Article
Chemistry, Analytical
Silvina Kergaravat, Natali Romero, Luciana Regaldo, Guillermo R. Castro, Silvia R. Hernandez, Ana Maria Gagneten
Summary: This research aimed to develop an electrochemical method for detecting CIP, AgNPs, and their mixtures and correlating them with ecotoxicological effects in aquatic organisms. The study found that AgNPs had the highest toxicity on C. dubia, followed by the CIP-AgNP mixture and then CIP alone. The stability of CIP and Ag(I) from AgNPs was evaluated, showing potential applications for environmental monitoring and highlighting the importance of electrochemical and ecotoxicology approaches in preserving environmental health.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Analytical
Yifei Zhang, Danlei Li, Richard G. Compton
Summary: We have developed a new and sensitive stripping voltammetric method for the detection of As(III) in aqueous solution using gold macroelectrode or gold nanoparticle-modified glassy carbon electrode (GCE). The method is based on underpotential deposition (UPD) of As ad-atoms and provides linear responses within the range of 0.01 μM to 0.1 μM or 0.005 μM to 0.1 μM for gold macroelectrodes and gold nanoparticle-modified electrodes, respectively. The method shows practical value with clear and discernable signals even at low concentrations of As(III), meeting the WHO limit for drinking water.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Shi-Hua Chen, Zong-Yin Song, Xiang-Yu Xiao, Hong-Qi Huang, Yuan-Fan Yang, Pei-Hua Li, Meng Yang, Xing-Jiu Huang
Summary: Vacancy and doping engineering were used to improve the electrocatalytic ability of nanomaterials for detecting heavy metal ions. The P-doped material showed enhanced sensitivity and selectivity towards As(III), and the vacancies provided abundant electrons to form active centers.
ANALYTICAL CHEMISTRY
(2022)
Article
Electrochemistry
Kequan Xu, Clara Perez-Rafols, Maria Cuartero, Gaston A. Crespo
Summary: The increasing usage of silver and silver nanoparticles has driven scientific interest in methods for monitoring silver, particularly in the context of environmental impact. Electrochemical sensors, with their advantageous properties of low cost, fast measurements, and adaptability to portable instrumentation, are well-suited for silver monitoring. Significant improvements in analytical performance have been achieved in the last decade, with a focus on new protocols, selective receptors, and electrode materials.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Multidisciplinary
Nicole E. Pollok, Yi Peng, Charlie Rabin, Ian Richards, Richard M. Crooks
Summary: This study investigates the impact of serum on the electrochemical detection of bioassays using silver nanoparticles (AgNP) as labels. The results show that both model and antigen-specific bioassays can be performed in undiluted serum without interference from serum components. The study also indicates that the maximum percentage of serum that can remain in the assay buffer during electrochemical detection without affecting accuracy is 0.25%, with inaccurate results observed when 0.50% or more serum is present. The inhibiting factors for galvanic exchange in serum are likely related to biomolecule adsorption on AgNP labels, chelation of Au3+ by serum components, or both.
Article
Chemistry, Analytical
Elena Dorozhko, Anna S. Gashevskay, Elena Korotkova, Jiri Barek, Vlastimil Vyskocil, Sergei A. Eremin, Evgeny Galunin, Muhammad Saqib
Summary: This study synthesized a hapten-protein conjugate with copper nanoparticles (Hap-Car-BSA@CuNPs) for the determination of carbaryl, and successfully developed a novel method for monitoring carbaryl residues in flour samples using an electrochemical immunosensor. The detection range was 0.8-32.3 μg/kg with a limit of detection of 0.08 μg/kg.
Article
Chemistry, Analytical
Ali Nourbakhsh, Mostafa Rahimnejad, Maryam Asghary, Habibollah Younesi
Summary: This study developed a sensitive platform based on silver nanoparticles/graphene nanoplates modified graphite electrode for the simultaneous and selective determination of heavy metal ions in tap water. The experimental results showed that the electrochemical sensor exhibited high practical applicability, reproducibility, and stability in detecting heavy metal ions.
MICROCHEMICAL JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Thi Thu Hien Nguyen, Thi Hai Yen Pham, Tien Dat Doan, Nhung Hac Thi, Ho Thi Oanh, Thi Thao Nguyen, Vu Thi Thu Ha, Tuyen Van Nguyen, Min Ju Cho, Dong Hoon Choi, Mai Ha Hoang
Summary: A new method for fabricating high-performance electrochemical sensors for lead ion detection using square-wave anodic stripping voltammetry was developed. The electrode exhibited good conductivity and high stability, suitable for detecting Pb(II).
