Article
Chemistry, Multidisciplinary
Saheed O. Sanni, Theo H. G. Moundzounga, Ekemena O. Oseghe, Nils H. Haneklaus, Elvera L. Viljoen, Hendrik G. Brink
Summary: This study synthesized water-soluble fluorescent carbon dots through a green method and demonstrated their potential for selective detection of Cu2+ ions. These synthesized fluorescent carbon dots have great application potential in wastewater treatment and monitoring.
Article
Spectroscopy
Xiaowei Mu, Xiaona Song, Dejiang Gao, Pinyi Ma, Qiong Wu, Daqian Song
Summary: A novel type of red-emitting carbon dots, TN-CDs, was created using a one-step hydrothermal approach with neutral red and tartaric acid as raw materials. TN-CDs exhibited fluorescence quenching and color change in the presence of increasing water content, and could be used for fast water detection in various organic solvents. Additionally, a reusable test strip was prepared and combined with TN-CDs for real-time, on-site visual quantitative detection of water content using smartphone software, a UV lamp, and a dark chamber.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Chemistry, Analytical
Xiangcao Li, Qian Hu, Ke Yang, Shaojing Zhao, Shaohua Zhu, Benhua Wang, Yi Zhang, Jianing Yi, Xiangzhi Song, Minhuan Lan
Summary: In this study, red fluorescent carbon dots (CDs) were synthesized for the simultaneous detection and reduction of Au3+ in contaminated water within 2 minutes. The CDs exhibited dual colorimetric and fluorescent spectral response, high sensitivity and selectivity towards Au3+, and a low detection limit of 29 nM. Moreover, the CDs selectively reduced Au3+ to Au-0 through a redox reaction, allowing for effective detection and extraction of Au3+ without interference from other metal ions.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Physical
Weiying Zhou, Fuwang Mo, Zishan Sun, Jiabao Luo, Jiaqi Fan, Hongni Zhu, Zhenpeng Zhu, Jinqing Huang, Xinguo Zhang
Summary: In this study, bright red-emitting P, Br-doped carbon dots (CDs) were successfully synthesized with high quantum yield. The P, Br-CDs showed sensitive detection ability towards copper ions and L-cysteine, indicating their great potential for biological and environmental applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Spectroscopy
Yuexia Zhang, Xiaopeng Fan, Xuansen Sun, Xintong Yang, Zhongping Li, Zhenhua Yang, Chuan Dong
Summary: In this study, oil-soluble carbon dots were successfully fabricated and applied for the detection of doxycycline in milk. These carbon dots showed high sensitivity and potential for real sample applications.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2024)
Article
Biochemistry & Molecular Biology
Tengfei Wang, Hui Luo, Xu Jing, Jiali Yang, Meijun Huo, Yu Wang
Summary: In this study, water-soluble fluorescent carbon dots were synthesized using a hydrothermal method and a CDs/Fe3+ composite was prepared for the determination of ascorbic acid content, showing good recognition and a linear relationship. Satisfactory results were achieved when this method was applied to the determination of ascorbic acid in jujube fruit.
Article
Spectroscopy
Nayomi Camilus, Stephanie Gao, Musonda Mitti, Jun-Ray Macairan, Rafik Naccache, Sanela Martic
Summary: The post-translational modification of amino acids plays a critical role in normal and diseased biological states. This study achieved selective detection of nitrotyrosine (nTyr) using dual-fluorescent carbon dots (CDs), even in the presence of common biological interferences. These findings highlight the potential of CDs as viable sensors for key biological modifications.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Review
Chemistry, Multidisciplinary
Xueping Song, Siyu Zhao, Ying Xu, Xinrui Chen, Shuangfei Wang, Peitao Zhao, Yunqiao Pu, Arthur J. Ragauskas
Summary: This article summarizes the recent research progress in the preparation of carbon dots from lignocellulosics. It reviews the traditional and new preparation methods, physical and chemical properties, optical properties, and applications of these carbon dots. The challenges of synthesizing lignocellulosic carbon dots are highlighted, and current trends and opportunities are examined, with some suggestions for future research.
Article
Chemistry, Analytical
Ningxin Kong, Hao Yuan, Huangmei Zhou, Yu Zhao, Sanjun Zhang
Summary: The water content in solvents can be accurately detected using fluorescent Ag nanoclusters with the help of a smartphone. The G/B values showed a linear relationship with water content in ethanol, with a detection limit of 4.48%. The method showed good consistency when applied to real samples like white wine and medical alcohol.
ANALYTICAL METHODS
(2021)
Article
Chemistry, Applied
Fang-Fang Guo, Wei-Na Wu, Xiao-Lei Zhao, Yuan Wang, Yun-Chang Fan, Chuan-Xiang Zhang, Zhi-Hong Xu
Summary: Carboxylesterases (CEs) play an important role in the biotransformation of ester-containing compounds, and abnormal CEs levels are associated with various diseases. In this study, a novel water-soluble probe was developed to detect CEs activity and successfully applied in animal experiments.
Article
Chemistry, Analytical
Christian Chimeno-Trinchet, Maria Emilia Pacheco, Alfonso Fernandez-Gonzalez, Rosana Badia-Laino
Summary: A fast and efficient method was developed to obtain europium(III)-doped surface-modified carbon dots with a hydrophobic coating. The surface functionalization improved the dispersibility of the nanoparticles in non-polar media and modified the accessibility of water molecules to the europium ions. The developed nanochemosensor showed high stability in both photoluminescent signal intensity and dispersions, and had a low detection limit and fast response time for water determination in toluene.
