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Electrochemical immunosensing by carbon ink/carbon dot/ZnO-labeled-Ag@polypyrrole composite biomarker for CA-125 ovarian cancer detection

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Bioelectrochemistry 2023年第1期152卷 108430页

作者： Krathumkhet, Nattinee Imae, Toyoko Wang, Fu-ming Yuan, Chiou-Chung Manidae Lumban Gaol, Jusni Paradee, Nophawan Sustainable Polymer & Innovative Composite Materials Research Group Department of Chemistry Faculty of Science King Mongkut's University of Technology Thonburi 126 Pracha Uthit Road Bangmod Thungkru Bangkok10140 Thailand Graduate Institute of Applied Science and Technology National Taiwan University of Science and Technology 43 Keelung Road Section 4 Taipei10607 Taiwan Department of Materials Science and Engineering National Taiwan University of Science and Technology 43 Keelung Road Section 4 Taipei10607 Taiwan Department of Chemical Engineering National Taiwan University of Science and Technology 43 Keelung Road Section 4 Taipei10607 Taiwan Sustainable Energy Center National Taiwan University of Science and Technology 43 Keelung Road Section 4 Taipei10607 Taiwan Department of Chemical Engineering Chung Yuan Christian University 200 Zhongbei Rd Zhongli District Taoyuan32023 Taiwan R&D Center for Membrane Technology Chung Yuan Christian University 200 Zhongbei Rd Zhongli District Taoyuan32023 Taiwan Department of Obstetrics and Gynecology Cheng Hsin General Hospital 45 Zhenxing St Beitou Taipei11220 Taiwan

In this work, we demonstrated a novel cancer antigen 125 (CA125) biomarker detection based on electrochemical immunosensor. The biomarker on conductive composite materials of carbon ink/carbon dot/zine oxide (C-ink/CD/ZnO) was employed as an electrode platform by using ITO substrate to enhance the interaction of antibodies (Ab) with supporting catalytic performance of ZnO as a labeling signal molecule. They were a scientist attention for biosensor with chemical stability, strong biocompatibility, high conductive signal, and accuracy. Moreover, the nanocomposite of silver@polypyrrole (Ag@PPy) was used as a potential redox mediator. The labeled construction with Ag@PPy was more accuracy than that of a free-labeled. The created immunosensor was a wide linear range as 1 ag·mL−1 − 100 ng·mL−1 and a low limitation of detection as 0.1 fg·mL−1 under the optimal condition. This suggested that the immunosensor is considered to be an accurate and efficient diagnostic tool for CA125 and other biomarkers detection in actual sample analysis for clinic. © 2023 Elsevier B.V.

关键词： Antigens

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Predicting possible polymer sequences based on given adhesive free energies of polymer-surface interactions using deep learning

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Chemical Physics Letters 2025年

作者： Liyang Xu Yi Yang Bo Yin Liangjiang International College Chongqing University of Technology 459 Pufu Avenue Chongqing 401135 China College of Materials Science and Engineering Chongqing University of Technology No. 69 Hongguang Avenue Chongqing 401135 China College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering SichuanUniversity No. 24 South Section 1 Chengdu 610065 China

polymer structure design plays a pivotal role in a wide range of biological and industrial applications, particularly where precise control over surface adhesion is critical. In this study, we present a data-driven deep learning framework for the inverse design of polymer sequences with given target adhesive free energy ( Δ F ) on functionalized surfaces, using a conditional generative adversarial networks. Empirical evaluations demonstrate the predictive accuracy, robustness, and generalization capabilities of the framework. This work marks a novel solution in the application of deep learning for functional polymer design. It transitions from conventional forward modeling to scalable inverse sequence prediction, thereby enabling molecular-level control in bottom-up manufacturing and offering a generalizable pathway for the tailored property design of polymeric materials.

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Fat blockage and improved characteristics of Coated-Cassava chips using natural edible coating from carboxymethyl cellulose in Deep-Frying process 4

Fat blockage and improved characteristics of Coated-Cassava ...

