Article
Nanoscience & Nanotechnology
Yancong Liu, Xin Kang, Yiqian Xu, Yaorui Li, Shuang Wang, Chunyan Wang, Weiquan Hu, Ruihong Wang, Jiancong Liu
Summary: In this study, the afterglow emission of CDs@SiO2 composites was modulated by controlling the carbonization degree of CDs through different calcining temperatures. The changes in carbonization degree of CD structures led to alterations in energy levels and long-lived excited states (LEST), thus affecting the afterglow luminescence behaviors of the composites.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Analytical
Panpan Wang, Junxia Wang, Tingting Liu, Zhengpeng Sun, Ming Gao, Kai Huang, Xuedong Wang
Summary: Loquat fruit is a high nutrition fruit that causes waste due to its short storage period. Carbon quantum dots (CQDs) based on loquat fruit were fabricated using a facile and green hydrothermal method. The CQDs showed different colors under daylight and UV light, with high fluorescence quantum yield. The addition of MnO4- quenched the fluorescence intensity of the CQDs, allowing them to be used as a sensitive ON-OFF nanoprobe for detection. The CQDs exhibited a wide linear range and low detection limit for MnO4- in environmental waters, with good selectivity and anti-interference capacity.
MICROCHEMICAL JOURNAL
(2022)
Article
Nanoscience & Nanotechnology
Wenjing Chen, Hong Lin, Yunying Wu, Meng Yang, Xianjing Zhang, Shihua Zhu, Maoting He, Jianxin Xie, Zhengjun Shi
Summary: Nitrogen-doped carbon dots (N-CDs) were prepared from Auricularia auricula using a one-step hydrothermal method. The N-CDs exhibited spherical morphology with an average particle size of 2.85 nm. The excitation and emission wavelengths of the N-CDs were optimized at 324 nm and 400 nm, respectively. The N-CDs showed fluorescence quenching due to the inner filter effect (IFE) formed between the N-CDs and MnO4-. A linear relationship was observed between the fluorescence quenching intensity and the concentration of MnO4-, with a detection limit of 0.12 μM. The proposed method was successfully applied to the detection of MnO4- in polluted water, showing good recovery rates. The synthesized N-CDs offer significant potential for trace MnO4- detection in environmental evaluation.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Jesna K. George, Shwetharani Ramu, Vishaka V. Halali, R. Geetha Balakrishna
Summary: Perovskite quantum dots (PQDs) exhibit exceptional fluorescence property and are potential candidates for fluorescent metalion sensors. The study reveals the significance of inner filter effect (IFE) in perovskite sensing systems, which enhances detection limits. Two different sensing systems for Co2+ were developed with elucidation of the fluorescence quenching mechanism, a combination of FRET and IFE, and successful modification of PQDs to reduce IFE.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Nanoscience & Nanotechnology
Guanxiong Liu, Baoqiang Li, Jie Li, Jiaxin Dong, Vladimir Baulin, Yujie Feng, Dechang Jia, Yuri V. Petrov, Aslan Yu Tsivadze, Yu Zhou
Summary: EGTA-derived carbon dots (EGTA-CDs) exhibit bone-targeting ability with a synthetic yield of 87.6%. EGTA-CDs show superior calcium ion affinity and better bone affinity compared to other derived carbon dots, indicating their potential as novel bone-targeting drugs.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Agricultural Engineering
Dandan Guo, Yuang Wang, Ying Gao, Yinong Lyu, Yunhao Lin, Yueshen Pan, Lin Zhu, Yuezhao Zhu
Summary: Nitrogen has a significant influence on the properties of microwave-assisted hydrothermal carbonization (MHTC) products of Spirulina platensis. The study investigated the effects of temperature and time on the distribution of products and nitrogen migration in MHTC. Results showed that increasing temperature led to a decrease in nitrogen content in hydrochar and an increase in amine-N content in carbon dots.
