Nanjing UniversityNanjing210008China Department of Polymer Science and Engineering Key Laboratory of High-Performance Polymer Materials and Technology of MOESchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing210023China Institute of Brain Science and Disease School of Basic MedicineQingdao UniversityQingdaoShandong266001China

Wound healing has become one of the basic issues faced by the medical community because of the susceptibility of skin wounds to bacterial *** such,it is highly desired to design a nanocomposite hydrogel with excellent antibacterial activity to achieve high wound closure ***,based on ultrasound-triggered piezocatalytic therapy,a multifunctional hydrogel is designed to promote bacteria-infected wound *** ultrasonic vibration,the surface of barium titanate(BaTiO_(3),BT)nanoparticles embedded in the hydrogel rapidly generate reactive oxygen species(ROS)owing to the established strong built-in electric field,endowing the hydrogel with superior antibacterial *** modality shows intriguing advantages over conventional photodynamic therapy,such as prominent soft tissue penetration ability and the avoidance of serious skin phototoxicity after systemic administration of ***,the hydrogel based on N-[tris(hydroxymethyl)methyl]acrylamide(THM),N-(3-aminopropyl)methacrylamide hydrochloride(APMH)and oxidized hyaluronic acid(OHA)exhibits outstanding self-healing and bioadhesive properties able to accelerate full-thickness skin wound ***,compared with the widely reported mussel-inspired adhesive hydrogels,OHA/THM-APMH hydrogel due to the multiple hydrogen bonds from unique tri-hydroxyl structure overcomes the shortage that catechol groups are easily oxidized,giving it long-term and repeatable adhesion ***,this hybrid hydrogel confines BT nanoparticles to wound area and locally induced piezoelectric catalysis under ultrasound to eradicate bacteria,markedly improving the therapeutic biosafety and exhibits great potential for harmless treatment of bacteria-infected tissues.

关键词： Multifunctional hydrogels Bioadhesiveness Self-healing Antibacterial ability Piezocatalytic therapy

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Iodinated underlayer for enhanced chemically amplified resist performance 42

Iodinated underlayer for enhanced chemically amplified resis...

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Advances in Patterning Materials and Processes XLII

作者： Ku, Yejin Choi, Hyoeun Kim, Gayoung Lee, Jin-Kyun Kim, Jiho Lee, Sangsul Program in Environment and Polymer Engineering Inha University Incheon22212 Korea Republic of Department of Polymer Science and Engineering Inha University Incheon22212 Korea Republic of Program in Semiconductor Convergence Inha University Incheon22212 Korea Republic of Pohang Accelerator Laboratory POSTECH Pohang37673 Korea Republic of

ISBN: (纸本)9781510686427

High-numerical-aperture (NA) extreme ultraviolet lithography (EUVL) is essential for next-generation semiconductor manufacturing, requiring advanced photoresists (PRs) that can function effectively in ultra-thin films. However, ultra-thin PR films-primarily needed to meet stringent depth-of-focus constraints-face several challenges, including low photon absorption and reduced etch resistance. Additionally, as feature sizes shrink, the diminished PR-substrate contact area exacerbates pattern collapse issues in high NA EUVL. To mitigate these challenges, underlayers are increasingly employed to enhance patterning performance. In this study, we propose a supportive underlayer (SUL) to enhance the sensitivity of chemically-amplified photoresists (CARs) and improve adhesion between the CAR film and the SUL. As a preliminary step, we introduced a simple experimental protocol to identify high-absorption elements that could be more effective in the CAR system, exploiting a PR film-overcoat bi-layer structure. Overcoats containing hydrogen (H), iodine (I), and tin (Sn) were readily prepared on top of the CAR film by the help of solvent orthogonality. Our findings revealed that iodine atoms significantly reduced the exposure threshold compared to hydrogen or tin. Based on these results, hydrophobic iodinated materials were selected as SUL candidates, and a few materials were synthesized with different iodine contents. After fabricating the bi-layer stack, we evaluated the solubility changes of PR films under both positive- and negative-tone development (PTD and NTD) conditions. The incorporation of an iodinated SUL beneath the CAR films enhanced both lithographic sensitivity and substrate adhesion, regardless of the development type, with higher iodine content further amplifying these effects. These findings provide a promising pathway for implementing EUV underlayers specifically tailored for high-NA EUVL. © 2025 SPIE.

