Article
Polymer Science
Jiunn-Jer Hwang, Aamna Bibi, Yu-Ci Chen, Kun-Hao Luo, Hsiang-Yuan Huang, Jui-Ming Yeh
Summary: In this study, electroactive poly (amic acid) (EPAA) and corresponding polyimide (EPI) with different redox capabilities and selectivity were synthesized and applied in electrochemical sensing of ascorbic acid (AA). Among them, the sensor constructed from S-EPAA-modified carbon paste electrode (CPE) showed the highest electro-catalytic activity and selectivity.
Article
Polymer Science
Aamna Bibi, Sheng-Chieh Hsu, Wei-Fu Ji, Yi-Chi Cho, Karen S. Santiago, Jui-Ming Yeh
Summary: In this study, an electrochemical sensor for uric acid detection was developed using a carbon paste electrode modified with electroactive polyimide synthesized from aniline tetramer and decorated with reduced nanoparticles of Au, Pt, and Ag. The sensor with Au nanoparticles exhibited the best performance with high sensitivity, low detection limit, and a linear detection range. Additionally, the sensor doped with Ag nanoparticles showed the best selectivity for a tertiary mixture of uric acid, dopamine, and ascorbic acid compared to the sensors with Pt and Au nanoparticles.
Article
Chemistry, Multidisciplinary
Pholoso Calvin Motsaathebe, Omolola Ester Fayemi
Summary: This study presents an electrochemical method for detecting ascorbic acid in oranges using a nanocomposite-modified electrode. The results show that the nanocomposite-modified electrode exhibits improved electron transfer and electrocatalytic reaction towards ascorbic acid, leading to higher sensitivity and detection limit compared to other sensors.
Article
Chemistry, Multidisciplinary
Lin Qi, Yan-jiang Jia, Yuan-cheng An, Xin-xin Zhi, Yan Zhang, Jin-gang Liu, Jia-shen Li
Summary: This work describes the fabrication of polyimide ultrafine fibrous membranes with aligned structures via high-speed electrospinning, utilizing organo-soluble photosensitive PI as the fiber-forming agent. The aligned UFMs exhibit hydrophobicity, favorable optical properties, and enhanced deformation durability, with significantly increased extension strength at higher rotating speeds. Furthermore, the UFMs demonstrate lithography capability due to the photo-cross-link nature of the PI resin, showing promise in manufacturing fiber-based photolithographic hierarchical structures on flexible substrates.
Article
Chemistry, Analytical
Dan Cheng, Xiang Liu, Peipei Li, Youyu Zhang, Meiling Liu, Shouzhuo Yao
Summary: In this study, a novel ratiometric electrochemical sensor for uric acid (UA) was developed using Cu2O nanocubes and boron carbide (B4C) as the sensing materials. The sensor detected UA concentration by measuring the ratio between the oxidation peak of UA and the reference peak of Cu2O.
Article
Engineering, Electrical & Electronic
Bavatharani Chokkiah, Muthusankar Eswaran, Saikh Mohammad Wabaidur, Zeid Abdullah Alothman, Soo Chool Lee, Ragupathy Dhanusuraman
Summary: A novel method for selective and sensitive detection of chloride ion using electrospun PVA-PANi-g-C3N4 nanofibers as modified electrode has been proposed. The modified electrode showed significant electrochemical sensitivity and selectivity for chloride ion, achieving a low limit of detection and high sensitivity.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Biomaterials
Ye Yuan, Changyong Gao, Zhexu Wang, Jianming Fan, Haofei Zhou, Daolin Wang, Chang Zhou, Baohua Zhu, Qiang He
Summary: Janus micromotors powered by enzymes and functionalized with upconversion nanoparticles can efficiently move and detect uric acid in urine, showing promise for multifunctional micro/nanomotors in bioassay and biomedical applications.
JOURNAL OF MATERIALS CHEMISTRY B
(2022)
Article
Chemistry, Analytical
Keke Ning, Yao Fu, Jianghong Wu, Yujie Sun, Ke Liu, Kang Ye, Jiaxin Liu, Yuan Wu, Jiangong Liang
Summary: In this study, sulfur quantum dots (SQDs) were synthesized using a simple H2O2 assisted top-down method and applied in alkaline phosphatase (ALP) detection. By measuring the red shift in emission wavelength and fluorescence intensity quenching, a dual-sensor platform based on red shift of emission wavelength (RSEW) and fluorescence quenching of SQDs was successfully constructed. The platform exhibited high sensitivity and selectivity towards ALP and was able to detect ALP in serum samples and cells.
