Article
Nanoscience & Nanotechnology
Mostafa Shooshtari, Sten Vollebregt, Yas Vaseghi, Mahshid Rajati, Saeideh Pahlavan
Summary: Detection of hazardous toxic gases for air pollution monitoring and medical diagnosis has been researched. In this paper, a Titanium dioxide (TiO2)-based gas sensor enhanced with gold nanoparticles was fabricated and characterized. The presence of gold nanoparticles on the surface of TiO2 was found to enhance the sensitivity response of gas sensors by up to about 40%. The fabricated gas sensor showed sensitivity to acetone, methanol, and ethanol vapors at room temperature and the recovery time of the gold decorated TiO2 sensor was less than 40 seconds.
Article
Chemistry, Physical
Matawee Punginsang, Dario Zappa, Elisabetta Comini, Anurat Wisitsoraat, Giorgio Sberveglieri, Andrea Ponzoni, Chaikarn Liewhiran
Summary: In this study, sensors based on WO3 nanowires sensing films were fabricated by thermal oxidation method on alumina substrates and functionalized with gold nanoparticles by RF magnetron sputtering. An optimal sputtering time of 10 seconds led to significantly enhanced sensing performances towards H2S, with a detection limit of 0.17 ppb for 5 ppm at 350 degrees C and 50% relative humidity.
APPLIED SURFACE SCIENCE
(2022)
Article
Environmental Sciences
Ajeet Kumar Singh, Rajan Walia, Madan Singh Chauhan, Ravi S. Singh, Vineet Kumar Singh
Summary: Through numerical simulation studies, it was found that interface defects have a significant impact on the performance of heterojunction solar cells, and increasing the bandgap of the absorber layer can improve the performance of the solar cells. Compared to n-TiO2/p-Cu2O heterojunction solar cells, n-TiO2/p-WS2 heterojunction solar cells showed an increase in performance of nearly 182%, and the performance was further enhanced by about 139% with the addition of a p-Cu2O hole transport layer. The best-simulated efficiency of the proposed hetero-structure solar cell was 28.86%.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Green & Sustainable Science & Technology
Gayan W. C. Kumarage, Dario Zappa, Catalina G. G. Mihalcea, Valentin-Adrian Maraloiu, Mariana Stefan, Elisabetta Comini
Summary: This study presents conductometric sensors based on Co3O4 nanowires for hydrogen detection at ppb levels. The nanowires exhibit diameters between 6-50 nm and lengths of 1-5 & mu;m, primarily growing along the (311) direction of spinal Co3O4. Raman investigation reveals characteristic peaks corresponding to symmetric phonon modes of crystalline Co3O4. The sensors show abnormal n-type semiconducting behavior above 300 & DEG;C due to lattice oxygen's involvement in the hydrogen sensing mechanism. Operating at 450 & DEG;C in dry air, the sensor shows a higher response to 100 ppm H-2 compared to other gases and maintains a consistent conductance baseline even under high humidity for 25 days.
ADVANCED ENERGY AND SUSTAINABILITY RESEARCH
(2023)
Article
Engineering, Electrical & Electronic
Senol Kaya, Ugur Soykan, Mustafa Sunkar, Seda Karaboga, Muhsin U. Dogan, Rifki Terzioglu, Gurcan Yildirim, Cabir Terzioglu
Summary: The influences of annealing temperatures on the electrical characteristics of a p-NiO/n-TiO2 heterojunction diode were investigated, with a focus on changes in microstructure, morphology, and surface chemistry of the p-NiO/n-TiO2 films. It was found that the annealing temperature affected the stress variations in the films and the crystallization of the TiO2 layer, leading to the formation of grain structures. The study also revealed that annealing temperature played a significant role in the rectifying behavior, barrier potential, and ideality factor of the diode, with the most favorable results achieved at 400 degrees C.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Lili Jiang, Qi Cui, Ruijia Zhang
Summary: The NiO/ZnSnO3 composite was synthesized using a hydrothermal method and its various properties were characterized. The composite exhibited a large specific surface area due to the tight adherence of bulk ZnSnO3 to the flake-like NiO. The composite showed excellent sensing properties towards n-butanol gas, with a high response and good stability.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Navpreet Kaur, Dario Zappa, Valentin-Adrian Maraloiu, Elisabetta Comini
Summary: Establishing a platform with different nanostructured oxides is a novel idea for developing highly sensitive and selective sensing devices. The study successfully created 3D-heterostructures consisting of 1D nanowires of NiO and WO3, exhibiting selective behavior towards different gases. The improved sensing performance of the heterostructures is attributed to charge carrier transport through specific interfaces and modulation of charge carriers in the electron depletion layer of WO3 and hole accumulation layer of NiO and NiWO4.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Review
Chemistry, Physical
Sanjit Manohar Majhi, Ali Mirzaei, Hyoun Woo Kim, Sang Sub Kim, Tae Whan Kim
Summary: This paper presents a discussion on types of gas sensors and energy-saving strategies, focusing on self-heated gas sensors, MEMS-based gas sensors, and room temperature operated flexible/wearable sensors, as well as their applications in environmental monitoring.