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4th International Conference on Green Chemical engineering and technology: Materials Science, GCET 2019

作者： Hashim, Liyana Mat Ropi, Anis Alysha Alikasturi, Amin Safwan Anuar, Mohd. Razealy Safiei, Nor Zanariah Muhamad, Ida Idayu Mohd Jusoh, Yanti Maslina Shaharuddin, Shahrulzaman Section of Food Engineering Technology Universiti Kuala Lumpur Malaysian Institute of Chemical and Bioengineering Technology Lot 1988 Vendor City Taboh Naning Alor Gajah Melaka78000 Malaysia Department of Bioprocess and Polymer Engineering Faculty of Chemical and Energy Engineering Universiti Teknologi Malaysia Johor Bahru Johor81310 Malaysia

Production of the deep-fried cassava chips has contributed to high cooking oil waste production. The frying process could increases the lipid content and reduce the physical attributes of the chips. This research aimed to evaluate the effect of carboxymethyl cellulose (CMC) concentration (1, 2 and 3%) on the coated-fried cassava chips characteristics. A dipping-coating method was used and the characteristics evaluated were lipids content, colour measurement, texture, functional group and sensory analysis. All data were analysed using one-way ANOVA and Duncan multiple range test. Result showed 3% CMC could reduce the lipid content of chips up to 10%. Besides, the coated chips produced a better crispiness level as compared to uncoated chips. The colours were darker in the higher concentrations of CMC coated chips. FTIR spectra confirmed the presence of CMC coating on the coated sample. The coated chips showed a slightly higher sensory overall acceptability. Overall, the CMC-coated cassava chips reduced the lipid contents and improved physical properties of the snack. © 2020 Elsevier Ltd. All rights reserved.

关键词： Coatings

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Development of sodium alginate-pectin biodegradable active food packaging film containing cinnamic acid

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Chemosphere 2023年第1期336卷 139212页

作者： Tong, Woei Yenn Ahmad Rafiee, Abdu Raouf Leong, Chean Ring Tan, Wen-Nee Dailin, Daniel Joe Almarhoon, Zainab M. Shelkh, Mohamed Nawaz, Alam Chuah, Lai Fatt Universiti Kuala Lumpur Institute of Medical Science Technology A1 1 Jalan TKS 1 Taman Kajang Sentral Selangor Kajang43000 Malaysia Universiti Kuala Lumpur Malaysian Institute of Chemical and Bioengineering Technology Lot 1988 Kawasan Perindustrian Bandar Vendor Taboh Naning Alor Gajah Melaka Malaysia Chemistry Section School of Distance Education Universiti Sains Malaysia Minden Penang11800 Malaysia Institute of Bioproduct Development Universiti Teknologi Malaysia Johor Skudai81310 Malaysia Department of Bioprocess and Polymer Engineering Faculty of Chemical and Energy Engineering Universiti Teknologi Malaysia Johor Skudai81310 Malaysia Department of Chemistry College of Science King Saud University Riyadh11451 Saudi Arabia School of Chemical Engineering Yeungnam University Gyeongsan 712-749 Korea Republic of Faculty of Maritime Studies Universiti Malaysia Terengganu Terengganu Malaysia

Plastics are still the most popular food packaging material and many of them end up in the environment for a long period. Due to packaging material's inability to inhibit microbial growth, beef often contains microorganisms that affect its aroma, colour and texture. Cinnamic acid is categorized as generally recognised as safe and is permitted for use in food. The development of biodegradable food packaging film with cinnamic acid has never been conducted before. This present study was aimed to develop a biodegradable active packaging material for fresh beef using sodium alginate and pectin. The film was successfully developed with solution casting method. The films' thickness, colour, moisture level, dissolution, water vapour permeability, bending strength and elongation at break were comparable to those of polyethylene plastic film in terms of these attributes. The developed film also showed the degradability in soil of 43.26% in a duration of 15 days. Fourier Transform Infrared (FTIR) spectra showed that cinnamic acid was successfully incorporated with the film. The developed film showed significant inhibitory activity on all test foodborne bacteria. On Hohenstein challenge test, a 51.28–70.45% reduction on bacterial growth was also observed. The antibacterial efficacy of the established film by using fresh beef as food model. The meats wrapped with the film showed significant reduction in bacterial load throughout the experimental period by 84.09%. The colour of the beef also showed significant different between control film and edible film during 5 days test. Beef with control film turned into dark brownish and beef with cinnamic acid turn into light brownish. Sodium alginate and pectin film with cinnamic acid showed good biodegradability and antibacterial activity. Further studies can be conducted to investigate the scalability and commercial viability of this environmental-friendly food packaging materials. © 2023 Elsevier Ltd

关键词： Beef

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A Spontaneous In-Situ Thiol-Ene Crosslinking Hydrogel with Thermo-Responsive Mechanical Properties

