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Detecting mercury ions in water using a low-cost colorimetric sensor derived from immobilized silver nanoparticles on a paper substrate

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environmental Nanotechnology, Monitoring and Management 2022年 18卷

作者： Budlayan, Marco Laurence Dalagan, Jhonnybert Lagare-Oracion, Jeanne Phyre Patricio, Jonathan Arco, Susan Latayada, Felmer Vales, Temmy Baje, Benito Alguno, Arnold Capangpangan, Rey Department of Physics School of Science and Engineering Ateneo de Manila University Quezon City 1108 Philippines Department of Chemistry Caraga State University Butuan City 8600 Philippines Materials Science and Polymer Chemistry Laboratory Caraga State University Butuan City 8600 Philippines Materials Science Engineering Program College of Science University of the Philippines Diliman Quezon City 1101 Philippines Synthetic Organic Chemistry Laboratory Institute of Chemistry University of the Philippines Diliman Quezon City 1101 Philippines Physics Unit Philippine Science High School Central Visayas Campus Talaytay Argao 6021 Cebu Philippines Department of Physics Mindanao State University-Iligan Institute of Technology Tibanga Iligan City 9200 Philippines Department of Physical Sciences and Mathematics College of Marine and Allied Sciences Mindanao State University at Naawan Poblacion Naawan 9023 Misamis Oriental Philippines

The exceptional and specific reactivity of mercury ions (Hg2+) toward plasmonic silver nanoparticles (AgNPs) in aqueous media has motivated the need to develop innovative, low-cost, portable, and robust sensors to hel... 详细信息

The exceptional and specific reactivity of mercury ions (Hg²⁺) toward plasmonic silver nanoparticles (AgNPs) in aqueous media has motivated the need to develop innovative, low-cost, portable, and robust sensors to help address the detrimental effects of heavy metal contamination particularly in rural communities. In this paper, we present the plasmonic and colorimetric sensing of Hg²⁺ using a paper-based sensing material derived from thiamine-functionalized (ThAgNPs) that were immobilized on a commercial filter paper. Plasmonic AgNPs with a surface plasmon resonance peak at 420 nm and a size of about 21.3 nm were synthesized by a chemical reduction technique. Fourier transform infrared spectroscopy revealed the characteristic functional groups of thiamine in the spectra of AgNPs, thereby confirming the functionalization of AgNPs. The successful integration of ThAgNPs onto the Whatman filter paper (WFP) matrix was confirmed by the UV–vis and SEM-EDX results. An evident color change from yellowish to white was manifested by the fabricated WFP-ThAgNP sensor in the presence of Hg²⁺ with an appreciable detection of up to 0.5 µM using the naked eye. The colorimetric response of the sensor was also found to be selective towards Hg²⁺ after testing with different metal ions. Moreover, the response was consistent for tap, and creek water samples spiked with Hg²⁺. The results of this work provide a promising baseline technology for the development of an affordable, fast, portable, and reliable sensor that can be used for on-site detection and monitoring of Hg²⁺ levels in the water. © 2022 Elsevier B.V.

关键词： Colorimetric sensor Mercury detection Paper-based device Silver nanoparticle Thiamine

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Rapid Access to Diverse Multicomponent Hierarchical Nanostructures from Mixed-Graft Block Copolymers

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Angewandte Chemie 2022年第41期134卷

作者： Ruiqi Liang Qingliang Song Ruipeng Li An N. Le Xiaowei Fu Yazhen Xue Xiaoyu Ji Weihua Li Mingjiang Zhong Department of Chemical and Environmental Engineering Yale University New Haven CT 06520 USA State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai 200438 China National Synchrotron Light Source II Brookhaven National Laboratory Upton NY 11973 USA State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Chengdu 610065 China Department of Chemistry Yale University New Haven CT 06520 USA

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Anharmonicity and Universal Response of Linear Carbon Chain Mechanical Properties under Hydrostatic Pressure

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Physical Review Letters 2020年第10期125卷 105501-105501页

作者： Keshav Sharma Nathalia L. Costa Yoong Ahm Kim Hiroyuki Muramatsu Newton M. Barbosa Neto Luiz G. P. Martins Jing Kong Alexandre Rocha Paschoal Paulo T. Araujo Department of Physics and Astronomy University of Alabama Tuscaloosa Alabama 35487 USA Department of Physics Federal University of Ceara 60455-760 Fortaleza Ceara Brazil Department of Polymer Engineering School of Polymer Science and Engineering and Alan G. MacDiarmid Energy Research Institute Chonnam National University 77 Yongbong-ro Buk-gu Gwangju 61186 Republic of Korea Research Institute for Supra-Materials Shinshu University 4-17-1 Wakasato Nagano Japan Institute of Natural Sciences Graduate Program in Physics Federal University of Para 66075-110 Belem PA Brazil Department of Physics Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA

