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Device 2025年

作者： Zhong, Yizhou Zhang, Yongcao Pu, Jing Wustoni, Shofarul Uribe, Johana Lopez-Larrea, Naroa Marks, Adam McCulloch, Iain Mecerreyes, David Baran, Derya Inal, Sahika Organic Bioelectronics Laboratory Biological and Environmental Science and Engineering Division King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia Materials Science and Engineering Program (MSE) Physical Sciences and Engineering Division (PSE) KAUST Thuwal 23955-6900 Saudi Arabia POLYMAT University of the Basque Country UPV/EHU Avenida Tolosa 72 Guipuzcoa Donostia-San Sebastian 20018 Spain Department of Chemistry University of Oxford Oxford OX1 3TF United Kingdom Andlinger Center for Energy and the Environment and Department of Electrical and Computer Engineering Princeton University Princeton 08544 NJ United States IKERBASQUE Basque Foundation for Science Plaza Euskadi 5 Bilbao 48009 Spain

Hemodynamics, the study of blood flow and circulatory forces, is fundamental for assessing cardiovascular health, disease states, and therapeutic outcomes. Here, we introduce a skin-conformable organic optoelectronic thin-film patch (ePatch) designed to simultaneously capture electrocardiography (ECG) and photoplethysmography (PPG) signals as a single hybrid signal, named the electrocardio-photoplethysmogram (EC-PPG). The ePatch integrates an organic electrochemical transistor (OECT), an organic photodiode, surface-mounted light-emitting diodes, and electrochemical electrodes on a flexible, skin-conforming substrate. By training deep learning models on the hybrid EC-PPG data, we achieved accurate arterial blood pressure estimations, with mean errors of just 1.69 mmHg for systolic and 0.89 mmHg for diastolic blood pressure, outperforming traditional predictions that rely on individual physiological signals as inputs. Our findings underscore the potential of EC-PPG as a compound hemodynamic signal for AI-driven vital sign monitoring and integrated, solution-processable soft electronics for clinical and point-of-care applications. © 2025 The Authors

关键词： DTI-3: Develop electrocardiography electrophysiology flexible electronics OECT OPD organic electrochemical transistor photoplethysmography wearable electronics

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Seamlessly-integrated Textile Electric Circuit Enabled by Self-connecting Interwoven Points

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Chinese Journal of Polymer science 2022年第11期40卷 1323-1330页

作者： Hui-Yang Wu Xiang Shi Zi-Hao Zhou Yue Liu Xiang-Ran Cheng Yi-Bei Yang Xin-Yue Kang Yue Guo Kai-Wen Zeng Bing-Jie Wang Xue-Mei Sun Pei-Ning Chen Hui-Sheng Peng State Key Laboratory of Molecular Engineering of Polymers Laboratory of Advanced Materials and Department of Macromolecular ScienceFudan UniversityShanghai200438China

Flexible,breathable and lightweight electronic textiles hold great promise to change the ways we intact with *** connections among functional components are indispensable for system integrations of electronic ***,it remains challenging to achieve mechanically and electrically robust connections to fully integrate with interwoven architecture and weaving process of ***,we reported a seamlessly-integrated textile electric circuit by weaving conductive fibers with self-connecting capacity at the interwoven *** conductive fibers(SCFs)were prepared by coating modified polyurethane conductive composites onto nylon *** connections were achieved at interwoven points in less than 5 s once the weft and warp SCFs were woven together,due to the designed dynamic bonds of aromatic disulfide metathesis and hydrogen bonds in the modified polyurethane(MPU).The self-connecting point was electrically stable(varied by less than 6.7%in electrical resistance)to withstand repeated deformations of bending,pressing and even *** a selfconnecting strategy could be generalized to weave full-textile electronics capable of receiving signals and displaying with enhanced interfacial stability,offering a new way to unify fabrication of electronics and weaving of textiles.

