Article
Chemistry, Physical
Jiarui Huang, Chunyu Meng, Hui Wang, Haibo Ren, Xiaojing Lu, Sang Woo Joo
Summary: In this study, cross-linked porous tin dioxide nanosheets were successfully synthesized using three-dimensional reduced graphene oxide as a template. The resulting nanosheets exhibited high sensitivity to toxic organic vapors, making them promising candidates for practical detectors of volatile organic compounds.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Analytical
Hai Liu, Tingting Zhao, Lingwei Kong, Xun Cao, Wenhuan Zhu, Yizhong Huang, Maolin Bo
Summary: This study comparatively examines twinned CuCrO2 nanoparticles in gaseous chemiresistive property, exploring the contribution of twin boundaries to the charge transfer and activity of Cu atoms, paving a new way for insightful acquisition of nanotwins in gas detection applications.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Engineering, Electrical & Electronic
Zong-Mu Dong, Qian Xia, Xiaojing Lu, Jiarui Huang, Sang Woo Joo
Summary: In2O3 octahedrons with unique morphology and high crystallinity were obtained through a freeze-drying process and calcination treatment, and they exhibited superior sensing performance for volatile organic compounds detection.
IEEE SENSORS JOURNAL
(2022)
Article
Chemistry, Analytical
Haibo Ren, Huaipeng Weng, Xumeng Dong, Jiarui Huang, Sang Woo Joo
Summary: Porous sea urchin-like nickel-doped ZnO with various nickel contents were synthesized and showed superior sensing performance for VOCs. The 10% Ni-doped ZnO sea urchin sensor exhibited a high response of 84.4 and short response/recovery times for formaldehyde vapor. These superior sensing behaviors were attributed to suitable Ni content, high oxygen defects, small nanocrystals, and a porous hierarchical structure with high specific surface area.
Article
Engineering, Environmental
Mahan Ghazi, Sajjad Janfaza, Hamed Tahmooressi, Nishat Tasnim, Mina Hoorfar
Summary: This study focuses on improving the selectivity of microfluidic gas sensors for detecting a range of VOCs by adding micro- and nanofeatures to the microchannel. The results show an average improvement of 64.4% and 120.9% in sensor selectivity with microfeatures and both nano- and microfeatures, respectively. Characterization of the nano- and microfeatures was done through SEM, XPS, and water contact angle measurement.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Chemical
Guizhou Wu, Junfeng Wu, Juan Dong, Xinyu Zhang
Summary: A stacked MEMS sensor was designed in this study, using porphyrin-sensitive materials and carbon nanotubes to improve the thermal stability of sensitive materials. The sensor demonstrated lower power consumption, more uniform temperature distribution, and excellent response recovery characteristics, effectively detecting four gases including aniline and formaldehyde.
Article
Materials Science, Ceramics
Riya Alice B. John, Julakanti Shruthi, M. V. Ramana Reddy, A. Ruban Kumar
Summary: The current investigation focuses on the synthesis of surface-modified Nickel Oxide (NiO) nanoparticles with excellent sensing properties for Formaldehyde (HCHO) gases by doping with Manganese (Mn) and varying the sintering temperature. The research reveals the presence of Mn ions in the Mn-doped NiO nanostructures and the superiority of the Mn-doped NiO nanospheres sintered at 500 degrees C in terms of gas sensing performance.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Snehanjan Acharyya, Plaban Kumar Bhowmick, Prasanta Kumar Guha
Summary: Accurate and selective detection of target gas/volatile organic compounds (VOCs) is achieved through a combination of nanomaterials-based chemiresistive gas sensors and machine learning techniques. The use of different metal nanoparticles for surface decoration leads to sensitive and diverse sensing patterns among VOCs. The application of machine learning models, particularly a deep neural network model with time series response sequence, enables qualitative and quantitative detection of VOCs with high accuracy and fast prediction time.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Analytical
Haoyu Zhang, Tingting Zhao, Wenhuan Zhu, Lingwei Kong, Yizhong Huang, Hai Liu
Summary: This paper reports a novel ionization gas sensor assembled by CuO nanowires coated with a thin layer of aluminum. The sensor can discharge volatile organic compounds at ppm level at an ultralow ionization voltage with high stability. It can identify typical organic gases and detect the concentration of isopropanol gas as low as 5 ppm.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Chemistry, Analytical
Shivangi Srivastava, Ajeet Singh, Mohammad A. Sahz, Bal Chandra Yadav, Narendra Kumar Pandey
Summary: A room temperature operated V2O5 nanorods-decorated graphene oxide (GO) nanosheets-nanocomposite chemiresistor has been developed for detecting low-trace of toluene. The sensor shows high response and rapid response and recovery time, as well as good selectivity and stability.
