Article
Materials Science, Paper & Wood
Weixiang Chen, Bo Chen, Rixin Lv, Milian Wu, Jie Zhou, Beili Lu, Biao Huang, Qilin Lu, Lirong Tang
Summary: CNCs show excellent linearity, high sensitivity, and long-term stability in humidity sensors, making them suitable for high-performance and low-cost sensor design.
Article
Chemistry, Analytical
Dandi Zhou, Zhanjia Kang, Xiaohua Liu, Weiyu Yan, Haolin Cai, Jiaqiang Xu, Dongzhi Zhang
Summary: This paper presents a Quartz crystal microbalance (QCM) ammonia sensor based on ZnO nanoflowers (NFs) doped with cellulose acetate nanofiber (CA) nanofibers and polyaniline-modified nanocomposites (CA/PANI/ZnO). The experimental results show that the QCM sensor based on CA/PANI/ZnO composite nanomaterials exhibits good performances over a wide range of ammonia concentrations (1-70 ppm) at room temperature, including high sensitivity, short response recovery time, high linearity, and high selectivity.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Dongzhi Zhang, Zhanjia Kang, Xiaohua Liu, Jingyu Guo, Yan Yang
Summary: This paper presents a QCM ammonia gas sensor based on PSS-doped ZIF-8-derived porous carbon and polyaniline decorated nanocomposite (PSS/ZIF-C/PANI). The sensor exhibits high sensitivity, excellent linearity, and strong response/recovery capability towards ammonia. Impedance analysis confirms the electrical parameters and quality factor of the QCM, and suggests a potential ammonia adsorption mechanism related to the synergistic effect of the composite nanomaterials.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Polymer Science
Nisha Hollingsworth, Ronald G. Larson
Summary: This study investigates the swelling/deswelling and hysteresis behavior of weakly ionizable polyanion poly(acrylic acid) (PAA) brushes and bilayers containing PAA and poly(ethylene imine) (PEI) using a quartz crystal microbalance with dissipation (QCM-D) system. The results demonstrate that the brush height is influenced by grafting density, chain length, ion charge distribution, and pH value, leading to hysteresis phenomena under different conditions. The findings highlight the complex thermodynamics and kinetics of polyelectrolyte films, even at the monolayer and bilayer level.
Article
Engineering, Multidisciplinary
Andrzej Biadasz, Michal Kotkowiak, Damian Lukawski, Jakub Jadwi zak, Karol Rytel, Kamil K. Edzierski
Summary: In this study, a comprehensive gas transmission system was developed by combining elements from two commonly used systems, which allowed for automatic humidity changes and reliable gas flows in closed measurement chambers. The system demonstrated excellent stability and high precision, making it suitable for thorough investigation of humidity sensor properties.
Article
Chemistry, Analytical
Wei Pan, Xianhe Huang, Qiao Chen
Summary: This study theoretically analyzes the impact of different sizes of dot ring and dot double-ring electrodes on the mass sensitivity distribution of the quartz crystal microbalance (QCM), and proposes a dot triple-ring electrode to enhance uniformity. The research provides a new direction for improving the uniformization of QCM mass sensitivity distribution.
ANALYTICAL CHEMISTRY
(2021)
Article
Optics
Mirit Hen, Leroy Dokhanian, Etai Grunwald, Matan Slook, Moshe Katzman, Maayan Priel, Olga Girshevitz, Avi Zadok
Summary: In this work, the analysis of elastic properties of thin layers deposited on surface acoustic wave-photonic devices is proposed and demonstrated. By measuring the changes in the group velocity of surface acoustic waves after deposition of thin layers, estimates for Young's modulus of these layers can be obtained.
Article
Chemistry, Physical
Dongzhi Zhang, Xiaoshuang Song, Zhao Wang, Haonan Chen
Summary: This study presents a solution for high-performance humidity sensors by coating PDA-GO nanocomposite films on quartz crystal microbalances. The sensors exhibit best dynamic response with specific ratio and spray amount, fast response/recovery time, stable repeatability, and excellent stability, showing potential in various applications.
