Article
Chemistry, Physical
Mateus G. Masteghin, Ranilson A. Silva, David C. Cox, Denis R. M. Godoi, S. Ravi P. Silva, Marcelo O. Orlandi
Summary: Semiconducting metal oxides (SMOs) used in gas sensors are affected by factors such as film thickness, grain size, and grain-grain junctions in the active device volume, complicating analysis and optimization of sensor response. Nanostructured devices with a single element offer a platform to understand the correlation between surface stoichiometry and sensor response. In this study, nanofabricated devices containing SnO2 and Sn3O4 nanobelts of different thicknesses were used to estimate their response to NO2 exposure, revealing differences in Debye length and sensor signals based on surface properties.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Analytical
Jun Min Suh, Tae Hyung Lee, Kootak Hong, Young Geun Song, Sung Hwan Cho, Chong-Yun Kang, Young-Seok Shim, Donghwa Lee, Ki Chang Kwon, Ho Won Jang
Summary: The heterostructure between two-dimensional metal sulfides and metal oxides is an effective strategy to enhance the gas sensing performance. This study focuses on enhancing gas sensing response under highly humid conditions by using 2D tin sulfides-SnO2 heterostructures in the form of vertically aligned 1D nanostructures. The results show superior gas response and recovery to NO2 under high humidity, as well as diverse selectivity towards various gases using noble metal catalyst decoration.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Myung Sik Choi, Han Gil Na, Jae Hoon Bang, Ali Mirzaei, Seungmin Han, Ha Young Lee, Sang Sub Kim, Hyoun Woo Kim, Changhyun Jin
Summary: Gas sensors were fabricated by decorating amorphous carbon layers on SnO2 nanowires, without the need for pretreatment or functionalization, and operated at room temperature. The amorphous carbon increased surface area and improved NO(2) gas sensing by providing electronic effects to the SnO2.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Xiangxiang Chen, Sikai Zhao, Pengfei Zhou, Baoyu Cui, Wenbao Liu, Dezhou Wei, Yanbai Shen
Summary: A room-temperature NO2 gas sensor based on Au-functionalized CuO nanorods was fabricated in this study. By controlling the amount of Au functionalization, the sensitivity and recovery performance can be optimized, showing good selectivity and repeatability. The sensing mechanism of the materials to NO2 was investigated through changes in energy band gap and activation energy with Au functionalization.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Physical
Yinfen Cheng, Zhong Li, Tao Tang, Xuanxing Wang, Xinyi Hu, Kai Xu, Manh Hung Chu, Nguyen Duc Hoa, Huaguang Xie, Hao Yu, Hui Chen, Jian Zhen Ou
Summary: In this study, a three-dimensional nano-porous In2S3 structure self-assembled from 2D components was utilized as a nanoreactor for in-situ covalent functionalization. The functionalized nanoreactor exhibited high-performance gas sensing capabilities, with great reversibility, selectivity, and repeatability. This method provides a facile and efficient strategy for the functionalization of metal sulfides and the preparation of high-performance gas sensors without external stimuli.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Materials Science, Ceramics
Seung-Hyun Lim, Ick-Joon Park, Hyuck-In Kwon
Summary: The effects of rapid thermal annealing (RTA) temperature on the NO2 gas sensing properties of p-type SnOX thin films were investigated. The amount of SnO2 components increased with increasing RTA temperature, but the highest amount of oxygen vacancy (OVac) states was observed in the SnOX thin film annealed at 250 degrees C. The SnOX thin film subjected to RTA at 250 degrees C exhibited significantly higher maximum sensing response to NO2 than those treated at 200 degrees C or 300 degrees C, attributed to the larger amount of SnO2 and OVac in the thin film and the presence of defects and cracks on the film surface.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Analytical
Amit Kumar Shringi, Amit Kumar, Maloy Das, Sang Sub Kim, Hyoun Woo Kim, Mahesh Kumar