关键词： Extreme ultraviolet lithography

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Corrigendum to“Ultrasound-triggered piezocatalytic composite hydrogels for promoting bacterial-infected wound healing”[***.24(2023)96-111]

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Bioactive Materials 2024年第2期32卷 147-148页

作者： Dun Liu Lei Li Ben-Long Shi Bo Shi Ming-Ding Li Yong Qiu Di Zhao QunDong Shen Ze-Zhang Zhu Division of Spine Surgery Department of Orthopedic SurgeryAffiliated Drum Tower HospitalMedical School of Nanjing UniversityNanjing210008China Department of Polymer Science and Engineering Key Laboratory of High-Performance Polymer Materials and Technology of MOESchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing210023China Institute of Brain Science and Disease School of Basic MedicineQingdao UniversityQingdaoShandong266001China

The authors regret.The authors would like to apologise for any inconvenience caused.

关键词： wound checked healing

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Intelligent gold nanocluster for effective treatment of malignant tumor via tumor-specific photothermal–chemodynamic therapy with AIE guidance

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National science Review 2024年第5期11卷 326-342页

作者： Feng Liu Tianfeng Yang Xiaowei Chang Li Chen Cheng Cheng Xiuhong Peng Haihu Liu Yanmin Zhang Xin Chen School of Energy and Power Engineering Xi'an Jiaotong University Department of Chemical Engineering Shaanxi Key Laboratory of Energy Chemical Process IntensificationInstitute of Polymer Science in Chemical Engineering School of Chemical Engineering and Technology Xi'an Jiaotong University School of Pharmacy Health Science Center Xi'an Jiaotong University

Precise and efficient therapy of malignant tumors is always a challenge. Herein, gold nanoclusters co-modified by aggregation-induced-emission（AIE） molecules, copper ion chelator（acylthiourea） and tumor-targeting agent（folic acid） were fabricated to perform AIE-guided and tumor-specific synergistic therapy with great spatio-temporal controllability for the targeted elimination and metastasis inhibition of malignant tumors. During therapy, the functional gold nanoclusters（Au NTF） would rapidly accumulate in the tumor tissue due to the enhanced permeability and retention effect as well as folic acid-mediated tumor targeting, which was followed by endocytosis by tumor cells. After that, the overexpressed copper ions in the tumor cells would trigger the aggregation of these intracellular Au NTF via a chelation process that not only generated the photothermal agent in situ to perform the tumor-specific photothermal therapy damaging the primary tumor, but also led to the copper deficiency of tumor cells to inhibit its ***, the copper ions were reduced to cuprous ions along with the chelation, which further catalysed the excess H2O2in the tumor cells to produce cytotoxic reactive oxygen species, resulting in additional chemodynamic therapy for enhanced antitumor efficiency. The aggregation of Au NTF also activated the AIE molecules to present fluorescence, which not only imaged the therapeutic area for real-time monitoring of this tumor-specific synergistic therapy, but also allowed us to perform near-infrared radiation at the correct time point and location to achieve optimal photothermal therapy. Both in vitro and in vivo results revealed the strong tumor elimination, effective metastasis inhibition and high survival rate of tumor-bearing mice after treatment using the Au NTF nanoclusters, indicating that this AIE-guided and tumor-specific synergistic strategy could offer a promising approach for tumor therapy.

关键词： AIE-guided precise tumor treatment copper-dependent photothermal therapy copper-triggered chemodynamic therapy primary tumor elimination copper-plunder-induced metastasis inhibition

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Study on the Co-crystal Transition Process and Mechanism of CL-20 and HMX in Propellant Formulation 4

Study on the Co-crystal Transition Process and Mechanism of ...

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4th International Conference on Defence Technology, ICDT 2024

作者： Zou, Pangangjing Li, Shichun Huang, Shiliang Zhang, Haobin Liu, Yu Li, Liangbin Xu, Jinjiang CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and Engineering University of Science and Technology of China Anhui 230026 China Institute of Chemical Materials China Academy of Engineering Physics Mianyang621900 China

The integration of CL-20 into solid propellants to enhance their energy levels has emerged as a focal point in the research of high-energy solid propellants and the use of CL-20 as a partial substitute for traditional oxidizers in propellant formulations has emerged as a viable method for propellant modification. However, research indicates that the microstructure and crystal form of CL-20 and HMX may undergo changes due to external stimuli and energy induction, resulting in significant deterioration of the propellant's mechanical and combustion properties, as well as its safety. We were surprised to find that CL-20 and HMX can form co-crystal not only in the nitric ester plasticizer like DOS but also in some specific binders, such as GAP and HTPE, and revealed that the solvent's capacity to dissolve two explosives is the key determinant in the formation of co-crystal. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： HMX

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Deformation behavior of epoxy-modified high strength concrete under uniaxial and repeated compression load

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Asian Journal of Civil engineering 2022年第2期23卷 219-227页