关键词： Electronic textile Electric circuit Conductive fiber Function integration

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A General Strategy for the Synthesis of Metal-Backboned Molecules with Different Metals

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Angewandte Chemie 2025年

作者： Yanruzhen Wu Yifeng Zhang Dr. Kaiwen Zeng Xiangran Cheng Jiatian Song Prof. Huisheng Peng State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Institute of Fiber Materials and Devices and Laboratory of Advanced Materials Fudan University Shanghai 200438 China

Metal-backboned molecules have been recently explored as a new class of materials with remarkable physical and chemical properties. However, their backbones are mainly composed of Ni atoms and poses challenges in incorporating a wide range of metallic elemental species, which has severely hindered their further development. Herein, we have designed a general synthesis strategy and obtained new metal-backboned molecules with a variety of metals including Cu, Ru, Rh, Pd, Ag and Pt in the backbones through a ligand-assisted strategy under screening reaction conditions. The metal backbone with seven Cu atoms has been carefully demonstrated for the synthesis. The intriguing optical properties, electronic band gaps and thermal properties for the metal-backboned molecules have been further explored. This work provides a new avenue on the synthesis of high-performance metal-backboned molecule materials for promising applications in the future.

关键词： metal-backboned molecule ligand-assisted synthesis various metals metal–metal bond

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Coaxial fiber organic electrochemical transistor with high transconductance

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Nano Research 2023年第9期16卷 11885-11892页

作者： Yuan Fang Jianyou Feng Xiang Shi Yiqing Yang Jiajia Wang Xiao Sun Wenjun Li Xuemei Sun Huisheng Peng State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Scienceand Laboratory of Advanced MaterialsFudan UniversityShanghai 200438China

Fiber organic electrochemical transistors(OECTs)have received extensive attention in wearable and implantable biosensors because of their high flexibility and low working ***,the transconductance of fiber OECTs is much lower compared with the planar counterparts,leading to low ***,we developed fiber OECTs in a coaxial configuration with microscale channel length to achieve the highest transconductance of 135 mS,which is one to two orders of magnitude higher than that of the state-of-the-art fiber *** fiber OECT based sensors showed high sensitivities of 12.78,20.53 and 3.78 mA/decade to ascorbic acid,hydrogen peroxide and glucose,*** fiber OECTs were woven into a fabric to monitor the glucose in sweat during exercise and implanted in mouse brain to detect ascorbic *** coaxial architectural design offers an effective way to promote the performance of fiber OECTs and realize highly sensitive detection of biochemicals.

关键词： organic electrochemical transistor fiber coaxial structure ascorbic acid hydrogen peroxide glucose

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Thermo-optical properties of erbium-doped germanate-bismuth glasses

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Optical materials 2025年 166卷

作者： Silva, Adriano Almeida Lima, Lucas Batista Silva da Silva, Isis Lee Garcia, Hans Anderson Bell, Maria José Valenzuela Kassab, Luciana Reyes Pires Santos, Francisco Eroni Paz Postgraduate Program in Physics Federal University of Piauí PI 64049550 Brazil Department of Physics Federal University of Juiz de Fora MG Juiz de Fora36036-900 Brazil Faculdade de Tecnologia São Paulo CEETEPS SP São Paulo01124060 Brazil Postgraduate Program in Engineering and Materials Science Federal University of Teresina PI 64049550 Brazil

In this study, we investigate the thermo-optical properties of GeO2–Bi2O3 glasses doped with different concentrations of rare earth ions by thermal lens technique;UV-VIS and photoluminescence (PL) spectroscopy, as well as measurements of thermal diffusivity, thermal conductivity and quantum efficiency, are presented aiming at potential photonic applications. High infrared fluorescence lifetimes around 4 ms and quantum efficiencies of ∼80 % for 1 % Er3+ concentration, determined via lifetime and thermal lens methods, enabled efficient laser operation. Positive ds/dT values confirmed the self-focusing nature beneficial for high-power systems. While quantum efficiencies decreased exponentially with rising Er3+ due to non-radiative relaxation from erbium-matrix interactions, reasonably high efficiencies above 74 % persisted at 1 % doping. The thermal diffusivity and conductivity exhibited little changes with varying Er3+ concentration and showed to be matrix dependent. © 2025 Elsevier B.V.

