Article
Chemistry, Analytical
Malik Saddam Khan, Hafsa Ameer, Yuwu Chi
Summary: A novel and simple label-free electrochemiluminescence immunosensor was proposed using Ce2Sn2O7 nanocubes as ECL emitters, which were functionalized with gold nanoparticles to enhance ECL emission. The immunosensor showed improved ECL performance for detecting CEA concentrations, with outstanding stability, reproducibility, and specificity, making it an innovative method for sensitive analysis of biomarkers in real samples.
ANALYTICAL CHEMISTRY
(2021)
Article
Biochemistry & Molecular Biology
Yi-Ge Feng, Xiao-Yu Wang, Zhi-Wu Wang, Ai-Jun Wang, Li-Ping Mei, Xiliang Luo, Jiu-Ju Feng
Summary: Using porous nanomaterials as nanocarriers for immobilization and signal amplification of the probes, a label-free electrochemical immunosensor was efficiently designed for ultrasensitive detection of PCT. The immunosensor exhibited a good linear relationship and an ultra-low limit of detection.
BIOELECTROCHEMISTRY
(2021)
Article
Biophysics
Maitri Shah, Pratik Kolhe, Akanksha Roberts, Narlawar Sagar Shrikrishna, Sonu Gandhi
Summary: The uncontrolled use of antibiotics in animals has led to antibiotic-resistant bacteria in humans. To investigate antibiotic contamination in animal origin food products, a reduced graphene oxide-based immunosensor was developed for the sensitive detection of Penicillin G. The sensor showed excellent detection capabilities and was able to detect antibiotics in milk, eggs, and meat samples. The in-house developed antibodies displayed better sensitivity compared to commercial antibodies.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2022)
Article
Chemistry, Applied
Amit K. Yadav, Damini Verma, G. B. V. S. Lakshmi, Sergei Eremin, Pratima R. Solanki
Summary: This study presents a label-free immunosensing platform using molybdenum disulfide nanoparticles for electrochemical detection of ampicillin. The immunosensor showed high sensitivity, broad detection range, and excellent selectivity, stability, and reproducibility. Testing in milk, water, and orange juice confirmed the consistency and applicability of the immunosensor.
Article
Chemistry, Analytical
Agata Kowalczyk, Artur Kasprzak, Monika Ruzycka-Ayoush, Edyta Podsiad, Urszula Demkow, Ireneusz P. Grudzinski, Anna M. Nowicka
Summary: A novel sandwich-type voltammetric immunosensor has been designed for fast and ultrasensitive detection of SARS-CoV-2. The immunosensor showed a wide analytical range and low detection limit. Clinical samples testing demonstrated the practicality of the device. The main innovation of this sensor, compared to existing devices, is that the analytical signal is generated only after virus recognition.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Jairo Pinto de Oliveira, Francisco Burgos-Florez, Isabella Sampaio, Pedro Villalba, Valtencir Zucolotto
Summary: In this study, a label-free impedimetric immunosensor was developed to detect OTA in coffee. The biosensor showed high selectivity and was not affected by matrix interference in coffee samples. It has the advantages of small sample volume, short analysis time, and potential miniaturization.
Article
Biochemical Research Methods
Najib Ben Messaoud, Marilia Barreiros dos Santos, Ana Vieira, Alejandro Garrido-Maestu, Begona Espina, Raquel B. Queiros
Summary: Infectious diseases caused by A. salmonicida have significant impacts on aquaculture and fish farming. This study presents a portable label-free electrochemical immunosensor for the detection of A. salmonicida in seawater, which is sensitive and specific.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2022)
Article
Spectroscopy
Zhaleh Ghafary, Rahman Hallaj, Abdollah Salimi, Sudabeh Mafakheri
Summary: A novel, highly sensitive, simple and amplified fluorescence immunosensing strategy was designed for HBsAg detection using a sandwich type probe. The probe utilized MSN-Rh.B as a fluorescent mesoporous capsule and signal amplifier site, and Fe3O4 MNP as a probe collector site.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Electrochemistry
M. Azriouil, B. Chhaibi, A. Hrioua, F. Laghrib, A. Farahi, M. Bakasse, S. Lahrich, M. A. EL Mhammedi
Summary: The accumulation of pharmaceutical residues can have negative impacts on the environment and human health. This article describes the development of a carbon paste electrode sensor for detecting ciprofloxacin. The sensor showed high electrochemical performance and successfully monitored ciprofloxacin in various samples.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Water Resources
Sharmin Sultana, Boloram Karmaker, A. S. M. Saifullah, Md Galal Uddin, Md Moniruzzaman
Summary: This study aims to identify alternative components that can be used as natural coagulants by using different regional clays as coagulants. The removal efficiency of physical properties, chemical properties, and heavy metals from wastewater was investigated. The results showed that the coastal clay of Patuakhali can be an economically viable coagulant.