Article
Chemistry, Physical
Seongeun Jeong, Sungwook Yang, Yi Jae Lee, Soo Hyun Lee
Summary: This paper describes the fabrication of silver nanoparticle/laser-induced graphene (AgNP/LIG) electrodes for the multi-detection of cadmium (Cd), lead (Pb), and copper (Cu) ions using a square wave anodic stripping voltammetry (SWASV) technique. A fast and simple method was used to fabricate LIG on a polyimide film by exposure to an infrared CO2 laser, compared to conventional methods. Incorporating AgNPs with LIG significantly improved the performance of the sensor for heavy metal ion detection.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Analytical
Ji-Hoon Han, Jinkyeong Kim, Joon-Hyung Jin, Joon Hyub Kim
Summary: This paper presents the development of a heavy metal sensor based on a paper channel for point-of-care detection. The sensor uses a three-electrode system fabricated on PET by screen printing. The sensor showed high sensitivity and a wide cadmium detection range, making it suitable for various heavy metal detection applications.
MICROCHEMICAL JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Nurul Hidayah Ramli, Noorhashimah Mohamad Nor, Nor Dyana Zakaria, Khairunisak Abdul Razak
Summary: In this work, a platinum nanodendrites (PtNDs)-modified indium-tin-oxide (ITO) electrode (PtNDs/ITO) is developed for detecting Pb(II) ions. The PtNDs are drop-cast on the ITO electrode with varying concentrations for optimizing the electrochemical surface area. A Nafion thin layer is coated on top of the PtNDs/ITO-modified electrode to improve stability. The optimized PtNDs concentration of 120 mg/L shows excellent electrochemical performance with high specificity, reproducibility, and repeatability for detecting Pb(II) ions.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Environmental
Ruihua Huang, Jiapei Lv, Jianbing Chen, Yeling Zhu, Jian Zhu, Thomas Wagberg, Guangzhi Hu
Summary: This study proposes a boron and nitrogen co-doped carbon material derived from a metal-organic framework material for the detection of heavy metal ions in food. The sensor shows good sensitivity and selectivity for Cd(II) and Pb(II), and has potential applications in complex samples.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Tayyaba Kokab, Aalia Manzoor, Saima Aftab, Faiza Aslam, Faiza Jan Iftikhar, Humaira Masood Siddiqi, Afzal Shah
Summary: In this study, a sensitive and selective sensor based on BOC6-modified GCE was developed for the detection of Pb(II) ions. The electrochemical platform showed improved sensing performance compared to bare GCE. Under optimized conditions, the sensor exhibited a linear concentration range and a low detection limit for lead ions. It demonstrated qualities of sensitivity, selectivity, stability, reproducibility, and practical applicability.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Fernand Chassagneux, Nelly Couzon, Christophe Place, Mathieu Maillard, Arnaud Brioude, Laurence Bois
Summary: The electrochemical behavior of silver nanoparticles in mesoporous oxide electrodes was investigated. The results showed the importance of Ag+ ion retention by TiO2 films. Two anodic peaks in the voltammetric curves were observed, which could be explained by the presence of two distinct populations of silver nanoparticles with different size distributions in the film.
Article
Electrochemistry
Daniel E. Molina, Nathalie Wall, Haluk Beyenal, Cornelius F. Ivory
Summary: The developed FI-EQCM-ICP-OES technique allowed for studying the electrochemical recovery of silver with mass detection and elemental analysis. The results showed the composition of the stripped metal layer varied between pure silver and silver-copper alloy depending on the redox replacement time.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Zhibin Liu, Hatem M. A. Amin, Yuman Peng, Manuel Corva, Rossitza Pentcheva, Kristina Tschulik
Summary: This study investigates the influence of nanocatalyst morphology on their catalytic activity in the oxygen evolution reaction (OER). The results show that nanocubes with predominant (001) facets exhibit higher activity compared to multi-faceted spheroids. Density functional theory calculations confirm the higher activity of (001) surfaces, attributed to a change in active sites and potential-determining steps.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Anna Rabe, Maximilian Jaugstetter, Felix Hiege, Nicolas Cosanne, Klaus Friedel Ortega, Julia Linnemann, Kristina Tschulik, Malte Behrens
Summary: A computer-controlled microemulsion-assisted co-precipitation method is established to control the pore size of catalysts for the electrochemical oxygen evolution reaction. It is found that when the pore size reaches a certain threshold, the overpotential increases significantly and the oxygen release mechanism changes. These findings are of great importance for the development of better catalysts.