关键词： Quantum efficiency

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Dual-sided symmetric crystalline orientation of covalent organic framework membranes for unidirectional anhydrous proton conduction

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science China Chemistry 2022年第12期65卷 2548-2557页

作者： Shujing Liu Zheng Lin Changchun Wang Jia Guo State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science and Lab of Advanced MaterialsFudan UniversityShanghai200438China

Two-dimensional covalent organic frameworks(2D COFs)have sparkled wide-ranging research to explore proton-conducting ***,the powder-pressed pellets or continuous membranes of 2D COFs are composed of randomly arranged crystallites,which are undesirable for proton transport via a shortcut *** report a controlled strategy for preparing a conformably oriented free-standing COF membrane to address the critical challenge.A monofunctional aldehyde precursor is used as a modulator to enhance reversible association and optimize growth orientation in an interfacial polymerization *** preferred face-on alignment is achieved throughout the membrane from its flat side to the nanoflake-standing side and,in turn,generates the unidirectional pore channels for accommodating 1,2,4-triazole as proton *** composite merges distinctive features including orientation,crystallinity,porosity,and mechanical strength into one system,exhibiting ultrafast and stable anhydrous proton conduction at high operating temperatures with low activation *** findings offer an innovative strategy for the oriented crystallization of free-standing COF membranes for energy conversion applications.

关键词： covalent organic frameworks oriented crystallization anhydrous proton conduction interfacial polymerization membranes

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Water Soluble Amino Grafted Silicon Nanoparticles and Their Use in Polymer Solar Cells

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Chinese Journal of Polymer science 2014年第4期32卷 395-401页

作者： Quan-xiang Yan Zhuo-wei Gu Qi Li Wei-fei Fu Xiao-qiang Chen Wen-qing Liu Hong-bin Pan Mang Wang 陈红征 State Key Lab of Silicon Materials MOE Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang University

Stable aqueous amino-grafted silicon nanoparticles （SiNPs-NH2） were prepared via one-pot solution method. By grafting amino groups on the particle surface, the dispersion of SiNPs in water became very stable and clear aqueous solutions could be obtained. By incorporating SiNPs-NH2 into the hole transport layer of poly（3,4- ethylenedioxythiophene）/polystyrene sulfonic acid （PEDOT＇PSS）, the performance of polymer solar cells composed of poly[2-methoxy,5-（2＇-ethylhexyloxy）-1,4-phenylene vinylene] （MEH-PPV）：[6,6]-phenyl-C61-butyric acid methyl ester （PCBM） as active layer can be improved. SiNPs-NH2 are dispersed uniformly in the PEDOT：PSS solution and help form morphologies with small-sized domains in the PEDOT：PSS film. SiNPs-NH2 serve as screens between conducting polymer PEDOT and ionomer PSS to improve the phase separation and charge transport of the hole transport layer. As a result, the sheet resistance of PEDOT：PSS thin films is decreased from （93 ±5） × 10^5 to （13 ± 3） × 10^5 Ω/□. The power conversion efficiency （PCE） of polymer solar cells was thus improved by 9.8% for devices fabricated with PEDOT＇PSS containing 1 wt% of SiNPs-NH2, compared with the devices fabricated by original PEDOT：PSS.

关键词： SiNPs-NH2 Water-soluble Phase separation Polymer solar cells Transport.

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Production of Functional materials Derived from Regenerated Silk Fibroin by Utilizing 3D Printing and Biomimetic Enzyme-induced Mineralization

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Chinese Journal of Polymer science 2024年第3期42卷 299-310,I0005页

作者： Ni Chen Fei-Yu Luo Gong-Wen Yang Jin-Rong Yao Xin Chen Zheng-Zhong Shao State Key Laboratory of Molecular Engineering of Polymers Laboratory of Advanced Materials and Department of Macromolecular ScienceFudan UniversityShanghai 200433China

Critical-sized bone defects, commonly encountered in clinical orthopedic surgery, present a significant challenge. One of the promising solutions is to prepare synthetic bone substitute materials with precise structural control, mechanical compatibility, and enhanced osteogenic induction performance, nevertheless the successful preparation of such materials remains difficult. In this study, a two-step technique,integrating an extrusion-based printing process with biomimetic mineralization induced by alkaline phosphatase(ALP), was developed. Initially,a pre-cured hydrogel of regenerated silk fibroin(RSF) with a small quantity of hydroxypropyl cellulose(HPC) and ALP was prepared through heating the mixed aqueous solution. This pre-cured hydrogel demonstrated thixotropic property and could be directly extruded into predetermined structures through a 3D-printer. Subsequently, the 3D-printed RSF-based materials with ALP underwent biomimetic in situ mineralization in calcium glycerophosphate(Ca-GP) mineralizing solution, utilizing the polymer chains of RSF as templates and ALP as a trigger for cleaving phosphate bonds of Ca-GP. The resulting 3D-printed RSF-mineral composites including hydrogel and sponge possessed adjustable compression modulus of megapascal grade and variable hydroxyapatite content, which could be controlled by manipulating the duration of the mineralization ***, these 3D-printed RSF-mineral composites demonstrated non-cytotoxicity towards rat bone marrow mesenchymal stem cells. Therefore, they may hold great potential for applications involving the replacement of tissues characterized by osteoinductivity and intricate structures.