APPLIED WATER SCIENCE
(2022)
Article
Biophysics
Jiawei Gong, Tongtong Zhang, Tao Luo, Xuan Luo, Fei Yan, Weizhong Tang, Jiyang Liu
Summary: In this study, a novel solid-state electrochemiluminescence (ECL) platform was developed for rapid and ultra-sensitive detection of SARS-CoV-2 antibody. The platform utilizes bipolar silica nanochannel array to stably confine the ECL probe and achieve reliable detection of SARS-CoV-2 IgG.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Chemistry, Analytical
Lingya Ning, Yumin Bai, Zixiao Wang, Wenjun Wen, Junping Wang
Summary: A novel and rapid electro-chemiluminescence (ECL) immunosensor was successfully fabricated for ultrasensitive detection of 3-NT. The sensor utilized gold nanoparticles as the luminophore and electropolymerized polyaniline to promote the luminescence of the nanoparticles. It exhibited good analytical performance for 3-NT detection with a wide linear detection range and low detection limit, and had high recovery rate in practical sample applications.
MICROCHEMICAL JOURNAL
(2023)
Article
Chemistry, Analytical
Zhenzhong Zhang, Shaoguo Ru, Jun Wang, Dong Wang, Lingchao Zhao, Hayan Teng, Zhikuang Dai, Wenzhe Zhang, Ailing Yang
Summary: The study successfully developed sensitive electrochemical immunosensors based on Cu2O-BSA nanoparticles for the detection of marine medaka Vtg, demonstrating good sensitivity, selectivity, and reproducibility for Vtg quantification. The immunosensor showed a wide linear range and an extremely low detection limit, making it an easily-operated and ultrasensitive method for detecting weak estrogenic activity.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Mingyang Wang, Zongmei Zheng, Yaru Zhang, Ge Wang, Junchong Liu, Haipeng Yu, Aihua Liu
Summary: In this study, a negative pre-screening strategy was proposed to improve the specificity of selected phage monoclonal antibody clones for VEGF165 biopanning. The developed phage-based EIS immunosensor showed excellent affinity and specificity for VEGF165, and it had a linear range of 0.5-1000 pg/mL with a limit of detection of 0.15 pg/mL. This selective phage-based EIS immunosensor has potential applications in diagnosis and therapy.
ANALYTICA CHIMICA ACTA
(2022)
Article
Biochemistry & Molecular Biology
Chang Tang, Jing-Xian Zhang, Di-Nan Chen, Jia-Wen He, Ai-Jun Wang, Jiu-Ju Feng
Summary: A novel label-free electrochemical immunosensor based on AuPd nanocrystals/N-doped porous carbon was developed for ultrasensitive and high-selective detection of N-terminal pro-B-type natriuretic peptide. The sensor showed a wide dynamic linear range, low limit of detection, and satisfactory results in human serum sample detection.