Article
Chemistry, Physical
Steffen Murke, Kevin Wonner, Serena R. Alfarano, Christian Rurainsky, Paolo Cignoni, Kristina Tschulik, Martina Havenith
Summary: Due to their unique surface properties, gold-enriched porous nanoparticles fabricated by electrochemical dealloying show enhanced catalytic performance for the electrochemical oxygen evolution reaction (OER) compared to monometallic gold nanoparticles or bare electrodes. Surface-enhanced Raman spectroscopy (SERS) combined with electrochemistry confirmed the formation of Au-O-O-H species, a known intermediate of OER, at a specific potential. These results highlight the potential application of dealloying-derived nanoparticles as promising catalyst materials.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Review
Chemistry, Physical
Christopher Batchelor-McAuley
Summary: The onset potential is widely used to measure the electrocatalytic activity but lacks a single and agreed definition or a standard measurement procedure. This review discusses the different definitions used in the literature. However, regardless of how it is measured, the onset potential is sensitive to catalyst loading and specific surface area, making the mass-activity or specific-activity a better method for measuring the activity of an electrocatalyst.
CURRENT OPINION IN ELECTROCHEMISTRY
(2023)
Article
Chemistry, Physical
Paolo Cignoni, Niclas Blanc, Kristina Tschulik
Summary: The advancement of electrocatalysis from fundamental research to application requires seamless collaboration between researchers from different fields. This mini review highlights the common problems faced when evaluating the performance of complex electrode assemblies made of nanostructured materials. Applying classical kinetic descriptors to these assemblies often makes it challenging to distinguish and attribute material properties to electrode performance. Recent advancements in discerning and analyzing electrocatalysis on composite or nanostructured electrodes are discussed, with emphasis on detecting and addressing inhomogeneities in the electrocatalytic activity of three-dimensional electrodes.
CURRENT OPINION IN ELECTROCHEMISTRY
(2023)
Review
Chemistry, Physical
Mahnaz Azimzadeh Sani, Kristina Tschulik
Summary: In this article, we discuss the capabilities of nanoimpact electrochemistry for studying properties of colloidal nanoparticles, electrocatalytic activity, and particle reactivity at a single entity level. These capabilities provide a better understanding of the role of solid/liquid interfaces in various chemical and biological systems. The article reviews the effects of particle properties and particle-electrode interactions on electrochemical signals and resulting scientific insights.
CURRENT OPINION IN ELECTROCHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Jiahao Yu, Minjun Yang, Christopher Batchelor-McAuley, Samuel Barton, Rosalind E. M. Rickaby, Heather A. Bouman, Richard G. Compton
Summary: A fluorescence-electrochemical method is used to study the response of phytoplankton to electro-generated oxidants, allowing for high-throughput species analysis.
CELL REPORTS PHYSICAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Chenglong Luan, Johanna Angona, Arjun Bala Krishnan, Manuel Corva, Pouya Hosseini, Markus Heidelmann, Ulrich Hagemann, Emmanuel Batsa Tetteh, Wolfgang Schuhmann, Kristina Tschulik, Tong Li
Summary: We investigated the relationship between crystallographic orientations of beta-CoOOH and catalytic activity for the oxygen evolution reaction (OER). We found that beta-CoOOH(01 1? ${\bar{1}}$ 0) grown on [ 1?21? ${\bar{1}2\bar{1}}$ 0]-oriented Co exhibited higher OER activity compared to beta-CoOOH(10 1? ${\bar{1}}$ 3) grown on [02 2?1] ${\bar{2}1]}$ -oriented Co or beta-CoOOH(0006) grown on [0001]-oriented Co. This is due to the presence of higher amounts of hydroxyl ions and more easily reducible Co-III-O sites in beta-CoOOH(01 1? ${\bar{1}}$ 0). Our findings offer opportunities for designing pre-catalysts with preferred defects to promote the formation of the most active OER species.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Physical
K. Koeble, M. Jaugstetter, M. Schilling, M. Braig, T. Diemant, K. Tschulik, R. Zeis
Summary: Thermal activation at different temperatures was investigated for its impact on the structure, surface composition, wettability, and electrochemical activity of rayon-based carbon felt electrodes for VRFBs. Novel techniques including AFM, DVS, EIS, and DRT analysis were used to study these properties. The results showed that higher activation temperatures improved the wettability and reduced process impedances, but also caused severe carbon decomposition. The optimum electrochemical performance was observed at an activation temperature of 400 degrees C.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Analytical
Christoph J. Bondue, Marc T. M. Koper, Kristina Tschulik
Summary: Online techniques for quantitative analysis of reaction products have limitations in coupling with electrochemistry due to the low product formation rates. However, differential electrochemical mass spectrometry (DEMS), combined with a dual thin-layer cell, provides high time resolution and addresses some challenges arising from the vacuum-electrolyte interface. To accurately translate signals observed in the mass spectrometer into electrochemical product formation rates, a calibration constant considering both DEMS sensitivity and dual thin-layer cell transfer efficiency is required. We propose a two-point calibration method based on the dependence of transfer efficiency on analyte diffusion coefficient, which offers a versatile and easy approach for a wide range of electrode-electrolyte combinations.
