Article
Electrochemistry
Zhong-Hong Shi, Yu-Jen Hsiao, Sheng-Chang Wang, Wei-Chen Tien
Summary: The gas sensing element is produced using the micro-electro-mechanical systems (MEMS) method. The sensing layer is made by depositing indium oxide (InOx) thin films on Tin oxide (SnO2) using RF Sputter and plasma-enhanced atomic layer deposition (PE-ALD) technology to form an n-n type double-layer structure. The results show that the response of SnO2-InOx and monolayer SnO2 is 153% and 55% respectively, with an improvement of 98% under exposure to 0.6 ppm NO2, and the sensor achieves the best sensing at 200 degrees C (approximately 14 mW). The selectivity test with four other gases, such as SO2, H-2, CO, and NH3, shows the specificity for NO2 with the lowest NO2 concentration being 0.2 ppm.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Materials Science, Ceramics
Bongho Jang, Jaewon Jang, Jae Eun Jang, Hyuk-Jun Kwon
Summary: This study fabricated high-performance SnO2 thin-film transistors (TFTs) at temperatures below 300 degrees C using the combustion-assisted sol-gel method. The results showed that the combustion-assisted solution process significantly increased the field-effect mobility of SnO2 TFTs compared to the conventional solution process, potentially enabling low-cost solution-processed electronics.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Sovandeb Sen, Sourav Maity, Susmita Kundu
Summary: In this study, reduced graphene oxide (rGO) decorated NiO-SnO2 nanocomposites were successfully synthesized and their structural, morphological, and optical properties were characterized. The incorporation of rGO increased the surface area of the nanocomposite, which was expected to improve gas sensing at room temperature. The optimized sensors showed excellent sensitivity towards acetone and selectively detected trace concentration of acetone in exhaled breath.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Review
Engineering, Electrical & Electronic
Ziteng Li, Wen Zeng, Qingting Li
Summary: This review focuses on the application and performance of SnO2-based gas sensors in detecting VOC such as formaldehyde, ethanol, acetone, etc.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Nanoscience & Nanotechnology
Tingting Chen, Jianhai Sun, Ning Xue, Wen Wang, Zongchang Luo, Qinqin Liang, Tianye Zhou, Hao Quan, Haoyuan Cai, Kangsong Tang, Kaisheng Jiang
Summary: Cu-doped SnO2/rGO nanocomposites prepared by a solvothermal method show promising potential as H2S sensors due to their excellent selectivity, linear working range, response time, and detection ability at low concentrations. The superior sensing properties are attributed to catalytic sensitization by the Cu dopant and a synergistic effect of the Cu-SnO2 and rGO.
MICROSYSTEMS & NANOENGINEERING
(2023)
Article
Polymer Science
Irina Kononova, Vyacheslav Moshnikov, Pavel Kononov
Summary: Porous nanocomposites using two and three-component systems were created for gas sensors with the sol-gel method. The Langmuir model and the Brunauer-Emmett-Teller theory were used for calculations to understand the physical-chemical processes during gas adsorption. X-ray diffraction, thermogravimetric analysis, and other techniques were used to analyze the interaction between components and determine optimal annealing temperature. Introduction of a semiconductor additive increased the sensitivity of the nanostructured layers to reductional reagent gases.
Article
Chemistry, Physical
Xi-Tao Yin, Sai-Sai Wu, Davoud Dastan, Shuai Nie, Ying Liu, Zhi-Gang Li, Yan-Wen Zhou, Jing Li, Abdessamad Faik, Ke Shan, Zhicheng Shi, Maryam Abbasi Tarighat, Xiao-Guang Ma
Summary: In this study, SnO2-Mn3O4 nanocomposites were prepared and characterized for gas sensing properties. It was found that the composites exhibit n-type response to H-2 and CO for a Sn to Mn molar ratio greater than 1:2.33, and p-type response for a molar ratio smaller than 1:2.33. Interestingly, a reverse sensing behavior was observed when the ratio was 1:2.33.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Physical
Fanpu Meng, Jinyong Hu, Can Liu, Yuming Tan, Yong Zhang
Summary: The gas sensor based on YbFeO3 nanocrystallines showed the best response ability and selectivity towards acetone gas among the sensors fabricated using different lanthanide elements. The rapid response/recovery characteristic and low detection limit of the YbFeO3 gas sensor can be attributed to the low binding energy of the Ln-O bond in lanthanide.