Summary: Novel metal functionalization of semiconductor metal oxide surfaces can effectively improve the selectivity and sensitivity of gas sensors. In this study, the functionalization of α-Fe2O3 sensor with silver nanoparticles enhanced its sensing performance for NO2 molecules, resulting in a higher relative response rate.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Physical
Shixiang Zhou, Li Yao, Hui Mei, Konstantinos G. Dassios, Laifei Cheng, Litong Zhang
Summary: Chiral-rotating gas sensing structures composed of chemiresistive-sensitized SiCuOC have been proposed to reduce thermal expansion of gas sensors at high temperatures. The structures disperse thermal stress by heat-induced torsion, maintaining dimensional stability. The synergistic sensitization effect of the substrate and surface sensing layer results in high response/recovery speed and value, with long-term detection maintained. The structures exhibit low thermal expansion coefficient, high deformation resistance, and can perform gas detection under pressure and thermal loading.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Analytical
Licheng Zhou, Zhixiang Hu, Peng Wang, Naibo Gao, Bohui Zhai, Meng Ouyang, Guangzu Zhang, Bingbing Chen, Jingting Luo, Shenglin Jiang, Hua-Yao Li, Huan Liu
Summary: The researchers developed a novel strategy to prepare SnO2 quantum wires with different (110) facets ratio, and integrated them into SAW devices to optimize gas sensor performance. The response of the SAW gas sensor was enhanced with a frequency change of 17 kHz, and the response and recovery times were 45 s and 96 s, respectively. The mass loading effect was found to be the responsible mechanism for the superior NO2 gas sensing performances, and the (110) facet of SnO2 was found to be more beneficial for NO2 adsorption.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Engineering, Electrical & Electronic
S. Kailasa Ganapathi, Manmeet Kaur, Soumen Samanta, Niyanta Datta, Ajay Singh, R. S. Ningthoujam, S. C. Gadkari, A. K. Debnath
Summary: In this study, the surface modification of tin oxide (SnO2) thin films using magnesium phthalocyanine (MgPc) is shown to enhance NO2 sensing response by 100%. The MgPc modified films exhibit higher sensor response, faster response and recovery time, and lower operating temperature compared to pristine SnO2 films. The enhancement is attributed to the formation of p-n hetero junctions and increased oxygen adsorption sites on the sensor surface.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Review
Chemistry, Physical
Zandile Dennis Leve, Emmanuel Iheanyichukwu Iwuoha, Natasha Ross
Summary: This article reviews the functionalization of graphene, synthesis of heterostructured nanohybrids, and the assessment of their collaborative performance towards gas-sensing applications.
Article
Engineering, Electrical & Electronic
Y. H. Navale, S. T. Navale, M. A. Chougule, N. S. Ramgir, V. B. Patil
Summary: This study investigates the selective detection of NO2 gas by CuO/ZnO heterostructured sensors at low temperatures, demonstrating successful detection at 150 degrees Celsius with good response, stability, and reproducibility. The main objective is to understand the interaction between NO2 gas and CuO/ZnO heterostructured sensing materials for the detection of toxic gases.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Shen Ao, Mingda Liu, Dexin Wang, Encheng Zhu, Kai Liu, Weipeng Wang, Yunhan Ling, Wangyang Fu, Zhengjun Zhang
Summary: Graphene's properties make it an ideal material for detecting hazardous gases. However, traditional detection methods have limited selectivity. In this study, we use a lock-in technique to measure both conductance and dielectric modulations in graphene chips, resulting in enhanced selectivity and sensing response compared to conventional methods that rely solely on conductance measurements.
CELL REPORTS PHYSICAL SCIENCE
(2023)
Article
Engineering, Electrical & Electronic
Farshad Khoshnood, Sohrab Manouchehri, Mohammad Hasan Yousefi
Summary: In this work, SnO2 nanostructure layers doped with different weight percentages of Ag were fabricated using spray pyrolysis. The sensing characteristics of these samples to H2S gas were investigated. The results showed that doping with Ag improved the sensing properties of the samples, with the 4 wt.% Ag-doped sample performing the best.