SSRN

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SSRN 2024年

作者： Aerts, Andreas L. Vovchenko, Maxim Elahi, Seyed Ali Viñuelas, Rocío Castro De Maeseneer, Tess Purino, Martin A. Hoogenboom, Richard Van Oosterwyck, Hans Jonkers, Ilse Cardinaels, Ruth Smet, Mario Polymer Chemistry and Materials Laboratory of organic material synthesis Celestijnenlaan 200f - box 2404 Leuven3001 Belgium Celestijnenlaan 200f - box 2419 Leuven3001 Belgium Department of Physics and Astronomy Laboratory for Soft Matter and Biophysics Celestijnenlaan 200D box 2416 Leuven3001 Belgium Department of Movement Sciences Human Movement Biomechanics Research Group Tervuursevest 101 - box 1501 Leuven3001 Belgium Department of Mechanical Engineering Biomechanics Section Celestijnenlaan 300 Leuven3001 Belgium Department of Development and Regeneration Laboratory for Tissue Homeostasis and Disease Herestraat 49 box 813 Leuven3000 Belgium Department of Chemical Engineering Soft Matter Rheology and Technology Celestijnenlaan 200J - box 2424 Leuven3001 Belgium Ghent University Belgium KU Leuven Belgium

Poly(N-isopropylacrylamide), P(NiPAAm), is soluble at low temperature but undergoes a phase transition at temperatures above its transition temperature of 31 °C. This thermo-responsive behavior makes it an ideal candidate to easily embed cells and allows the polymer mixture to be injected. However, P(NiPAAm) hydrogels possess minor mechanical properties as they solely originate from weak hydrophobic interactions. To increase the mechanical properties, a covalent bond is introduced into the P(NIPAAm) network. A hydrogel was spontaneously formed by mixing two polymer solutions containing P(NiPAAm-co-HEAacr) and P(NiPAAm-co-Cys), forming a covalent crosslink through a biocompatible thiol-ene click-reaction, at low temperatures. Various co-polymers with variable thiol or acrylate groups to thermo-responsive co-monomer ratios, ranging from 1% to 10%, were synthesized. Precise control of the crosslink density allowed customization of the hydrogel’s mechanical properties to match different tissue stiffness levels. Increasing the temperature of the hydrogel above its transition temperature of 31 °C, induced the formation of additional physical interactions. These additional interactions both further increased the stiffness of the material and impacted its relaxation behavior. The developed hydrogels, with optimized functional monomer ratio, reach stiffnesses more than ten times higher compared to the state of the art using similar polymers. Furthermore, when adding cells to the precursor polymer solutions, homogeneous thermo-responsive hydrogels with good cell viability were created upon mixing. In future work, cells will be seeded inside this responsive material and by changing the incubation temperature the influence of the mechanical micro-environment on the cell’s behavior can be studied in-situ in a continuous manner. © 2024, The Authors. All rights reserved.

关键词： Hydrogels

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Regulating the Oxygen Vacancies in Ni-Ce x Zr 1-x O 2 /ZSM-5 to Improve the Long-term Stability for Methane Dry Reforming

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Chinese Journal of Structural Chemistry 2025年

作者： Zhuwei Yang Linsen Li Yijie Lin Xinyuan Tao Xiao Liu Lei Chen Ming Ma Li Lin Riguang Zhang Jiayuan Li Zhao Jiang State Key Laboratory of Fluorine & Nitrogen Chemicals School of Chemical Engineering and Technology Xi’an Jiaotong University Xi’an 710049 China Nuclear Power Institute of China 328 Changshun Avenue Section 1 Chengdu 610213 China State Key Laboratory of Clean and Efficient Coal Utilization Taiyuan University of Technology Taiyuan 030000 China Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology School of Chemistry and Chemical Engineering Northwestern Polytechnical University Xi’an 710072 China

Methane dry reforming (DRM) has gained significant attention as a promising route to convert two major greenhouse gases (CO 2 and CH 4 ) to syngas. The development of efficient catalysts is critical for the engineering applications. In this study, the Ce x Zr 1-x O 2 /ZSM-5 composites with different oxygen vacancy concentrations were synthesized by tuning the Ce/Zr ratio, followed by the deposition of metal Ni to the island-like Ce x Zr 1-x O 2 on the ZSM-5, forming a variety of Ni-Ce x Zr 1-x O 2 /ZSM-5 catalysts, which were applied for the methane dry reforming reaction under 750°C. Combined with various characterizations, it was found that the oxygen vacancy concentration illustrated the volcanic tendency with the decreased Ce/Zr ratio, and the interaction between metal Ni and Ce x Zr 1-x O 2 exhibited a positive relationship with oxygen vacancy concentration. The enhanced between Ni and Ce x Zr 1-x O 2 interaction could improve the strength and amount of Ni-O-M (M=Ce/Zr) species, making the d-band centers of catalysts closer to the Fermi energy level, which was beneficial to the CH 4 and CO 2 activation, along with the improved capacity to resist sintering and coking. Especially, the C 1 Z 3 (Ni-Ce 0.25 Zr 0.75 O 2 /ZSM-5) catalyst with the Ce/Zr ratio of 1/3 demonstrated the optimal catalytic performance with 91.9% CH 4 and 93.8% CO 2 conversions within 50 h, accompanied by the best structural and catalytic stability after 100 h. In-situ DRIFTS was employed to study the reaction path and mechanism, discovering that significant amounts of strengthened Ni-O-M species were conducive to activating adsorbed CH 4 and CO 2 , and desorbing the linear CO species.

