Article
Chemistry, Analytical
Shipra Gupta, Bhola N. Pal, Rajiv Prakash
Summary: A highly sensitive, room temperature operating ammonia gas sensor has been fabricated using PBTTT-C14/MoS2-QDs heterojunction based organic thin film transistor. The sensitivity and selectivity of the device has been tested by exposing it to various concentrations of NH3. The response of the polymer/QDs heterojunction device is 3 times higher compared to a reference device in higher concentration range of NH3.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Review
Chemistry, Multidisciplinary
Sanggon Kim, Jacob Brady, Faraj Al-Badani, Sooyoun Yu, Joseph Hart, Sungyong Jung, Thien-Toan Tran, Nosang V. Myung
Summary: This article provides an overview of the application of nanoengineered materials in gas sensing, discussing various strategies for improving gas sensing performance using nanomaterials and highlighting the development directions of optical and electrical sensing modalities.
FRONTIERS IN CHEMISTRY
(2021)
Article
Chemistry, Analytical
Nguyen Van Duy, Nguyen Xuan Thai, Trinh Minh Ngoc, Dang Thi Thanh Le, Chu Manh Hung, Hugo Nguyen, Matteo Tonezzer, Nguyen Van Hieu, Nguyen Duc Hoa
Summary: Classification of different gases is important and can be achieved using gas sensors such as electronic noses. A new design based on bilayer Pt/SnO2 for gas sensor array has been proposed. The study tested the sensors with various gases including ethanol, methanol, isopropanol, acetone, ammonia, and hydrogen for effective classification.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Automation & Control Systems
Zheng Hui, An Lu
Summary: In the soybean market, low-quality soybeans often replace high-quality ones, and the quality of soybeans from different origins varies due to the natural growth environment. This paper proposes a deep learning method to classify the gas information of soybeans from different origins, providing an effective detection method for quality supervision in the soybean market.
CHEMOMETRICS AND INTELLIGENT LABORATORY SYSTEMS
(2023)
Review
Chemistry, Multidisciplinary
Matteo Tonezzer, Dang Thi Thanh Le, Lai Van Duy, Nguyen Duc Hoa, Flavia Gasperi, Nguyen Van Duy, Franco Biasioli
Summary: Metal oxides are ideal for gas sensors due to their sensitivity and simplicity, but they lack selectivity. This review analyzes scientific articles on electronic noses based on metal oxide nanowires, which address the issue of selectivity by using multivariate statistical algorithms. The review covers various applications such as health, agrifood, and security.
NANOTECHNOLOGY REVIEWS
(2022)
Article
Biophysics
Ziyu Gan, Qin'an Zhou, Chengyu Zheng, Jun Wang
Summary: Biotic and abiotic stresses increase the emission of volatile organic compounds (VOCs) from plants. VOCs analysis enables timely diagnosis of plant diseases for sustainable agriculture. Recent advancements in nanomaterials research have contributed to the development of novel VOCs sensors with high sensitivity and selectivity. This review discusses VOCs monitoring technologies for plant diseases diagnosis, emphasizing on custom-made VOCs sensors and addressing challenges for future improvements.
BIOSENSORS & BIOELECTRONICS
(2023)
Review
Chemistry, Multidisciplinary
Lidong Tan, Zhaohui Feng, Hongli Zheng, Zongwei Yao, Xiaohui Weng, Fangrong Wang, Zhiyong Chang
Summary: This paper discusses the challenges of gas detection in enclosed cabins, focusing on the potential and capabilities of electronic nose applications in this field. The electronic nose, as a low-cost, high-precision, and fast detection method, can effectively improve the accuracy and real-time detection of gas in enclosed cabins.
APPLIED SCIENCES-BASEL
(2022)
Review
Chemistry, Analytical
Zhenyi Ye, Yuan Liu, Qiliang Li
Summary: Machine learning methods enable precise odor identification and analysis with the electronic nose (E-Nose) for both qualitative and quantitative purposes. Advanced machine learning techniques are crucial for improving the performance of the E-Nose and enhancing its capabilities in various applications, leading to increased prediction accuracy and stability.