APPLIED SURFACE SCIENCE
(2021)
Article
Engineering, Electrical & Electronic
Luyu Wang, Jia Song, Yuhang Wu, Chunyang Yu
Summary: Developing a long-term stable gaseous formaldehyde (HCHO) sensor is urgent. The modified Titanium dioxide (TiO2) nanorods on the Quartz Crystal Microbalance (QCM) sensing platform demonstrate excellent HCHO detection capabilities with a low detection limit of 50 ppb at normal temperature. The sensor also exhibits short response and recovery times of 10 s and 13 s, respectively, and satisfactory selectivity and short-term repeatability. Furthermore, the molecular formula of hydrate HCHO (HCHO•βH2O) in real air containing humidity is elucidated as HCHO•2.03-2.35H2O within a relative humidity range of 50-90%.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Chemistry, Physical
Alexey Zhokh, Tamila Serebrii, Peter Strizhak
Summary: The adsorption-desorption of n-hexane, cyclohexane, and benzene on multiwall carbon nanotubes was investigated using the quartz crystal microbalance technique. The desorption kinetics was found to be diffusion-controlled, and the surface diffusion coefficient increases with surface loading.
CHEMICAL PHYSICS LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Jieun Son, Seulki Ji, Sungho Kim, Soyoung Kim, Seong K. Kim, Wooseok Song, Sun Sook Lee, Jongsun Lim, Ki-Seok An, Sung Myung
Summary: A highly facile method utilizing microcolumns integrated on a QCM gas-responsive system with enhanced chemical selectivity was reported for sensing and identifying volatile organic compound single gases. The addition of microcolumns on the QCM electrode increased the ability to accurately analyze frequency shifts upon sensing various single gas molecules. The system exhibited high detection response values above 50 ng/cm(2) for gases, with the microcolumn-equipped sensor showing improved gas identification ability based on distinct diverging behavior of time constants upon detection of different gases.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Analytical
Zhanjia Kang, Dongzhi Zhang, Tingting Li, Xiaohua Liu, Xiaoshuang Song
Summary: This paper presents a quartz crystal microbalance sensor based on SnO2 NFs/PDA composite with high sensitivity and selectivity to formaldehyde gas. The sensor exhibited excellent sensing characteristics over a wide range of formaldehyde concentration, including high sensitivity, short response/recovery times, and high linearity. The adsorption mechanism of formaldehyde gas was attributed to hydrogen bonding and aldehyde ammonia Schiff base interactions.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Di Jiang, Xiaona Zhao, Yi-Nan Liu, Hai-Bo Chen, Wen-Li Lv, Chen Qian, Xian-Wei Liu
Summary: The study introduces a label-free optical imaging technology that can detect molecule binding kinetics by tracking charge-sensitive variations in the oscillation amplitude with sub-nanometer precision, allowing for the measurement of small molecules and metal ions binding to the surface as well as protein-protein binding kinetics. This capability offers a promising platform for screening small-molecule drugs, probing conformational changes in proteins, and detecting environmental pollutants.
ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Analytical
Philipp Ortner, Maren Umlandt, Nino Lomadze, Svetlana Santer, Marek Bekir
Summary: The quartz crystal microbalance with dissipation (QCM-D) has been widely used for investigating the external stimuli responsiveness at solid-liquid interfaces. However, in light responsive adsorption investigation, the quartz crystal itself reacts to optical stimulation, which poses challenges in data interpretation. This article introduces a simple guideline for correcting the measurement artifacts and minimizing the impact of light induced detuning (LID).
