Article
Chemistry, Analytical
Chih-Yi Liu, Annada Sankar Sadhu, Riya Karmakar, Cheng-Shane Chu, Yi-Nan Lin, Shih-Hsin Chang, Goutam Kumar Dalapati, Sajal Biring
Summary: Sensitivity is a crucial factor in determining the quality of a fluorescence/phosphorescence-based gas sensor. This study demonstrates highly responsive phosphorescence-based optical oxygen sensors fabricated on highly porous anodic aluminum oxide (AAO) membranes. These sensors make use of the large surface area of the AAO to enhance the interaction between sensing molecules and analytes.
Article
Chemistry, Analytical
Ananthakrishnan Soundaram Jeevarathinam, Waqas Saleem, Nya Martin, Connie Hu, Michael J. McShane
Summary: A sensitive and scalable phosphorescent oxygen sensor formulation using ethyl cellulose (EC) and polystyrene (PS) nanoparticles stabilized with various surfactants was evaluated. The EC nanoparticles showed higher sensitivity and narrow size distribution compared to PS nanoparticles. The preferred formulation of EC nanoparticles protected with PF68 exhibited high oxygen sensitivity, wide phosphorescence lifetime response, and low cytotoxicity. These EC-PF68 nanoparticles were then encapsulated in alginate microspheres to create phosphorescent nanoparticles-in-microparticle (NIMs) for glucose and lactate sensing.
Article
Chemistry, Physical
Wei Zhao, Honglin Zhang, Li Xiao, Sai Chen, Yongpan Cheng, Hongbo Xu, Ke Zhang, Jiupeng Zhao, Yao Li
Summary: In this study, oxygen-sensing films were constructed using different types of polyethylene, with the LDPE/PtOEP film demonstrating better photostability and accurate measurement of dissolved oxygen concentrations in various water samples.
COLLOID AND POLYMER SCIENCE
(2021)
Article
Chemistry, Physical
Xiaoyi Zhan, Zheng Peng, Hao Huang, Hui Zhang, Zhao Liu, Xin Ou, Fan Yang, Zhi Liu
Summary: By employing low-energy Ar+ irradiation to modify the surface oxygen vacancy density of TiO2 and investigating its interaction with water using APXPS, key factors in tuning the photoelectrochemical performance of TiO2 have been revealed.
APPLIED SURFACE SCIENCE
(2021)
Article
Polymer Science
Do Yeob Kim, Dong Gyu Kim, Bongjin Jeong, Young Il Kim, Jungseok Heo, Hyung-Kun Lee
Summary: In this paper, a luminescent coordination polymer particle (CPP) that can selectively and sensitively respond to phosphate ions in an aquatic ecosystem is reported. The CPPs, embedded into membranes for reuse, exhibit consistent luminescence signals in different pH ranges. The practical application of the sensor is confirmed by detecting phosphate in actual environmental samples.
Article
Chemistry, Multidisciplinary
Nadiah Sabihah Natar, Nureel Imanina Abdul Ghani, Siti Raihan Hamzah, Muhammad Afiq Rosli, Nur Aien Muhamad, Mohammad Saifulddin Azami, Mohd Azlan Mohd Ishak, Sharin Razak, Wan Izhan Nawawi
Summary: This study investigates the effect of N and Pt co-dopant on the modification of TiO2 photocatalyst and compares different mode preparations. The results show that the NPseq-TiO2 photocatalyst prepared in sequential mode exhibits higher photocatalytic activity than unmodified TiO2 and PNrev-TiO2 photocatalyst. This is attributed to the incorporation of N elements and the formation of oxygen vacancies defects, which enhance the surface properties of the photocatalyst.
Article
Nanoscience & Nanotechnology
Jun-Ting Mo, Zheng Wang, Cheng-Yi Zhu, Yu Zhang, Mei Pan
Summary: In this study, a photo-active Ir-metalloligand was utilized to assemble with CdX2 under hydrothermal conditions, resulting in highly emissive two-dimensional metal-organic frameworks (2D MOFs). The transformed MOF showed sensitive oxygen-responsive properties, indicating the potential for the development of oxygen quenching blockers or sensors.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Seju Kang, Wei Wang, Asifur Rahman, Wonil Nam, Wei Zhou, Peter J. Vikesland
Summary: In this study, highly porous gold supraparticles were fabricated and evaluated as SERS substrates for the sensitive detection of environmental contaminants. The porous Au supraparticles successfully adsorbed six environmental contaminants and demonstrated quantitative SERS detection capability. They also enabled multiplex SERS detection and maintained sensitivity in wastewater influent, showing potential as practical and sensitive SERS devices for environmental analysis applications.