Article
Chemistry, Physical
Tamasgen Fikadu Yadeta, Toyoko Imae
Summary: The carbon quantum dot (C-dot) acts as a photosensitizer and dye-adsorber. Adding C-dot to TiO2/NiO(10 wt%) nanocomposites significantly enhances the power conversion efficiency (PCE) of dye-photosensitized solar cells (DSSCs) up to 2.88 times. However, in TiO2/CuO/C-dot nanocomposites, the addition of C-dot leads to a decrease in PCE.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Junghoon Choi, Benjamin Chacon, Hyunsoo Park, Kanit Hantanasirisakul, Taewoo Kim, Kateryna Shevchuk, Juyun Lee, Hohyung Kang, Soo-Yeon Cho, Jihan Kim, Yury Gogotsi, Seon Joon Kim, Hee-Tae Jung
Summary: The n-p-conductor three-phase transition of gas sensing behavior using Mo2CTx MXene is reported for the first time, with organic intercalants and film thickness playing a critical role. The presence of tetramethylammonium hydroxide (TMAOH) intercalant leads to p-type gas sensing response, while the absence of intercalant results in a clear n-type response. In addition, thicker Mo2CTx films exhibit conductor-type response compared to thinner films.
Article
Materials Science, Ceramics
Yao Ji, Nan Zhang, Juhua Xu, Quan Jin, Xiaoguang San, Xiaolong Wang
Summary: In this study, a new Co3O4/In2O3 flower-like p-n heterostructure sensor was designed and synthesized by a one-step hydrothermal method to enhance the sensitivity towards trimethylamine (TMA) gas. Various characterizations were performed to determine the structure, constituent elements, and valence of the Co3O4/In2O3 sensor. The 5% Co3O4/In2O3 sensor exhibited improved response time, lower operating temperature, outstanding selectivity, excellent sensitivity, ultrahigh repeatability, and long-term stability towards TMA compared to pure In2O3. The construction of p-n heterostructure effectively enhanced the gas-sensitive response, while the catalytic action of Co3O4 reduced the activation energy of the reaction. This study elucidated the mechanism behind heterojunction-enhanced gas-sensing performance and provided a novel strategy for the design of gas-sensitive materials.
CERAMICS INTERNATIONAL
(2023)
Article
Optics
Menghan Jia, Fang Wang, Libin Tang, Jinzhong Xiang, Kar Seng Teng, Shu Ping Lau, Yanfei Lu
Summary: UV photodetectors based on metal oxide heterostructures have gained significant interest due to their excellent performance and ease of fabrication. In this study, a UV photodetector consisting of p-NiO/SiO2/n-ZnO heterostructure was prepared by RF magnetron sputtering method, exhibiting remarkable performances such as high rectification ratio, responsivity, and external quantum efficiency at low power consumption.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Tran Khoa Dang, Nguyen Duc Cuong, Ho Van Minh Hai, Tran Quy Phuong, Le Lam Son, Dang Thi Thanh Nhan, Vo Van Tan, Mai Duy Hien, Ki-Joon Jeon, Nguyen Quang Hung, Luu Anh Tuyen, Nguyen Van Hieu
Summary: In this paper, hierarchical alpha-Fe2O3 hollow microspheres (HFHMs) were fabricated as gas sensors with super-sensitivity and good distinguishing properties. The sensors exhibited high sensitivity towards acetone and ethanol, as well as a fast response time, and the distinguishing abilities of different gas groups were significantly improved using artificial intelligence (AI) tool called Principal Component Analysis (PCA).
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Nanoscience & Nanotechnology
Jiyang Zeng, Qian Rong, Bin Xiao, Baoye Zi, Xinya Kuang, Xiyu Deng, Yiwen Ma, Zhenlin Song, Genlin Zhang, Jin Zhang, Qingju Liu
Summary: A ppb-level TEA gas sensor based on Co3O4/WO3 p-n heterojunction was reported, showing excellent sensing performance and selectivity with linear response to TEA concentration. Experimental results indicated a detection limit of 0.6 ppb, with Co3O4 improving electron separation/transport efficiency and accelerating TEA oxidation rate.