BIORESOURCE TECHNOLOGY
(2022)
Article
Chemistry, Physical
Yingfang Tao, Jie Lin, Deyin Wang, Yuhua Wang
Summary: A new type of carbon dots capable of emitting blue and cyan light in aqueous and solid states respectively have been synthesized using a simple hydrothermal method. The change in emission properties of solid state carbon dots is attributed to surface state change caused by aggregation, which can be stabilized by surface functionalization with Na+ ions. Proof-of-concept study shows the potential application of these carbon dots in anti-counterfeiting inks and high quality printing of fluorescent images.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Review
Chemistry, Analytical
H. K. Melvin Ng, G. K. Lim, C. P. Leo
Summary: Carbon dots (CDs) are nanomaterials with photoluminescence properties useful for detecting hazardous materials, synthesized from biowaste and chemicals through methods like hydrothermal and microwave-assisted synthesis. Additional dopants like nitrogen and sulfur can enhance their performance, and immobilization into a solid substrate allows for reuse. Interaction with heavy metals enables quantification of heavy metal concentrations in water samples.
MICROCHEMICAL JOURNAL
(2021)
Article
Chemistry, Analytical
Mengzhu Wang, Bangxiang Liu, Jinjin Liu, Hengjia Zhu, Qinqin Bai, Panwang Hu, Jianming Pan, Hao Liang, Xiangheng Niu
Summary: Considering the threats of nitrite in food, it is important to develop a portable and dependable method for its detection. This study proposes a smartphone-integrated paper sensor based on manganese-doped silicon quantum dots for the visual dual-mode detection of nitrite. The sensor offers a naked-eye visible multicolor/multifluorescence response toward nitrite, demonstrating good specificity, performance stability, and practicality in food analysis.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Nanoscience & Nanotechnology
Zhen Mao, Hui Li, Na Gan, Zili Suo, Huan Zhang, Qiang Zhao
Summary: This study focuses on the effect of fixed carbon source and different dopants on the structure and properties of carbon dots (CDs). By synthesizing three different CDs using various dopants, it was found that nicotinamide (NAA) is an ideal dopant with significant contributions to the structure and properties of CDs.
Article
Chemistry, Physical
Dandan Guo, Yinong Lyu, Ying Gao, Yunhao Lin, Xitong Zhang, Yueshen Pan, Yuezhao Zhu
Summary: A simple and green method for synthesizing nitrogen-doped carbon dots from Chlorella pyrenoidosa using microwave-assisted hydrothermal carbonization was reported. High temperatures promoted nitrogen doping levels and fluorescence intensity, with the optimal temperature and time being 210 degrees C and 2 hours. The obtained carbon dots showed excitation-dependent blue fluorescence and could be used as fluorescence inks for security printing.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Multidisciplinary
Viviana Bressi, Alina M. Balu, Daniela Iannazzo, Claudia Espro
Summary: Carbon dots (CDs) are a new class of zero-dimensional nano-materials that have excellent properties such as photostability, biocompatibility, fluorescence, and ease of surface modification. The use of renewable biomass, especially waste biomass, for the synthesis of green CDs has gained significant attention as it provides a green solution to waste management goals and circular economy. This article highlights recent advances in the green synthesis and formation mechanism of CDs from biomass, with a focus on innovative one-pot hydrothermal and microwave processes.
CURRENT OPINION IN GREEN AND SUSTAINABLE CHEMISTRY
(2023)
Article
Environmental Sciences
Yongli Liu, Xiaoyan Su, Letian Chen, Huanjia Liu, Chunyuan Zhang, Jiali Liu, Jiayi Hao, Yu Shangguan, Guifen Zhu
Summary: A simple fluorescent sensor based on carbon dots was successfully designed for rapid detection of p-Aminoazobenzene (pAAB), showing good sensitivity and wide linearity range.
ENVIRONMENTAL RESEARCH
(2021)
Article
Engineering, Environmental
Daniel Torres, Victor Medina Bailon, Judith Dominguez Mendoza, Eric Masson, Guillermo Gonzalez-Sanchez, Lourdes Ballinas-Casarrubias, Salima Mabrouk, Raphael Schneider, Alain Celzard, Vanessa Fierro
Summary: In this study, flax by-products were subjected to hydrothermal treatment to identify potential applications for the resulting products. It was found that severities above 4.9 were optimal in terms of calorific value, production of organic products, photoluminescence quantum yield of carbon quantum dots, and CO2 capture by the resulting carbons.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Applied
Lin Yuan, Lei Jiang, Ze Liu, Yingying Xiang, Fei Song, Yujiao Tu
Summary: In this study, yellow-green fluorescent carbon dots were prepared using VB2 and citrate as precursors, and they showed great potential for detecting tartrazine and Hg2+. The N-CDs were purified and achieved excellent linear ranges and low detection limits. The quenching mechanisms of N-CDs fluorescence were also illuminated, and the nanoprobe was successfully applied to determine the content of tartrazine and Hg2+ in different samples.
