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
Chemistry, Analytical
Alexandra Karapa, Christos Kokkinos, Peter R. Fielden, Sara J. Baldock, Nickolas J. Goddard, Anastasios Economou
Summary: This work presents a novel three-electrode plastic sensor chip for the detection of trace Hg(II) using anodic stripping voltammetry. The chip is manufactured by injection moulding, which is an eco-friendly and sustainable method. It consists of three carbon-based electrodes embedded in a plastic holder, and the reference electrode is coated with Ag using e-beam evaporation. By analyzing the sample spiked with Au(III), gold nanoparticles are formed on the working electrode, and Hg(II) co-deposits with the gold nanoparticles to form an Au(Hg) amalgam. The accumulated Hg(II) is then stripped off the electrode and measured using an anodic square wave potential scan. The sensor shows a limit of detection of 0.4 μg/L for Hg(II) and a repeatability of 5.3% at the 20 μg/L level of Hg(III) (n = 10). It is successfully applied to various samples with recoveries ranging from 98% to 107%.
Article
Chemistry, Multidisciplinary
Yun Du, Chenglong Sun, Yuru Shen, Luyao Liu, Mingjian Chen, Qingji Xie, Hongbo Xiao
Summary: A novel electrode for sensitive analysis of As(III) was prepared, by cast-coating multiwalled carbon nanotubes on a glassy carbon electrode, enabling stable loading of gold nanoparticles and gold staining for efficient detection of As(III) through linear sweep anodic stripping voltammetry.
Article
Electrochemistry
Meng-Hua Ye, Jun-Rong Chen, Han-Zhou Sun, Hong -Bo Xiao, Ting Yang, Wen-Lei Wang, Qing-Ji Xie
Summary: This study reports the fabrication of a novel electrode for the efficient determination of As(III) in solution and achieves satisfactory results in river water samples.
ELECTROCHIMICA ACTA
(2022)
Article
Biochemistry & Molecular Biology
Jin Zou, Jiawei Liu, Guanwei Peng, Haiyan Huang, Linyu Wang, Limin Lu, Yansha Gao, Dongnan Hu, Shangxing Chen
Summary: In this work, a new electrochemical Hg2+ sensing platform based on porous activated carbon (BC/Cu2O) modified with cuprous oxide was developed. Differential pulse anodic stripping voltammetry (DPASV) was used to investigate the sensing capability of the BC/Cu2O electrode towards Hg2+. The BC/Cu2O electrode exhibited excellent electrochemical activity due to the excellent conductivity and large specific surface area of BC, and the excellent catalytic activity of Cu2O nanoparticles. The sensor showed high sensitivity with a low detection limit of 0.3 ng/L and a wide linear response range from 1.0 ng/L to 1.0 mg/L, as well as good accuracy, acceptable precision, and reproducibility.
Article
Chemistry, Analytical
Emilia Konowal, Anna Modrzejewska-Sikorska, Anna Maria Kopaczewska, Bozena Karbowska
Summary: A new method for producing nanosilver using lignosulfonic acid derivative and developing a chemically modified GCE/AgNPs-LS/Hg electrode material is presented in this research. The modified electrode shows enhanced performance in detecting Tl+ ions compared to unmodified electrode. The novel AgNPs-LS/Hg2+ complex is assumed to be suitable for preparing functionalized nanostructured material and can serve as an electrochemical sensing platform for heavy metals.
Article
Chemistry, Analytical
Aymara da Silva Santos, Carolina Zeni Pires Mecca, Tiago Luiz Ferreira, Fabio Ruiz Simoes, Lucia Codognoto, Eliana Maira Agostini Valle
Summary: The interaction between the pesticide carbendazim and the metal ion Pb2+ was studied using electrochemical techniques. The presence of Pb2+ affected the electrochemical signal of carbendazim, indicating complex formation. The electroanalytical method was found to be feasible for the analysis of carbendazim in the presence of Pb2+.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Xiangjin Huang, Jianwen Li, Chunsheng Xie, Huasheng Zhang, Shoulian Wei, Wenfeng Lai, Shaoling Xian, Sicong Huang
Summary: The PVP-Co(OH)2 nanocomposite synthesized in this study showed superior sensing performance for Cu(II) ions compared to other modified electrodes. The electrode exhibited a wide linear response range, low detection limit, and good selectivity, stability, and reproducibility.
Article
Chemistry, Analytical
Artur Huseinov, Abdul Hoque, Kyle A. Ruble, Brandon J. Dee, Noe T. Alvarez
Summary: This study presents a reagentless sample preparation method for the detection of particulate Pb contaminants in tap water using membrane electrolysis. The membrane electrolysis allows for the in-situ generation of nitric acid, which, when combined with anodic stripping voltammetry, provides a powerful and reagent-free detection of Pb2+. The setup configuration enables semi-autonomous operation and requires minimal attention, making it more suitable for continuous measurements of particulate contaminants in tap water.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Jongte Lalmalsawmi, Zirlianngura, Diwakar Tiwari, Seung-Mok Lee, Dong-Jin Kim
Summary: A low-cost, eco-friendly, and efficient nanocomposite material was successfully synthesized and used for the detection of Pb2+ in aqueous media, showing good detection performance.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Randeep Kaur, Shweta Rana, Ranjeet Kaur, Navneet Kaur, Bhupender Singh
Summary: A novel PEDOT-AA-BTZ-Au-based Hg2+ selective hybrid electrochemical sensor has been designed for the detection of mercury ions. The sensor offers high sensitivity, selectivity, and low interference in real samples such as lake water and cosmetic products.
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, Analytical
Nandita Jaiswal, Ida Tiwari
Summary: The study utilized nS@GO for the detection of norepinephrine under various conditions. Through physical characterization and electrochemical techniques, the formation of nanocomposite material was confirmed, allowing for accurate quantification of norepinephrine and determination of detection limits.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Azar Yousefi, Hossein Aghaie, Masoud Giahi, Laleh Maleknia
Summary: This paper investigates the electrochemical behavior of Cd2+ and Pb2+ sensing using polyindole (PIN)/Mn2O3 nanocomposite and PIN/Mn2O3/polyaniline (PANI) nanofibers modified on a glassy carbon electrode. The study varied the amount of (PIN)/Mn2O3 nanocomposite to find the best performance. The results show that the PIN/Mn2O3/PANI nanofibers modified electrode exhibits good linear relationships for Cd2+ and Pb2+ in the concentration range of 0.05-450 mu g L-1, with detection limits of 0.05 and 0.02 mu g L-1, respectively.
Article
Multidisciplinary Sciences
Danny Valera, Lenys Fernandez, Gema Gonzalez, Hugo Romero, Omar Martinez, Patricio J. Espinoza-Montero
Summary: The study demonstrated that Ag-Hg and Ag-Bi Nys deposits were dispersed and embedded inside the booths of the Nf net, with detection limit slightly higher for the AgBiNysNf-GC electrode compared to the AgHgNysNf-GC modified electrode. Accuracy of measurements was verified through comparison with ICP-OES results, showing very low standard deviation and coefficients of variation.
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)