Article
Chemistry, Multidisciplinary
Hang Ren, Qianqian Zhang, Zhao Meng, Rui Ling, Weidong Qin, Zhenglong Wu
Summary: New colorimetric detection strategies based on a low-cost RGB colorimetry system equipped with an industrial-grade color sensor have been developed and applied successfully for Cd2+ and pH detection, providing reliable measurements.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2021)
Article
Chemistry, Analytical
Xiu Qin, Chunling Yuan, Guoxing Geng, Rui Shi, Shiqi Cheng, Yilin Wang
Summary: An enzyme-free colorimetric method for sensitive detection of uric acid was established by inhibiting the etching of gold nanorods. The method achieved detection through UV-vis absorption spectra and visual observation, with a detection limit of 0.76 μM in low concentration range. This method has been successfully applied for determining uric acid in clinical samples.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Shasha Liu, Xianfeng Wang, Chengyue Zou, Jun Zhou, Mei Yang, Suyi Zhang, Danqun Huo, Changjun Hou
Summary: A rapid and sensitive multicolor colormetric method for detecting hexavalent chromium ion in aqueous solution was established using gold nano-double cone@silver nanorods. The method showed high sensitivity and good linearity, with a detection limit of 1.69 μM. The color changes of the nanomaterial allowed for naked-eye detection of Cr6+ with significant accuracy.
ANALYTICA CHIMICA ACTA
(2021)
Article
Chemistry, Analytical
Bing Qiang Zou, Hong Zhi Zhang, Zhu Fu, Tianrong Zhan, Jian Wang
Summary: In this study, gold nanorods were used as an optical probe for the sensitive and colorimetric detection of thiourea. The presence of thiourea facilitated the binding of Au+ and thiourea to form a stable complex, leading to a change in the morphology of AuNRs and a blue shift. The colorimetric method showed excellent performance in terms of detection limit, selectivity, and application in fruit juice samples.
Article
Chemistry, Analytical
Jing Zhang, Rui Huang, Jiajin Zhang, Jun Zhou, Hui Qin, Ping Yang, Changjun Hou, Danqun Huo
Summary: This study constructed a novel acid- and sulfide-sensitive colorimetric sensor array based on gold triangular nanoplates, which can accurately identify different acids and sulfides. Through this method, quantitative analysis of glutathione was also successfully achieved. With advantages such as simplicity of operation, quick response, and superior performance, it shows potential application prospects in the real-time or on-site identification of traditional Chinese Baijiu.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Xia Xu, Xiaotian Wu, Shunqian Zhuang, Yucong Zhang, Yuting Ding, Xuxia Zhou
Summary: In this study, magnetic graphene oxide was used to immobilize diamine oxidase for the development of a colorimetric biosensor to detect histamine in fish. The biosensor showed a strong response to histamine and had negligible interference from other compounds. The etching induced multicolor change of the gold nanorods indicated the presence of varying levels of histamine in the fish, which was consistent with the overall change in the content of total volatile basic nitrogen. This colorimetric biosensor has great potential in evaluating the freshness of red-fleshed fish high in histamine.
Article
Food Science & Technology
Jiawei Li, Xiaofang Liu, Huibo Luo, Dong Zhao, Jing Zhang, Cailin Qiao, Yi Ma, Danqun Huo, Changjun Hou
Summary: This paper reports a colorimetric sensor array based on gold nanorods for the detection of reducing substances in Baijiu. The method relies on capturing the RGB values of the morphology changes of the nanorods for pattern recognition and fingerprint construction. This method has good qualitative and quantitative capabilities and can accurately discriminate different brands of Baijiu.