作者： Rahman, Md Mostafizur Islam, Md Akhtarul Department of Chemical Engineering and Polymer Science Shahjalal University of Science and Technology (SUST) Sylhet 3114 Bangladesh

This study deals with the deformation characteristics of epoxy-modified concrete (EMC) under uniaxial and repeated compressive load with a view to evaluate its potential for use in structures that are subjected to in-service deformations under seismic conditions. A series of concrete specimens were prepared with epoxy resin either as the only binder or as co-binder jointly with the conventional binder, Portland cement. The specimens were evaluated on the basis of mechanical strength and deformability. The modulus of elasticity and the Poisson’s ratio of the EMC have been compared with conventional Portland cement concrete (CC).The first exhibits much higher axial and lateral deformation capacity than the later, a clear indication of higher energy-dissipation ability and ductility. © 2022, The Author(s), under exclusive licence to Springer Nature Switzerland AG.

关键词： Concrete Deformation Epoxy resin High strength Repeated loading

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CO_(2)-Sourced Poly(chloropropylene carbonate) with High Flame-Retardant Performance

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Chinese Journal of polymer science 2025年第1期43卷 110-119,I0010页

作者： Yue Gong Xiao-Feng Zhu Guan-Wen Yang Meng Ma Xu Wang Jie Xu Xin Shu Guang-Peng Wu MOE Key Laboratory of Macromolecular Synthesis and Functionalization Key Laboratory of Adsorption and Separation Materials&Technologies of Zhejiang ProvinceDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310058China Zhejiang Key Laboratory of Plastic Modification and Processing Technology College of Materials Science and EngineeringZhejiang University of Technology Hangzhou 310014China Shanxi Coal Chemical Industry Technology Research Institute Co Ltd.Xi'an 710100China

The alternating copolymer of CO_(2) with epoxide is a green plastic that can efficiently transform CO_(2) into valuable chemicals. Despite the significant advances made, the restricted practical application of CO_(2)-sourced polycarbonates due to their lack of functionality has hindered field development. We successfully demonstrated the flame retardancy of poly(chloropropylene carbonate) (PCPC), a perfectly alternating copolymer of epichlorohydrin (ECH) and CO_(2). This was prepared at a 200-gram scale using a high-efficacy tetranuclear organoborane catalyst. PCPC’s excellent flame-retardant performance has been proven by both the vertical combustion test (UL94 V-0) and the limiting oxygen index (LOI) value (29.1%). The underlaid flame-retardant mechanism of PCPC was clearly elucidated. As a result, we confirmed that the generated cyclic carbonates and concurrently released flame-retardant chlorine radicals, hydrogen chloride, and CO_(2) during combustion render PCPC an excellent flame retardant. Furthermore, we investigated the practicability of PCPC as a halogen-rich polymeric flame retardant by blending it with commercial bisphenol A polycarbonate (BPA-PC). PCPC upgraded the flame retardancy rating of BPA polycarbonate from V-2 to V-0 even with a mere 1 wt% addition. It is our hope that this result will prove useful in future developments of advanced CO_(2)-sourced polymeric materials.

关键词： Carbon dioxide Ring-Opening polymerization Organocatalysis Sustainable materials Flame-retardant polymer

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A breathing A4 paper by in situ growth of green metal-organic frameworks for air freshening and cleaning

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Chinese Journal of chemical engineering 2022年第12期52卷 95-102页

作者： Bo Zhang Hongwen Chen Liming Jiang Youqing Shen Dan Zhao Zhuxian Zhou Key Laboratory of Biomass Chemical Engineering of Ministry of Education and Zhejiang Key Laboratory of Smart Biomaterials College of Chemical and Biological EngineeringZhejiang UniversityHangzhou 310027China Department of Polymer Science and Engineering Zhejiang UniversityHangzhou 310027China Department of Chemical&Biomolecular Engineering National University of Singapore117585Singapore Hangzhou Global Scientific and Technological Innovation Center Zhejiang UniversityHangzhou 311215China

Surface modification of natural cellulose fibers with nanomaterials is an effective strategy for producing functional textiles for multiple applications.A4-sized printing paper is a commonly used,cheap,and easily acquirable office supply which is mainly made of cellulose ***,we report green and simple nanofabrication of A4 paper to endow it with high capability for fragrance encapsulation and sustained release,and strong adsorption to indoor air *** method utilizes the sugar molecule of cellulose for in-situ growth ofγ-cyclodextrin(γ-CD)metal-organic frameworks(MOFs)on A4 *** obtainedγ-CD-MOF/A4 nanocomposites have superior specific surface area and high porous ***γ-CD-MOF/A4 nanocomposites can effectively encapsulate fragrant molecules through host-guest ***γ-CD-MOF/A4 nanocomposites also show strong absorption capability to formaldehyde and carbon dioxide through the formation of hydrogen bonding and chemical ***γ-CD-MOF/A4nanocomposites combine the advantages of both A4 paper andγ-CD-MOF,which can be used in indoor air freshening and cleaning.

