Article
Chemistry, Physical
Bo Zhang, Nan Bao, Tao Wang, Yin Xu, Yue Dong, Yi Ni, Pingping Yu, Qufu Wei, Jing Wang, Lanlan Guo, Yi Xia
Summary: A batch of In2O3 nanowires were prepared using a simple electrospinning method and sintering process, showing high purity and crystallinity through XRD analysis. The nanowires exhibited high quality and uniformity based on FESEM and TEM analysis. The sensor based on In2O3 NWs showed high selectivity towards NO2 and low detection limit, but had a significant defect of long recovery process, which was successfully solved by introducing visible light irradiation.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Yanna Liu, Sheng Li, Song Xiao, Ke Du
Summary: In this study, a p-n MoS2-In2O3 heterojunction sensor was constructed to achieve high-sensitivity detection of ppb-level NO2 at room temperature. The improved sensing performance was attributed to the p-n heterojunction at the MoS2-In2O3 interface, increased oxygen vacancies and chemisorbed oxygen, unique structure, as well as the exposed sulfur active sites and chemical bonds introduced from MoS2.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Analytical
Yongjiao Sun, Baoxai Wang, Shuaiwei Liu, Zhenting Zhao, Wenlei Zhang, Wendong Zhang, Koichi Suematsu, Jie Hu
Summary: The fabrication and investigations of a novel NO2 gas sensor based on a 1T and 2H mixed phase WS2 quantum dots (QDs) modified MOF-derived hollow In2O3 (WS2 QDs@In2O3) heterostructure were documented. The proposed gas sensor based on WS2 QDs@In2O3 hollow hexagonal prisms was simple, sensitive, cost-effective and worked at room temperature (25 +/- 2 degrees C). The response value of 3 wt% WS2 QDs@In2O3 (W3In) towards 100 ppm NO2 could reach to 2034, which was an ultra-high value and almost 7.7 times higher than that of pure In2O3. Besides, our sensor showed excellent selectivity to NO2 and could detect concentration down to 100 ppb. The enhanced NO2 sensing performance was observed due to the synergistic effect between WS2 and In2O3. Furthermore, the compensation response values to NO2 based on the response to water vapor under different humidity of W3In were calculated and their fluctuations are within 7.8 % compared with the response under 25 % RH, which could provide a new strategy for accurately detecting NO2.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Engineering, Environmental
Chaohan Han, Xiaowei Li, Yu Liu, Xinghua Li, Changlu Shao, Jisong Ri, Jiangang Ma, Yichun Liu
Summary: A room-temperature NO2 sensor with greatly enhanced sensitivity and rapid response/recovery speed under ultraviolet (UV) illumination has been proposed. The sensor based on In2O3/ZnO yolk-shell nanofibers exhibits remarkable sensitivity and quick response/recovery time, outperforming the performance in dark conditions. These results were attributed to the improved photo-generated charge separation efficiency and increased reactive sites and gas adsorption provided by the heterojunction effect of In2O3/ZnO yolk-shell nanofibers.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Physical
Zhicheng Cai, Jiho Park, Sunghoon Park
Summary: A series of porous Au nanoparticles (NPs) decorated with In2O3 nanoparticles (NPs) was embedded in ZnO nanofibers (NFs) using electrospinning and calcination methods. The gas-sensing properties of the resulting sensors were evaluated and it was found that the addition of In2O3 improved the response properties. The sensor with 0.03 g In(NO3)3 (S2) showed excellent stability, selectivity, and a high response to NO2 gas under UV irradiation at room temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Analytical
Dong Wang, Chenshuai Han, Chunxiang Zheng, Hairui Fang, Dongfu Xu, Hongbin Zhao
Summary: TiO2 QDs-decorated In2O3 composite was synthesized via electrospinning, and SEM and TEM showed the self-assembly of In2O3 nanotubes with uniform dispersion of TiO2 QDs. XPS results revealed increased oxygen deficiency proportion by TiO2 QDs. The sensor based on IT1 sample had a 7.76 times higher response to 10 ppm NO2 (214.3) compared to IT0. The sensor exhibited fast response/recovery characteristics, low detection limit, and high moisture resistance. The enhanced sensing performance was attributed to electronic and geometrical effects. The method of QDs-induced oxygen deficiency and in-depth study of the sensing mechanism provide new perspectives for NO2 gas sensor construction.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Yumeng Liu, Jinniu Zhang, Gang Li, Jia Liu, Qingfei Liang, Hongjun Wang, Yuanyuan Zhu, Jianzhi Gao, Hongbing Lu