BIOELECTROCHEMISTRY
(2022)
Article
Materials Science, Ceramics
I. C. Pinto, R. F. Falci, V. A. G. Rivera, T. Guerineau, S. LaRochelle, Y. Messaddeq
Summary: This paper provides a better understanding of the mechanism of interactions between Ce3+ and Er3+ ions in a tungsten-tellurite glass. Ce4+ and Ce3+ ions were obtained in an Er3+-doped tellurite glass by adding different concentrations of CeO2. Under a 980 nm excitation, a series of interactions between Ce3+<-> Er3+ were observed, leading to a subtle increase in the Er3+ emission intensity in the near-infrared region for 0.1 mol% of CeO2, followed by a decrease in the emission intensity for higher CeO2 concentration without any significant increase in the bandwidth. The visible upconversion emission intensity also decreased with the addition of CeO2. These interactions are achieved through coupling and energy transfer.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Gabriel Toshiaki Tayama, Silvia Helena Santagneli, Marcos de Oliveira Jr, Younes Messaddeq
Summary: In this paper, we synthesized and characterized transparent and photopolymerizable aluminum-phosphate-silicate hybrid materials. We investigated the structural evolution of the hybrid materials with varying silicon concentration using SEM, phase-contrast AFM, and solid-state NMR techniques. The structure of the materials follows the build-up principle using aluminum phosphate species and alkoxysilane chains as building blocks. The photopolymerization mechanism results in structural heterogeneities in the range of 5 nm.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Jeferson A. Dias, Silvia H. Santagneli, Ana C. M. Rodrigues, Naiza V. Boas, Younes Messaddeq
Summary: This paper investigates the effects of crystallization advance on the material structure and electrical properties of lithium-ion Na+ super ionic conductor (NASICON) glass ceramics. The study crystallizes glasses with different compositions and monitors the glass-to-crystal transformation using various techniques. The results show that the addition of scandium improves the stability against crystallization and induces lattice expansion. Crystallization leads to significant structural changes, while the percolation of crystals greatly enhances conductivity. Scandium also reduces the sizes of crystals and promotes larger grain sizes for better conductivity in fully crystallized glass ceramics.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Polymer Science
Gabriel Toshiaki Tayama, Sandra Helena Messaddeq, Silvia Helena Santagneli, Younes Messaddeq
Summary: This study investigated the photopolymerization of aluminum-phosphate-silicate resins obtained from the hybrid sol-gel route for Vat photopolymerization (VPP) process. The critical energy (E (c)) and penetration depth (D (p)) were determined as a function of laser power and MPTMS (silicate) concentration. The kinetics of photopolymerization were explored using steady- and unsteady-state photo-DSC experiments. The experimental results supported the validity of the E (c) proportional to k ( t ) (1/2)/k (p) and D (p) proportional to epsilon relationship for predicting critical energy and penetration values for arbitrary resins.
Article
Nanoscience & Nanotechnology
Victor Fuertes, Nicolas Gregoire, Philippe Labranche, Natalie Hamada, Brice Bellanger, Yannick Ledemi, Sophie LaRochelle, Younes Messaddeq
Summary: Engineering silica optical fibers by nanoparticle doping is a promising technology that allows the introduction of new functionalities and extends their applicable fields. This study demonstrates the possibility of doping optical fibers with tetragonal cubic-shaped and monoclinic rod-shaped YPO4 nanocrystals, in terms of shape, composition, and structure. The findings also open up new avenues to study shape-dependent properties of rare-earth orthophosphate (REPO4) nanostructures in optical fibers, which will have a significant impact in various applications.
ACS APPLIED NANO MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Victor Fuertes, Adolfo del Campo, Nicolas Gregoire, Philippe Labranche, Jose Francisco Fernandez, Younes Messaddeq
Summary: An in-depth study of nanoparticle-doped optical fibers using confocal Raman microscopy, Rayleigh light-scattering microscopy, and scanning electron microscopy (SEM) reveals the crystallization structures and size-dependent Raman shifts of YPO4 nanocrystals in the fiber core. The study also evaluates the Raman properties of the nanocrystals at different temperatures, observing linear phonon softening behavior. These findings provide new insights into the characteristics of nanoparticle-doped optical fibers and open up possibilities for further research in this field.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Electrical & Electronic
Magali Ozon, Antoine Frasie, Gabriel Gagnon-Turcotte, Mourad Roudjane, Laurent Bouyer, Ghyslain Gagnon, Younes Messaddeq, Benoit Gosselin
Summary: This work presents a system for measuring and analyzing motion using a portable electronic device and a flexible fiber sensor. The system includes a new sensor interface circuit that measures the impedance of the fiber, which is composed of multi-walled carbon nanotubes and polydimethylsiloxane elastomer. The measured data is transmitted to a laptop via Bluetooth, allowing for easy integration into a smart garment. The system was assessed on a robotic arm and through various exercises on 5 participants, showing good measurement performance and accuracy.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2023)
