Article
Chemistry, Physical
Xiangli An, Bowen Zhang, Chongyang Wang, Zhiyong Zhao, Saisai Zhang, Hari Bala, Zhanying Zhang
Summary: Highly regular TiO2 nanorod array films were synthesized in situ on FTO using a simple hydrothermal method, and ZnO shell layers were grown on the nanorods to form a core-shell structure. The TiO2/ZnO nanocomposites showed enhanced ethanol sensing performances compared to TiO2 nanorods, with a low working temperature, higher sensitivity, and faster response capability. The optimum sensor based on 2c-TiO2/ZnO exhibited a significantly higher response to 50 x 10-6 C2H5OH at 340°C compared to the TiO2 sensor. The improved ethanol sensing mechanism was attributed to the unique nanorod array structure and the heterojunctions between TiO2 and ZnO.
JOURNAL OF MATERIOMICS
(2023)
Article
Chemistry, Analytical
Yan Gong, Xiaofeng Wu, Xiaofei Li, Anqi Wang, Min Zhang, Yunfa Chen
Summary: Core-shell Pt@Al-doped ZnO nanoparticles were synthesized and assembled into a sensor, showing excellent sensitivity and low detection limit towards acetone. The synergistic effect between Al doping and metal-ZnO hetero-interfaces significantly improves the acetone sensing properties of the sensor.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Shichao Wang, Xiaohu Wang, Gaoqun Qiao, Xiaoyan Chen, Xinzhen Wang, Hongzhi Cui
Summary: Core-double shell-structured ZnO@In2O3@ZnO microspheres were successfully synthesized by decorating In2O3 and ZnO on the surface of ZnO hollow microspheres, exhibiting excellent gas sensing properties with high response to gases like ethanol, especially at low concentrations. This superior gas sensing performance was attributed to its high specific surface area, abundant surface defects, and radial electronic modulation mechanism.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Nanoscience & Nanotechnology
Xiaoyan Song, Fangzheng Zhao, Zhipeng Wang, Runbin Ge, Jinfeng Xing
Summary: In this study, ZnO@SnO2-Pt core-shell nanofibers with a hollow structure were successfully prepared and exhibited superior gas-sensing performance, achieving higher response speed and sensitivity on the basis of reduced operating temperature. Additionally, the gas-sensing mechanism of the nanofibers was discussed in detail.
ACS APPLIED NANO MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Xiaohua Jia, Tiantian Liu, Shaopei Feng, Shouwen Yu, Jintao Zhang, Jin Yang, Sizhe Wang, Yong Li, Haojie Song
Summary: A new core-shell structure of ZnO@ZIF-CoZn was successfully synthesized for highly sensitive and stable monitoring of ethanol. The synthesized material exhibited excellent gas sensitivity, selectivity, and a lower optimal working temperature compared to pure ZnO. Based on its unique nanostructure, low cost, and promising ethanol sensing performance, ZnO@ZIF-CoZn is expected to become a candidate material in the ethanol sensor market.
Article
Nanoscience & Nanotechnology
Yingmeng Zhang, Shaojun Li, Luting Liu, Yihan Lin, Shengyang Jiang, Yongliang Li, Xiangzhong Ren, Peixin Zhang, Lingna Sun, Hui Ying Yang
Summary: This study presents a novel core-shell-shell Sb2S3/Sb@TiO2@C nanorod composite, which exhibits enhanced energy storage performance. The Sb2S3/Sb cores are partially reduced into metallic Sb and the TiO2 shell creates oxygen vacancies during the carbothermic reduction process. The double-shelled design of TiO2 and carbon provides dual protection and buffers the volume changes.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Analytical
Mingqi Sun, Mingyuan Wang, Chuanxin Ge, Jingran Huang, Yuanfan Li, Pengjia Yan, Shuangying Lei, Mingsong Wang, Ling Bai, Guanjun Qiao
Summary: The exploration of high-performance NO2 sensors is important for air quality monitoring and human health. This study fabricated Au-doped ZnO@ZIF-7 core-shell nanorod arrays for sensitive and selective NO2 detection. The heterostructured ZnO-Au@ZIF-7 sensor showed excellent performance in terms of sensitivity, selectivity, anti-humidity capacity, and long-term stability. This approach combining noble metals doped semiconductor metal oxides (SMOs) and MOF filtration membranes can be extended to the development of advanced chemiresistive gas sensors.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Materials Science, Multidisciplinary
Min Yang, Yan Gong, Genli Shen, Zhen Wang, Mi Liu, Qi Wang
Summary: By synthesizing and comparing the gas sensing properties of Au@ZnO, Au-Pd@ZnO, and Au-Pt@ZnO nanoparticles, it was found that the Pt/Pd decorated Au-ZnO hetero-interface has a positive influence on benzene sensing performance.
