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
Chemistry, Applied
Sariga, Mrinalini Kalyani Ayilliath Kolaprath, Libina Benny, Anitha Varghese
Summary: Carbon quantum dots (CQDs) synthesized from the leaves of Polyalthia longifolia (p-CQDs) were used as a fluorescence probe to detect the presence of Cd2+. The p-CQDs exhibited good water solubility, appreciable photostability, and a quantum yield of 22%. The fluorescent probe showed high selectivity and sensitivity for Cd2+ detection, and was successfully applied to analyze groundwater and industrial effluent samples.
Article
Spectroscopy
Mosayeb Chaghaghazardi, Soheila Kashanian, Maryam Nazari, Kobra Omidfar, Yvonne Joseph, Parvaneh Rahimi
Summary: Nitrogen and sulfur co-doped carbon quantum dots (N,S-CQD) were synthesized and used as a selective fluorescent probe for the detection of mercury ions (Hg2+). The probe showed high sensitivity and could detect trace amounts of Hg2+ in water samples.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Physical
YingTe Wang, RongRong Wu, YuanYuan Zhang, SiRong Cheng, Yong Zhang
Summary: N-doped carbon dots (N-CDs) with green fluorescence were synthesized by hydrothermal reaction using o-aminophenol and ethylenediamine as carbon and nitrogen sources, and they exhibited a quantum yield of 38.4%. The N-CDs were characterized by FT-IR, XPS, UV-vis, and fluorescence spectroscopy, confirming their excellent fluorescence properties and stability. Furthermore, the N-CDs were utilized as a sensor for Ag+ detection through static quenching effect, with a linear range of 30-210 μmol/L and a detection limit of 4.7 μmol/L. The N-CDs also showed potential applications in bioimaging for Ag+ sensing.
JOURNAL OF MOLECULAR STRUCTURE
(2023)
Article
Spectroscopy
Guiqiao Wang, Shurong Zhang, Jinzhi Cui, Wensu Gao, Xing Rong, Yaxin Lu, Canzhu Gao
Summary: A fluorescent signal-closing probe based on nitrogen-doped carbon quantum dots (NCQDs) was developed for quantitative detection of mercury ions (Hg2+). The NCQDs showed high selectivity and excellent anti-interference ability, and the detection system had a linear relationship between fluorescence quenching efficiency and Hg2+ concentration. The detection limit was 0.9 μM.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Spectroscopy
Rut Martinez-Moro, Maria del Pozo, Elena Casero, Maria Dolores Petit-Dominguez, Carmen Quintana
Summary: A novel fluorescence sensor based on MoS2 quantum dots incorporated into PVC membranes has been designed for the analysis of synthetic colorants. The quenching effect of different colorants on the fluorescence emission of MoS2 quantum dots was evaluated, and the optimized methodology for the determination of quinoline yellow using this sensor was developed. The sensor showed good agreement with HPLC-UV-vis measurements in the determination of quinoline yellow in a food colour paste.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Analytical
Raji Atchudan, Somasundaram Chandra Kishore, Thomas Nesakumar Jebakumar Immanuel Edison, Suguna Perumal, Rajangam Vinodh, Ashok K. Sundramoorthy, Rajendran Suresh Babu, Muthulakshmi Alagan, Yong Rok Lee
Summary: This paper presents a method for developing a fluorescent chemosensor for Fe3+ ions using hydrophilic carbon dots, synthesized from Oxalis corniculata through a simple, cost-effective, and environmentally friendly hydrothermal synthesis process. The resulting O-CDs exhibit good physical and chemical properties, high quantum yield, and stable fluorescence, making them suitable for sensitive and selective detection of Fe3+ ions in aqueous solutions. This nanosensor shows promise for biomedical applications due to its high biocompatibility and cellular imaging capabilities.
Article
Spectroscopy
Furkan Burak Sen, Nilay Begic, Mustafa Bener, Resat Apak
Summary: In this study, a fluorescent polyethylenimine capped carbon quantum dots (PEI-C-dots) probe was synthesized and used to detect TNT residues. The synthesized PEI-C-dots exhibited high fluorescence quantum yield and low detection limit for TNT. The detection of TNT was not interfered by similar structured explosives, common soil ions, and camouflage agents.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Chemistry, Analytical
Lorenzo Gontrani, Elvira Maria Bauer, Alessandro Nucara, Pietro Tagliatesta, Marilena Carbone
Summary: In this study, nanometric particles with high specificity for silver cations were prepared by hydrothermal synthesis using citric and folic acid solutions. These particles showed strong fluorescence emission in the violet region when excited at 330 nm and could be selectively quenched by sub-nanomolar concentrations of silver (I) cations.
Review
Chemistry, Inorganic & Nuclear
Rafael C. Castro, David S. M. Ribeiro, Joao L. M. Santos
Summary: Research has focused on developing fast, efficient, cost-effective, and easy to handle analytical methodologies for on-site monitoring of various analytes. This work examines fluorescence-based visual detection methods using quantum dots, discussing strategies for implementing sensing platforms and enhancing sensitivity and selectivity.