Article
Nanoscience & Nanotechnology
Hassan Algadi, Hasan Albargi, Ahmad Umar, Mohd. Shkir
Summary: A low-cost and high-performance UV photodetector based on anatase titanium dioxide (TiO2) and nitrogen-doped graphene quantum dots (N-GQDs) bilayer heterojunction was fabricated. The hybrid photodetector showed significantly enhanced photoresponsivity compared to the pure TiO2-based photodetector. This improvement was attributed to the energy band alignment between anatase TiO2 and N-GQDs films, leading to higher absorption rate and more efficient transport mechanism in the hybrid junction-based photodetector.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Serhii Volkov, Maros Gregor, Tomas Plecenik, Elena Zhitlukhina, Mikhail Belogolovskii, Andrej Plecenik
Summary: Point-contact Andreev spectroscopy is a powerful technique for obtaining quantitative information on the electronic properties of a superconductor, but measurements often reveal unexpected conductance features that cannot be adequately explained by conventional theory, particularly conductance dips at slightly higher voltage biases than the expected energy gap for a superconductor.
APPLIED NANOSCIENCE
(2022)
Article
Engineering, Electrical & Electronic
Wenjian Zheng, Zhengjun Yao, Xuefei Zhang, Jintang Zhou
Summary: This study successfully prepared two modified carbonyl iron powders and laminated absorption composites using a vacuum-assisted molding process. The results showed that the modified composites had enhanced mechanical properties and larger absorption bandwidth, indicating potential practical applications.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Manufacturing
Mengxin Yao, Zhengjun Yao, Xuewei Tao, Chengjun Huang, Shasha Zhang
Summary: The study demonstrated that a layered structure built via dual-wire electron beam directed energy deposition (EBDED) can effectively reduce the anisotropy of mechanical properties in titanium alloys. The as-built layered structures exhibited quasi-isotropic mechanical properties, providing a new perspective for the exploration of isotropic high-performance titanium alloys by additive manufacturing.
ADDITIVE MANUFACTURING
(2022)
Article
Chemistry, Physical
Bo Wei, Mengqing Wang, Zhengjun Yao, Zhiping Chen, Ping Chen, Xuewei Tao, Yijie Liu, Jintang Zhou
Summary: This study proposes a new strategy to achieve lightweight and high-efficiency microwave absorption by constructing hierarchical special structures. The bimetallic nanoarray composed of nickel/cobalt embedded three-dimensional carbon foam (BNA/3dCF) is synthesized using a hydrothermal process and high-temperature annealing. The BNA/3dCF exhibits excellent absorption performance and impedance matching capability.
Article
Chemistry, Physical
Linling Xu, Jiaqi Tao, Xianfei Zhang, Zhengjun Yao, Ali Zavabeti, Jintang Zhou
Summary: Metal-organic frameworks (MOFs) derivatives have been extensively studied as efficient electromagnetic absorbing materials. A Co@N-doped porous carbon composite with double-shell hollow structures was developed through self-templating polymerization and subsequent pyrolysis, providing a promising approach for designing hollow MOFs derivatives.
Article
Engineering, Environmental
Jun Liu, Jiaqi Tao, Linlin Gao, Xiaoxuan He, Bo Wei, Yansong Gu, Zhengjun Yao, Jintang Zhou
Summary: A synergistic strategy is proposed for controlling the particle size and morphology of SiC/C composites by varying the calcination temperature and pH environment. The obtained hollow mesoporous SiC@C microsphere shows excellent microwave absorption performance.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Zibao Jiao, Wenjun Huyan, Junru Yao, Zhengjun Yao, Jintang Zhou, Peijiang Liu
Summary: A zinc oxide modified carbon fiber structure has been successfully prepared using a low temperature hydrothermal method, which exhibits excellent electromagnetic wave absorption properties. The composites show enhanced absorption performance at low filling and thin thickness, and the absorption bandwidth expands with increasing thickness.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Pavol Durina, Tomas Plecenik, Tomas Roch, Veronika Medvecka, Martin Truchly, Branislav Granc, Anna Zahoranova, Andrej Plecenik
Summary: Self-assembled monolayers of micro- or nanospheres deposited from a colloid on material surfaces can be used to fabricate nanopatterns without costly lithographic equipment. A cost-effective and fast method of fabrication of large-area continuous monolayers of polystyrene (PS) spheres has been demonstrated, and possible applications of this method have been presented.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Nanoscience & Nanotechnology
Elena Zhitlukhina, Magdalena Polackova, Serhii Volkov, Branislav Grancic, Maros Gregor, Tomas Plecenik, Mikhail Belogolovskii, Paul Seidel, Andrej Plecenik
Summary: Manipulating vortex matter in nanometer-thin type-II superconducting layers is important for the performance of superconducting devices. By immobilizing magnetic flux lines through natural or artificially introduced pinning sites, or by using a nanometer-thin ferromagnetic film in close proximity, the transport characteristics can be preserved. Our research focuses on coupled metallic multilayers composed of weak diluted ferromagnetic (NiCu) and superconducting (NbN) films. By measuring current-voltage curves, we observe a strong growth of the critical current in certain configurations, accompanied by moderate changes in the critical temperature or their absence. This effect, known as magnetic pinning, can be enhanced by magnetization engineering to optimize the pinning strength in desired field ranges.