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Minoru Yoshimoto, Shigeru Kurosawa, Mutsuo Tanaka
Summary: The study found that under different temperatures and oscillation frequencies, the nanoscale dynamics of soft materials can be described linearly by the relationship between resonant length or molecular weight and the logarithm of QCM angular frequency, and converged to a single point independently of temperature within a certain temperature range.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Chemistry, Applied
Mohamad M. Ayad, Nagy L. Torad, Ahmed Abu El-Nasr, Wael A. Amer
Summary: A scalable route to encapsulate Pt and Ag nanoparticles homogeneously inside amine-functionalized KIT-6 mesochannels was demonstrated as heterogeneous mesoporous catalysts. The catalysts with small-sized NPs of approximately 6.0 and 3.0 nm showed high catalytic efficiency and good reusability. Various reaction parameters were studied to understand the catalytic performance of the mesoporous catalysts.
JOURNAL OF POROUS MATERIALS
(2021)
Article
Polymer Science
Islam M. Minisy, Nehal A. Salahuddin, Mohamad M. Ayad
Summary: Chitosan/polyaniline nanofibers were successfully prepared and loaded with ketoprofen. The drug release kinetics were studied using various models, showing that the drug release mechanism follows anomalous non-Fickian diffusion.
Article
Spectroscopy
Heba M. Ahmed, Mohsen Ghali, Waheed Zahra, Mohamad M. Ayad
Summary: In this study, a CQDs/PANI nanocomposite was successfully prepared and used for the detection of picric acid with good enhancement and sensitivity. The detection mechanism of picric acid was studied, showing electrostatic interaction between picric acid and the nanocomposite through fluorescence resonance energy transfer.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Chemistry, Physical
Wael A. Amer, Ahmed F. Rehab, Mona E. Abdelghafar, Nagy L. Torad, Ahmed S. Atlam, Mohamad M. Ayad
Summary: Carbon quantum dots (CQDs) were synthesized using a green and economical hydrothermal method, and their optical and structural properties were studied. The sensing properties of CQDs, particularly towards volatile formaldehyde, were investigated, showing high sensitivity and potential for formaldehyde vapor detection.
Article
Materials Science, Multidisciplinary
Nagy L. Torad, Islam M. Minisy, Hadir M. Sharaf, Jaroslav Stejskal, Yusuke Yamauchi, Mohamad M. Ayad
Summary: The study utilized a QCM sensor coated with PPy/PVP nanorods/nanotubes film to detect alcohol vapors, showing linear correlation between frequency changes and alcohol concentrations. The sensor exhibited fast response and good sensitivity towards ethanol, 1-propanol, and 1-butanol, potentially due to hydrogen bonding interactions with PPy chains.
Article
Chemistry, Physical
Miharu Eguchi, Muxina Konarova, Nagy L. Torad, Te-An Chang, Dun-Yen Kang, Joe Shapter, Yusuke Yamauchi
Summary: The gas barrier film, made from water and layered aluminosilicates, exhibits moderate permeance due to capillary flow and high adhesion. It is particularly effective in preserving fresh produce with low respiration rates, blocking oxygen transfer and microorganisms, and preventing gas leakage by tightly adhering to the produce surface.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Article
Multidisciplinary Sciences
S. Aboulhadeed, M. Ghali, M. M. Ayad
Summary: This article introduces a homojunction p-n diode device based solely on PEDOT:PSS thin films, which exhibits nonlinear I-V behavior.
SCIENTIFIC REPORTS
(2022)
Article
Environmental Sciences
Mohamad M. Ayad, Mona E. Abdelghafar, Nagy L. Torad, Yusuke Yamauchi, Wael A. Amer
Summary: A method for the eco-friendly preparation of carbon quantum dots (CQDs) using hydrothermal treatment of laurel leaves is demonstrated. The optical and structural characteristics of the prepared CQDs are investigated. A quartz crystal microbalance (QCM) sensor modified with CQDs is capable of detecting formaldehyde vapors, and the sensing properties are investigated. The detection of formaldehyde in the presence of humidity and the adsorption kinetics of various VOCs vapors are discussed.