Article
Chemistry, Analytical
Mostafa Shooshtari, Alireza Salehi
Summary: This paper presents a modification to carbon nanotubes (CNTs) to improve the sensitivity to volatile organic compounds (VOCs) and enhance the stability of CNT sensors. By growing titanium dioxide nanowires (TiO2-NW) on the surface of CNTs, the sensors show increased sensitivity and reduced response time. Using virtual arrays of an electronic nose (E-nose), new features are extracted from the data and classified using support vector machine (SVM) algorithms. The paper achieves high accuracy in classifying different VOC gases.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Multidisciplinary
Yingying Jian, Nan Zhang, Taoping Liu, Yujin Zhu, Di Wang, Hao Dong, Lihao Guo, Danyao Qu, Xue Jiang, Tao Du, Youbin Zheng, Miaomiao Yuan, Xuemei Fu, Jinmei Liu, Wei Dou, Fang Niu, Ruizhi Ning, Guangjian Zhang, Jinhai Fan, Hossam Haick, Weiwei Wu
Summary: This study reports on a cost-efficient artificially intelligent chemiresistive sensor array that can noninvasively diagnose bladder cancer at an early stage and maintain postoperative surveillance through smelling clinical urine samples. Clinical trials show that the system achieves very high sensitivity and accuracy in diagnosing both healthy controls and bladder cancer patients.
Article
Engineering, Electrical & Electronic
Wentian Zhang, Taoping Liu, Amber Brown, Maiken Ueland, Shari L. Forbes, Steven Weidong Su
Summary: The whisky market is prone to fraudulent activities, and it is challenging for most consumers to distinguish fraudulent beverages. A new electronic nose prototype called NOS.E has been developed to identify the differences between whiskies based on their odour. This study demonstrates the high accuracy of the proposed e-nose solution in brand name, region, and style classification, which was further validated using GC x GC-TOFMS.
IEEE SENSORS JOURNAL
(2022)
Review
Chemistry, Analytical
Seyed Mohammad Taghi Gharibzahedi, Francisco J. Barba, Jianjun Zhou, Min Wang, Zeynep Altintas
Summary: This study reviews the application of electronic sensing platforms in the assessment of tea quality. Advanced sensing technologies and data processing algorithms can accurately accelerate tea quality assessment and define new standards for tea products. Feature-level fusion strategy can improve the accuracy of prediction models.
Article
Chemistry, Multidisciplinary
Matteo Tonezzer, Cristina Armellini, Laura Toniutti
Summary: Thermal electronic noses are an important type of sensor in modern applications, capable of distinguishing different gases and volatiles. Research shows that thermal electronic noses based on SnO2 nanowires outperform in detection and classification.
Article
Oncology
Alessio Filianoti, Manuela Costantini, Alfredo Maria Bove, Umberto Anceschi, Aldo Brassetti, Mariaconsiglia Ferriero, Riccardo Mastroianni, Leonardo Misuraca, Gabriele Tuderti, Gennaro Ciliberto, Giuseppe Simone
Summary: This study demonstrates the potential of urine volatilome profiling via an electronic nose as a promising non-invasive diagnostic tool for distinguishing prostate cancer patients from healthy controls. The method shows high accuracy and reproducibility, suggesting the possibility of reducing invasive procedures in the future.
Article
Chemistry, Analytical
Jose Enrique Eirez Izquierdo, Marco Roberto Cavallari, Dennis Cabrera Garcia, Jose Diogo da Silva Oliveira, Vinicius Augusto Machado Nogueira, Guilherme de Souza Braga, Oswaldo Hideo Ando Junior, Alain A. Quivy, Ioannis Kymissis, Fernando Josepetti Fonseca
Summary: Detecting volatile organic compounds is crucial in water quality analysis. A cheaper and faster alternative to gas-phase chromatography is using an electronic nose from organic thin-film transistors. In this work, the researchers successfully demonstrated the sensitivity of a PBTTT-C14 transistor on cross-linked PVP to isoborneol.
Article
Chemistry, Multidisciplinary
Trisha R. Nickerson, Emma N. Antonio, Dylan P. McNally, Michael F. Toney, Chunmei Ban, Anthony P. Straub
Summary: Polyamide reverse osmosis (PA-RO) membranes have high water permeability and salt rejection, making them important for addressing water shortages. However, current membranes face challenges with selectivity, fouling, and predicting performance. This Perspective highlights the need for molecular understanding of selectivity and transport mechanisms of PA-RO and other polymer membranes to guide future developments and improve predictive models. It discusses current understanding of ion, water, and polymer interactions in PA-RO membranes, explores their impact on transport properties, and underscores advances in characterization techniques and computational methods for studying transport phenomena.