FOOD ANALYTICAL METHODS
(2022)
Article
Spectroscopy
Guo-Ying Chen, Chun-Yan Zhang, Shi-Jun Yin, Hang-Yu Zhou, Tao Tian, Li-Jing Peng, Hao Zhang, Hua Chen, Feng-Qing Yang
Summary: A highly sensitive visual colorimetric sensor was developed for the detection of trichlorfon using gold nanorods and ascorbate oxidase. The sensor showed a wide linear range and low detection limit, and exhibited good recovery in lake water samples.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Chemistry, Analytical
Xiao-Li Yin, Yun Qing Liu, Hui-Wen Gu, Qi Zhang, Zhao Wei Zhang, Hui Li, Pei-Wu Li, Yu Zhou
Summary: A multicolor enzyme-linked immunosorbent sensor was developed for accurate detection of organophosphates in complex food samples. The sensor displayed satisfactory linear ranges and low detection limits, making it an excellent tool for food sample analysis. This sensor is capable of providing accurate and reliable assay for organophosphates in complex food samples.
MICROCHEMICAL JOURNAL
(2021)
Article
Nanoscience & Nanotechnology
Rufen Wu, Kai Li, Chenyang Shen, Juan Huang, Zeyu Gao, Keru Tang, Yumin Leng, Zhengbo Chen
Summary: An efficient visual sensing strategy using gold nanomaterials and TMB2+ was developed to identify antioxidants, successfully discriminating and determining eight antioxidants with a low detection limit and excellent practical application capability, including in human serum samples.
ACS APPLIED NANO MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Yuxiang Xue, Xinyao Ma, Xue Feng, Sam Roberts, Guangyu Zhu, Yi Huang, Xianfeng Fan, Jun Fan, Xianfeng Chen
Summary: Gold nanostructures, especially gold nanobipyramids, have gained significant attention due to their unique physical and optical properties. However, synthesizing and purifying homogeneous gold nanobipyramids is a challenging task.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Analytical
Su-Jin Yoon, Yun-Sik Nam, Ji Young Lee, Jin Young Kim, Yeonhee Lee, Kang-Bong Lee
Summary: Concave gold nanocubes are used as optical nanoprobes for the determination of nitrite ions by measuring localized surface plasmon resonance absorption, where the blue-shifted color change after selective etching provides a rapid assessment of concentration. The method showed high selectivity and sensitivity in detecting nitrite ions under different conditions, and has been successfully applied to various water and food samples.
Article
Chemistry, Analytical
Suyan Wang, Xiaohui Huang, Qingxiao An, Rongju Zhou, Weizhen Xu, Dong Xu, Qinlu Lin, Xuan Cao
Summary: The study proposes a highly sensitive assay for Pb2+ using gold nanostars as probes under the catalytic activity of Pb on etching gold atoms. Through monitoring the color change and longitudinal localized surface plasmon of GNSs, Pb2+ can be detected at concentrations as low as 200 pM with a limit of detection of 1.5 pM.
ANALYTICA CHIMICA ACTA
(2021)
Article
Spectroscopy
Zahra Abolghasemi-Fakhri, Mohammad Amjadi
Summary: A facile method for preparing a gold nanostar-graphene quantum dot composite was reported, which resulted in highly active surfactant-free gold nanostars. The composite was used in a new sensing strategy for colorimetric detection of cysteine by studying its etching reaction with Na2SO3. Larger gold nanostars showed greater activity in the etching reaction, and pre-added cysteine protected the nanostars from etching, allowing for sensitive detection of cysteine with a detection limit of 0.35 nM.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Engineering, Environmental
Zhiwei Qiu, Wei Duan, Shoufu Cao, Teng Zeng, Tianyu Zhao, Jiankun Huang, Xiaoqing Lu, Jingbin Zeng
Summary: In this paper, a highly specific colorimetric method for fluoride (F-) using AgPt-Fe3O4 nanozyme was proposed. The method has 100% aqueous compatibility and a low detection limit. The color changes are induced by the oxidation of SiO2 shell, and the method shows high selectivity towards F- over other common anions, making it suitable for analyzing complex sewage samples.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
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)