CHEMICAL PHYSICS LETTERS
(2021)
Article
Materials Science, Ceramics
Kuo-Chin Hsu, Bo-Da Chen, Te-Hua Fang, Chao-Ming Hsu
Summary: In this study, tungsten oxide (WO3) nanofibers were prepared using electrospinning technology and combined with La0.8Pb0.2FeO3 (LPFO) perovskite materials to form a heterostructure film for gas sensing applications. The pure WO3 nanofiber gas sensor showed excellent sensing for nitrogen dioxide (NO2) and hydrogen sulfide (H2S), while the WO3/LPFO heterostructure film gas sensor exhibited a high response to H2S but suppressed response to NO2. The WO3/LPFO heterostructure film gas sensor greatly improved gas selectivity, with specific sensitivity towards H2S gas.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Analytical
Sungjin Kim, Deok-Hyun Cho, Hyeon-Kyung Chang, Ho-Nyun Lee, Hyun-Jong Kim, Tae Joo Park, Young Min Park
Summary: In this study, a controlled porous structure for photoactive gas sensors was fabricated using gas-flow thermal evaporation and atomic layer deposition method. By adjusting the pressure during thermal evaporation and depositing TiO2 layers on the surface of SnO2, selective response to specific gases was achieved. The experimental results showed that the nanoporous SnO2 exhibited high response rate and low detection limit, and the addition of TiO2 layer significantly improved the selective response to HCHO.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Electrochemistry
Pei-Te Lin, Chih-Ying Yu, Sin-Huei Ho, Shiuan-Wei Pan, Jyun-Siang Jhang, Yi-Xun Zhang, Yo-Lun Zhang, Tian-Tsz Hsieh, Hao-Chien Wang, Wen-Jeng Hsueh, Chun-Ying Huang
Summary: The photochemical activation process is a promising way to operate metal oxide gas sensors at room temperature, but currently limited to n-type semiconductors. In this study, a highly stable p-type copper gallium oxide (CuGaO2) gas sensor was fabricated through the facile sol-gel process. It can detect O-3 gas at room temperature and its gas response can be further enhanced by UV activation, achieving a highest gas response of 7.12 to 5 ppm O-3 gas at a UV intensity of 10 mW cm(-2). Additionally, the CuGaO2 sensor exhibits excellent long-term stability with only approximately 3% degradation over 90 days.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Yan-Fong Lin, Bo-Chang Dong, Su-Yu Liao, Bo-Rui Chen, Li-Zhen Lin, Yung-Yi Chang, Min-Hsin Wu, Po-Yu Su, Bo-Cheng Chen, Wen-Jeng Hsueh, Chun-Ying Huang
Summary: Activating metal oxide-based gas sensors using UV-LED is a promising approach to operating them at low temperatures. A remarkably sensitive and stable gas sensor based on solution-processed p-type copper aluminum oxide (CuAlO2) is presented in this report, which can sense O3 gas at room temperature and has improved sensitivity through UV radiation. CuAlO2 sensor exhibits outstanding stability, with a deterioration of only -10% over a period of 3 months, suggesting it as a promising material for gas sensing at room temperature.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Analytical
Phan Hong Phuoc, Nguyen Ngoc Viet, Le Viet Thong, Chu Manh Hung, Nguyen Duc Hoa, Nguyen Van Duy, Hoang Si Hong, Nguyen Van Hieu
Summary: The study explored the gas-sensing performance of composite nanofibers with internal and external hetero-junctions of ZnO-SnO2, revealing enhanced response compared to mixed nanofibers. The gas-sensing mechanism of the hetero-nanojunctions was analyzed, attributing the remarkable gas sensing performance to the formation of internal heterojunctions.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Sahil Gasso, Manreet Kaur Sohal, Aman Mahajan
Summary: This study synthesized MXene-based SnO2 heterostructures for room-temperature NO2 detection. The optimized SnO2/MXene heterostructures exhibited high response and short response and recovery time towards 30ppb NO2 at room temperature. The sensor also showed high selectivity, sensitivity, repeatability, and stable sensing response under humid conditions.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Nanoscience & Nanotechnology
Wenbo Pi, Xi Chen, Muhammad Humayun, Yang Yuan, Wen Dong, Guangzu Zhang, Bingbing Chen, Qiuyun Fu, Zixiao Lu, Honglang Li, Zaiqi Tang, Wei Luo
Summary: NASA has successfully detected H2S in the lunar South Pole's shadowed region using NIR and UV/vis spectroscopy remotely, but in situ detection is considered more accurate. In this study, researchers have developed an in situ semiconductor H2S gas sensor that can operate at subzero temperatures with the assistance of UV illumination. This new sensor design demonstrates a fast response time and high sensitivity, filling the gap for semiconductor gas sensors capable of working in extreme low temperatures and suggesting a potential method for gas detection in deep space exploration.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Analytical
Jean-Baptiste Sanchez, Angela Sanchez-Sanchez, Maria Teresa Izquierdo, Sandrine Mathieu, Jaafar Ghanbaja, Franck Berger, Alain Celzard, Vanessa Fierro
Article
Chemistry, Multidisciplinary
Asma Chargui, Raya El Beainou, Alexis Mosset, Sebastien Euphrasie, Valerie Potin, Pascal Vairac, Nicolas Martin
Article
Chemistry, Physical
Valerie Potin, Nicolas Zanfoni, Luc Imhoff, Pardis Simon, Bruno Domenichini
APPLIED SURFACE SCIENCE
(2020)
Article
Nanoscience & Nanotechnology
Achraf El Mohajir, Jimena Castro-Gutierrez, Rafael Luan Sehn Canevesi, Igor Bezverkhyy, Guy Weber, Jean-Pierre Bellat, Franck Berger, Alain Celzard, Vanessa Fierro, Jean-Baptiste Sanchez
Summary: A highly sensitive and selective silicon-based microanalytical prototype was used to identify trace VOCs in indoor air, with the integration of a new nonactivated tannin-derived carbon, a MOF, and a zeolite for preconcentration. The DM2C adsorbent demonstrated excellent stability, repeatability, and performance in detecting low concentrations of VOCs even in the presence of humidity.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Raya El Beainou, Jean-Marc Cote, Valerie Potin, Nicolas Martin
Summary: Janus-like W-Cu films with a tilted columnar architecture are prepared using GLAD co-sputtering, showing contrasting morphologies in column growth when facing W or Cu targets. SEM observations reveal a granular and rough aspect on the side receiving Cu atoms, while dense columns with a saw-tooth profile are formed in front of the W flux. High resolution TEM analysis supports these distinct morphologies, discussing growth mechanisms and occurrence of diverse crystallographic phases in the column cross-section.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Chemistry, Analytical
Vignesh Gunasekaran, Soffian Yjjou, Eve Hennequin, Thierry Camps, Nicolas Mauran, Lionel Presmanes, Philippe Menini
Summary: The paper introduces a new method for making gas sensors by creating a network of head-to-tail facing PN junctions on the same chip to miniaturize the sensor network and reduce the heating power required. The study aims to evaluate the potential of this diode network as a gas sensor, and presents the technological process and test results conducted under variable atmospheres.