Article
Chemistry, Analytical
Dan Zhao, Xianfa Zhang, Wenjing Wang, Lili Sui, Chuanyu Guo, Yingming Xu, Xin Zhou, Xiaoli Cheng, Shan Gao, Lihua Huo
Summary: This paper reports the application of TiO2 sensors with oxygen vacancies for the detection of isopropylamine. The sensors exhibit excellent selectivity, moisture resistance, and long-term stability. The formation of abundant oxygen vacancies in the material contributes to its excellent performance, increasing the adsorption capacity of gas molecules. The lower limit of detection for isopropylamine is 0.2 ppm, which is significant for practical gas residue detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Engineering, Environmental
Haiyin Zhong, Ruixuan Wang, Zhihao Yan, Li Ling, Hong Li
Summary: Understanding the enhancement of Pt-O/Pt active sites through control of calcination temperature and irreversible adsorption of Bi(III) can significantly improve electrocatalytic activities. The presence of TiO2-950's electron-rich R(110) facet promotes the formation of bimetallic Bi-Pt sites, leading to a remarkable increase in electrocatalytic activity towards methanol oxidation.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Abdolmajid Taghipour, Arash Karimipour, Masoud Afrand, Somaye Yaghoubi, Mohammad Akbari
Summary: In this computational work, the atomic behavior of Ar and O-2 fluids in Pt micro-channels with external magnetic field was described using Dissipative Particle Dynamics (DPD) simulations. The maximum density of Ar/O-2 particles in platinum micro-channels was found to be 0.042/0.043, with a maximum velocity ratio of 0.104/0.097. Temperature variations among different fluid particles reached maximum values in 390/489 simulated bins of DPD box. These results are expected to be useful for optimizing industrial processes such as mass and heat transfer.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Inorganic & Nuclear
Guillermo Romo-Islas, Rosa M. Gomila, Antonio Frontera, Laura Rodriguez
Summary: Four series of Pt(ii) tweezer compounds were designed and synthesized to investigate their ability to form luminescent supramolecular assemblies. The compounds have a general chemical structure of (diphos)Pt(N<^>N<^>N), where diphos is a diphosphane that imparts a tweezer structure to the complexes. The four series differ in the substituents of the N<^>N<^>N ligands, which affect their electronic and bulk properties. Spectroscopic analysis and DFT calculations revealed the presence of intra- and intermolecular Pt•••Pt, Pt•••π, and π•••π interactions, leading to aggregates with varying stabilities. The aggregation process was analyzed in both solution and solid state, showing that emission properties are influenced by aggregation, as demonstrated by enhanced phosphorescence emission in the absence of chloride substituents.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Chemistry, Analytical
Yundi Huang, Bo Song, Kaiwen Chen, Deshu Kong, Jingli Yuan
Summary: This study developed two lysosome-targetable background-free TGL probes for efficient and accurate detection of 1O2, which can be used for monitoring endogenous 1O2 concentrations in lysosomes and discriminating variability induced by different photosensitizers. Furthermore, a smart luminescent sensor film was successfully prepared for on-site 1O2 production detection during PDT processes, offering a promising clinical monitoring tool for skin diseases.
ANALYTICA CHIMICA ACTA
(2024)
Article
Materials Science, Multidisciplinary
Mingming Hou, Junnan Yang, Weiwei Feng, Huiru She, Changhui Xin, Qian Li, Xin Yu
Summary: Extending solar-light harvesting regions and improving charge separation are contributing to high-performance semiconductor photocatalysis. In this work, ultrathin carbon-coated Fe-TiO2-x nanostructures were prepared via one-pot calcination strategy for tetracycline degradation under visible-light irradiation. The carbon-coated Fe-TiO2-x composites displayed remarkably enhanced visible-light harvesting and showed the highest charge separation and lowest interfacial migration resistance in the carbon-coated Fe-TiO2-x-3% sample, leading to the best photo catalytic performance with a rate constant of 0.02512 min-1 towards tetracycline degradation, approximately 3.02 times that of commercial TiO2.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Biochemistry & Molecular Biology
Crina Anastasescu, Simona Neagu, Silviu Preda, Daniela Culita, Mihaela Stancu, Cristian Banciu, Cornel Munteanu, Veronica Bratan, Jose Maria Calderon-Moreno, Razvan State, Mihai Anastasescu, Madalin Enache, Ioan Balint, Maria Zaharescu
Summary: ZnSe, ZnSe-TiO2, and TiO2 materials were synthesized using hydrothermal and sol-gel methods, and their antibacterial activity against Staphylococcus aureus and Micrococcus lysodeikticus was studied. The samples were characterized using microscopy techniques, UV-visible spectroscopy, and their ability to generate reactive oxygen species under visible light irradiation was investigated. The results showed a correlation between antibacterial activity and ROS photogeneration.
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)