Article
Engineering, Environmental
Silvia Chowdhury, Nagy L. Torad, Aditya Ashok, Gilang Gumilar, Watcharop Chaikittisilp, Ruijing Xin, Ping Cheng, Md Ikram Ul Hoque, Md Abdul Wahab, Mohammad Rezaul Karim, Brian Yuliarto, Md Shahriar Hossain, Yusuke Yamauchi, Yusuf Valentino Kaneti
Summary: This work presents a template- and etching-free approach to fabricate hollow bimetallic nickel-cobalt benzenetricarboxylic acid hexagonal nanoplates. These nanoplates exhibit high sensitivity and stability in the sensing of ammonia, and have faster adsorption rates compared to other nano materials. The hollow two-dimensional structure and bimetallic composition present in these nanoplates contribute to their excellent sensing performance.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Nagy L. Torad, Yuta Tsuji, Azhar Alowasheeir, Masako Momotake, Kazuki Okazawa, Kazunari Yoshizawa, Michio Matsumoto, Masafumi Yamato, Yusuke Yamauchi, Miharu Eguchi
Summary: To increase chemical reaction rates, general solutions include increasing the concentration/temperature and introducing catalysts. In this study, the rate constant of an electrophilic metal coordination reaction is accelerated 23-fold on the surface of layered aluminosilicate (LAS), where the reaction substrate (ligand molecule) induces dielectric polarization owing to the polar and anionic surface. This unique method to accelerate the chemical reaction is expected to expand the range of utilization of LASs, which are chemically inert, abundant, and environmentally friendly. The concept is also applicable to other metal oxides which have polar surfaces, which will be useful for various chemical reactions in the future.
Article
Chemistry, Physical
Mohammed G. Kotp, Nagy L. Torad, Johann Luder, Ahmed A. M. El-Amir, Watcharop Chaikittisilp, Yusuke Yamauchi, Ahmed F. M. EL-Mahdy
Summary: In this study, two novel phenazine-based CMPs, TPT-QP CMPs and Py-QP CMPs, were successfully synthesized through the Suzuki coupling condensation reaction. These CMPs have high surface areas and good thermal stabilities. TPT-QP CMPs, in particular, have abundant hydrogen-bonding sites and demonstrate high sensitivity and selectivity in detecting sub-ppm levels of volatile acidic hydrocarbons. Additionally, a quartz crystal microbalance (QCM) sensor based on TPT-QP CMPs was fabricated for the first time, showing excellent performance in detecting trace amounts of formaldehyde.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Chemistry, Physical
Mohammed G. Kotp, Nagy L. Torad, Hiroki Nara, Watcharop Chaikittisilp, Jungmok You, Yusuke Yamauchi, Ahmed F. M. EL-Mahdy, Shiao-Wei Kuo
Summary: In this study, we report the rational syntheses of three conjugated microporous polymers (CMPs) with different thiophene contents, topologies, and molecular structures. These CMPs show spherical morphologies, tunable pore volumes, and high thermal and chemical stabilities. Among them, the TPP-ThZ CMP exhibits the highest adsorption capacity for Cr(VI), surpassing other recently reported adsorbents.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Materials Science, Multidisciplinary
Esraa S. Elmorsy, Wael A. Amer, Ayman Mahrous, Mohamad M. Ayad
Summary: A novel and stable composite material was successfully synthesized and its structural and morphological properties were investigated. The composite exhibited higher light absorption and charge separation capabilities under visible light irradiation, resulting in significant photocatalytic degradation of methylene blue. The composite also maintained its activity after multiple cycles.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2023)
Article
Engineering, Environmental
Nagy L. Torad, Ramon Kanai, Kohei Ishikawa, Ryuichi Kamimura, Tohru Kawamoto, Hisashi Tanaka
Summary: This study presents a new monitoring method for the rapid assessment and quantification of low levels of radioactive cesium in Fukushima seawater. The method utilizes Prussian blue analogue nanoparticle slurries to achieve high recovery of cesium in the presence of competing ions.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Qian Wu, Li Tian, Xiangyu Shan, Huiling Li, Chao Li, Juan Lu
Summary: A novel ECL sensor was developed by modifying Fe3CuO4-Ru(bpy)3+ and GO-CdS@ZnS on the electrode for the detection of permethrin. The sensor exhibited high sensitivity and a wide detection range.