APPLIED NANOSCIENCE
(2022)
Article
Chemistry, Physical
Azhar Ali Haidry, Qawareer Fatima, Zhe Wang, Yucheng Wang, Yinwen Ji, Adil Raza
Summary: Ordered mesoporous TiO2 (OMT) with tunable channels was prepared using a facile soft-template evaporation-induced self-assembly (EISA) method. The effect of phenol-formaldehyde resins (PF) and the ratio of triblock copolymer (F127) and tetrabutyl titanate (TBOT) on the OMT surface was studied. By controlling the ratio of F127 and TBOT, OMT samples with specific surface area SSA ranging from 141-254 m^2/g, average pore size SP ranging from 5.3-9.8 nm, and pore volume VP ranging from 0.29-0.45 cm^3/g were obtained. The OMT with optimum SSA (approximately 220 m^2/g) and small SP (approximately 5.3 nm) exhibited high response, fast response time, and good long-term stability under 95% RH.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Energy & Fuels
Qawareer Fatima, Azhar Ali Haidry, Riaz Hussain, Haiqian Zhang
Summary: In the past decade, perovskite-based solar cells (PSCs) have gained attention worldwide for their high-power conversion efficiency in photovoltaic (PV) research. However, the presence and stability of lead in the perovskite absorber layer has hindered their practical applications. This study utilized numerical simulations to evaluate the performance of oxide/perovskite/oxide-type PSCs, identifying the optimal combination of electron and hole transport layers for the highest PV performance. Additionally, the effects of different layer thicknesses and defects were analyzed in detail, demonstrating the potential of CsSnI3 as an absorber with optimized defects.
Article
Physics, Multidisciplinary
Magdalena Polackova, Elena Zhitlukhina, Mikhail Belogolovskii, Maros Gregor, Tomas Plecenik, Paul Seidel
Summary: The four-point probe is a simple method for measuring thin-layer surface resistance. It can measure resistivity regardless of the resistance of the contacts, which is important for large and non-ohmic contacts. However, the results are dependent on sample geometry and probe position, leading to incorrect conclusions in some cases.
EUROPEAN PHYSICAL JOURNAL PLUS
(2023)
Article
Materials Science, Multidisciplinary
Yin Fen Cheng, Zhong Li, Min Zhang, Hua Guang Xie, Tao Tang, Yi Liang, Xuan Xing Wang, Kai Xu, Bao Yue Zhang, Azhar Ali Haidry, Jian Zhen Ou
Summary: In this study, tailorable 2D SnO nanosheets with thicknesses between 1.5 and 3 nm are prepared by controlling self-limiting oxidation over the liquid Sn surface. The nanosheets exhibit high sensitivity and reversibility for NO2 detection at room temperature.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Muhammad Bilal Hanif, Guru Karthikeyan Thirunavukkarasu, Viktoriia Liapun, Hryhorii Makarov, Maros Gregor, Tomas Roch, Tomas Plecenik, Karol Hensel, Marcel Sihor, Olivier Monfort, Martin Motola
Summary: This study presents an environmentally friendly synthesis of TiO2 nanotube (TNT) layers and demonstrates their photocatalytic performance and HO radical production rate. The best preparation condition was using AgNO3 as the electrolyte, which resulted in TNT layers with suitable morphological features and crystal structure.
Article
Chemistry, Physical
Marcel Sihor, Muhammad Bilal Hanif, Guru Karthikeyan Thirunavukkarasu, Viktoriia Liapun, Miroslava Filip Edelmannova, Tomas Roch, Leonid Satrapinskyy, Tomas Plecenik, Sajid Rauf, Karol Hensel, Olivier Monfort, Martin Motola
Summary: This study demonstrates the facile and scalable fabrication of large-area TiO2 nanostructures via electrochemical anodization, with excellent photocatalytic activity and hydrogen production. The formation of different TiO2 nanostructures with varied morphology and performance at different applied potentials was observed. The highest caffeine photodegradation and hydrogen production rates were achieved using specific TiO2 nanostructures. This work highlights the potential strategy for the synthesis of large-area anodic TiO2 nanostructures for efficient photocatalysis and hydrogen production.
CATALYSIS SCIENCE & TECHNOLOGY
(2022)
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)