Isolated linear carbon chains (LCCs) encapsulated by multiwalled carbon nanotubes are studied under hydrostatic pressure (P) via resonance Raman scattering. The LCCs’ spectroscopic signature C band around 1850 cm−1 softens linearly with increasing P. A simple anharmonic force-constant model not only describes such softening but also shows that the LCCs’ Young’s modulus (E), Grüneisen parameter (γ), and strain (ϵ) follow universal P−1 and P2 laws, respectively. In particular, γ also presents a unified behavior for all LCCs. To the best of our knowledge, these are the first results reported on such isolated systems and the first work to explore universal P-dependent responses for LCCs’ E, ϵ, and γ.

关键词： Anharmonic lattice dynamics Compressive strength Elasticity Mechanical & acoustical properties Pressure effects Stress 1-dimensional systems Lattice models in condensed matter Pressure techniques Raman spectroscopy

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Correction: Influence of shape on crystal structure and optical properties of heterocyclic conjugated molecules

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Journal of Materials Chemistry C 2025年第10期13卷 5385-5385页

作者： Elisa Guzmán Yu Yan Peter Müller Justin Amengual Chung-Hao Liu Mu-Ping Nieh Department of Chemistry Tufts University 62 Talbot Ave Medford MA 02155 USA Department of Chemistry Massachusetts Institute of Technology Cambridge MA 02139 USA Polymer Program Institute of Materials Science University of Connecticut 25 King Hill Road Storrs CT 06269-3136 USA Department of Chemical & Biomolecular Engineering University of Connecticut – Storrs 97 North Eagleville Road Unit 3136 Storrs CT-06269-3136 USA

Correction for ‘Influence of shape on crystal structure and optical properties of heterocyclic conjugated molecules’ by Elisa Guzmán et al., J. Mater. Chem. C, 2025, 13, 954–962, https://***/10.1039/D4TC03509G.

Correction for ‘Influence of shape on crystal structure and optical properties of heterocyclic conjugated molecules’ by Elisa Guzmán et al., J. Mater. Chem. C, 2025, 13, 954–962, https://***/10.1039/D4TC03509G.

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Temperature-responsive self-assembly Nanochaperone protects Green Fluorescent Proteins from Thermal denaturation

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Supramolecular Materials 2024年第1期3卷 100067-100067页

作者： Zhao, Shuyue Li, Bingqiang Song, Yiqing Wu, Shian Hu, Haodong Wang, Jianzu Shi, Linqi Huang, Fan State Key Laboratory of Medicinal Chemical Biology Key Laboratory of Functional Polymer Materials of Ministry of Education College of Chemistry Nankai University Tianjin 300071 China Department of Cardiology Tianjin NanKai Hospital Tianjin 300100 China State Key Laboratory of Medicinal Chemical Biology and College of Life Sciences Nankai University Tianjin 300071 China State Key Laboratory of Separation Membranes and Membrane Processes School of Environmental Science and Engineering Tiangong University Tianjin 300387 China State Key Laboratory of Advanced Medical Materials and Devices Tianjin Key Laboratory of Radiation Medicine and Molecular Nuclear Medicine Key Laboratory of Radiopharmacokinetics for Innovative Drugs Tianjin Institutes of Health Science Institute of Radiation Medicine Chinese Academy of Medical Sciences & Peking Union Medical College Tianjin 300192 China

Protein products perform important roles in the biochemistry field, but the thermal inactivation of proteins will increase the difficulty of their transport, storage and application. Therefore, improving the thermal stability of proteins has become a thorny challenge. Natural molecular chaperones can efficiently improve the resistance of proteins to environmental stimuli by reversible supramolecular assembly with proteins. Inspired by this machine, herein we designed a nanochaperone (nChap) with thermo-responsive amphiphilic surfaces that can prevent thermal denaturation and facilitate refolding of green fluorescent proteins (GFPs). By mimicking the hydrophobic microregion of natural chaperones, this nChap can effectively capture free GFPs and hide them into surface confined spaces, thereby shielding exposed hydrophobic sites of GFPs and preventing their irreversible thermal aggregation. When the heat stimulation disappeared, the thermosensitive segments of the nChaps underwent the hydrophilic transition, which provided suitable microenvironments for GFPs refolding. More importantly, nChaps could also actively adsorb to the surface of immobilized GFPs at high temperatures and realize the satisfactory dissociation of the nChap-protein complex upon cooling, which exhibited excellent chaperone-like activity. This work provides significant insights for understanding and developing strategies to improve protein stability. © 2024 The Authors