Article
Chemistry, Analytical
Yujia Ying, Huilin Li
Summary: Enzymes play a crucial role as biological catalysts in accelerating biochemical reactions in living organisms. This study proposes a convenient method for monitoring enzymatic catalytic processes using native top-down mass spectrometry. By exploring the heterogeneity of the chymotrypsin sample and using tandem mass spectrometry, the researchers were able to monitor covalent and noncovalent enzymatic complexes, substrates, and products during catalysis. The results demonstrate that this method has the potential to be a promising tool for characterizing biocatalysts.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Kang Yang, Shuaibo Shi, Jinyu Wu, Shaolong Han, Shengdi Tai, Shishen Zhang, Kun Zhang
Summary: H2O and D2O are important analogues closely related to various industries and monitoring fields. This study successfully distinguishes and detects H2O and D2O by designing a novel eu(III)-macrocycle with dual emitters, Eu-2a, and conducting fluorescence titration experiments.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Julia Kuligowski, Alvaro Perez-Rubio, Marta Moreno-Torres, Polina Soluyanova, Judith Perez-Rojas, Ivan Rienda, David Perez-Guaita, Eugenia Pareja, Ramon Trullenque-Juan, Jose Castell, Marcha Verheijen, Florian Caiment, Ramiro Jover, Guillermo Quintas
Summary: This study introduces a novel variable selection approach called cluster PLS (c-PLS) to assess the joint impact of variable groups selected based on biological characteristics on the predictive performance of a multivariate model. The usefulness of c-PLS is shown using miRNomic and metabolomic datasets obtained from the analysis of liver tissue biopsies.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Meixue Lai, Lijie Zhong, Siyi Liu, Yitian Tang, Tingting Han, Huali Deng, Yu Bao, Yingming Ma, Wei Wang, Li Niu, Shiyu Gan
Summary: This study presents a method for constructing wearable sweat electrolyte sensors using carbon fiber-based solid-contact ion-selective electrodes (SC-ISEs). By using carbon fibers extracted from commercial cloth as electrode material, the cost and reproducibility issues of flexible SC-ISEs were addressed. The results showed that the carbon fiber-based SC-ISEs exhibited reversible voltammetric and stable impedance performances, and had high reproducibility of standard potentials between normal and bending states.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Ke Yang, Ying Liu, Min Deng, Peipei Wang, Dan Cheng, Songjiao Li, Longwei He
Summary: A near-infrared fluorescent probe has been developed to accurately measure the levels of peroxynitrite (ONOO-) in the endoplasmic reticulum (ER) in acute lung injury (ALI). The probe demonstrated rapid response, high selectivity, good sensitivity, and enhanced fluorescence intensity in response to ONOO-. It was successfully used to detect changes in ONOO- levels and showed significant increases in an ALI cell model and an ALI mouse model.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Yanping Wang, Yuemei Chen, Kejun Li, Jinrong Zhou, Xin Yuan, Mei Zhang, Ke Huang
Summary: In this work, a portable analytical system based on point discharge chemical vapor generation atomic emission spectrometry (PD-CVG-AES) coupling with gold filament enrichment was designed. The highly sensitive analysis of Hg2+ indirectly realized the detection of ascorbic acid (AA). The measurement is based on the fact that Ag+ can decrease the concentration of Hg2+ by forming Ag-Hg amalgam in the presence of the reductant SnCl2, while AA can pre-reduce Ag+ to Ag0, leading to the generation of silver nanoparticles (Ag NPs). The developed novel analytical strategy broadens the application of microplasma-based AES and offers a higher level of sensitivity compared to current AA detection techniques.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Yundi Huang, Bo Song, Kaiwen Chen, Deshu Kong, Jingli Yuan