Article
Chemistry, Analytical
Tingting Gong, Lei Liao, Bingying Jiang, Ruo Yuan, Yun Xiang
Summary: In this study, a fluorescent biosensing system for high sensitivity detection of MT was established using a new Ag+-stabilized DNA triplex probe (Ag+-SDTP) combined with catalytic hairpin assembly (CHA) and CRISPR/Cas12a signal enhancements. The sensing method is able to selectively detect MT from other non-specific molecules and can achieve low level detection of MT in diluted human serums, demonstrating its potential for monitoring disease-specific MT biomarker at trace levels.
Article
Chemistry, Analytical
Estrella Sanz Rodriguez, Kyra Wood, Paul R. Haddad, Brett Paull
Summary: This study presents a simple, rapid, and reliable method for determining boron in aqueous solutions using suppressed ion chromatography coupled to electrospray ionisation-triple quadrupole mass spectrometry. The method achieved a low limit of detection and demonstrated excellent analytical performance.
Article
Chemistry, Analytical
Aline Cournut, Paul Moustiez, Yannick Coffinier, Christine Enjalbal, Claudia Bich
Summary: Alzheimer's disease is a major cause of senile dementia and is characterized by the aggregation of neurofibrillary tangles and amyloid plaques in the brain. The A beta 1-42 peptide is considered the primary cause of neurotoxicity due to its insolubility and subsequent aggregation. A beta 1-42 and A beta 1-40 have been identified as relevant biomarkers for AD diagnosis, and SurfaceAssisted Laser Desorption/Ionization Mass Spectrometry (SALDI-MS) was used to monitor the A beta 1-42/A beta 1-40 ratio without prior sample treatment.
Article
Chemistry, Analytical
Dotse Selali Chormey, Buse Tugba Zaman, Tulay Borahan Kustanto, Sezin Erarpat Bodur, Suleyman Bodur, Elif Ozturk Er, Sezgin Bakirdere
Summary: This review provides an overview of the harmful effects of endocrine disrupting chemicals (EDCs) on human health and introduces the methods for analyzing EDCs. Recent research has focused on using green chemicals, such as deep eutectic solvents (DESs), for microextraction to ensure environmental safety.
Article
Chemistry, Analytical
Yan Zhang, Renfeng Xu, Jingjing Wu, Zhenghong Zhang, Yuhuang Wang, Hongqin Yang, Sheng Zhang
Summary: This study visualized the pore-like structures in prostate cancer cell membranes after treatment with the anticancer drug paclitaxel, demonstrating its mechanism of action related to oxidative damage.
Article
Chemistry, Analytical
Chihong Ma, Qin Zhou, Jinjin Shi, Hua Gao, Di Huang, Huimin Xue, Han Wang, Zhenzhong Zhang, Sen Yang, Junli Zhang, Kaixiang Zhang
Summary: We developed a CRISPR-empowered electrochemical biosensor, named PER-E-CRISPR, for amplification-free and sensitive detection of miR-21. The biosensor combines the advantages of CRISPR/Cas13a and primer exchange reaction (PER) for target amplification. Under optimized conditions, the PER-E-CRISPR assay exhibits a linear range from 10-13 to 10-7 M and a limit of detection of 30.2 fM. The biosensor shows excellent performance in actual plasma, indicating promising prospects for miRNA detection in molecular diagnosis.