关键词： Chaperone Green fluorescent protein Protein refolding Self-assembly Thermal denaturation

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Solvent-Free Synthesis of Tio2 Nanoparticles Embedded Mwcnts with Enhanced Photocatalytic Activity for Bacterial Disinfection

SSRN

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SSRN 2024年

作者： Kim, Tae Hyeong Yoo, Sunghoon Kim, Woongsub Jeong, Eunhoo Leem, Gyu Hong, Seok Won Lee, Seunghyun Department of Applied Chemistry Hanyang University 55 Hanyangdaehak-ro Sangnok-gu Gyeonggi-do Ansan-si15588 Korea Republic of Center for Bionano Intelligence Education and Research Hanyang University 55 Hanyangdaehak-ro Sangnok-gu Gyeonggi-do Ansan-si15588 Korea Republic of 5 Hwarang-ro 14-gil Seongbuk-gu Seoul02792 Korea Republic of Department of Chemistry State University of New York College of Environmental Science and Forestry 1 Forestry Drive SyracuseNY13210 United States Institute for Sustainable Materials and Manufacturing 1 Forestry Drive SyracuseNY13210 United States Department of Chemical and Molecular Engineering Hanyang University 55 Hanyangdaehak-ro Sangnok-gu Gyeonggi-do Ansan-si15588 Korea Republic of The Michael M. Szwarc Polymer Research Institute 1 Forestry Drive SyracuseNY13210 United States Seoul National University Korea Republic of

Composites of metal nanoparticles (NPs) and carbon nanomaterials offer synergistic advantages from each component. Typical carbon nanotube (CNT) composites have particles affixed to the outer surface of the CNTs. A unique structure encapsulating TiO2 NPs within the inner space of multi-walled carbon nanotubes (MWCNTs) was developed via a facile, solvent-free method, conforming to green chemistry principles;the photocatalytic properties were confirmed. Except purification and modification of the CNTs, the particle formation process is solvent-free, making this method remarkably simple and environmentally friendly, as a notable advantage. The unique arrangement of the NPs within the channel renders them resistant to external forces, resulting in high stability and reusability. The crystalline phase of the TiO2 NPs, confirmed through X-ray diffraction (XRD), was controlled by varying the reaction temperature. The defects in the outer walls of the MWCNTs in the composite, coupled with their large specific surface area and dangling bonds, endow them with high adsorption capacity and photocatalytic activity when combined with TiO2 NPs. The MWCNTs@TiO2 nanocomposites were utilized for photocatalytic inactivation of Escherichia coli and bacteriophage MS2 and dye adsorption/decomposition. This innovative catalytic process offers a distinctive platform for photocatalytic degradation in biological applications and water treatment. © 2024, The Authors. All rights reserved.

关键词： Sustainable chemistry

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Potential targeting of the tumor microenvironment to improve cancer virotherapy

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Pharmacology and Therapeutics 2023年第1期250卷 108521页

作者： Liao, Zi-Xian Hsu, Shan-hui Tang, Shiue-Cheng Kempson, Ivan Yang, Pan-Chyr Tseng, S. Ja Institute of Medical Science and Technology National Sun Yat-sen University Kaohsiung 80424 Taiwan Institute of Polymer Science and Engineering National Taiwan University Taipei 10051 Taiwan Institute of Biotechnology National Tsing Hua University Hsinchu Taiwan Department of Medical Science National Tsing Hua University Hsinchu Taiwan Future Industries Institute University of South Australia Mawson Lakes 5095 SA Australia Department of Internal Medicine National Taiwan University College of Medicine Taipei 10051 Taiwan Graduate Institute of Oncology National Taiwan University College of Medicine Taipei 10051 Taiwan National Taiwan University YongLin Institute of Health National Taiwan University Taipei 10051 Taiwan Program in Precision Health and Intelligent Medicine Graduate School of Advanced Technology National Taiwan University Taipei 10051 Taiwan

