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arXiv 2022年

作者： Li, Huanan Yin, Shixiong He, Huan Xu, Jingjun Alù, Andrea Shapiro, Boris MOE Key Laboratory of Weak-Light Nonlinear Photonics School of Physics Nankai University Tianjin300071 China Photonics Initiative Advanced Science Research Center City University of New York New YorkNY10031 United States Department of Electrical Engineering City College of The City University of New York New YorkNY10031 United States Physics Program Graduate Center City University of New York New YorkNY10016 United States Department of Physics Technion-Israel Institute of Technology Haifa32000 Israel

Time metamaterials exhibit a great potential for wave manipulation, drawing increasing attention in recent years. Here, we explore the exotic wave dynamics of an anisotropic photonic time crystal (APTC), formed by an anisotropic medium whose optical properties are uniformly and periodically changed in time. Based on a temporal transfer matrix formalism, we show that a stationary charge embedded in an APTC emits radiation, in contrast to the case of isotropic photonic time crystals, and its distribution in momentum space is controlled by the APTC band structure. Our approach extends the functionalities of time metamaterials, offering new opportunities for radiation generation and control, with implications for both classical and quantum applications. Copyright © 2022, The Authors. All rights reserved.

关键词： Metamaterials

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Cavity-mediated superthermal phonon correlations in the ultrastrong coupling regime

arXiv

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arXiv 2024年

作者： Kim, Dasom Hou, Jin Lee, Geon Agrawal, Ayush Kim, Sunghwan Zhang, Hao Bao, Di Baydin, Andrey Wu, Wenjing Tay, Fuyang Huang, Shengxi Chia, Elbert E.M. Kim, Dai-Sik Seo, Minah Mohite, Aditya D. Hagenmüller, David Kono, Junichiro Applied Physics Graduate Program Smalley–Curl Institute Rice University HoustonTX77005 United States Department of Electrical and Computer Engineering Rice University HoustonTX77005 United States Department of Materials Science and NanoEngineering Rice University HoustonTX77005 United States Sensor System Research Center Korea Institute of Science and Technology Seoul02792 Korea Republic of Department of Physics and Astronomy Seoul National University Seoul08826 Korea Republic of Department of Chemical and Biomolecular Engineering Rice University Houston77005 United States Ulsan44919 Korea Republic of Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Singapore637371 Singapore Smalley–Curl Institute Rice University HoustonTX77005 United States Rice Advanced Materials Institute Rice University HoustonTX77005 United States KU–KIST Graduate School of Converging Science and Technology Korea University Seoul02841 Korea Republic of Université de Strasbourg CNRS Strasbourg67200 France Department of Physics and Astronomy Rice University HoustonTX77005 United States

Phonons, or vibrational quanta, are behind some of the most fundamental physical phenomena in solids, including superconductivity, Raman processes, and broken-symmetry phases. It is therefore of fundamental importance to find ways to harness phonons for controlling these phenomena and developing novel quantum technologies. However, the majority of current phonon control techniques rely on the use of intense external driving fields or strong anharmonicities, which restricts their range of applications. Here, we present a scheme for controlling the intensity fluctuations in phonon emission at room temperature based on multimode ultrastrong light–matter coupling. The multimode ultrastrong coupling regime is achieved by coupling two optical phonon modes in lead halide perovskites to an array of nanoslots, which operates as a single-mode cavity. The extremely small mode volume of the nanoslots enables unprecedented coupling strengths in a cavity phonon-polariton system. In the far-detuned, low-cavity-frequency regime, we demonstrate that the nanoslot resonator mediates an effective coupling between the phonon modes, resulting in superthermal phonon bunching in thermal equilibrium, both within the same mode and between different modes. Experimental results are in good agreement with a multimode Hopfield model. Our work paves the way for the tailoring of phonons to modify charge and energy transport in perovskite materials, with potential applications in light-collecting or emitting devices. Copyright © 2024, The Authors. All rights reserved.