JOURNAL OF ELECTRONIC MATERIALS
(2022)
Article
Biochemistry & Molecular Biology
Monica Terracciano, Simas Rackauskas, Andrea Patrizia Falanga, Sara Martino, Giovanna Chianese, Francesca Greco, Gennaro Piccialli, Guido Viscardi, Luca De Stefano, Giorgia Oliviero, Nicola Borbone, Ilaria Rea
Summary: The physicochemical properties of three different ZnO tetrapodal nanostructures (ZnO-Ts) synthesized by a combustion process were studied and evaluated for label-free biosensing purposes. The chemical reactivity of ZnO-Ts was explored by quantifying the available functional hydroxyl groups (-OH) on the transducer surface necessary for biosensor development. The best ZnO-T sample was chemically modified and bioconjugated with biotin as a model bioprobe, confirming their suitability for biosensing applications through streptavidin target detection experiments.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Materials Science, Multidisciplinary
Muidh Alheshibri, N. M. Shaalan, Q. A. Drmosh, Abbad Al Baroot, Sultan Akhtar, A. Aljaafari, Hassan S. Al Qahtani, Khaled Elsayed
Summary: In this study, nanostructured spinel cobalt oxide with different morphologies were synthesized using pulsed laser ablation in liquid media. The gas sensing properties of the fabricated sensors towards CO gas were investigated, and the results showed that Co3O4 nanosheets/flakes prepared at 70% ethanol exhibited superior sensitivity characteristics.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Physics, Condensed Matter
A. M. A. Shamekh, N. M. Shaalan, T. A. Hanafy, M. Rashad
Summary: The structural features of PVA/MgO nanocomposite films with varying MgO concentrations were investigated using XRD and Raman spectra. XRD spectra showed a decrease in PVA crystallinity with the addition of 1 wt% MgO and an increase with higher MgO concentrations. Raman spectra and the increase in width of localized states Ee suggested the formation of structural disorders and defects at the grain boundaries. The optical properties of the films were evaluated and found to be dependent on MgO wt%, providing guidance for tuning the optical properties of flexible optoelectronic devices.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Chemistry, Analytical
Faheem Ahmed, Ghazzai Almutairi, Prince M. Z. Hasan, Sarish Rehman, Shalendra Kumar, Nagih M. Shaalan, Abdullah Aljaafari, Adil Alshoaibi, Bandar AlOtaibi, Kaffayatullah Khan
Summary: Activated carbon derived from biomass (rice husk) with a certain degree of amorphous carbon structure and spherical morphology was synthesized. The activated carbon showed excellent cyclic reversibility and stability with enhanced electrochemical capacitive performance. This study provides insight into using rice husk for the fabrication of anodes, which could be used for renewable energy storage devices in the future.
Article
Nanoscience & Nanotechnology
Faheem Ahmed, Ahmad Umar, Shalendra Kumar, Nagih Mohammed Shaalan, Nishat Arshi, Mohd Gulfam Alam, P. M. Z. Hasan, Shahid M. Ramay, Rizwan Khan, Abdullah Aljaafari, Adil Alshoaibi
Summary: In this study, a highly stable capacitive deionization (CDI) electrode was fabricated using reduced graphene oxide (RGO) as the positive electrode and spherical-like manganese dioxide nanoparticles decorated RGO sheets (MnO2/RGO) as the negative electrode, which selectively captured salt ions from saline solution. The MnO2/RGO electrodes exhibited a large specific capacitance and lower internal resistance, making them suitable for desalination applications. The MnO2/RGO//RGO-based CDI device showed higher salt uptake capacity and average salt adsorption capacity compared to recent electrode materials, indicating its potential for producing portable drinking water from seawater.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2023)
Article
Physics, Applied
Yukana Terasawa, Masaaki Ichiki, Toshio Kikuta, Toru Asahi
Summary: Single crystals of ferroelectric triglycine sulfate doped with glycine analogs serine, threonine, lactic acid, and alaninol were grown via the slow solvent evaporation method. The dopants caused the formation of a multidomain structure in triglycine sulfate, as revealed by the ferroelectric domain structures and polarization-electric field hysteresis loops. The absence of hydrogen bonds due to the side chains and substituents of the dopant molecules resulted in a lack of cooperative phenomena and the absence of a single-domain structure, unlike in the case of alanine in a previous study.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Shalendra Kumar, Faheem Ahmed, Nagih M. M. Shaalan, Nishat Arshi, Saurabh Dalela, Keun Hwa Chae
Summary: Magnetic nanoparticles of NiFe2O4 were successfully synthesized using sol-gel techniques. The nanoparticles were characterized using various techniques, including X-ray diffraction, transmission electron microscopy, dielectric spectroscopy, magnetization measurements, and electrochemical studies. The results showed that the nanoparticles possessed single-phase nature with face-centred cubic crystalline structure. The average particle size was around 10 nm, and they exhibited ferromagnetic behavior. The nanoparticles also showed high dielectric constant and potential for application in supercapacitors.
Article
Chemistry, Physical
Shalendra Kumar, Faheem Ahmed, Nagih M. Shaalan, Nishat Arshi, Saurabh Dalela, Keun H. Chae
Summary: CeXO2 (X: Fe, Mn) nanoparticles were synthesized and characterized for their structural, morphological, magnetic, and electrochemical properties. XRD, FE-TEM, dc magnetization, Raman analysis, and NEXAFS analysis confirmed the successful incorporation of Fe and Mn in CeO2 matrix and the formation of FCC fluorite structure. The Fe-doped CeO2 showed the lowest band gap and enhanced room temperature ferromagnetism. Ce0.95Fe0.05O2 electrode exhibited excellent electrochemical performance for energy storage devices.