Summary: In2O3-ZnO nanotubes prepared by a solvent thermal method show high response and selectivity towards NO2, making them a promising material for sensitive detection of ppb-level NO2.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Zhidong Jin, Chengxiang Wang, Lili Wu, Haixiang Song, Xingyu Yao, Jiurong Liu, Jinbo Zhao, Zhihui Zeng, Fenglong Wang
Summary: Ni-doped In2O3 nanoparticles were synthesized via a simple metal-organic framework-derived solvothermal method, exhibiting ultrafine particles with an average size of 13 nm. The gas sensing tests showed that the sensors composed of Ni-doped In2O3 nanoparticles had fast response/recovery properties, with response and recovery speeds of 2 and 2 s, respectively, towards 10 ppm NO2. Moreover, the sensors demonstrated high sensitivity with a response value of about 70 at the optimum working temperature of 200 degrees C and a low detection limit of 5 ppb.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Nanoscience & Nanotechnology
Pavithra Murugesh, Mathankumar Ganesan, Ponnusamy Suruttaiya Udaiyar, Harish Santhana Krishnan, Archana Jayaram, Navaneethan Mani
Summary: Over the past decade, the application of p-n heterojunction-based sensing in gas sensors has gained significant interest. This study synthesized a p-type cobalt oxide/n-type tin oxide (p-Co3O4/n-SnO2) heterojunction and investigated its gas-sensing performance. The results showed that the prepared 10% Co3O4/SnO2 nanostructured sensor exhibited high gas response and low operating temperature.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Jinniu Zhang, Deying Leng, Lizhai Zhang, Gang Li, Fei Ma, Jianzhi Gao, Hongbing Lu, Benpeng Zhu
Summary: By adjusting the heating rate, the porosity and oxygen vacancy of mesoporous WO3 nanofibers were tuned, leading to enhanced low-temperature NO2 sensing performances.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
S. C. Kulkarni, Krishna D. Bhalerao, Sayantra Shirse, Yogesh T. Nakate, Umesh T. Nakate, Bidhan Pandit, M. A. Yewale
Summary: The pristine and various mole% (1, 3, 5, 7, and 9) Zn-doped In2O3 nanocrystalline materials were successfully prepared using sol-gel and screen-printing thick film methods. The 7% mole Zn doped In2O3 sensor showed superior gas sensing properties and excellent selectivity towards NO2 gas compared to other doped and pure In2O3 sensors. The highest response of 117 was obtained for 100 ppm NO2 gas at 50 degrees C temperature.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Sufaid Shah, Shuai Han, Shahid Hussain, Guiwu Liu, Tengfei Shi, Asma Shaheen, Ziwei Xu, Mingsong Wang, Guanjun Qiao
Summary: Nanomaterials have a wide range of applications in environmental nanotechnology. This paper describes the preparation of In2O3 @GO nanocomposites with outstanding gas sensing performance towards NO2.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Analytical
Jiayin Han, Dehao Kong, Weirong Zhou, Yubing Gao, Yuan Gao, Guannan Liu, Fangmeng Liu, ChenGuang Wang, Peng Sun, Geyu Lu
Summary: Rational interface design, in this study, was used to enhance gas sensing performance. Large-scale heterogeneous interfaces consisting of In2O3 sheets with rGO modification were constructed, demonstrating improved response, selectivity, and stability. The introduction of rGO on In2O3 sheets enhanced gas and carriers exchange, resulting in superior sensing performance.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Ji Zhang, Fangfang Zhang, Xu Li, Qingji Wang
Summary: With the increase in the number of cars, the concentration of NO2 in the air has been continuously increasing, posing a threat to both human health and the environment. This study focuses on the development of high-performance, low detection limit NO2 sensors using flower-like Au-loaded In2O3. The results show that the sensor based on 0.5 mol% Au/In2O3 exhibits significantly improved gas-sensing properties towards NO2, with a high response value and low detection limit.
Article
Chemistry, Multidisciplinary
Zhicheng Cai, Jiho Park, Doyeon Jun, Sunghoon Park
Summary: Porous TiO2 nanoparticle-embedded In2O3 nanofibers were synthesized for fabricating room temperature nitrogen dioxide gas sensors. The TiO2/In2O3 nanofibers exhibited higher response, shorter response and recovery times, better reproducibility, and improved selectivity to NO2 compared to pure In2O3 nanofibers. The enhanced NO2 sensing performance of the composite can be attributed to the formation of the TiO2/In2O3 n-n heterojunction, porous structure of the nanofibers, enhanced light absorption, and large number of O vacancies.
