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
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
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
Nanoscience & Nanotechnology
Baoye Zi, Mingpeng Chen, Qin Zhu, Qingjie Lu, Bin Xiao, Zongming Deng, Dong Xu, Zhenlin Song, Jianhong Zhao, Yumin Zhang, Zhongqi Zhu, Jin Zhang, Qingju Liu
Summary: Sensitive and stable triethylamine (TEA) gas sensors based on a core-shell heterostructure comprising CuO and amorphous In2O3/ZnO (CuInZnO) were fabricated via a facile electrodeposition method. The optimized gas sensor (CuInZnO-3) showed outstanding gas response, selectivity, linear response, and stability towards 10 ppm TEA at room temperature due to the unique core-shell nanorod heterostructure with a high specific surface area and the amorphous nature of the In2O3/ZnO shell.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Orhan Sisman, Dario Zappa, Valentin-Adrian Maraloiu, Elisabetta Comini
Summary: The study proposes an inverse design by depositing n-type ZnO shell layers on the surface of p-type CuO core-shell nanowires to understand their conductometric gas-sensing kinetics. The surface morphologies of bare and core-shell nanowires were investigated using FE-SEM. The ZnO shell layer was observed using EDX and HRTEM techniques. The deposition of ZnO shell layers switched the intrinsic p-type sensing behavior of CuO nanowires towards hydrogen to n-type.
Article
Chemistry, Analytical
Dong Jae Yu, Wansik Oum, Ali Mirzaei, Ka Yoon Shin, Eun Bi Kim, Hyeong Min Kim, Sang Sub Kim, Hyoun Woo Kim
Summary: We synthesized pristine SnO2 nanoparticles and Au@SnO2 core-shell nanocomposites for xylene gas sensing. The Au@SnO2 core-shell nanocomposites showed better response and selectivity compared to the pristine SnO2 nanoparticles, demonstrating the promising effects of the Au@SnO2 core-shell structure for xylene sensing.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Q. A. Drmosh, Yousif Ahmed Al Wajih, Ibrahim Olanrewaju Alade, A. K. Mohamedkhair, Mohammad Qamar, Abbas Saeed Hakeem, Z. H. Yamani
Summary: A new approach to improve the performance of acetone gas sensors by engineering the depletion layer using Au decorated ZnO/Ag core-shell films has been developed. The findings demonstrate that controlled engineering of the depletion layer is an effective method for designing high-performance metal oxide-based gas sensors.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Hong Wang, Yuanyuan Luo, Bo Liu, Lei Gao, Guotao Duan
Summary: ZnO@CuO hierarchical heterostructures were prepared through template-assisted magnetron sputtering and annealing, showing sensitive and recoverable detection of H2S gas at low temperature. The structure exhibits enhanced sensing response and short response/recovery time, making it a promising platform for high-performance gas sensors.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
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
Chemistry, Analytical
Ka Yoon Shin, Ali Mirzaei, Ha Young Lee, Jae Hoon Bang, Wansik Oum, Eun Bi Kim, Hyeong Min Kim, Sanjit Manohar Majhi, Sang Sub Kim, Hyoun Woo Kim
Summary: A core@shell nanograined Ag-Co3O4 structure was developed for the detection of xylene. This structure exhibited high sensitivity and selectivity, and operated at a lower temperature compared to the pristine sensor. The study demonstrates the potential of this material for xylene sensing applications.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Lifang He, Jingjie Hu, Qiming Yuan, Zhangcheng Xia, Ling Jin, Hongliang Gao, Liyuan Fan, Xiangfeng Chu, Fanli Meng
Summary: Constructing porous and heterojunction structures within the semiconductor oxide composites is an ideal strategy for developing gas sensing materials, but it is difficult due to grain boundaries. In this study, ZnFe2O4/SnO2 (ZFO/SNO) composite with porous core-shell spheres structure was successfully synthesized by combining pre-synthesized SnO2 nanospheres with ZnFe2O4. The porous ZFO/SNO composite with a Zn to Sn ratio of 1:0.7 showed excellent acetone sensing performance, attributed to its rich heterojunctions, porous structure, and small nanoparticle size.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Ming Zhang, Ning Sui, Rui Wang, Tong Zhang
Summary: The gas-sensitive performance of Cr2O3-TiO2 core-shell fibers was enhanced by optimizing the thickness of TiO2 shell. The response of the fibers to acetone transitioned from p-type to n-type with increasing TiO2 shell thickness. The formation of Cr2O3-TiO2 heterojunction enabled the gas sensors to have short response and recovery time to the target gas.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Physical
D. Simon Patrick, A. Govind, P. Bharathi, M. Krishna Mohan, S. Harish, J. Archana, M. Navaneethan
Summary: In this study, ZnO/g-C3N4 nanocomposites were synthesized using a simple hydrothermal method, and their properties were analyzed using various characterization techniques. The results show that the addition of 30% g-C3N4 significantly improves the response rate and rapid response and recovery time of the ZnO nanocomposite at 180 degrees Celsius.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Cheng-Liang Hsu, En-Cheng Chang, Han-Ting Hsueh, Yi-Hung Liu
Summary: The study successfully synthesized n-ZnO/p-CuMnO2 core-shell nanowires by solution method, exhibiting good rectification and ultra-low leakage properties, as well as sensitivity and rapid response to organic gases and light of different wavelengths.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Analytical
Zhenhua Li, Sijia Li, Zijian Song, Xueli Yang, Ziyan Wang, Hao Zhang, Lanlan Guo, Caixuan Sun, Hongyan Liu, Junkai Shao, Yehong Cheng, Guofeng Pan
Summary: In this study, Ni-doped ZnO sensitive materials with a core-shell morphology were synthesized for the detection of toluene gas. The materials exhibited excellent sensing performance, including high selectivity, fast response/recovery characteristics, and low detection limit. Various characterization methods were employed to analyze the sensitive materials.