Article
Chemistry, Physical
Brice Bellanger, Wagner Correr, Emmanuel Veron, Cecile Genevois, Yannick Ledemi, Mathieu Allix, Younes Messaddeq
Summary: The influence of the structural environment of lanthanide ions on the co-doping Faraday effect in fluorophosphate glasses and glass ceramics is studied. The crystallization process and the composition law of TbOF glass ceramics are investigated, and the Verdet constants of co-doped glass ceramics are compared to those of parent glasses. It is found that the structural organization around the lanthanide cation site increases the co-doping influence on the Faraday Effect by optimizing the superexchange interaction.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
V. Fuertes, F. E. Durak, V. A. G. Rivera, N. Gregorie, S. Morency, M. Sharma, L. Wang, Y. Messaddeq, S. LaRochelle
Summary: By adjusting the glass composition, preform, and fiber fabrication conditions, the number density of bismuth active centers (BACs) in the E and S bands can be significantly tailored and increased, resulting in enhanced luminescence and gain.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Ceramics
Victor Fuertes, Nicolas Gregoire, Philippe Labranche, Steohane Gagnon, V. A. G. Rivera, Sophie LaRochelle, Younes Messaddeq
Summary: Rayleigh scattering enhanced nanoparticle-doped silica-based optical fibers have gained attention for distributed sensing applications. Adding in situ growth Ba-rich nanoparticles to alkaline earth-based compositions allows customization of nucleated nanoparticles in the preform core. The fiber drawing process further impacts their size and composition, resulting in optimized trade-off between Rayleigh scattering enhancement and optical losses, enabling sensing lengths from 6.5 to 28.7 m. The ability to easily tailor Ba-rich nanoparticle characteristics strengthens the potential of in situ grown alkaline earth nanoparticles for future distributed optical fiber sensors.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Energy & Fuels
Marivone Gusatti, Daniel A. R. Souza, Sidney J. L. Ribeiro, Marcelo Nalin
Summary: In this study, a novel all-solid-state electrochromic device (ECD) was prepared using a cost-effective and industrially applicable spray coating technique, eliminating the use of indium tin oxide (ITO), tungsten(VI) oxide (WO3), and Li+ or any other liquid/gel electrolytes. The fabricated ECD demonstrated a reversible color change between a light-blue (off) and darkblue (on) state, with good and homogeneous contrast. The device exhibited a coloration efficiency of 174.62 cm2/C and cycle stability for at least 150 times.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Multidisciplinary Sciences
V. Fuertes, N. Gregoire, P. Labranche, S. Gagnon, S. LaRochelle, Y. Messaddeq
Summary: Rayleigh scattering enhanced nanoparticle-doped optical fibers, although restricted in composition and experimental conditions, show potential for distributed sensing applications. In this study, YPO4 nanocrystals are used to develop tunable optical fibers with enhanced scattering and optical performance. The fiber drawing process plays a crucial role in determining the nanocrystal features, and fibers drawn below 1950°C exhibit homogeneous characteristics and performance. The fabricated fibers demonstrate tunable backscattering and optical losses, enabling sensing lengths from 0.3 m to over 58 m. This work suggests a promising future for YPO4 nanocrystals in distributed sensing and opens the door to the incorporation of other REPO4 nanocrystals.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Multidisciplinary
Antsar R. Hlil, Jean-Sebastien Boisvert, Hatem M. Titi, Yalina Garcia-Puente, Wagner Correr, Sebastien Loranger, Jyothis Thomas, Ali Riaz, Younes Messaddeq, Raman Kashyap
Summary: This study thoroughly investigated the impact of femtosecond (fs) laser on PDMS-based composites, revealing the influence of photoinitiators on mechanical properties and refractive index change of PDMS. It showed a significant improvement in optical performance levels of PDMS composites, providing guidance for future research in photonics and polymer chemistry.
Article
Chemistry, Multidisciplinary
Rafaela Silva Lamarca, Joao Pedro Silva, Joao Paulo Varoni dos Santos, Saidy Cristina Ayala-Duran, Paulo Clairmont Feitosa de Lima Gomes
Summary: The demand for portable and low-cost analytical devices has led to the development of 3D-printed fluorometers/photometers. This modular device, made from 3D-printed plastic parts, allows for the determination of caffeine, ciprofloxacin, and iron(ii) in pharmaceutical samples. The device is flexible and can be easily adapted for different applications by switching the position of the photodetector.
Article
Chemistry, Multidisciplinary
Antsar R. Hlil, Jean-Sebastien Boisvert, Hatem M. Titi, Yalina Garcia-Puente, Wagner Correr, Sebastien Loranger, Jyothis Thomas, Ali Riaz, Younes Messaddeq, Raman Kashyap
Summary: This study characterizes the effect of fs-laser writing on various PDMS-based composites, demonstrating the influence of photoinitiators on the mechanical and optical properties of PDMS. The findings provide insights for selecting photoinitiators for specific applications in photonics and polymer chemistry.