Article
Chemistry, Physical
Mohamed Rashad, Saloua Helali, Nagih M. Shaalan, Aishah E. Albalawi, Naifa S. Alatawi, Bassam Al-Faqiri, Mohammed M. Al-Belwi, Abdulrhman M. Alsharari
Summary: This study comprehensively investigates the photocatalytic degradation and adsorption process of Congo red dye on a mixed-phase copper oxide-graphene heterostructure nanocomposite. Laser-induced pristine graphene and graphene doped with different CuO concentrations were used to analyze the effects. Results showed that incorporating copper phases into the graphene led to a shift in Raman spectra, and XRD confirmed the reduction of CuO to Cu2O and Cu phases embedded in the graphene. The findings demonstrate the potential of this compound for photocatalytic degradation of Congo red.
Article
Chemistry, Multidisciplinary
Faheem Ahmed, Shalendra Kumar, Nagih M. Shaalan, Nishat Arshi, Saurabh Dalela, Keun Hwa Chae
Summary: In order to meet the growing demand for efficient and sustainable power sources, it is crucial to develop high-performance energy storage systems that are cost-effective and environmentally friendly. This study combines rice husk-activated carbon (RHAC), known for its abundance and low cost, with MnFe2O4 nanostructures to improve the overall capacitance and energy density of asymmetric supercapacitors (ASCs).
Article
Chemistry, Analytical
Najla Khaled Almulhem, Chawki Awada, Nagih M. Shaalan
Summary: In this study, the enhanced photodegradation of high-concentration phenol red (PR) using fine TiO2 nanocrystals and KBrO3 as an electron acceptor is reported for the first time. The structural analysis confirmed the anatase phase of the TiO2 nanocrystals. The addition of KBrO3 resulted in an important enhancement in the degradation of PR dye. The proposed mechanism suggests that the OH- radicals play a crucial role in increasing the photocatalytic activities, and the addition of KBrO3 prevents e-h recombination and increases the concentration of hydroxyl radicals.
Article
Chemistry, Inorganic & Nuclear
Nagih M. Shaalan, Faheem Ahmed, Shalendra Kumar, Mohamad M. Ahmad, Abdullah F. Al-Naim, D. Hamad
Summary: This paper reports the use of a low-concentration active electrolyte, KBrO3, for supercapacitor applications. The electrochemical processes were conducted using two concentrations of KBrO3, 0.2 M and 0.4 M. Additionally, a novel strategy for doping graphene with KBr during its fabrication process is presented. This chemical doping improves the electrochemical properties of graphene for use as supercapacitors.
Article
Chemistry, Inorganic & Nuclear
Abdullah Aljaafari, Faheem Ahmed, Nagih M. Shaalan, Shalendra Kumar, Abdullah Alsulami
Summary: This work presents the deposition of titanium nitride (TiN) thin film and its application as a diffusion barrier for copper interconnect using the DC sputtering technique. The deposited film was analyzed using XRD, FESEM, and XPS techniques. The TiN film exhibited a face-centered cubic structure and uniform grain dispersion. The TiN film showed high thermal stability, low resistivity, and excellent performance as a diffusion barrier up to 700 degrees C. However, at higher annealing temperatures, the formation of Cu3Si and TiSi2 compounds was observed.
Article
Chemistry, Multidisciplinary
Nagih M. Shaalan, Shalendra Kumar, Faheem Ahmed, Nishat Arshi, Saurabh Dalela, Keun Hwa Chae
Summary: In this study, a new strategy for improving the electrochemical performance of laser-induced graphene (LIG) supercapacitors (SCs) was reported. The LIG was prepared using a CO2 laser system, with polyimide polymer as the source material. The combination of graphene and NiO particles through CO2 laser doping process significantly enhanced the capacitance of LIG. The results showed a multilayered and waved structure of LIG, with NiO fine particles distributed in the graphene layers.
Article
Chemistry, Multidisciplinary
Shalendra Kumar, Faheem Ahmed, Nagih M. Shaalan, Nishat Arshi, Saurabh Dalela, Keun Hwa Chae
Summary: Fe-doped ZnO nanostructures were prepared using microwave irradiation and investigated for their structural, morphological, magnetic, electronic structural, specific surface area and electrochemical properties as supercapacitor electrodes. The nanocrystalline structures possessed a hexagonal wurtzite structure, with rods and nanosheet-like morphology observed. Fe doping increased the saturation magnetization and specific capacitance, with the highest capacitance observed at 3% doping. The Fe-doped ZnO electrode displayed excellent cyclic stability and is suitable for energy storage applications.