关键词： Perovskite

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High-efficiency and ultrastable solvent-free curable perovskite quantum dot inks for microLED and LED backlighting applications

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Nano Energy 2025年 142卷

作者： Loan Thi Ngo Yu-Ting Huang Cheng-Chieh Chang Hemant Verma Yen-Huei Lin Ching-Tai Kuo Ying-Chih Liao Chao-Cheng Kaun Ren-Jei Chung Ru-Shi Liu Department of Chemistry National Taiwan University Taipei 106 Taiwan Nano Science and Technology Program Taiwan International Graduate Program Academia Sinica and National Taiwan University Academia Road 128 Nankang Taipei 115 Taiwan Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei 106 Taiwan Department of Physics National Taiwan University Taipei 106 Taiwan Research Center for Applied Sciences Academia Sinica Academia Road 128 Section 2 Nangang Taipei 11529 Taiwan Department of Chemical Engineering National Taiwan University Taipei 106 Taiwan

Metal lead halide perovskite quantum dots (PeQDs) exhibit exceptional optoelectronic properties, showing promise as components for solar cells, lighting, display, and anticounterfeiting devices. However, the instability of PeQDs, along with synthesis and storage methods that rely on hazardous solvents, has limited their potential for commercial applications. To overcome these obstacles, we introduce a solvent-free method for fabricating high-quality green and red CsPbX 3 PeQD (X = Br, I) ink. Using a fluidic system, we first obtained super-high photoluminescence quantum yield PeQDs (92 % for red CsPb(Br,I) 3 , and nearly 100 % for green CsPbBr 3 PeQDs). The uniform nonsolvent PeQD ink is fabricated by modifying the as-formed PeQD surface with a mixture of trimethoxysilane and 3-(trimethoxysilyl)propyl methacrylate silane coupling agents to form PeQDs@silane, then dispersing the PeQDs@silane in a UV-curable 1,6-hexanediol diacrylate monomer. Our solvent-free PeQD ink exhibits bright and stable green and red emissions with long-term stability, retaining 100 % PL intensity after 115 days for CsPbBr 3 and 78 days for CsPb(Br,I) 3 . The environment-friendly ink enables highly uniform and bright films for LED backlighting and patterns for micro-LED applications. With color coordinates near the red and green reference values, the PeQD films demonstrate a remarkable 100.28 % color gamut coverage in comparison with Rec. 2020. This scalable and environmentally friendly method provides a safer alternative than conventional solvent-based PeQD ink.

关键词： Nanocrystals

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The Process We Call Earth: Relationships Between Dynamic Feedbacks and the Search for Gaiasignatures in a New Paradigm of Earthlikeness

Perspectives of Earth and Space Scientists

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Perspectives of Earth and Space Scientists 2024年第1期5卷

作者： Michael L. Wong Marissa Duckett Emilia S. Hernandez Vahab Rajaei Kayla J. Smith Earth and Planets Laboratory Carnegie Institution for Science Washington DC USA NASA Hubble Fellowship Program Space Telescope Science Institute Baltimore MD USA M. L. Wong Population Biology Ecology and Evolution Graduate Program Graduate Division of Biological & Biomedical Sciences Emory University Atlanta GA USA Department of Earth and Planetary Sciences University of California Davis Davis CA USA Alaska Center for Energy and Power University of Alaska Fairbanks Fairbanks AK USA School of Chemistry and Biochemistry Georgia Institute of Technology Atlanta GA USA NASA Center for the Origins of Life Georgia Institute of Technology Atlanta GA USA Environmental Engineering Program Department of Water Resources Management Central State University Wilberforce OH USA

Standard notions of an “Earthlike” planet rely solely on physical and material properties, like planetary mass, radius, and surface temperature. Here, we introduce a novel, relational perspective on what defines “Earthlikeness.” In our process-based framework, rocky planets are local pockets of free energy that have the potential to drive the emergence of dynamically persistent systems that coevolve with one another. Examples of dynamically persistent planetary phenomena include magnetic dynamos, mantle convection, tectonic regimes, deep volatile cycles, global climate feedbacks, biogeochemical cycles, and the biosphere. When two or more processes couple to one another such that they gain causal efficacy over one another's persistence, some degree of planetary-scale homeostasis may emerge. In astrobiology, Earthlike exoplanets are often considered to be priority targets for the search for life elsewhere. We suggest that a process-based framework for Earthlikeness has the potential to widen our search space and inspire novel planetary-scale biosignatures, or “Gaiasignatures,” that may be essential for detecting exoplanetary biospheres. Additionally, a process-based view of life can influence the development of agnostic biosignatures at all scales. In contrast to the dominant scientific perspective, which has tended to engender a materialistic worldview, relational ontologies may contribute to our scientific understanding of Earth as a network of dynamically persistent systems, humanity as an integral part of nature, and the search for life in the universe. A process-based framework may offer a better gauge of a planetary body's degree of “Earthlikeness” than physical or material considerations The search for life on exoplanets may require looking for “Gaiasignatures”—signs of a biosphere coupling with its geosphere in a dynamically persistent fashion By virtue of contrasting with dominant scientific worldviews, the ontology of relationality intrinsic to a process-bas