ACS MEASUREMENT SCIENCE AU
(2023)
Article
Chemistry, Multidisciplinary
Chen Ma, C. Alexander Schrage, Juliana Gretz, Anas Akhtar, Linda Sistemich, Lena Schnitzler, Han Li, Kristina Tschulik, Benjamin S. Flavel, Sebastian Kruss
Summary: Small perturbations in material structures can significantly affect their properties. By modifying single wall carbon nanotubes (SWCNTs) with quantum defects using diazonium salts, the photophysics of the nanotubes can be determined. The presence of multiple chiralities in SWCNT samples complicates the identification of defect-related emission features. This study shows that quantum defects do not affect aqueous two-phase extraction of different SWCNT chiralities, indicating a low number of defects. The results demonstrate the importance of stochasticity in the optical properties of SWCNTs and highlight the discrepancy between ensemble and single particle experiments/properties of nanomaterials.
Article
Chemistry, Multidisciplinary
Christoph J. J. Bondue, Marius Spallek, Lennart Sobota, Kristina Tschulik
Summary: To date, the electroactive species for selective aldehyde oxidation to carboxylates at gold electrodes is usually assumed to be the diolate, which is formed in high concentration only in very alkaline electrolytes. However, OH--induced aldehyde decomposition in these electrolytes hinders its industrial application for biomass upgrading. In this study, we demonstrate the successful oxidation of aliphatic aldehydes at a rotating gold electrode at pH 12, where only 1% of the aldehyde exists as the diolate species. This insight allows developing strategies for selective aldehyde oxidation without aldehyde decomposition, making its future industrial application viable.
Article
Electrochemistry
Paolo Cignoni, Pouya Hosseini, Christoph Kaiser, Oliver Trost, Dean-Robin Nettler, Lisa Trzebiatowski, Kristina Tschulik
Summary: Accurate normalization of electrochemical active surface area (ECSA) is crucial for determining and comparing catalyst activity. In this study, we propose a versatile approach to validate different ECSA determination techniques for nanoparticle-modified or nanostructured electrodes, using AuxPdy nanoparticles as an example. By combining surface oxide reduction and volume determination, we can estimate the nanoparticle diameter and assess the accuracy of the obtained ECSA values. Experimental conditions for determining AuxPdy nanoparticle ECSA using surface oxide reduction are provided and compared to those for macroelectrodes. This approach can be applied to different alloy systems, offering a widely applicable method for determining electrochemical surface areas and validating the transferability of existing macroelectrode characterization techniques to nanostructured or nanoparticle-modified electrodes.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Physics, Applied
Steffen Schuettler, Ludwig Jolmes, Emanuel Jess, Kristina Tschulik, Judith Golda
Summary: A humid atmospheric pressure plasma jet was used to treat an aqueous liquid, and the transport of hydrogen peroxide and hydroxyl from the plasma to the liquid was analyzed. Two in situ liquid diagnostics for each species were compared and validated. The results showed good agreement between the different methods used for detection.