关键词： Silk protein Alkaline phosphatase Extrusion-based printing Biomineralization

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A Novel Regenerated Silk Fibroin-based Hydrogels with Magnetic and Catalytic Activities

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Chinese Journal of Polymer science 2017年第4期35卷 515-523页

作者： kun-yuan luo 邵正中 State Key Laboratory of Molecular Engineering of Polymers Laboratory of Advanced Materials and Department of Macromolecular Science Fudan University Shanghai 200433 China

A simple and facile synthetic methodology for fabricating the regenerated silk fibroin （RSF）-based hydrogel which consisted of the in situ generated magnetic ferriferous oxide （Fe304） was developed. Using the co-precipitation of Fe2＋ and Fe3＋ within the RSF-based hydrogel with 90% RSF and 10% HPMC （hydroxypropyl methyl cellulose）, the as-prepared RSF/Fe304 hydrogel not only showed high strength of saturation magnetization, but also exhibited excellent catalytic activities. For example, with the assistant of 3,3＇,5,5＇-tetramethylbenzidine （TMB）, the RSF/Fe304 hydrogel could detect H202 at a concentration as low as 1 x 10-6 mol.L-1 In addition, the catalytic activities were able to be maintained for a long term under various conditions. These findings suggest that the RSF-based materials can be endowed with interesting properties, and have great potential for the applications in the fields of biotechnology and environmental chemistry.

关键词： Natural polymer Silk Hydrogel Nanoparticle Magnetic and catalytic activity

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Effect of dual modification on structural, functional and dielectric properties of cassava starch

Food Physics

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Food Physics 2025年 2卷

作者： Cremasco, Paula Figueiredo M. Siqueira, Karine Mayuri Pistoni Sobral, Paulo José do Amaral Velloso, Walter Ferreira de Lima, César Gonçalves Gut, Jorge Andrey Wilhelms Moraes, Izabel Cristina Freitas Postgraduate Program in Materials Science and Engineering Faculty of Animal Science and Food Engineering University of São Paulo Avenue Duque de Caxias Norte São Paulo Pirassununga 13635900 Brazil Department of Biossistems Engineering Faculty of Animal Science and Food Engineering University of São Paulo Avenue Duque de Caxias Norte São Paulo Pirassununga 13635900 Brazil Department of Food Engineering Faculty of Animal Science and Food Engineering University of São Paulo Avenue Duque de Caxias Norte São Paulo Pirassununga 13635900 Brazil Food Research Center (FoRC) University of São Paulo Lake Street São Paulo São Paulo 05508-080 Brazil Departament of Basic Sciences Faculty of Animal Science and Food Engineering University of São Paulo Avenue Duque de Caxias Norte São Paulo Pirassununga 13635900 Brazil Department of Chemical Engineering Polytechnic School University of São Paulo Lake Street São Paulo São Paulo 05508-080 Brazil

The combined effect of hydrocolloid addition and microwave heating on the structural, physical and functional properties of cassava starch remains underexplored, despite individual studies on these modification methods. The dielectric properties, important for the microwave treatment of starch, have received little attention in recent studies. Cassava starch with and without addition of hydrocolloids (guar and xanthan gums) was modified by microwave heating for two different exposure times, and its structural, functional, and dielectric properties were studied. The dual modification enhanced the swelling power and oil holding capacity of the starch, reduced its gelatinization temperature, and did not alter its crystallinity. Notably, xanthan-modified starch microwaved for 6 min exhibited higher color variation (ΔE*) and increased granules agglomeration, while the microwave treatment alone roughened the surface of the starch granules. The mean diameters D[4,3] of starch increased with xanthan gum addition, microwave treatment (6 min), and their combination. The relative permittivity (ε’), loss factor (ε”) and penetration depth (D_p) were lower for samples modified by the combined method. Considering the type of hydrocolloid and the microwave exposure time, the combined modification significantly influenced the properties of starch, offering a promising approach to producing starch with enhanced functional properties. © 2024 KeAi Communications Co., Ltd

关键词： Biopolymers Cassava starch Guar Microwave Xanthan

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