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The effects of surface fossil magnetic fields on massive star evolution: V. Models at low metallicity

arXiv

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arXiv 2024年

作者： Keszthelyi, Z. Puls, J. Chiaki, G. Nagakura, H. Ud-Doula, A. Takiwaki, T. Tominaga, N. Center for Computational Astrophysics Division of Science National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka Tokyo181-8588 Japan LMU München Universitätssternwarte Scheinerstr. 1 München81679 Germany National Institute of Technology Kochi College 200-1 Monobe Kochi Nankoku783-8508 Japan Penn State Scranton 120 Ridge View Drive DunmorePA18512 United States Astronomical Science Program Graduate Institute for Advanced Studies SOKENDAI 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Department of Physics Faculty of Science and Engineering Konan University 8-9-1 Okamoto Hyogo Kobe658-8501 Japan

At metallicities lower than that of the Small Magellanic Cloud, it remains essentially unexplored how fossil magnetic fields, forming large-scale magnetospheres, could affect the evolution of massive stars, thereby impacting the fundamental building blocks of the early Universe. We extend our stellar evolution model grid with representative calculations of main-sequence, single-star models with initial masses of 20 and 60 M☉, including appropriate changes for low-metallicity environments (Z = 10−3–10−6). We scrutinise the magnetic, rotational, and chemical properties of the models. When lowering the metallicity, the rotational velocities can become higher and the tendency towards quasi-chemically homogeneous evolution increases. While magnetic fields aim to prevent the development of this evolutionary channel, the weakening stellar winds lead to less efficient magnetic braking in our models. Since the stellar radius is almost constant during a blueward evolution caused by efficient chemical mixing, the surface magnetic field strength remains unchanged in some models. We find core masses at the terminal-age main sequence between 22 and 52 M☉ for initially 60 M☉ models. This large difference is due to the vastly different chemical and rotational evolution. We conclude that in order to explain chemical species and, in particular, high nitrogen abundances in the early Universe, the adopted stellar models need to be under scrutiny. The assumptions regarding wind physics, chemical mixing, and magnetic fields will strongly impact the model predictions. © 2024, CC BY.

关键词： Giant stars

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Input optics systems of the KAGRA detector during O3GK (vol 2023, 023F01, 2023)

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PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS 2023年第5期2023卷