Article
Computer Science, Information Systems
Cyril Tropis, Nicolas Dufour, Germain Garcia, Gerard Montseny, Chaabane Talhi, Frederic Blanc, Bernard Franc, Philippe Menini
Summary: The study aimed to find an efficient method for interpolating metal oxide gas sensors in a pulsed-temperature operating mode. Different interpolation methods were compared, with the diffusive representation being the most effective in converting measurements into output coefficients.
Article
Materials Science, Multidisciplinary
Valerie Potin, Houssem Boukhalfa, Nicolas Martin
Summary: In this study, two series of tungsten thin films were sputtered on silicon and glass substrates using oblique angle co-deposition technique. The effects of deposition parameters on the films' microstructure and electrical properties were investigated. It was found that the deposition parameters greatly influenced the films' properties.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Applied
Mohit Kumar, Achraf E. L. Mohajir, Franck Berger, Marina Raschetti, Jean-Baptiste Sanchez
Summary: Zeolite coated quartz crystal microbalance (QCM) is proposed as an efficient sensor for the detection of ethanol at room temperature. The BEA coated QCM sensor exhibited the best performances, and the sensing mechanism is based on unstable protonated dimers, water and diethyle ether residues.
MICROPOROUS AND MESOPOROUS MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Mohit Kumar, Achraf El Mohajir, Franck Berger, Marina Raschetti, Jean-Baptiste Sanchez
Summary: A highly sensitive DaY/SnO2 NP sensor was developed for the detection of LCBs at low concentrations. The sensor showed efficient performance for propanol detection with fast response time and stability. The activation energy for all LCBs was calculated, and a sensing mechanism was proposed based on the catalytic behavior of DaY zeolite and the activation energy of LCBs.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Analytical
Achraf El Mohajir, Mohammad Arab Pour Yazdi, Anna Krystianiak, Olivier Heintz, Nicolas Martin, Franck Berger, Jean-Baptiste Sanchez
Summary: SnO2 thin films were prepared using different methods and their gas sensing properties were investigated. The results showed that films grown under specific conditions and annealed exhibited the best response to benzene, and pollutant discrimination can be achieved by combining signals from multiple sensors.
Article
Chemistry, Analytical
Jaime Gomez-Suarez, Patricia Arroyo, Maria Cerrato-Alvarez, Esther Hontanon, Sergio Masa, Philippe Menini, Lionel Presmanes, Raimundo Alfonso, Eduardo Pinilla-Gil, Jesus Lozano
Summary: This study compared the performance of two metal-oxide semiconductor sensors for monitoring tropospheric ozone in ambient air, showing that the manufactured sensors outperformed commercial ones. The machine learning algorithm based on Support Vector Regression successfully converted resistive values into ozone concentration.
Proceedings Paper
Materials Science, Multidisciplinary
Omar Bouaaliouat, Houda Lahlou, Es-Said Akhouayri, Ahmed Ihlal, Abdeljalil Benlhachemi, Daniel Prades, Vanessa Fierro, Alain Celzard, Franck Berger, Jean-Baptiste Sanchez
MATERIALS TODAY-PROCEEDINGS
(2020)
Proceedings Paper
Materials Science, Multidisciplinary
Radouane Leghrib, Yassine Aantri, Jean Baptiste Sanchez, Franck Berger, Abderrazak Kaaya
MATERIALS TODAY-PROCEEDINGS
(2020)
Proceedings Paper
Materials Science, Multidisciplinary
Xiaolong Xu, Mohammad Arab Pour Yazdi, Jean-Baptiste Sanchez, Alain Billard, Franck Berger, Nicolas Martin
MATERIALS TODAY-PROCEEDINGS
(2019)
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)