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Donnan Effect Engineered Covalent Organic Framework Membranes Towards Sizes and Charges Based Precisely Molecular Sieving

SSRN

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SSRN 2022年

作者： Chen, Liye Cai, Ya-Juan Gai, Xiao-Tang Li, Yi-Bo Sun, Yi-Xing Jiang, Mengying Liu, Yang Wei, Nan-Jun Gai, Jing-Gang Gai, Yi-Nuo Qin, Jun Wang, Ze-Gang Cui, Li-Sheng Guo, Hu Zou, Qian Zhou, Tao State Key Laboratory of Polymer Materials Engineering Polymer Research Institute Sichuan University Sichuan Chengdu610065 China Sichuan Guojian Inspection Co. Ltd No. 17 Section 1 Kangcheng Road Jiangyang District Sichuan Luzhou646099 China Wuyuzhang Honors College Sichuan University Sichuan Chengdu610065 China Chengdu No. 7 Yucai Xuedao School Sichuan Chengdu610065 China Shandong Sun Paper Industry Joint-Stock Ltd Shandong Jining272100 China Shandong Chenzhong Machinery Ltd Shandong Zibo256400 China Shandong HFT Environmental Protection Technology Ltd Shandong Zibo256400 China

Covalent organic frameworks (COFs), with ordered pores and well-defined topology, are ideal materials for nanofiltration (NF) membranes because of their capacity of transcending the permeance/selectivity trade-off predicament. However, most reported COF-based membranes are focused on separating molecules with different sizes, resulting in the low selectivity to similar molecules with different charges. Here, the negatively charged COF layer was fabricated in-situ on microporous support for separation of molecules with different sizes and charges. Ultrahigh water permeance (216.56 L m-2 h-1 bar-1) was obtained because of the ordered pores and excellent hydrophilicity, which exceeds most membranes with similar rejections. For the first time, we used multifarious dyes with different sizes and charges, for the investigation of the selectivity behavior caused by the Donnan effect and size exclusion. Obtained membranes represent superior rejections to negatively and neutrally charged dyes larger than 1.3 nm. While positively charged dyes with a size of 1.6 nm can pass through the membrane, resulting in a separation of negative/positive mixed dyes with close molecular sizes. This strategy of combining Donnan effect and size exclusion in nano-porous materials may evolve into a generic platform for sophisticated separation. © 2022, The Authors. All rights reserved.

关键词： Nanofiltration membranes

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Strain-based monitoring system for ski poles with low impact on their total mass and inertia

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Procedia Manufacturing 2020年 52卷 187-192页

作者： Philip Johannes Steinbild Uwe Hentschel Andree Schwaar Martin Dannemann Niels Modler Axel Schürer André Wilhelm Institute of Lightweight Engineering and Polymer Technology Technische Universität Dresden Holbeinstraβe 3 01307 Dresden Germany Department of Endurance Sports Cross-Country Skiing Section Institute for Applied Training Science Marschnerstraβe 29 04109 Leipzig Germany

This paper focuses on the development of a fully integrated monitoring system for measuring mechanical loads and motions experienced by a cross-country ski pole. A specially developed miniaturised electronic system allows the integration of the monitoring system into the grip of the ski pole while increasing the mass of the pole only slightly. The digitalized measured data is send wirelessly to a smartphone and can be made available for coaches and scientists in real time. This technology can also be used in other applications involving strain measurements where the need for low mass and miniaturised electronics is given.