In 2015, oncolytic virotherapy was approved for clinical use, and in 2017, recombinant adeno-associated virus (AAV) delivery was also approved. However, systemic administration remains challenging due to the limited number of viruses that successfully reach the target site. Although the US Food and Drug Administration (FDA) permits the use of higher doses of AAV to achieve greater rates of transduction, most AAV still accumulates in the liver, potentially leading to toxicity there and elsewhere. Targeting the tumor microenvironment is a promising strategy for cancer treatment due to the critical role of the tumor microenvironment in controlling tumor progression and influencing the response to therapies. Newly discovered evidence indicates that administration routes focusing on the tumor microenvironment can promote delivery specificity and transduction efficacy within the tumor. Here, we review approaches that involve modifying viral surface features, modulating the immune system, and targeting the physicochemical characteristics in tumor microenvironment to regulate therapeutic delivery. Targeting tumor acidosis presents advantages that can be leveraged to enhance virotherapy outcomes and to develop new therapeutic approaches that can be integrated with standard treatments. © 2023 Elsevier Inc.

关键词： Adeno-associated virus Intratumoral injection Oncolytic virotherapy Systemic circulation Tumor acidosis Tumor microenvironment

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Digital twin technology advancing industry 4.0 and industry 5.0 across sectors

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Results in engineering 2025年 26卷

作者： Ocident Bongomin Mwewa Chikonkolo Mwape Nonsikelelo Sheron Mpofu Brendah Kembabazi Bahunde Richard Kidega Ibrahim Luqman Mpungu Godias Tumusiime Cynthia Awuor Owino Yannick Marnaigue Goussongtogue Aregawi Yemane Proscovia Kyokunzire Clement Malanda Jimmy Komakech Dan Tigalana Onesmas Gumisiriza George Ngulube Department of Mechanical Engineering Faculty of Engineering and Survey Ndejje University P.O. Box 7088 Kampala Uganda Department of Manufacturing Textile and Industrial Engineering School of Engineering Moi University P.O. Box 30100-3900 Eldoret Kenya Egypt Solid Waste Management Center of Excellence Faculty of Engineering Ain Shams University Cairo 11566 Egypt Department of Agricultural and Biosystems Engineering University of Kassel Nordbahnhoftstraße 1a Witzenhausen 37213 Germany Department of Crop Inspection and Certification Ministry of Agriculture Animal Industry and Fisheries P.O Box 102 Entebbe Uganda Department of Mining Engineering Faculty of Engineering and Technology Busitema University P.O. Box 236 Tororo Uganda Department of Mining and Mineral Processing Engineering School of Mines and Engineering Taita Taveta University P.O. Box 635-80300 Voi Kenya Department of Technical Teacher and Instructor Education School of Education Kyambogo University P.O. Box 1 Kyambogo Kampala Uganda Department of Polymer Textile and Industrial Engineering Faculty of Engineering and Technology Busitema University P.O. Box 236 Tororo Uganda Department of Electrical and Computer Engineering School of Engineering Makerere University P.O. Box 7062 Kampala Uganda Department of Civil and Structural Engineering School of Engineering Moi University P.O. Box 30100-3900 Eldoret Kenya Department of Industrial Engineering School of Mechanical and Industrial Engineering Mekelle University Mekelle Ethiopia Department of Polymer Engineering Graduate School Chonnam National University Gwangju 61186 South Korea Department of Applied Studies Malawi University of Science and Technology P.O. Box 5196 Limbe Malawi College of Education and Human Development Western Michigan University 1903W MI United States Department of Oil and Gas Industry Facility Design and Construction Faculty of Pipeline Construction Ufa State Petroleum Technological University 450064 Street Kosmo

Digital Twin (DT) technology is transforming industrial systems by integrating physical assets with digital models, enabling real-time monitoring, predictive analytics, and process optimization, particularly within the framework of Industry 4.0 (I4.0). As the global industrial landscape shifts toward Industry 5.0 (I5.0), DTs are increasingly being redefined to support human-centric innovation, sustainability, and system resilience. This review examines the evolving role of DTs in bridging the efficiency-driven goals of I4.0 with the inclusive, sustainable objectives of I5.0. It explores ten enabling technologies such as artificial intelligence (AI), internet of things, blockchain, cloud and edge computing, and extended reality, while discussing both the opportunities and challenges posed by I5.0. The study emphasizes key principles of DTs, including real-time synchronization, feedback mechanisms, and lifecycle integration. A detailed sectorial analysis across manufacturing, infrastructure, energy, transportation, mining, agriculture, and healthcare illustrates how DTs are being applied in diverse contexts to enhance operational efficiency, product quality, and decision-making. The mapping of applications by country, sector, and industrial focus reveals growing trends toward I5.0 in areas such as logistics and infrastructure. Common application domains include monitoring, optimization, prediction, and decision support. Despite their potential, DT adoption faces challenges including high implementation costs, data integration issues, cybersecurity concerns, and lack of standardization. The review discusses these barriers alongside the importance of validation and security for trusted deployment. It concludes by identifying future directions, including cognitive twins, industrial metaverse integration, and ethical AI. DTs are positioned as foundational technologies for advancing sustainable, resilient, and human-centered industrial systems.