作者： Akutsu, T. Ando, M. Arai, K. Arai, Y. Araki, S. Araya, A. Aritomi, N. Asada, H. Aso, Y. Bae, S. Bae, Y. Baiotti, L. Bajpai, R. Barton, M. A. Cannon, K. Cao, Z. Capocasa, E. Chan, M. Chen, C. Chen, K. Chen, Y. Chiang, C-I Chu, H. Chu, Y-K Eguchi, S. Enomoto, Y. Flaminio, R. Fujii, Y. Fujikawa, Y. Fukunaga, M. Fukushima, M. Furuhata, T. Gao, D. Ge, G-G Ha, S. Hagiwara, A. Haino, S. Han, W-B Hasegawa, K. Hattori, K. Hayakawa, H. Hayama, K. Himemoto, Y. Hiranuma, Y. Hirata, N. Hirose, E. Hong, Z. Hsieh, B-H Huang, G-Z Huang, H-Y Huang, P. Huang, Y-C Huang, Y-J Hui, D. C. Y. Ide, S. Ikenoue, B. Imam, S. Inayoshi, K. Inoue, Y. Ioka, K. Ito, K. Itoh, Y. Izumi, K. Jeon, C. Jin, H-B Jung, K. Jung, P. Kaihotsu, K. Kajita, T. Kakizaki, M. Kamiizumi, M. Kanbara, S. Kanda, N. Kang, G. Kataoka, Y. Kawaguchi, K. Kawai, N. Kawasaki, T. Kim, C. Kim, J. Kim, J. C. Kim, Ws Kim, Y-M Kimura, N. Kita, N. Kitazawa, H. Kojima, Y. Kokeyama, K. Komori, K. Kong, A. K. H. Kotake, K. Kozakai, C. Kozu, R. Kumar, R. Kume, J. Kuo, C. Kuo, H-S Kuromiya, Y. Kuroyanagi, S. Kusayanagi, K. Kwak, K. Lee, H. K. Lee, H. W. Lee, R. Leonardi, M. Li, K. L. Lin, L. C-C Lin, C-Y Lin, F-K Lin, F-L Lin, H. L. Liu, G. C. Luo, L-W Majorana, E. Marchio, M. Michimura, Y. Mio, N. Miyakawa, O. Miyamoto, A. Miyazaki, Y. Miyo, K. Miyoki, S. Mori, Y. Morisaki, S. Moriwaki, Y. Nagano, K. Nagano, S. Nakamura, K. Nakano, H. Nakano, M. Nakashima, R. Nakayama, Y. Narikawa, T. Naticchioni, L. Negishi, R. Quynh, L. Nguyen Ni, W-T Nishizawa, A. Nozaki, S. Obuchi, Y. Ogaki, W. Oh, J. J. Oh, S. H. Ohashi, M. Ohishi, N. Ohkawa, M. Ohta, H. Okutani, Y. Okutomi, K. Oohara, K. Ooi, C. Oshino, S. Otabe, S. Pan, K-C Pang, H. Parisi, A. Park, J. Arellano, F. E. Pena Pinto, I. Sago, N. Saito, S. Saito, Y. Sakai, K. Sakai, Y. Sakuno, Y. Sato, S. Sato, T. Sawada, T. Sekiguchi, T. Sekiguchi, Y. Shao, L. Shibagaki, S. Shimizu, R. Shimoda, T. Shimode, K. Shinkai, H. Shishido, T. Shoda, A. Somiya, K. Son, E. J. Sotani, H. Sugimoto, R. Suresh, J. Suzuki, T. Suzuki, T. Tagoshi, H. Takahashi, H Gravitational Wave Science Project National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka City Tokyo 181-8588 Japan Advanced Technology Center National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka City Tokyo 181-8588 Japan Department of Physics The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-0033 Japan Research Center for the Early Universe The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-0033 Japan Institute for Cosmic Ray Research KAGRA Observatory The University of Tokyo 5-1-5 Kashiwa-no-Ha Kashiwa City Chiba 277-8582 Japan Accelerator Laboratory High Energy Accelerator Research Organization (KEK) 1-1 Oho Tsukuba City Ibaraki 305-0801 Japan Earthquake Research Institute The University of Tokyo 1-1-1 Yayoi Bunkyo-ku Tokyo 113-0032 Japan Department of Mathematics and Physics Graduate School of Science and Technology Hirosaki University 3 Bunkyo-cho Hirosaki Aomori 036-8561 Japan Kamioka Branch National Astronomical Observatory of Japan 238 Higashi-Mozumi Kamioka-cho Hida City Gifu 506-1205 Japan The Graduate University for Advanced Studies (SOKENDAI) 2-21-1 Osawa Mitaka City Tokyo 181-8588 Japan Korea Institute of Science and Technology Information 245 Daehak-ro Yuseong-gu Daejeon 34141 Republic of Korea National Institute for Mathematical Sciences 70 Yuseong-daero 1689 Beon-gil Yuseong-gu Daejeon 34047 Republic of Korea International College Osaka University 1-1 Machikaneyama-cho Toyonaka City Osaka 560-0043 Japan School of High Energy Accelerator Science The Graduate University for Advanced Studies (SOKENDAI) 1-1 Oho Tsukuba City Ibaraki 305-0801 Japan Department of Astronomy Beijing Normal University Xinjiekouwai Street 19 Haidian District Beijing 100875 China Department of Applied Physics Fukuoka University 8-19-1 Nanakuma Jonan Fukuoka City Fukuoka 814-0180 Japan Department of Physics Tamkang University No. 151 Yingzhuan Road Danshui Dist. New Taipei City 25137 Taiwan Department of Physics

KAGRA, the underground and cryogenic gravitational-wave detector, was operated for its solo observation from February 25 to March 10, 2020, and its first joint observation with the GEO 600 detector from April 7 to April 21, 2020 (O3GK). This study presents an overview of the input optics systems of the KAGRA detector, which consist of various optical systems, such as a laser source, its intensity and frequency stabilization systems, modulators, a Faraday isolator, mode-matching telescopes, and a high-power beam dump. These optics were successfully delivered to the KAGRA interferometer and operated stably during the observations. The laser frequency noise was observed to limit the detector sensitivity above a few kilohertz, whereas the laser intensity did not significantly limit the detector sensitivity.