PLASMA PROCESSES AND POLYMERS
(2023)
Article
Chemistry, Physical
Stefan M. Piontek, Dennis Naujoks, Tadneem Tabassum, Mark J. DelloStritto, Maximilian Jaugstetter, Pouya Hosseini, Manuel Corva, Alfred Ludwig, Kristina Tschulik, Michael L. Klein, Poul B. Petersen
Summary: Water is essential in electrochemistry and plays a crucial role in the electric double layer and interfacial electric fields. Investigating the molecular-level structure of interfacial water near working electrode surfaces has been challenging. However, using sum-frequency-generation (SFG) spectroscopy, it is now possible to probe the structure of water at buried electrode-electrolyte interfaces. Thin gold layers were found to effectively remove the limitation of obscuring the SFG spectra. This newfound ability to probe interfacial solvent structure may contribute to more efficient electrolyte composition and electrode design.
ACS PHYSICAL CHEMISTRY AU
(2023)
Article
Chemistry, Analytical
Mengmeng Guo, Na Luo, Yueling Bai, Zhenggang Xue, Qingmin Hu, Jiaqiang Xu
Summary: A porous heterostructure WO3-C/In2O3 was designed and prepared for a miniature H2 sensor, which showed higher response value, lower operating temperature, fast response-recovery speed, and low limit of detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Feng Hu, Hui Hu, Yuting Li, Xiaohui Wang, Xiaowen Shi
Summary: Arsenic contamination in water bodies is a significant health risk. This study developed a chitosan-catechol modified electrode for rapid and accurate detection of trace amounts of arsenic. The modified electrode demonstrated good detection capability and resistance to ionic interference, making it suitable for in situ detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Yantao Zhang, Qian Liu, Tao Tian, Chunhua Xu, Pengli Yang, Lianju Ma, Yi Hou, Hui Zhou, Yongjun Gan
Summary: In this study, a lysosome-targeting buffering fluorogenic probe (Lyso-BFP) was designed and synthesized, demonstrating excellent photostability, pH specificity, and responsiveness to lysosomal acidification in living cells. The performance of Lyso-BFP in pH sensing was attributed to the inhibition of the photo-induced electron transfer process. Lyso-BFP allowed for wash-free imaging and long-term real-time monitoring of lysosome pH changes based on its off-on fluorescence behavior and buffer strategy.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Wei Cai, Wenbo Sun, Jiayue Wang, Xiaokui Huo, Xudong Cao, Xiangge Tian, Xiaochi Ma, Lei Feng
Summary: In this study, a near-infrared fluorescent probe HCBG was developed for imaging of alpha-GLC. HCBG exhibited excellent selectivity and sensitivity towards alpha-GLC in complex bio-samples, and showed good cell permeability for in situ real-time imaging. Through the high-throughput screening system established by HCBG, a natural alpha-GLC inhibitor was successfully isolated and identified. This study provides a novel fluorescence visualization tool for discovering and exploring the biological functions of diabetes-related gut microbiota, and a high-throughput screening approach for alpha-GLC inhibitor.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Trey W. Pittman, Xi Zhang, Chamindie Punyadeera, Charles S. Henry
Summary: Heart failure is a growing epidemic and a significant clinical and public health problem. Researchers have developed a portable and affordable diagnostic device for heart failure that can be used at the point-of-care, providing a valid alternative to current diagnostics approaches.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Anders O. Tjell, Barbara Jud, Roland Schaller-Ammann, Torsten Mayr
Summary: An optical hydrogen peroxide sensor based on catalytic degradation and the detection of produced oxygen is presented. The sensor offers higher resolution and better sensitivity at lower H2O2 concentrations. By removing O2 from the sample solution, a more sensitive O2 sensor can be used for measurement. The sensor has been successfully applied in a flow-through cell to measure H2O2 concentration in different flow rates.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Seong Jae Kim, Ji-hun Jeong, Gaabhin Ryu, Yoon Sick Eom, Sanha Kim
Summary: Surface-enhanced Raman spectroscopy (SERS) is a high-sensitivity, label-free detection method with various analytical applications. Researchers have developed a hydrophobic SERS substrate based on engineered carbon nanotube arrays (CNT-SERS) and studied the role of structural design at both micro and nanoscales. The substrate demonstrated controlled self-enrichment capability and enhanced sensitivity, with a significant increase in the SERS signal. The study also proposed a theoretical model and a concentration strategy inspired by plants for analyte deposition on microarrays.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Dan Zhao, Renjun Jiang, Xiaoqiang Liu, Subbiah Alwarappan