关键词： Digital twins Industry 4.0 Industry 5.0 Human-centric innovation Sustainability Artificial intelligence Predictive analytics

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Structural modification of carbon black for improving the dielectric performance of epoxy based composites

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Advanced Industrial and engineering polymer Research 2018年第1期1卷 111-117页

作者： Wang, Xin Li, Zewei Chen, Zhiwu Zeng, Lanying Sun, Luyi School of Materials Science and Engineering South China University of Technology Guangzhou China Polymer Program Institute of Materials Science and Department of Chemical & Biomolecular Engineering University of Connecticut Storrs CT United States

To explore a feasible strategy for improving the dielectric properties of carbon black (CB)/epoxy composites, CB@TiO2 core-shell particles and CB-SiO2 hybrid particles were prepared and incorporated into epoxy. The microstructures of CB, CB@TiO2, and CB-SiO2 particles, as well as the dielectric properties of their epoxy-based composites were investigated. The results showed that the composites containing CB-SiO2 hybrid particles possessed a higher dielectric constant than the ones containing pristine CB. The dielectric constant of the composite with 20.0 vol% CB-SiO2 reached 52.68 (1 kHz), which was ca. 4 times greater than that of the one containing 20.0 vol% pristine CB. Meanwhile, the composites containing CB@TiO2 core-shell particles exhibited suppressed values of dielectric loss. The permittivity of the composite with 20.0 vol% CB@TiO2 reached 19.52 (1 kHz), while its dielectric loss remained low (0.047 at 1 kHz). These results indicated that the dielectric properties of epoxy composites could be enhanced with the introduction of modified fillers. © 2018 Kingfa SCI. & TECH. CO., LTD.

关键词： Carbon black

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Tillandsia-Inspired Asymmetric Covalent Organic Framework Membranes for Unidirectional Low-Friction Water Collection

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Angewandte Chemie 2024年第7期137卷

作者： Jiaao Yao Hongyu Zuo Jingjie Bi Yanjun Liu Huiqing Wu Jiayin Yuan Yiwang Chen Yaozu Liao Weiyi Zhang State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University Shanghai 201620 China Key Laboratory of Science & Technology of Eco-Textile Ministry of Education College of Chemistry Chemical Engineering and Biotechnology Center for Advanced Low-Dimension Materials Donghua University Shanghai 201620 China Department of Materials and Environmental Chemistry Stockholm University Stockholm 10691 Sweden Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education Jiangxi Normal University Nanchang 330022 China

Friction plays a pivotal role in many phenomena of physical chemistry and has long been in the focus of research thereof. As a crucial parameter, friction in membranes’ inner and/or outer surface can be minimized to reduce solvent inlet resistance and enlarge inner pore fluid flux, ideally reaching near frictionless transport of water at nanoscale. Inspired by the leaf structure of Tillandsia, a porous membrane with a rough surface and a hydrophilic inlet together with hydrophobic pore channels was designed and fabricated, based on covalent organic frameworks (COFs). Combined with COFs’ inherent highly oriented pore structures, the as-made asymmetric membranes through chemical etching can minimize the solvent critical intrusion pressure and enable inner pore low friction water transport. Ultimately, obtained COF membranes succeeded in trapping fog from air and achieved a water harvesting rate (WHR) of 1570 mg cm −2 h −1 , together with small molecular pollutants filtrated off in the meantime. Intriguingly, the synthesized asymmetric COF membranes illustrated unidirectional low friction water collecting and transporting features, the successful imitation of T. macdougallii . This work presents a practical strategy to construct functional porous membranes for low friction water collection and transport, and created a model paradigm to design fluid transporting pore channels.

关键词： low-friction water transport Tillandsia-inspired structure asymmetric covalent organic framework membrane unidirectional water collection

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