Article
Chemistry, Analytical
Gang Liang, Jie Zhao, Yufei Gao, Tao Xie, Jianhui Zhen, Ligang Pan, Wenwen Gong
Summary: Molecular docking (MD) analysis is widely used for studying the interaction between aptamers and small molecules. This study established steady-state aptamers of tertiary structures (SATS) using specific aptamers of tetracycline antibiotics as docking models. Molecular docking results revealed multiple binding sites in the SATS of aptamers, with significant variations in binding free energy (BFE) and docking score (DS). The study also proposed a method for MD analysis based on SATS, providing insights into binding mode and predicting binding sites.
Article
Chemistry, Analytical
Yixuan Xu, Changchang Teng, Huiping Dang, Dalong Yin, Lifeng Yan
Summary: Stable organic radical molecules with high NIR fluorescence quantum efficiency have been synthesized and encapsulated into nanoparticles, which show great potential for both photodynamic therapy (PDT) and photothermal therapy (PTT) of tumors.
Article
Chemistry, Analytical
Yu Su, Dandan Yang, Yanjie Wang, Jie Ding, Lan Ding, Daqian Song
Summary: In this study, a highly selective molecularly imprinted polymer Cu-MIPs@CS was designed and synthesized for bisphenol A (BPA). Cu-MIPs@CS showed significantly enhanced imprinting factor and selective factor towards BPA compared to MIPs@CS. It also exhibited superior discrimination ability between BPA and its structural analogue. Additionally, Cu-MIPs@CS were successfully applied as a solid phase extraction adsorbent for the determination of BPA in drinking water samples.
Article
Chemistry, Analytical
Yi Qiao, Qiongdan Zhang, Yukun He, Tianguang Cheng, Jing Tu
Summary: Single cell heterogeneity plays an important role in many biological phenomena, and distinguishing cells with specific mutations is beneficial for clinical diagnosis and drug screening. This study introduces a gel plate platform that can distinguish cell types based on their phenotypes, with low equipment requirement. The gel platform has potential in point-of-care circumstances and single-cell stimulation responses that prioritize efficiency and simplicity.
Article
Chemistry, Analytical
Chengke Wang, Shuyang Sun, Ping Wang, Huawei Zhao, Wenling Li
Summary: The food safety of aquatic products is a global concern. Nanotechnology-based analyses have advantages in the detection of bacteria, metal ions, and small molecule contaminants. This review summarizes the recent advances in biosensing strategies for aquatic products and highlights the application of nanomaterials, lateral flow-based biosensors, surface-enhanced Raman scattering, microfluidic chips, and molecular imprinting technologies.
Article
Chemistry, Analytical
Liping Zhu, Zeng Tang, Xuemei Zhang, Li Zhu, Tian Meng, Linying Yu, Ting Xiao, Shasha Lu, Xiaoli Xiong, Xiurong Yang
Summary: A sensitive off-on electrochemiluminescence DNA sensor was developed using Exo III-assisted cascade amplification system. The sensor achieved high selectivity and ultra-high sensitivity in detecting target DNA by utilizing ECL and SPR effects. This study provides a new perspective for designing highly sensitive and programmable ECL biosensors.
Article
Chemistry, Analytical
Tong Li, Mengxu Sun, Suping Xia, Ting Huang, Rong-Tian Li, Chunrong Li, Zong Dai, Jin-Xiang Chen, Jun Chen, Nuan Jia
Summary: Here, we developed a binary system based on DNA tetrahedron and fluorogenic RNA aptamers for highly specific and label-free mRNA imaging in living cells. This system achieved high specificity label-free detection of nucleic acids with a detection limit of 1.34 nM. The method has potential applications in early disease diagnosis and new drug development.
Article
Chemistry, Analytical
Yao Zhao, Shu Zhang, Wang Yao, Yuxuan Zhu, Jing Qian, Juan Yang, Nianjun Yang
Summary: A new hierarchical nanostructured composite with high conductivity and catalytic activity is synthesized. The sensor exhibits significant catalytic effect and high sensitivity for monitoring the environmental endocrine disruptor bisphenol A (BPA).