关键词： Metal-organic frameworks A4 printing paper In situ synthesis Fragrance encapsulation Formaldehyde removal Carbon dioxide capture

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Potential use of Ulva intestinalis-derived biochar adsorbing phosphate ions in the cultivation of winter wheat Tristicum aestivum

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Bioresources and Bioprocessing 2024年第1期11卷 371-394页

作者： Natalia Niedzbała Ewa Lorenc-Grabowska Piotr Rutkowski Jacek Chęcmanowski Anna Szymczycha-Madeja Maja Wełna Izabela Michalak Department of Advanced Material Technologies Faculty of ChemistryWrocław University of Science and TechnologyWrocławPoland Department of Process Engineering and Technology of Polymer and Carbon Materials Faculty of ChemistryWrocław University of Science and TechnologyWrocławPoland Department of Analytical Chemistry and Chemical Metallurgy Faculty of ChemistryWrocław University of Science and TechnologyWrocławPoland

In this work,the properties of biochar produced from green macroalga Ulva intestinalis by pyrolysis were studied at temperatures of 300,500,and 700°*** biochar was characterized in terms of multielemental composition,BET surface area,total pore volume,and biosorption properties toward phosphate *** produced at 700°C-25 m2/g had the highest surface *** kinetics and isotherms of sorption processes of phosphate ions as sorbate by these sorbents were *** biochar was able to remove 84.3%of phosphate ions from wastewater,whereas non-modified biochar-only 40.6%.Hence,biochar enriched with phosphate ions can serve as a valuable soil *** experiments performed on winter wheat(Triticum aestivum)with a 3%addition of dry Ulva intestinalis,pristine biochar,and Mg-modified biochar enriched with phosphate ions showed that these amendments stimulated plant growth(length and fresh weight of plants)as well as enlarging the chlorophyll content in *** results indicate that the production of biochar(pristine and Mg-impregnated)is a sustainable option to valorize the biomass of seaweeds,and to recycle phosphorus from wastewater.

关键词： Green seaweed Pyrolysis Biochar Phosphate ions Wastewater treatment Soil additives

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Polyethylene interfacial dielectric layer for organic semiconductor single crystal based field-effect transistors

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Chinese chemical Letters 2024年第4期35卷 431-435页

作者： Min Chen Boyu Peng Xuyun Guo Ye Zhu Hanying Li Department of Polymer Science and Engineering MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationInternational Research Center for X PolymersShanxi-Zheda Institute of Advanced Materials and Chemical EngineeringZhejiang UniversityHangzhou 310027China Department of Applied Physics Research Institute for Smart EnergyThe Hong Kong Polytechnic UniversityHong Kong 999077China

Organic semiconductor single crystals(OSSCs) have shown their promising potential in high-performance organic field-effect transistors(OFETs). The interfacial dielectric layers are critical in these OFETs as they not only govern the key semiconductor/dielectric interface quality but also determine the growth of OSSCs by their wetting properties. However, reported interfacial dielectric layers either need rigorous preparation processes, rely on certain surface chemistry reactions, or exhibit poor solvent resistance, which limits their applications in low-cost, large-area, monolithic fabrication of OSSC-based OFETs. In this work, polyethylene(PE) thin films and lamellar single crystals are utilized as the interfacial dielectric layers, providing solvent resistive but wettable surfaces that facilitate the crystallization of 6,13-bis(tri-isopropylsilylethynyl)pentacene(TIPS-PEN) and 6,13-bis(triisopropylsilylethynyl)-5,7,12,14-tetraazapentacene(TIPS-TAP). As evidenced by the presence of ambipolar behavior in TIPS-PEN single crystals and the high electron mobility(2.3 ± 0.34 cm^(2)V^(-1)s^(-1)) in TIPS-TAP single crystals, a general improvement on electron transport with PE interfacial dielectric layers is revealed, which likely associates with the chemically inertness of the saturated C-H bonds. With the advantages in both processing and device operation, the PE interfacial dielectric layer potentially offers a monolithic way for the enhancement of electron transport in solution-processed OSSC-based OFETs.

关键词： Polyethylene Interfacial dielectric layer Organic semiconductor Single crystal Organic field-effect transistors

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