Article
Environmental Sciences
Mengmeng Zhan, Chuanxin Ge, Shahid Hussain, Ali S. Alkorbi, Raiedhah Alsaiari, Nabil A. Alhemiary, Guanjun Qiao, Guiwu Liu
Summary: Timely detection of harmful, poisonous, and air pollutant gases is crucial for protecting humans from exposure to severe gas levels. Gas-sensing devices based on sphere-like porous SnO2/ZIF-8 nanocomposites provide high surface area, porosity, and active sites for excellent responses in metal oxide gas sensors. The engineered gas sensors show excellent sensing sensitivity, rapid response and recovery times, and favorable selectivity for NO2 gases. Therefore, NO2 gas sensors based on core-shell SnO2/ZIF-8 nanospheres have promising applications in industrial settings.
Article
Chemistry, Physical
Xiaoyu Xie, Ru Wang, Yi Ma, Jinping Chen, Zengliang Shi, Qannan Cui, Zhiyong Li, Chunxiang Xu
Summary: This study presents a strategy of in situ [SO4] modification and heterojunction construction to design photoelectrodes with multicharge-transfer channels for enhanced PEC performance. The core-shell heterojunction of sulfate-functionalized CdS decorated on ZnO nanorod arrays and Ag2S nanoparticles provides active sites for accelerated charge transfer and improved PEC reaction kinetics. The addition of AO suppresses the photocorrosion of CdS and facilitates efficient separation and transportation of photogenerated charge carriers. The optimized photoanode exhibits high PEC performance, with a maximum photocurrent density 7.75 times higher than that of pristine ZnO photoanode under simulated AM 1.5 solar light illumination.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Miao Xu, Shen Wang, Shengyu Zhou, Wenhai Sun, Zhenmin Ding, Xiang Zhang, Jiupeng Zhao, Yao Li
Summary: A novel TiO2@C@Prussian Blue core-shell nanorod arrays film was constructed using hydrothermal and electrodeposition methods. This structure increased the specific surface area, reactive site and conductivity of Prussian Blue (PB), improving the storage capacity and reaction speed of ions during the electrochromic process. Additionally, the porous morphology and strong adhesion on the FTO substrate of the TiO2 nanorod arrays enhanced the cycle stability of the electrochromic device.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Yu-Sheng Tsai, Jyun-Rong Chen, Chang-Hsueh Lee, Chih-Chen Kuo, Ya-Hsuan Lin, Chun-Chieh Wang, Yu-Cheng Chang, YewChung Sermon Wu, Hsiang Chen
Summary: In this study, different types of ZnO-based nanocomposites were fabricated and characterized. The etching of ZnO nanorods increased the surface area and defect concentration, while sulfurization of the ZnO/ZnS nanotubes reduced defects and improved surface roughness. The results indicate that ZnO and ZnO/ZnS nanotubes hold promise for sensing device applications.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Yuyang Cheng, Tingting Shao, Juntang Dong, Huirong Kou, Fuchun Zhang, Jiaming Guo, Xingxing Liu
Summary: Sn@Zn MOF composites with different Sn/Zn molar ratios were synthesized by one-step solvothermal method and calcined to obtain SnO2@ZnO composites with ZnO nanoparticles grown on the surface of SnO2 quadrangular prism. The structure, morphology, and gas sensing performance of the prepared samples were investigated. The SnO2@ZnO composites exhibited a lower optimum operating temperature and higher response compared to pure SnO2.