ANALYTICAL METHODS
(2022)
Article
Chemistry, Physical
Tingting Yan, Xiao-Yu Zhang, Yue Zhao, Wei-Yin Sun
Summary: This study developed two stable Zr(IV)-based coordination polymers with incorporated electroactive metal-terpyridine moieties, which showed enhanced performance for electrochemical dopamine sensing. The CPs exhibited large diffusion coefficients and fast electron transfer rates, resulting in excellent detection performance and high selectivity.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Polymer Science
Nuria Borras, Alejandra Sanchez-Sanz, Jordi Sans, Francesc Estrany, Maria M. Perez-Madrigal, Carlos Aleman
Summary: In this study, a flexible self-supported membrane acting as an electrode has been developed for dopamine detection. The membrane consists of PLA layers and electroactive copolymer layers, allowing sensitive detection of dopamine in a urea-rich environment. This flexible electrode has potential applications in diagnosing patients with paragangliomas and neuroblastomas, who typically have dopamine concentrations between 2 and 7 μM.
EUROPEAN POLYMER JOURNAL
(2023)
Article
Chemistry, Analytical
Chao Wang, Mohamed Ibrahm Halawa, Baohua Lou, Wenyue Gao, Jianping Li, Guobao Xu
Summary: The study discovered a sensitive method for detecting ascorbic acid (AA) using the chemiluminescence reaction between luminol and artemisinin (ART). This method was successfully applied to detect AA in vitamin C tablets and showed good recovery rates and stability.
Article
Chemistry, Multidisciplinary
X. Liu, J. Song, B. Yin, T. Jiang, H. Pang, L. Yang, S. Wu
Summary: In this study, a powerless, gas-permeable, flexible and transparent ascorbic acid biosensor based on carbon micromesh electrode was developed. The biosensor showed excellent performances including high transmittance, wide detection range, low limit of detection, good selectivity, and long-term storage stability. By integrating a pH-sensing electrode, the analysis of ascorbic acid can be corrected. The biosensor demonstrated good sensitivity and practicability towards wearable electronics in the detection of artificial tears.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Xinlei Zhang, Peng Liu, Bohan Li, Xianliang Li, Yan Xu
Summary: By utilizing hydrogen bond interactions, carbon dots were successfully confined into a zirconium-based MOF material, forming the composite CDs@UiO-66(COOH)(2). This composite exhibited excellent detection performance for chlortetracycline and showed stimuli-response towards pH and temperature changes. This work opens a new avenue for multifunctional fluorescent sensing applications.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Xincheng Sun, Peng Lei, Xiaoran Zhang, Qi Wang, Bei Li, Shaomin Shuang, Chuan Dong
Summary: A g-C3N4/BSA@MnO2 fluorescent off-on probe was constructed for sensitive and selective detection of ascorbic acid (AA). BSA@MnO2 nanoparticles were anchored on the surface of g-C3N4 NSs via electrostatic attraction to synthesize the nanocomposites, which realized the fluorescent off-on detection of AA through the redox reaction between AA and MnO2. The nanoprobe exhibited a satisfactory linear range of 0-120 μM and a limit of detection of 133 nM, and showed excellent properties for AA detection in food and drug samples as well as fluorescent imaging of exogenous AA in Raw cells, broadening the biochemical analysis applications of g-C3N4-based nanomaterials.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Analytical
Clarice Cortes, John C. Mantilla, Sebastiao W. da Silva, Giuseppe A. Camara, M. Janete Giz
Summary: Monitoring neurotransmitter concentrations in the brain is crucial for studying and diagnosing neurological diseases, but sensitivity has been a challenge. In this study, a new electrochemical sensor using graphene oxide and platinum micro particles was developed for simultaneous determination of epinephrine, ascorbic acid, and uric acid. The sensor exhibited excellent catalytic activity and wide linear response ranges for all three species. It can also determine epinephrine in the presence of other substances and is feasible for application in biological fluids.
MICROCHEMICAL JOURNAL
(2023)