Summary: In this study, a novel ternary composite material was constructed by assembling cerium vanadate nanorods on reduced graphene oxide-microcrystalline cellulose nanosheets, and it was used for real-time monitoring of the concentration of superoxide anions in vivo. The ternary composite showed excellent conductivity, large surface area, and abundant active sites, leading to a wider linear range, high sensitivity, low detection limit, and fast response time for superoxide anion detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Tengfei Wang, Liwen Wang, Guang Wu, Dating Tian
Summary: In this study, a covalent organic framework material TaTp-COF with porous and uniform spheres was successfully prepared via hydrothermal reaction, and it was found to significantly enhance the aggregation-induced emission (AIE) of berberine. The unique emission properties of berberine on TaTp-COF were studied and utilized for the sensitive detection of berberine.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Lin Li, Yilei Ding, Lei Xu, Shuoran Chen, Guoliang Dai, Pengju Han, Lixin Lu, Changqing Ye, Yanlin Song
Summary: In this study, a novel TTI based on a ratiometric fluorescent nanosensor is designed, which has the advantages of high accuracy and low cost. Experimental and theoretical investigations confirm its pH responsiveness and demonstrate its good sensitivity and reliability. By monitoring the total volatile basic nitrogen, this TTI can accurately predict food spoilage and can be adaptively modified for different types of food. The TTI based on this nanosensor enables visual monitoring of food quality.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Fangju Chen, Xueting Wang, Wei Chen, Chenwen Shao, Yong Qian
Summary: Lung cancer is the second most common malignant tumor worldwide. Drug resistance in lung cancer leads to treatment failure and recurrence in majority of patients. This study developed a fluorescent prodrug that can be activated in cancer cells to release drugs, and its signal can be tracked by imaging. It shows a unique autophagy-driven ferroptosis effect, indicating its potential for targeting drug-resistant cancer cells.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Weichao Li, Qiming Yuan, Zhangcheng Xia, Xiaoxue Ma, Lifang He, Ling Jin, Xiangfeng Chu, Kui Zhang
Summary: This study developed a high-performance gas sensor for formaldehyde detection by modifying ZnSnO3 with ZnO QDs and SnO2 QDs. The modified sensor showed improved sensing response and lower working temperature. The presence of ZnO QDs formed rich heterojunctions, increased surface area, and provided oxygen deficiency for formaldehyde sensing reaction, thus enhancing the sensor performance. This research provides an alternative method to enhance the sensing properties of MOS by QDs modification.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Joung-Il Moon, Eun Jung Choi, Younju Joung, Jin-Woo Oh, Sang-Woo Joo, Jaebum Choo
Summary: A novel nanoplasmonic substrate was developed for biomedical applications, which showed strong hot spots for detecting biomarkers at low concentrations. The substrate, called AuNPs@M13, was made by immobilizing 60 nm gold nanoparticles onto the surface of an M13 bacteriophage scaffold. It demonstrated higher sensitivity and lower limit of detection compared to commercially available assays.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Ning Li, Ya Zhang, Ying Xu, Xiaofang Liu, Jian Chen, Mei Yang, Changjun Hou, Danqun Huo
Summary: The molecular subtype of breast cancer guides treatment and drug selection. Invasive tests can promote cancer cell metastasis, so the development of high-performance, low-cost diagnostic tools for cancer prognosis is crucial. Liquid biopsy techniques enable noninvasive, real-time, dynamic, multicomponent, quantitative, and long-term observations at the cellular, genetic, and molecular levels. A Cu-Zr metal-organic framework (MOF) nanoenzyme with monatomic Cu attachment has been synthesized and proven to have high catalytic performance. The sensor constructed using this nanoenzyme shows potential for accurate classification of breast cancer serum samples.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Jeongmin Kim, Hyemin Kim, Seunghyun Park, Hyeonaug Hong, Yong Jae Kim, Jiyong Lee, Jaeho Kim, Seung-Woo Cho, Wonhyoung Ryu
Summary: This study presents a method to fabricate independently functioning microneedle (MN) electrodes with narrow intervals for high precision electrochemical sensing. The optimized mixture of photocurable polymer and single-wall carbon nanotubes was used to mold single composite MNs, which were then attached to pre-patterned electrodes. Plasma etching and electropolymerization were performed to enhance the electrochemical activity, and Prussian blue and glucose oxidase were electrodeposited on the MNs for glucose detection. The MN electrodes showed good sensitivity and linearity, and the feasibility of glucose detection was demonstrated in an in vivo mouse study.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)