Article
Polymer Science
Grant E. Bauman, Jonathan D. Hoang, Michael F. Toney, Timothy J. White
Summary: The anisotropy of liquid crystalline elastomers (LCEs) is derived from the interaction-facilitated orientation of the molecular constituents. In this study, we investigated the correlation between the thermomechanical response of LCEs subjected to mechanical alignment and measurements of the Hermans orientation parameter. By systematically preparing LCEs with varying concentrations of liquid crystalline mesogens, we were able to control the degree of achievable order. The results showed that the liquid crystalline content defines the temperature of actuation, while the orientation parameter of the LCE is intricately correlated to both the total actuation strain and the rate of thermomechanical response.
Review
Chemistry, Multidisciplinary
Rodrigo Szostak, Agnaldo de Souza Goncalves, Jilian Nei de Freitas, Paulo E. Marchezi, Francineide Lopes de Araujo, Helio Cesar Nogueira Tolentino, Michael F. Toney, Francisco das Chagas Marques, Ana Flavia Nogueira
Summary: The performance and stability of metal halide perovskite solar cells depend on precursor materials and deposition methods. In situ studies have contributed to the development of procedures to improve the properties of perovskite films and explore device performance and degradation. These studies highlight the importance of in situ and operando studies for achieving the stability required for commercial deployment.
Review
Chemistry, Multidisciplinary
Hao A. Nguyen, Grant Dixon, Florence Y. Dou, Shaun Gallagher, Stephen Gibbs, Dylan M. Ladd, Emanuele Marino, Justin C. Ondry, James P. Shanahan, Eugenia S. Vasileiadou, Stephen Barlow, Daniel R. Gamelin, David S. Ginger, David M. Jonas, Mercouri G. Kanatzidis, Seth R. Marder, Daniel Morton, Christopher B. Murray, Jonathan S. Owen, Dmitri V. Talapin, Michael F. Toney, Brandi M. Cossairt
Summary: In this review, the demand and design rules for solution-processed semiconductors with narrow photoluminescence line widths are discussed. The current state of emission line width for various colloidal materials is compared, and some conclusions and prospects are summarized.
Article
Chemistry, Physical
Lucas Q. Flagg, Jonathan W. Onorato, Christine K. Luscombe, Vinayak Bhat, Chad Risko, Ben Levy-Wendt, Michael F. Toney, Christopher R. McNeill, Guillaume Freychet, Mikhail Zhernenkov, Ruipeng Li, Lee J. Richter
Summary: Organic mixed ionic-electronic conductors (OMIECs) have the potential for various new technologies, but their complex behavior inhibits material design. This report presents the use of RXRD to determine the structure of a doped polymer OMIEC. The insights from RXRD provide important information on ion location and doping behavior, contributing to a better understanding of transport in OMIECs.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Nayon Park, Ryan A. Beck, Kevin K. Hoang, Dylan M. Ladd, Jared E. Abramson, Ricardo A. Rivera-Maldonado, Hao A. Nguyen, Madison Monahan, Gerald T. Seidler, Michael F. Toney, Xiaosong Li, Brandi M. Cossairt
Summary: We demonstrate the colloidal, layer-by-layer growth of metal oxide shells on InP quantum dots (QDs) at room temperature. The presence of surface-localized dark states near the band edges due to native InP QD surface oxides gives rise to nonradiative pathways, which can be reduced by replacing surface indium with zinc to form a ZnO shell. A synthetic strategy using stoichiometric amounts of common atomic layer deposition precursors in alternating cycles was developed for layer-by-layer growth. The results show the potential of controlling QD interfaces and contribute to the understanding of the connections between structural complexity and PL properties in colloidal optoelectronic materials.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Julian A. Steele, Eduardo Solano, David Hardy, Damara Dayton, Dylan Ladd, Keith White, Peng Chen, Jingwei Hou, Haowei Huang, Rafikul Ali Saha, Lianzhou Wang, Feng Gao, Johan Hofkens, Maarten B. J. Roeffaers, Dmitry Chernyshov, Michael F. Toney
Summary: Recent reports have increasingly utilized synchrotron-based grazing incident wide angle X-ray scattering (GIWAXS) to study metal halide perovskite thin films, which has proven to be invaluable for understanding structure-property relationships that limit optoelectronic performance. The GIWAXS technique is compatible with in situ and operando setups, and a growing research community has successfully used it to study kinetic and dynamic features in halide perovskite materials. This article aims to accelerate the learning curve for new experimentalists by providing a comprehensive framework for effective GIWAXS experiments.