Article
Spectroscopy
Niloufar Amin, Abbas Afkhami, Leila Hosseinzadeh, Ali Amin, Tayyebeh Madrakian
Summary: A nanofiber-based sensing platform for sensitive and on-site doxorubicin detection was developed in this study. The sensor, which can be coupled with smartphone technology, showed potential for detecting intracellular DOX for enhancing cell proliferation, making it a multimodal tool in biomedical research and clinical diagnostics.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Chemistry, Analytical
Enoch Kwasi Adotey, Mehdi Amouei Torkmahalleh, Philip K. Hopke, Mannix P. Balanay
Summary: The development of a fluorescent sensor for the detection of toxic pollutants in the environment has attracted much attention. In this study, fluorescent carbon dots (N,Zn-CDs) doped with nitrogen and zinc were synthesized and used as a fluorescence probe for the sensitive detection of hexavalent chromium ions (Cr(VI)). Zinc metal integrated into the N,Zn-CDs played a functional role by creating a coordination site for hydrogen ions displaced after the addition of Cr to the solution. The fluorescence intensity of N,Zn-CDs was effectively quenched by the stepwise addition of Cr(VI), attributing to the internal filter effect. The detection limit achieved for Cr(VI) in fluorescence experiments was 0.47 nmol/L. Real water samples were used to validate the practical application of N,Zn-CDs, showing acceptable recoveries and agreement with ion chromatography-ultraviolet spectrometry results.
Article
Spectroscopy
Linlin Wang, Jayasmita Jana, Jin Suk Chung, Won Mook Choi, Seung Hyun Hur
Summary: Low-cost nitrogen and boron-doped carbon nanodots (CPAP-CDs) with high quantum yield were synthesized through a facile hydrothermal treatment. These CPAP-CDs showed wide absorption, strong fluorescence, and pH-dependent behavior, making them suitable for detecting nitrite ions. The method had a low detection limit, wide linear detection range, and was successfully applied to different water samples testing.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Review
Chemistry, Applied
Yongming Guo, Ruiqing Wang, Chengwei Wei, Yijin Li, Tiancheng Fang, Tao Tao
Summary: NO2- is commonly found in foods and the environment, and excessive intake poses serious hazards to human health. Traditional instrumental approaches for detection of NO2- are limited by expensive instruments and complicated operations. The emergence of carbon quantum dots (CQDs) provides a solution with their integrated merits, including easy fabrication, low-cost, high quantum yield, excellent photostability, tunable emission behavior, good water solubility, and low toxicity. This review presents the synthetic strategies of CQDs and highlights their advances in fluorescent detection of NO2-, while also discussing the challenges and perspectives in the field.
Article
Chemistry, Analytical
Gang Qu, Yuxin Zhao, Qiaoli Zhang, Jina Wu, Xiaosen Li, Yang Yang, Shilei Liu
Summary: In this study, magnetic mesoporous materials combined with real-time in situ mass spectrometry were used for the high-throughput detection of hydrolyzed products of organophosphorus nerve agents. The method showed good linearity, low limits of detection and quantification, and high extraction recoveries. The magnetic preparation method used was quick, cost-effective, rugged, and safe. The results demonstrated the potential of this method for rapid and efficient determination of the target analytes in environmental samples.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Anna Hildebrand, Mariam Merchant, Danny O'Hare
Summary: Substandard and falsified artemisinin derivatives in antimalarials have caused significant deaths and economic losses. This study evaluates the feasibility of voltammetric methods for identifying and quantifying artemether. The findings suggest that electrochemical analysis shows promise as a method for artemether identification and quantification.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Marx Osorio Araujo Pereira, Alvaro Ferreira Junior, Edson Silvio Batista Rodrigues, Helena Mulser, Giovanna Nascimento de Mello e Silva, Wallans Torres Pio dos Santos, Eric de Souza Gil
Summary: Brazilian spotted fever (BSF) is a serious and rapidly evolving disease. A new impedimetric immunosensor was developed for rapid diagnosis by measuring specific antibodies in plasma. The sensor demonstrated selectivity and accuracy, and has potential for important applications in diagnostic testing.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Kathrin Schilling, Ronald A. Glabonjat, Olgica Balac, Marta Galvez-Fernandez, Arce Domingo-Relloso, Vesna Slavkovich, Jeff Goldsmith, Miranda R. Jones, Tiffany R. Sanchez, Ana Navas-Acien
Summary: Analysis of trace elements in urine is an important tool for assessing exposures, diagnosing nutritional status, and guiding public health and healthcare intervention. This study provides a sensitive method for analyzing 18 elements in urine samples, using only 100 μL. The results show good accuracy and sensitivity of the method.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Mengya Li, Shijie Liu, Shiliang Guo, Dong Liang, Miaoyun Li, Yaodi Zhu, Lijun Zhao, Jong-Hoon Lee, Gaiming Zhao, Yangyang Ma, Yanxia Liu
Summary: In this study, a magnetic flow device was developed to purify spores in a culture medium system. The device used magnetic nanoparticles to absorb vegetative cells, separating them from the spores. The achieved purity of the collected spores was over 95%. The study also demonstrated a rapid quantitative detection method using Raman spectroscopy.
ANALYTICAL METHODS
(2024)
Article
Chemistry, Analytical
Wanqiong Liu, Zixuan Wu, Jianwei Peng, Zebin Xu, Yong Liang
Summary: Metal-organic frameworks (MOFs) are effective carriers for molecular imprinting, but their poor dispersibility in aqueous solution is a significant drawback. In this study, we have applied amphiphilic block copolymers and molecularly imprinted technology on MOFs to improve the hydrophilicity of molecularly imprinted fluorescent materials.
ANALYTICAL METHODS
(2024)