Article
Multidisciplinary Sciences
Ahmed Saleh Ahmed, Walaa Ali Hassan, Mohamed Abdel-Moneim Mohamed, Ezzat Abdalla Ahmed, Nagih M. Shaalan, Mostafa Ragab Abukhadra
Summary: In this study, a high-performance nanocomposite based on the composite of a natural stone was successfully fabricated, and its characteristics were investigated. The organically modified black shale showed excellent adsorption activity for radioactive technetium materials, which is significant for protecting human and environmental health.
SCIENTIFIC REPORTS
(2023)
Article
Chemistry, Analytical
Mengmeng Guo, Na Luo, Yueling Bai, Zhenggang Xue, Qingmin Hu, Jiaqiang Xu
Summary: A porous heterostructure WO3-C/In2O3 was designed and prepared for a miniature H2 sensor, which showed higher response value, lower operating temperature, fast response-recovery speed, and low limit of detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Feng Hu, Hui Hu, Yuting Li, Xiaohui Wang, Xiaowen Shi
Summary: Arsenic contamination in water bodies is a significant health risk. This study developed a chitosan-catechol modified electrode for rapid and accurate detection of trace amounts of arsenic. The modified electrode demonstrated good detection capability and resistance to ionic interference, making it suitable for in situ detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Yantao Zhang, Qian Liu, Tao Tian, Chunhua Xu, Pengli Yang, Lianju Ma, Yi Hou, Hui Zhou, Yongjun Gan
Summary: In this study, a lysosome-targeting buffering fluorogenic probe (Lyso-BFP) was designed and synthesized, demonstrating excellent photostability, pH specificity, and responsiveness to lysosomal acidification in living cells. The performance of Lyso-BFP in pH sensing was attributed to the inhibition of the photo-induced electron transfer process. Lyso-BFP allowed for wash-free imaging and long-term real-time monitoring of lysosome pH changes based on its off-on fluorescence behavior and buffer strategy.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Wei Cai, Wenbo Sun, Jiayue Wang, Xiaokui Huo, Xudong Cao, Xiangge Tian, Xiaochi Ma, Lei Feng
Summary: In this study, a near-infrared fluorescent probe HCBG was developed for imaging of alpha-GLC. HCBG exhibited excellent selectivity and sensitivity towards alpha-GLC in complex bio-samples, and showed good cell permeability for in situ real-time imaging. Through the high-throughput screening system established by HCBG, a natural alpha-GLC inhibitor was successfully isolated and identified. This study provides a novel fluorescence visualization tool for discovering and exploring the biological functions of diabetes-related gut microbiota, and a high-throughput screening approach for alpha-GLC inhibitor.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Trey W. Pittman, Xi Zhang, Chamindie Punyadeera, Charles S. Henry
Summary: Heart failure is a growing epidemic and a significant clinical and public health problem. Researchers have developed a portable and affordable diagnostic device for heart failure that can be used at the point-of-care, providing a valid alternative to current diagnostics approaches.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Anders O. Tjell, Barbara Jud, Roland Schaller-Ammann, Torsten Mayr
Summary: An optical hydrogen peroxide sensor based on catalytic degradation and the detection of produced oxygen is presented. The sensor offers higher resolution and better sensitivity at lower H2O2 concentrations. By removing O2 from the sample solution, a more sensitive O2 sensor can be used for measurement. The sensor has been successfully applied in a flow-through cell to measure H2O2 concentration in different flow rates.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Seong Jae Kim, Ji-hun Jeong, Gaabhin Ryu, Yoon Sick Eom, Sanha Kim
Summary: Surface-enhanced Raman spectroscopy (SERS) is a high-sensitivity, label-free detection method with various analytical applications. Researchers have developed a hydrophobic SERS substrate based on engineered carbon nanotube arrays (CNT-SERS) and studied the role of structural design at both micro and nanoscales. The substrate demonstrated controlled self-enrichment capability and enhanced sensitivity, with a significant increase in the SERS signal. The study also proposed a theoretical model and a concentration strategy inspired by plants for analyte deposition on microarrays.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Dan Zhao, Renjun Jiang, Xiaoqiang Liu, Subbiah Alwarappan
Summary: In this study, a novel ternary composite material was constructed by assembling cerium vanadate nanorods on reduced graphene oxide-microcrystalline cellulose nanosheets, and it was used for real-time monitoring of the concentration of superoxide anions in vivo. The ternary composite showed excellent conductivity, large surface area, and abundant active sites, leading to a wider linear range, high sensitivity, low detection limit, and fast response time for superoxide anion detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Tengfei Wang, Liwen Wang, Guang Wu, Dating Tian