关键词： customised measuring electronics strain gauge wireless monitoring system cross-country skiing

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Willow-Leaf-Inspired Ultrahigh-Strength Anf/Cu Membranes for Advanced Electromagnetic Shielding, Sensing, and Thermal Management in Wearable Electronics

SSRN

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SSRN 2025年

作者： Cao, Yixuan Wang, Xiaotong Luo, Dawei Huang, Huizhi Yang, Shuangqiao National Key Laboratory of Advanced Polymer Materials Polymer Research Institute of Sichuan University No.24 South Section 1 Yihuan Road Chengdu610065 China School of materials science and engineering Xihua University Jinzhou Road Sichuan Chengdu610039 China Tianfu Yongxing Laboratory Chengdu610213 China Sichuan D&F Electrical Technology Co. LTD Zhonghua Road Jinshan Industrial Park Luogang Economic Development Zone Sichuan Deyang China

Electromagnetic interference (EMI) shielding materials are widely employed in electronic devices to prevent radiation damage and enable multifunctional integration. However, achieving a balance between high performance and low cost remains a significant challenge. Inspired by the bilayer structure of willow leaves, we present a flexible, ultrathin, high-strength multifunctional membrane composed of an upper copper nanowires/nanoparticles (CuNWs/CuNPs) conductive network and a lower aramid nanofiber (ANF) support layer. The CuNWs and CuNPs were synthesized via aqueous glucose reduction, with the CuNPs retained as bridging junctions to enhance network connectivity. 10 wt.% of ANF was incorporated into the upper CuNWs/CuNPs layer to intertwine with CuNWs and improve interfacial adhesion with the lower ANF layer. Sintering promotes the welding and fusion of CuNWs/CuNPs, improving the integrity of the conductive network. Benefiting from this hierarchical design, the membrane exhibits exceptional mechanical strength (tensile strength up to 166.9 MPa), high electrical conductivity (1.1×105 S/m at 36.9 wt.% Cu loading), and outstanding EMI shielding performance at a thickness of just 11.6 μm (SE/d=4612 dB·mm-1 and SSE/t=11152 dB·cm3·g-1). Additionally, it demonstrates efficient Joule heating (reaching >80°C within 10 s at 2.5 V) and stable piezoresistive sensing. These attributes make the multifunctional ANF/Cu membrane a promising candidate for lightweight wearable electronics and electrothermal therapy applications. © 2025, The Authors. All rights reserved.

关键词： Electromagnetic shielding

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Willow-leaf-inspired ultrahigh-strength ANF/Cu membranes for advanced electromagnetic shielding, sensing, and thermal management in wearable electronics

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Chemical engineering Journal 2025年 518卷

作者： Yixuan Cao Xiaotong Wang Dawei Luo Huizhi Huang Shuangqiao Yang State Key Laboratory of Advanced Polymer Materials (Sichuan University) Polymer Research Institute of Sichuan University No. 24 South Section 1 Yihuan Road Chengdu 610065 China School of materials science and engineering Xihua University Jinzhou Road Chengdu Sichuan 610039 China Sichuan D&F Electrical Technology Co. LTD Zhonghua Road Jinshan Industrial Park Luogang Economic Development Zone Deyang Sichuan China Tianfu Yongxing Laboratory Chengdu 610213 China

Electromagnetic interference (EMI) shielding materials are widely employed in electronic devices to prevent radiation damage and enable multifunctional integration. However, achieving a balance between high performance and low cost remains a significant challenge. Inspired by the bilayer structure of willow leaves, we present a flexible, ultrathin, high-strength multifunctional membrane composed of an upper copper nanowires/nanoparticles (CuNWs/CuNPs) conductive network and a lower aramid nanofiber (ANF) support layer. The CuNWs/CuNPs were synthesized via aqueous glucose reduction, with the CuNPs retained as bridging junctions to enhance network connectivity. 10 wt% of ANF was incorporated into the upper CuNWs/CuNPs layer to intertwine with CuNWs and improve interfacial adhesion with the lower ANF layer. Sintering promotes the welding and fusion of CuNWs/CuNPs, improving the integrity of the conductive network. Benefiting from this hierarchical design, the membrane exhibits exceptional mechanical strength (tensile strength up to 166.9 MPa), high electrical conductivity (1.1 × 10 5 S/m at 36.9 wt% Cu loading), and outstanding EMI shielding performance at a thickness of just 11.6 μm (SE/d = 4612 dB·mm −1 and SSE/ t = 11,152 dB·cm 3 ·g −1 ). Additionally, it demonstrates efficient Joule heating (reaching > 80 °C within 10 s at 2.5 V) and stable piezoresistive sensing. These attributes make the multifunctional ANF/Cu membrane a promising candidate for lightweight wearable electronics and electrothermal therapy applications.

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