Article
Nanoscience & Nanotechnology
Akash Katoch, Zain Ul Abideen, Hyoun Woo Kim, Sang Sub Kim
ACS APPLIED MATERIALS & INTERFACES
(2016)
Article
Chemistry, Analytical
Dolly Rana, Deepika Jamwal, Akash Katoch, Pankaj Thakur, Susheel Kalia
Article
Chemistry, Multidisciplinary
Jae-Hun Kim, Akash Katoch, Hyoun Woo Kim, Sang Sub Kim
CHEMICAL COMMUNICATIONS
(2016)
Article
Chemistry, Multidisciplinary
Jun-Seong Lee, Akash Katoch, Jae-Hun Kim, Sang Sub Kim
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
(2016)
Article
Materials Science, Multidisciplinary
Akash Katoch, Zain Ul Abideen, Jae-Hun Kim, Sang Sub Kim
METALS AND MATERIALS INTERNATIONAL
(2016)
Article
Chemistry, Analytical
Jun-Seong Lee, Akash Katoch, Jae-Hun Kim, Sang Sub Kim
SENSORS AND ACTUATORS B-CHEMICAL
(2016)
Article
Nanoscience & Nanotechnology
Jae Young Park, Ho-hyoung Kim, Dolly Rana, Deepika Jamwal, Akash Katoch
Article
Materials Science, Multidisciplinary
Monu Verma, Vinod Kumar, Akash Katoch
MATERIALS CHEMISTRY AND PHYSICS
(2018)
Article
Engineering, Electrical & Electronic
Monu Verma, Vinod Kumar, Akash Katoch
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2018)
Article
Optics
Chirag Malik, Akash Katoch, Birendra Singh, Anant Pandey
JOURNAL OF LUMINESCENCE
(2019)
Article
Engineering, Electrical & Electronic
Deepika Jamwal, Dolly Rana, Ashish Soni, Meenakshi Dudi, Ahmad Umar, Pranjala Tiwari, Akash Katoch, Surinder Kumar Mehta
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2019)
Article
Chemistry, Multidisciplinary
Dolly Rana, Deepika Jamwal, Sang Sub Kim, Akash Katoch, Pankaj Thakur, Jae Young Park
Article
Materials Science, Multidisciplinary
Minsu Lee, Hohyeong Kim, Hyungsub Kim, Akash Katoch, Jae Young Park
Summary: This study investigated the effect of the mixing ratio of TiO2 nanoparticles (P25) and titanium alkoxide (T-sol) on various properties of TiO2 films. The specific surface area, microstructure, thickness, transmittance, pencil hardness, and oil contact angle of the films were analyzed. The results showed that the specific surface area increased as the P25 content increased, but this effect decreased as the ratio of T-sol to P25 increased. The thickness, surface roughness, transmittance, pencil hardness, and oil contact angle of the films were also affected by the P25 content, with increased thickness and surface roughness, decreased transmittance and pencil hardness, and decreased oil contact angle.
Article
Nanoscience & Nanotechnology
Dolly Rana, Ashish Soni, Anita Sharma, Akash Katoch, Deepika Jamwal
NANO HYBRIDS AND COMPOSITES
(2018)
Proceedings Paper
Physics, Condensed Matter
Chirag Malik, A. Pandey, Akash Katoch, S. P. Lochab, Birendra Singh
61ST DAE-SOLID STATE PHYSICS SYMPOSIUM
(2017)