Summary: In this study, a covalent organic framework material TaTp-COF with porous and uniform spheres was successfully prepared via hydrothermal reaction, and it was found to significantly enhance the aggregation-induced emission (AIE) of berberine. The unique emission properties of berberine on TaTp-COF were studied and utilized for the sensitive detection of berberine.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Lin Li, Yilei Ding, Lei Xu, Shuoran Chen, Guoliang Dai, Pengju Han, Lixin Lu, Changqing Ye, Yanlin Song
Summary: In this study, a novel TTI based on a ratiometric fluorescent nanosensor is designed, which has the advantages of high accuracy and low cost. Experimental and theoretical investigations confirm its pH responsiveness and demonstrate its good sensitivity and reliability. By monitoring the total volatile basic nitrogen, this TTI can accurately predict food spoilage and can be adaptively modified for different types of food. The TTI based on this nanosensor enables visual monitoring of food quality.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Fangju Chen, Xueting Wang, Wei Chen, Chenwen Shao, Yong Qian
Summary: Lung cancer is the second most common malignant tumor worldwide. Drug resistance in lung cancer leads to treatment failure and recurrence in majority of patients. This study developed a fluorescent prodrug that can be activated in cancer cells to release drugs, and its signal can be tracked by imaging. It shows a unique autophagy-driven ferroptosis effect, indicating its potential for targeting drug-resistant cancer cells.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Weichao Li, Qiming Yuan, Zhangcheng Xia, Xiaoxue Ma, Lifang He, Ling Jin, Xiangfeng Chu, Kui Zhang
Summary: This study developed a high-performance gas sensor for formaldehyde detection by modifying ZnSnO3 with ZnO QDs and SnO2 QDs. The modified sensor showed improved sensing response and lower working temperature. The presence of ZnO QDs formed rich heterojunctions, increased surface area, and provided oxygen deficiency for formaldehyde sensing reaction, thus enhancing the sensor performance. This research provides an alternative method to enhance the sensing properties of MOS by QDs modification.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Joung-Il Moon, Eun Jung Choi, Younju Joung, Jin-Woo Oh, Sang-Woo Joo, Jaebum Choo
Summary: A novel nanoplasmonic substrate was developed for biomedical applications, which showed strong hot spots for detecting biomarkers at low concentrations. The substrate, called AuNPs@M13, was made by immobilizing 60 nm gold nanoparticles onto the surface of an M13 bacteriophage scaffold. It demonstrated higher sensitivity and lower limit of detection compared to commercially available assays.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Ning Li, Ya Zhang, Ying Xu, Xiaofang Liu, Jian Chen, Mei Yang, Changjun Hou, Danqun Huo
Summary: The molecular subtype of breast cancer guides treatment and drug selection. Invasive tests can promote cancer cell metastasis, so the development of high-performance, low-cost diagnostic tools for cancer prognosis is crucial. Liquid biopsy techniques enable noninvasive, real-time, dynamic, multicomponent, quantitative, and long-term observations at the cellular, genetic, and molecular levels. A Cu-Zr metal-organic framework (MOF) nanoenzyme with monatomic Cu attachment has been synthesized and proven to have high catalytic performance. The sensor constructed using this nanoenzyme shows potential for accurate classification of breast cancer serum samples.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Article
Chemistry, Analytical
Jeongmin Kim, Hyemin Kim, Seunghyun Park, Hyeonaug Hong, Yong Jae Kim, Jiyong Lee, Jaeho Kim, Seung-Woo Cho, Wonhyoung Ryu
Summary: This study presents a method to fabricate independently functioning microneedle (MN) electrodes with narrow intervals for high precision electrochemical sensing. The optimized mixture of photocurable polymer and single-wall carbon nanotubes was used to mold single composite MNs, which were then attached to pre-patterned electrodes. Plasma etching and electropolymerization were performed to enhance the electrochemical activity, and Prussian blue and glucose oxidase were electrodeposited on the MNs for glucose detection. The MN electrodes showed good sensitivity and linearity, and the feasibility of glucose detection was demonstrated in an in vivo mouse study.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