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First documented evidence of mesoplastic pollution in the Philippines: The case of the sandy beaches in Iligan City

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Regional Studies in Marine Science 2024年 75卷

作者： Bacosa, Hernando P. Perpetua, Zy D. Aron, Jemwel B. Bondaug, John Christian S. Cui, Vincent T. Imperial, John Earl Monera, Caryl Mae M. Villariaz, Jay-ar Gabriel, Aiza D. Mayol, Andres Philip Shiu, Ruei-Feng Environmental Science Graduate Program Department of Biological Sciences College of Science and Mathematics Mindanao State University-Iligan Institute of Technology Iligan 9200 Philippines Chemical Engineering Department University of San Agustin Iloilo 5000 Philippines Mindanao State University- Main Campus Sindangan Extension Zamboanga del Norte Sindangan 7100 Philippines Department of Chemical Engineering Mindanao State University-Main Campus Lanao del Sur Marawi 9700 Philippines Department of Mathematics and Natural Sciences College of Arts and Sciences North Eastern Mindanao State University-Tandag Campus Surigao del Sur Tandag 8300 Philippines Department of Manufacturing Engineering and Management Gokongwei College of Engineering De La Salle University Manila Taft Avenue 2401 Philippines Institute of Marine Environment and Ecology National Taiwan Ocean University Keelung 202301 Taiwan Center of Excellence for the Oceans National Taiwan Ocean University Keelung 202301 Taiwan

The problem of marine plastic pollution is multifaceted and a substantial threat to the environment and human well-being. Despite being a leading marine plastic contributor in the world, the prevalence of mesoplastics in the Philippines is yet to be ascertained. The study aimed to quantify and characterize the mesoplastics on the 10 sandy beaches (inside and outside the city center) of Iligan City, Philippines. Samples were extracted, quantified, and characterized based on their morphology and chemical composition. A total of 166 mesoplastics were collected from the ten sampling sites. Fragment mesoplastics accounted for 66.9 % of the plastic debris found across all sites, with sizes in the range of 21–25 mm (31.3 %), and white/transparent (31.1 %) being predominant. Attenuated total reflectance–Fourier transform infrared (ATR–FTIR) spectroscopy identified polyethylene, polyethylene terephthalate, and polypropylene as the dominant mesoplastic polymer. We also found that mesoplastics were significantly more abundant on beaches within the city center (39.67 ± 3.11 items/m²) than on beaches away from the city center (13.02 ± 1.80 items/m²). This study provides a useful baseline of information on mesoplastic distributions in densely populated urban areas. Our results suggest that there is a pressing need to strengthen existing policies on solid waste management and develop new strategies to mitigate plastic pollution. Addressing this issue is of utmost importance considering the potentially harmful effects of mesoplastics on marine organisms and ecosystems. To the best of our knowledge, this is the first report on mesoplastic pollution in the Philippines. © 2024 Elsevier B.V.

关键词： Beach litter City center Coastal barangay Marine plastic litter Plastic pollution

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Design of an ultrasensitive electrochemical sensor using a carbon black/zinc-organic framework nanocomposite for quantifying quercetin in fruits

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Food Chemistry 2025年 491卷

作者： Arunkumar Selvam Gopika Meenakumari Gopakumar Chih-Yu Kuo Kareem Yusuf Beena Saraswathyamma Mani Govindasamy Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei 10608 Taiwan International Graduate Program in Energy and Optoelectronic Materials (EOMP) National Taipei University of Technology Taipei 10608 Taiwan Department of Chemistry Amrita Vishwa Vidyapeetham Amritapuri Campus Clappana P O Kollam Kerala 690525 India High-Value Biomaterials Research and Commercialization Center National Taipei University of Technology Taipei 106 Taiwan Department of Chemistry College of Science King Saud University Riyadh 11451 Saudi Arabia International Ph.D. Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan Research Center for Intelligent Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan Department of Chemistry Korea University Seongbuk-gu Seoul Republic of Korea

Quercetin, a potent flavonoid recognized for its antioxidant and anti-inflammatory attributes, is abundantly found in fruits and vegetables, considerably enhancing their health benefits. Monitoring quercetin concentrations in food matrices is crucial for quality assurance, nutritional assessment, and substantiating health claims. We report a unique zinc-based metal–organic framework (Zn-MOF) incorporated with carbon black (CB) to create a highly sensitive electrochemical sensor specifically designed for quercetin detection. The distinctive porous architecture of the Zn-MOF, together with the superior conductivity of carbon black, have a synergistic effect that improves electron transfer. The sensor reports a wide linear range of 0.05–350.9 μM and a lowest detection limit of 3.7 nM. Furthermore, Zn-MOF@CB/GCE demonstrates excellent current retention (95.64 %) over a period of one month, together with commendable repeatability and reproducibility. The real-sample study of the proposed sensor demonstrates an effective recovery range for fruits: apple (95.0–99.0 %), grapes (96.0–98.0 %), and guava (97.0–101.0 %).