Article
Chemistry, Multidisciplinary
Linda Kothe, Maximilian Albert, Cedrik Meier, Thorsten Wagner, Michael Tiemann
Summary: The free exciton transition of ZnO can be enhanced and stimulated by a photonic structure, while the deep-level emission can be suppressed. By tuning the optical bandgap of the reflector and the deposition of ZnO layer, the emission can be modulated.
ADVANCED MATERIALS INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Ali Javed, Felix Steinke, Stephan Woehlbrandt, Hana Bunzen, Norbert Stock, Michael Tiemann
Summary: The proton conductivity of two coordination networks, [Mg(H2O)(2)(H3L)]center dot H2O and [Pb-2(HL)]center dot H2O, was investigated. The two materials have the same linker molecule, but different crystal structures, resulting in significant differences in proton conductivity. The Mg-based coordination network with an extended hydrogen bonding network exhibits moderate proton conductivity, while the Pb-based metal-organic framework with no extended hydrogen bonding shows lower proton conductivity.
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2022)
Article
Computer Science, Information Systems
Haoyun Yuan, Jinkai Li, Zhibo Zhao, Zeyu Wang, Matteo Bruno Lodi, Giovanni Gugliandolo, Nicola Donato, Giovanni Crupi, Liming Si, Xiue Bao
Summary: This paper presents a novel multi-layered waveguide-fed slotted cavity antenna array operating in the K-band. The antenna consists of a 64 (8 x 8) groups of 2 x 2 subarrays with low profile and is fed by a 1-64 ways waveguide corporate-feed-network. The proposed antenna array achieves a broad bandwidth of 21.9% and a good gain of 29.1 dBi, with sidelobe levels as small as -28.3 dB and -20 dB in the E-plane and the H-plane, respectively. The overall size of the slotted cavity antenna array is 169.6 x 169.6 x 7.23 mm(3).
Article
Chemistry, Analytical
Michele Astolfi, Giorgio Rispoli, Sandro Gherardi, Giulia Zonta, Cesare Malagu
Summary: Nowadays, the reproducibility and response repeatability assessment of sensors used in medical-diagnostic, environmental monitoring, etc. devices are crucial. Thermo-activated chemoresistive sensors have been widely employed, with (SnTiNb)O-2 nanosensors showing particular suitability in the medical and biological fields. Laboratory testing and statistical analysis of a set of thirteen randomly selected sensors demonstrated their consistency in detecting and discriminating low CO concentrations and high humidity levels with high repeatability.
Article
Chemistry, Analytical
Milos Radojkovic, Giovanni Gugliandolo, Mariangela Latino, Zlatica Marinkovic, Giovanni Crupi, Nicola Donato
Summary: In this paper, a novel approach is proposed for modeling the temperature-dependent behavior of a surface acoustic wave (SAW) resonator. The temperature dependence of the equivalent circuit parameters/elements (ECPs) is modeled using artificial neural networks (ANNs), making the equivalent circuit model temperature-dependent. The developed ANN-based model is validated using scattering parameter measurements performed on a SAW device under different temperature conditions.
Article
Chemistry, Multidisciplinary
Dominik Baier, Tatiana Priamushko, Christian Weinberger, Freddy Kleitz, Michael Tiemann
Summary: Mesoporous copper-ceria (Cu-CeO2) materials with large specific surface areas and uniform porosity are prepared using nanocasting method, and their textural properties are characterized. The oxidation states of copper (Cu+, Cu2+) and cerium (Ce3+, Ce4+) are investigated, which shows that copper is a necessary component. These materials are used as resistive gas sensors and can discriminate between hydrogen (H2) and carbon monoxide (CO) with low cross-sensitivity to humidity. By measuring both gases simultaneously, selective sensing of CO in the presence of H2 can be realized.
Article
Oncology
Michele Astolfi, Giorgio Rispoli, Gabriele Anania, Giulia Zonta, Cesare Malagu
Summary: Given the high prevalence of colorectal cancer worldwide and its lack of specific symptoms, it is crucial to develop and validate low-invasive techniques for its detection. In this study, a device based on nanostructured gas sensors was used to analyze and differentiate the breath of blood samples collected from colorectal cancer patients at different stages of their treatment path. The device successfully distinguished between pre-surgery samples with tumors and post-surgery samples after tumor removal. These findings are promising for the clinical validation and future use of the device in clinical follow-up, patient monitoring, and detection of post-treatment relapses.