ADVANCED ENERGY MATERIALS
(2023)
Article
Multidisciplinary Sciences
Joshua T. Del Mundo, Sintu Rongpipi, Hui Yang, Dan Ye, Sarah N. Kiemle, Stephanie L. Moffitt, Charles L. Troxel, Michael F. Toney, Chenhui Zhu, James D. Kubicki, Daniel J. Cosgrove, Esther W. Gomez, Enrique D. Gomez
Summary: In this study, grazing-incidence wide-angle X-ray scattering (GIWAXS) with a humidity chamber was used to investigate the properties of onion cell walls. The results showed that the lattice spacing of cellulose (110/110) slightly decreased upon drying, while the lattice parameters of (200) remained unchanged. The intensity of (110/110) diffraction increased relative to (200) in hydrated samples. Density functional theory models confirmed the changes in crystalline properties during drying. GIWAXS also revealed a peak attributed to pectin chain aggregation.
SCIENTIFIC REPORTS
(2023)
Article
Environmental Sciences
Valerie A. Niemann, Marten Huck, Hans-Georg Steinrueck, Michael F. Toney, William A. Tarpeh, Sharon E. Bone
Summary: This study investigated the fouling of RO membranes by calcium and silicon under realistic feed conditions using mu-X-ray fluorescence (mu-XRF) mapping and mu-X-ray absorption near-edge fine structure (mu-XANES) spectroscopy. The results showed that both calcium and silicon were abundant in the fouling layer. Additionally, organic compounds were closely related to the presence of calcium and silicon on the RO membrane. These findings provide important insight into the mechanism of RO membrane fouling.
Article
Chemistry, Physical
Luis Kitsu Iglesias, Emma N. Antonio, Tristan D. Martinez, Liang Zhang, Zengqing Zhuo, Steven J. Weigand, Jinghua Guo, Michael F. Toney
Summary: This study elucidates the mechanism of sodium storage in hard carbon anodes and provides insights into the preferred pore sizes, extent of pore filling, and the influence of defect concentration. It is observed that sodium in larger pores exhibits increased pseudo-metallic sodium character, and higher pyrolysis temperatures enhance the capacity of sodium stored in the pores. Additionally, sodium intercalation between graphene layers occurs simultaneously with pore filling in the plateau region. The findings highlight strategies to design superior hard carbon anodes for sodium-ion batteries.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Dario Gomez Vazquez, Travis P. Pollard, Julian Mars, Ji Mun Yoo, Hans-Georg Steinrueck, Sharon E. Bone, Olga Safonova, Michael F. Toney, Oleg Borodin, Maria R. Lukatskaya
Summary: By using coordinating anions like acetate, a WIS-like Zn coordination environment can be achieved even in relatively dilute conditions, enabling prolonged cycling of Zn metal anodes.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Physical
Stephanie L. Moffitt, Chuntian Cao, Maikel F. A. M. Van Hest, Laura T. Schelhas, Hans-Georg Steinrueck, Michael F. Toney
Summary: In this study, the existence of vertically heterogeneous thermally induced structural relaxation in amorphous In-Zn-O (a-IZO) thin films was observed using in situ X-ray reflectivity, which has not been previously observed. Thermal annealing was found to influence the electrical performance of the films. These findings are important for the development of a-IZO-based devices.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Alexander H. Jenkins, Erin E. Dunphy, Michael F. Toney, Charles B. Musgrave, J. Will Medlin
Summary: This study investigates the effects of modifying single-atom Rh-1/TiO2 catalysts with functionalized phosphonic acid monolayers on CO2 hydrogenation. The deposition of specific amine-functionalized ligands significantly enhances the catalytic activity and stability of the catalysts. The proximity of the amine functional group to the surface, controlled by adjusting the length of the phosphonic acid tail, plays a crucial role in the reactivity. The modification also improves the selectivity of the catalyst towards CO.
Article
Materials Science, Multidisciplinary
Oded Nahor, Aditi Khirbat, Sebastian Alexander Schneider, Michael F. Toney, Natalie Stingelin, Gitti L. Frey
Summary: The phase morphology of organic solar cell is crucial for its device performance. In this study, a coexistence of two glassy phases in the blend of donor polymer P3HT and acceptor molecule ITIC was revealed, and phase separation was observed in different blend ratios.
ACS MATERIALS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Vesta V. Zhelyaskova, Prachi Sharma, Paul I. Dron, Vikina Martinez, Josef Michl, Michael F. Toney, Daniel S. Dessau, Sean E. Shaheen
Summary: Polydimethylsiloxane (PDMS)-assisted crystallization (PAC) is a scalable method for growing crystalline organic semiconductor thin films. It allows the growth of polycrystalline C60 and highly oriented crystalline p-terphenyl thin films on amorphous substrates. The microstructures of the films vary with solvent, temperature, and substrate pre-treatment choices.
JOURNAL OF MATERIALS CHEMISTRY C
(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)