Summary: This study developed two lysosome-targetable background-free TGL probes for efficient and accurate detection of 1O2, which can be used for monitoring endogenous 1O2 concentrations in lysosomes and discriminating variability induced by different photosensitizers. Furthermore, a smart luminescent sensor film was successfully prepared for on-site 1O2 production detection during PDT processes, offering a promising clinical monitoring tool for skin diseases.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Wei Lang, Jia-Mei Qin, Qian-Yong Cao
Summary: A novel polymer-based probe P1 was successfully synthesized for fluorescently ratiometric sensing of H2S with high selectivity and sensitivity. A smartphone sensing platform was constructed to conduct visual quantitative detection of H2S. P1 can be employed in evaluating the level fluctuations of H2S in living cells, testing water samples/wine samples, and monitoring food freshness.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Yuanyuan Qin, Shuda Liu, Shuyun Meng, Dong Liu, Tianyan You
Summary: The study developed a split aptamer-based sandwich-type ratiometric biosensor for the detection of 17 beta-estradiol (E2) using photoelectrochemical and electrochemical assays. The biosensor utilized split aptamer fragments to recognize E2 and trigger a hybridization chain reaction, resulting in the production of double-stranded DNA labeled with CdTe quantum dots. This DNA complex was able to sensitize CdTe quantum dots and generate response signals for E2 detection. The developed biosensor demonstrated high sensitivity and accuracy with two linear ranges and low detection limits.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Siriwan Teepoo, Jongjit Jantra, Khaunnapa Panapong, David Taiwo Ajayi
Summary: A novel immunochromatographic assay based on hyperbranched Au plasmonic blackbodies with a smartphone readout was developed for rapid and sensitive detection of leucomalachite green residues in fish and shrimp products.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Andrea L. Larraga-Urdaz, Borja Moreira-Alvarez, Jorge Ruiz Encinar, Jose M. Costa-Fernandez, Maria Luisa Fernandez-Sanchez
Summary: A major challenge in the 21st century is the development of point-of-care diagnostic tools. In this study, a highly sensitive and simple bioassay using AuNPs and MNAzymes was developed for rapid detection and quantification of miRNA-4739. The proposed strategy shows potential for breast cancer diagnosis.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Xiaohan Zhao, Anyu Wang, Lingzi Zhai, Jiuhe Gao, Sizhe Lyu, Yingshan Jiang, Tian Zhong, Ying Xiao, Xi Yu
Summary: A novel method using polystyrene-coated magnetic nanoparticles for extracting monohydroxy polycyclic aromatic hydrocarbons from urine samples was investigated. The proposed method is simple, sensitive, and efficient, with desirable sensitivity for analyzing low-abundance metabolites in large volumes of complex urine samples.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Ke Quan, Yuqing Zeng, Wenke Zhang, Fengfeng Li, Mengjiao Li, Zhihe Qing, Linlin Wu
Summary: In this study, a visual and reusable biosensor was developed for detecting substrates that are closely associated with human physiological health. The immobilized oxidase showed higher stability and sensitivity under harsh conditions, enabling reliable detection of substrates in complex fluids.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Dongjuan Wang, Xiuqian Ding, Jinling Xie, Juan Wang, Guanhao Li, Xin Zhou
Summary: In this study, a three-in-one sensor was developed for real-time detection of biogenic amines (BAs) with high sensitivity and selectivity. The sensor showed multimodal responses and could be used to fabricate portable devices for on-site non-destructive assessment of food spoilage indicators.
ANALYTICA CHIMICA ACTA
(2024)
Article
Chemistry, Analytical
Jinting Meng, Zihao Xu, Shasha Zheng, Hongqun Yang, Tianfu Wang, Hong Wang, Yingwei Zhang
Summary: This study demonstrates the development of a cascade signal amplification system using a multi-pedal DNA walker and strand displacement reactions for the electrochemical detection of miRNA-155. The biosensor exhibited high sensitivity, selectivity, and the potential for clinical applications.
ANALYTICA CHIMICA ACTA
(2024)