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Correction: Resistance QTLs controlling leaf and neck blast disease identified in a doubled haploid rice population

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Euphytica 2023年第7期219卷 1-1页

作者： Korinsak, Siripar Sriprakhon, Saengchai Sirithunya, Kanyanat Sriwongchai, Tanee Wongsaprom, Chanakarn Plabpla, Anucha Vanavichit, Apichart Toojinda, Theerayut National Center for Genetic Engineering and Biotechnology (BIOTEC) National Science and Technology Development Agency (NSTDA) Khlong Luang Thailand Faculty of Science and Agricultural Technology Rajamangala University of Technology Lanna Chiangmai Thailand Department of Agronomy Faculty of Agriculture Kasetsart University Bangkok Thailand Interdisciplinary Graduate Program in Genetic Engineering and Bioinformatics Kasetsart University Bangkok Thailand Department of Agronomy Faculty of Agriculture at Kamphaeng Saen Kasetsart University Nakhon Pathom Thailand Rice Science Center Kasetsart University Nakhon Pathom Thailand

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Gold Nanoparticle Decorated Bismuth Vanadate Casting on Screen-Printed Electrode for Chlortetracycline Detection in Tap Water

SSRN

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SSRN 2024年

作者： Ngo, Duy Ba Gopi, Praveen Kumar Rajkumar, Muniyandi Chen, Shen-Ming Rijiravannich, Patsamon Khownarumit, Porntip Somasundrum, Mithran Surareungchai, Werasak Bangkhuntien-chaitalay Rd. Bangkok10150 Thailand Analytical Sciences and National Doping Test Institute Mahidol University Rama VI Rd. Bangkok10400 Thailand Electroanalysis and Bioelectrochemistry Lab Department of Chemical Engineering and Biotechnology National Taipei University of Technology No.1 Section 3 Chung-Hsiao East Rd. Taipei106 Taiwan Bioscience and System Biology Research Team National Center for Genetic Engineering and Biotechnology National Sciences and Technology Development Agency at KMUTT Bangkhuntien-chaitalay Rd. Bangkok10150 Thailand Pilot Plant Development and Training Institute KMUTT Bangkhuntien-chaitalay Rd. Bangkok10150 Thailand Nanoscience and nanotechnology graduate program Faculty of Science KMUTT Pracha Uthit Rd. Bangkok10140 Thailand PSG College of Arts and Science Civil Aerodrome Post Tamil Nadu Coimbatore641014 India Quarter 6 Linh Trung Ward Thu Duc City Ho Chi Minh City720400 Viet Nam

Background Chlortetracycline (CTC) belongs to the class of tetracycline’s compounds, which is known for its antibacterial activity. CTC was largely consumed by farm animals than humans, which leads to the growth antibiotic – resistant bacteria and environmental contamination. So far no one reported the electrochemical detection and determination of CTC by using AuNPs@BiVO4 composite. Some reports have been reported using conventional chromatography which is most expensive, time-consuming and highly equipped method. Results Here, we report a simple method for preparing gold nanoparticle decorated bismuth vanadate (AuNPs@BiVO4), which was dropped cast on a screen-printed carbon electrode (SPCE). The AuNPs@BiVO4 and AuNPs@BiVO4/SPCE materials were characterized using TEM, SEM-EDX, XPS, DLS, ELS, EIS, and CV. The as-prepared AuNPs@BiVO4/SPCE was used to detect and determine chlortetracycline (CTC) by different pulse potentials in phosphate buffer pH 7.0. The electrode possessed a wide linear range of 0.99 – 19.06 µM, with obtained LOD = 0.15 µM, LOQ = 0.49 µM, and sensitivity = 0.059 μA μM-1 cm-2. It also exhibited good selectivity, stability, and repeatability, recovering 87.14% - 100% for detecting CTC in Mili Q and tap water. Significance Facile and rapid synthesis of AuNPs@BiVO4 nanocomposite film modified electrode at physiological pH conditions has been prepared and A highly electrochemical detection and determination of CTC using AuNPs@BiVO4 nanocomposite film has been developed for the first time. Thus, the proposed electrode could be applied for the detection and determination of CTC in water sources and has the potential to be used for real sample analysis. © 2024, The Authors. All rights reserved.

关键词： Nanocomposites

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