Article
Chemistry, Inorganic & Nuclear
Lei Zhang, Baoyan Liang, He Zhao, Jiabin Yang, Mingshuai Jiao, Yunlong Liu
Summary: A core-shell structure homogeneous junction ZnO photocatalyst was prepared by calcination of Zn2(OH)2CO3 and zinc-based metal-organic framework (Zn-MOF) mixtures. The synthesized ZnO samples showed better UV light catalytic performance compared to commercially available nano-sized ZnO materials. However, the ZnO samples had poor visible-light photocatalytic performance. The presence of H2O2 accelerated the degradation of methylene blue (MB) solution in both cases.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Yuehao Fu, Hong Wang, Xiaohua Liu, Di Liu, Jiawei Wan, Shuaijun Hao, Qiang Zhang, Xingkuan Chen, Zhipeng Zen, Hong Xin
Summary: In this study, urchin-like core-shell In2O3/ZnO nanocomposites with mesoporous structure and high specific surface area were prepared via a facile solvothermal method. The sensor based on these nanocomposites showed excellent gas-sensing performance to triethylamine (TEA), attributed to the special urchin-like structure with mesoporous and high specific surface area, plentiful oxygen vacancies, and the formation of n-n heterojunction.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Sangmin Lee, Woo Seok Lee, Jae Kyung Lee, Soong Keun Hyun, Chongmu Lee, Seungbok Choi
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2018)
Article
Computer Science, Interdisciplinary Applications
Gyutae Kim, Kyu-Sung Kim, Sangmin Lee
MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING
(2018)
Article
Computer Science, Information Systems
S. I. M. M. Raton Mondol, Sangmin Lee
Article
Computer Science, Interdisciplinary Applications
Gyutae Kim, Sangmin Lee, Kyu-Sung Kim
MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING
(2020)
Article
Environmental Sciences
Gyuseok Park, Sangmin Lee
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2020)
Article
Chemistry, Multidisciplinary
Gyuseok Park, Woohyeong Cho, Kyu-Sung Kim, Sangmin Lee
APPLIED SCIENCES-BASEL
(2020)
Article
Biophysics
Yeon Wook Kim, Woo Hyeong Cho, Kyung Lim Joa, Han Young Jung, Sangmin Lee
JOURNAL OF MECHANICS IN MEDICINE AND BIOLOGY
(2020)
Article
Computer Science, Information Systems
Jiho Jeong, S. I. M. M. Raton Mondol, Yeon Wook Kim, Sangmin Lee
Summary: An effective finetuning and augmentation ASR model is proposed in this study, targeting non-standard speech of cochlear implant (CI) patients, which achieved a 62% improvement in character error rate compared to the basic method.
Article
Chemistry, Analytical
Yeon-Wook Kim, Woo-Hyeong Cho, Kyu-Sung Kim, Sangmin Lee
Summary: In this study, a state-of-the-art conformer model was introduced in human activity recognition (HAR) to improve the performance of transformer-based HAR models. The proposed conformer-based model showed better performance than baseline models and previous algorithms that do not use recurrent neural network (RNN) series.
Article
Biophysics
Yeon Wook Kim, Woo Hyeong Cho, Kyu Sung Kim, Sangmin Lee
Summary: In this study, the performance of the human activity recognition algorithm was improved by introducing an oversampling technique-based data augmentation algorithm and using a stacking ensemble model for classification. The proposed model achieved better results compared to previous studies.
JOURNAL OF MECHANICS IN MEDICINE AND BIOLOGY
(2022)
Article
Health Care Sciences & Services
S. I. M. M. Raton Mondol, Hyun Ji Kim, Kyu Sung Kim, Sangmin Lee
Summary: The novel application of a neural network technique in fitting hearing aids has been investigated in this study to minimize the discrepancy between initial fitting and optimal preference. The algorithm designed to learn individual users' hearing preferences demonstrates high efficiency, even with or without additional features. Furthermore, the results show that the algorithm outperforms the fitting software of Company A, indicating its potential for improving fitting satisfaction and benefiting the hearing-impaired community.
JOURNAL OF HEALTHCARE ENGINEERING
(2022)
Article
Chemistry, Analytical
Yeon-Wook Kim, Kyung-Lim Joa, Han-Young Jeong, Sangmin Lee
Summary: This study utilized wearable technology and deep learning algorithms to improve the evaluation performance of the Berg Balance Scale, finding the optimal model combination through testing different structures.
Proceedings Paper
Acoustics
Seongbin Kim, Gyuwan Kim, Seongjin Shin, Sangmin Lee
Summary: End-to-end approaches are proposed to improve spoken language understanding systems by utilizing textual knowledge distillation methods. The study enhances performance, especially in low-resource scenarios, through data augmentation techniques, achieving state-of-the-art accuracy on Fluent Speech Commands dataset. Empirical studies confirm the importance of all used methods in achieving optimal performance for spoken language understanding.
2021 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING (ICASSP 2021)
(2021)
Article
Computer Science, Information Systems
Sang-Ick Kang, Seongbin Kim, Sangmin Lee
JOURNAL OF INTERNET TECHNOLOGY
(2020)
Article
Computer Science, Software Engineering
Yuyong Jeon, Ilkyeun Ra, Youngjin Park, Sangmin Lee
JOURNAL OF UNIVERSAL COMPUTER SCIENCE
(2018)