COORDINATION CHEMISTRY REVIEWS
(2021)
Article
Environmental Sciences
Yi Sun, Qingxiang Zhou, Xueying Sheng, Shuanying Li, Yayan Tong, Jinghan Guo, Boyao Zhou, Jingyi Zhao, Menghua Liu, Zhi Li, Yanhui Li, Tongxu Qu, Chunmao Chen
Summary: A fluorescent sensor was constructed using carbon quantum dots with high selectivity and sensitivity towards benzo[a]pyrene, showing great potential for practical application. The sensor exhibited excellent linearity and a low limit of detection, while also being simple, rapid, cost-effective, and stable.
Article
Chemistry, Inorganic & Nuclear
Hema Sindhuja George, Hosimin Selvaraj, Andivelu Ilangovan, Karthikeyan Chandrasekaran, Velu Rajesh Kannan, Punniyakotti Parthipan, Bader O. Almutairi, Ranjith Balu
Summary: Heavy metal ions pose a serious threat to the environment and human health, making their detection and removal crucial. This study demonstrates the successful conversion of papaya seeds into water-soluble carbon dots, which show excellent sensitivity and detection capabilities for Fe3+ ions.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Biochemical Research Methods
Jierong Xie, Zhaofeng Wu, Jun Sun, Changwu Lv, Qihua Sun
Summary: Green and economical self-doped nitrogen-containing fluorescent carbon quantum dots (N-CQDs) were synthesized using a one-pot hydrothermal treatment method. The optical and structural properties of N-CQDs were investigated, and their sensitivity and selectivity to Cr (VI) were demonstrated. The study also explored the quenching mechanism of N-CQDs by Cr (VI).
JOURNAL OF FLUORESCENCE
(2023)
Article
Spectroscopy
Manal A. Alossaimi, Abdulmalik S. A. Altamimi, Heba Elmansi, Galal Magdy
Summary: A new spectrofluorimetric method based on nitrogen-doped carbon quantum dots (N-CQDs) fluorescent probes was proposed for the determination of larotrectinib. The method is simple, involves no pre-treatment steps or complicated techniques, and showed sufficient sensitivity for the analysis of the drug. The synthesized N-CQDs exhibited high fluorescence intensity, allowing for the selective quenching and sensitive determination of larotrectinib.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Analytical
Yanqu Zhou, Mei Liu, Xiuxiu Liu, Rulan Jiang, Yunan He, Qian Yao, Hong Chen, Chunmei Fu
Summary: In this study, a novel nitrogen-doped carbon dots (N-CDs) were synthesized using quercetin as the carbon source and o-phenylenediamine as the nitrogen source. The N-CDs showed good water solubility and photostability with a fluorescence quantum yield of 6.45%. The N-CDs were used as fluorophores for the selective and sensitive determination of oxytocin, providing a rapid, sensitive, specific, and accurate analysis platform for quality inspection of oxytocin.
JOURNAL OF PHARMACEUTICAL AND BIOMEDICAL ANALYSIS
(2023)
Article
Engineering, Environmental
Olubukola S. Alimi, Jeffrey M. Farner, Nathalie Tufenkji
Summary: Nanoplastics exposed to freeze-thaw cycles in cold climates tend to aggregate and have reduced mobility, especially at low ionic strengths, despite the presence of natural organic matter. While NOM can enhance nanoplastic mobility, it cannot prevent aggregation under freeze-thaw conditions.
Correction
Engineering, Environmental
Bahareh Asadishad, Shawninder Chahal, Ali Akbari, Vanessa Cianciarelli, Mehrnoosh Azodi, Subhasis Ghoshal, Nathalie Tufenkji
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Shiva Naseri, Gabriele Griffanti, William C. Lepry, Vimal B. Maisuria, Nathalie Tufenkji, Showan N. Nazhat
Summary: Borate-based glasses have attracted great interest for wound healing applications due to their ability to incorporate therapeutic ions and release them at the repair site. Silver-doped borate glasses showed dose-dependent antibacterial activity against Pseudomonas aeruginosa and were non-toxic to keratinocytes, promoting their growth and migration. Compositions containing 0.3 and 0.5 mol.% Ag significantly accelerated keratinocyte migration in an in vitro wound healing model.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Engineering, Environmental
Brian Nguyen, Nathalie Tufenkji
Summary: This study developed a technique to label and image nanoplastics with high resolution, allowing for precise localization, differentiation from free dye, and quantitative analysis in environmental samples.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Editorial Material
Green & Sustainable Science & Technology
Mathieu Lapointe, Chelsea M. Rochman, Nathalie Tufenkji
NATURE SUSTAINABILITY
(2022)
Article
Engineering, Chemical
Mathieu Lapointe, Heidi Jahandideh, Jeffrey M. Farner, Nathalie Tufenkji
Summary: The developed fiber-based materials improve settling in water treatment processes, reduce the usage of chemicals, and effectively remove contaminants. The super-sized flocs produced by these materials can be easily removed without the need for expensive settling tanks, and they can be recovered for reuse.