Article
Computer Science, Information Systems
Giovanni Crupi, Mariangela Latino, Giovanni Gugliandolo, Zlatica Marinkovic, Jialin Cai, Gianni Bosi, Antonio Raffo, Enza Fazio, Nicola Donato
Summary: This paper focuses on the modeling of scattering parameter measurements for a 0.25 μm GaN HEMT on SiC substrate under extreme operating conditions. Three different modeling approaches, namely, equivalent-circuit model, artificial neural networks (ANNs), and gated recurrent units (GRUs), are investigated. The pros and cons of each modeling approach are discussed, highlighting the importance of selecting the appropriate modeling method based on the target performance and specifications.
Article
Engineering, Electrical & Electronic
Gaurav Bhargava, Shubhankar Majumdar, Giovanni Gugliandolo, Giuseppe Campobello, Nicola Donato, Giovanni Crupi
Summary: This letter proposes an innovative, low-cost antenna-based solution for microwave imaging of reinforced cement concrete (RCC) structures. An RCC beam is placed between vertically polarized antenna pair at a distance of 13 cm apart, within a 3-D printed frame. The analysis shows that the antenna pair works well at 2.4 GHz frequency and 13 cm distance, making it a suitable frequency for microwave imaging of the RCC beam.
IEEE SENSORS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Michele Astolfi, Giulia Zonta, Sandro Gherardi, Cesare Malagu, Donato Vincenzi, Giorgio Rispoli
Summary: This study introduces a portable device that can quickly calibrate and characterize chemoresistive nanostructured gas sensors in laboratory and field applications. The device has automated features, allowing for precise setting of the sensor's working temperature and recording of its responses to different gases and environments.
Review
Chemistry, Analytical
Giulia Zonta, Giorgio Rispoli, Cesare Malagu, Michele Astolfi
Summary: The necessity of detecting and recognizing gases is crucial, and gas sensors, especially chemoresistive sensors, have promising applications in fields such as medicine, particularly in the screening and monitoring of tumors.
Article
Engineering, Electrical & Electronic
Filippo Battaglia, Giovanni Gugliandolo, Giuseppe Campobello, Nicola Donato
Summary: Recent advancements in wireless communication protocols have led to the development of wearable devices and sensor networks for health monitoring and diagnostics. This article focuses on a new architecture called EEG-over-Bluetooth low energy (BLE) that offers low power consumption for multichannel EEG. The proposed architecture utilizes a low-power analog front-end (AFE) for EEG signals and a system-on-chip (SoC) that supports the Bluetooth 5.0 protocol. It also introduces an efficient EEG compression algorithm and a simplified channel encoding scheme for improved energy consumption and network performance.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Engineering, Electrical & Electronic
Giovanni Gugliandolo, Giovanna Vermiglio, Giuseppina Cutroneo, Giuseppe Campobello, Giovanni Crupi, Nicola Donato
Summary: In this study, the inkjet-printing technique is used to develop a planar microwave sensor for the characterization of biological samples. The sensor consists of two split-ring resonators fabricated using the microstrip technology. The effective permittivity of a water-ethanol mixture is varied by changing the ethanol volume fraction, and the sensor's resonant frequencies are affected by the capacitive coupling between the resonators. A lumped-element equivalent-circuit model is presented to estimate and discuss the changes in the circuit elements with ethanol concentration.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Engineering, Electrical & Electronic
Giovanni Gugliandolo, Giovanni Crupi, Valeria Vadala, Antonio Raffo, Nicola Donato, Giorgio Vannini
Summary: This paper presents a measurement-based analysis of the transistor current-gain peak (CGP), which involves a sudden peak in the short-circuit current-gain (h21) at a specific frequency. A systematic and numerical approach is proposed, utilizing the complex Lorentzian function to accurately fit the experimental data and extract the parameters related to CGP. The developed technique is validated through analyzing CGP for a gallium nitride (GaN) high-electron-mobility transistor (HEMT) under different temperatures and bias conditions.
IEEE MICROWAVE AND WIRELESS TECHNOLOGY LETTERS
(2023)
Article
Computer Science, Information Systems
Andrea Apicella, Pasquale Arpaia, Egidio De Benedetto, Nicola Donato, Luigi Duraccio, Salvatore Giugliano, Roberto Prevete
Summary: This work explores the use of Machine Learning (ML) and Domain Adaptation (DA) in Brain-Computer Interfaces (BCIs) based on Steady-State Visually Evoked Potentials (SSVEPs). Traditional classification strategies do not consider the non-stationarity of brain signals, resulting in poor performance for real-time interaction. ML and DA techniques can improve SSVEPs classification pipelines and achieve higher accuracy, even for short-time signals.
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)