Article
Nanoscience & Nanotechnology
Amin Valiei, Nicholas Lin, Geoffrey McKay, Dao Nguyen, Christopher Moraes, Reghan J. Hill, Nathalie Tufenkji
Summary: This study investigates the effect of hydrophobicity on the bactericidal activity of nanopillar-textured surfaces. The results show that superhydrophilic surfaces have the highest bactericidal activity, while increasing hydrophobicity diminishes the bactericidal effect.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Biomaterials
Nicholas Lin, Amin Valiei, Geoffrey McKay, Dao Nguyen, Nathalie Tufenkji, Christopher Moraes
Summary: The self-assembled ZnO nanopillars synthesized at high surface density possess anti-biofouling properties by promoting the detachment of bacterial cells from the surface.
ACS BIOMATERIALS SCIENCE & ENGINEERING
(2022)
Article
Engineering, Environmental
Jun-Ray Macairan, Brian Nguyen, Frank Li, Nathalie Tufenkji
Summary: An effective methodology is required to detect unlabeled microplastics in environmental samples in order to understand the biological impacts of plastic pollution. Current methods rely on digestion protocols which can result in the loss of spatial information and smaller plastics. The use of fluorescence microscopy for visualization is limited by nonspecific labeling strategies. A new method of nonspecific labeling with tissue-clearing technique is developed, allowing clear visualization of internalized microplastics. The method is demonstrated in living aquatic organisms and a model vertebrate.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Olubukola S. Alimi, Dominique Claveau-Mallet, Mathieu Lapointe, Thinh Biu, Lan Liu, Laura M. Hernandez, Stephane Bayen, Nathalie Tufenkji
Summary: In this study, we investigated the changes in physicochemical properties of polystyrene microplastics generated from a disposable cup due to UV-weathering, and their impact on microplastic transport potential and contaminant sorption ability in simulated freshwaters. UV exposure led to a decrease in microplastic hydrophobicity, increase in density, carbonyl index, and microscale roughness. Settling velocity also increased, indicating enhanced deposition to sediments. Weathered microplastics showed reduced sorption capacity for a hydrophobic contaminant compared to unaged ones. These findings provide new insights into the risks and behavior of microplastics in aquatic environments.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Mathieu Lapointe, Rafael S. Kurusu, Laura M. Hernandez, Nathalie Tufenkji
Summary: New iron grafted cellulose fibers were developed for wastewater treatment to improve removal of contaminants. These fibers increased floc size and allowed for compact screening technology instead of settling tanks. When combined with a coagulant and flocculant, the fibers significantly increased nanoplastics removal and removed a high percentage of BTEX contaminants. Additionally, the fibers were washable and reusable, reducing operational costs and providing environmental benefits.
Article
Environmental Sciences
Laura M. Hernandez, Jeffrey M. Earner, Dominique Claveau-Mallet, Mira Okshevsky, Heidi Jahandideh, Sara Matthews, Ranjan Roy, Varoujan Yaylayan, Nathalie Tufenkji
Summary: This study presents an optimized procedure for using Nile red as a fluorescent staining agent to pre-screen microplastics in bottled water. The appropriate concentration of Nile red is crucial for obtaining accurate particle counts. The method was successfully used to screen microplastics in different brands of bottled water, and chemical characterization and qualitative analysis techniques were employed to identify the composition of the particles.
Article
Biochemical Research Methods
Fazel Abdolahpur Monikh, Anders Baun, Nanna B. Hartmann, Raine Kortet, Jarkko Akkanen, Jae-Seong Lee, Huahong Shi, Elma Lahive, Emilia Uurasjarvi, Nathalie Tufenkji, Korinna Altmann, Yosri Wiesner, Hans-Peter Grossart, Willie Peijnenburg, Jussi V. K. Kukkonen
Summary: This study proposes an exposure protocol that takes into account the particle-specific properties and dynamic behavior of micro- and nanoplastics (MNPs). It describes the production and characterization of more realistic MNPs as well as the development of toxicity tests in soil and aquatic environments. The protocol can be applied by students, academics, environmental risk assessors, and industries.
Article
Nanoscience & Nanotechnology
Nicholas Lin, Geoffrey Mckay, Dao Nguyen, Christopher Moraes, Nathalie Tufenkji
Summary: Mechano-bactericidal nanopillars, with specific width and spacing, were found to exhibit antibacterial properties that are dependent on bacterial concentration. Bioluminescence monitoring was shown to be a promising tool for evaluating the efficacy of such nanopillars as antibacterial coatings.
ACS APPLIED NANO MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Heidi Jahandideh, Jun-Ray Macairan, Aram Bahmani, Mathieu Lapointe, Nathalie Tufenkji
Summary: This review provides a detailed analysis of different fabrication methods for porous graphene-based structures, with a focus on graphene oxide as the base material. The morphologies, mechanical responses, and common applications are discussed. By correlating the graphene oxide concentration with pore size, unexplored areas are identified.