SENSORS AND ACTUATORS B-CHEMICAL
(2024)
Review
Chemistry, Applied
Kewei Liu, Chao Zhang
Summary: This review article provides an overview of gas sensors based on quartz crystal microbalance for fruit freshness detection, focusing mainly on research on respiration climacteric fruits and discussing the sensitive materials based on physical/chemical adsorption mechanisms. The characteristics of fruits' respiratory intensity at the stage of ripening are considered for dividing fruits into respiration climacteric and non-climacteric categories.
Article
Engineering, Electrical & Electronic
Joao Paulo de Campos da Costa, Leonelio Cichetto Junior, Estacio Paiva de Araujo, Adryelle do Nascimento Arantes, Elson Longo, Adenilson Jose Chiquito, Joao Paulo Carmo
Summary: This article presents the development of a VOC gas sensor based on a PCB multiplexed IDE sensor, highlighting the use of graphite as a sensing material and describing the design and manufacturing of the sensors. Acetone exhibited the highest detection sensitivity, and the sensors maintained stability and repeatability after six months of evaluation.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Environmental
Delin Kuang, Ling Wang, Xuezheng Guo, Yin She, Bingsheng Du, Chengyao Liang, Weijie Qu, Xia Sun, Zhilin Wu, Wei Hu, Yong He
Summary: This study demonstrates a room-temperature VOC gas sensor based on Ti3C2Tx-TiO2 nanocomposites, showing enhanced responses compared to pure MXene sensor, especially in the detection of hexanal gas, indicating promising application prospects.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Wentao Li, Xuyang Li, Yu Zong, Lingwei Kong, Wenhuan Zhu, Min Xu, Hai Liu
Summary: In this study, a new n-propanol gas sensor with an ultralow detection limit of 100 ppb was developed using AgCrO2 nanoparticles synthesized by a simple hydrothermal method. Compared to CuCrO2 and commercial SnO2, AgCrO2 demonstrated superior selectivity, dynamic response, and logarithmical linearity, along with a lower working temperature. The sensing mechanism was elucidated through first-principles calculation and energy band theoretical analysis, indicating that the outstanding susceptibility of AgCrO2 towards n-propanol is attributed to the chemical adsorption of gaseous molecules to silver followed by dehydrogenation on chromium on the AgCrO2 surface. The proposed metal oxide semiconductor gas sensor provides a pathway for the advanced trace detection of volatile organic compounds.
Article
Chemistry, Physical
Haibo Ren, Huaipeng Weng, Jiarui Huang, Xiaojing Lu, Sang Woo Joo
Summary: Au nanoparticle-modified porous TiO2 nanospheres were prepared and investigated for sensing various organic vapors. The results showed that the nanospheres exhibited high responses to formaldehyde, acetone, ethanol, and isopropanol, and had short response/recovery times for acetone vapor.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Honggyun Kim, Jamal Aziz, Vijay D. Chavan, Deok-kee Kim
Summary: Silicon nitride films were prepared using plasma enhanced chemical vapor deposition with different trap densities induced by adjusting the RF power ratio. It was found that the film's trap density was lowest under compressive stress and increased under tensile stress. This study has significant implications for the formation of durable nitride films in various electronic and optoelectronic applications.
CURRENT APPLIED PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Qiang Yu, Huwei Zhao, Yue Zhao
Summary: Zinc oxide thin films and Al-doped zinc oxide films were prepared and characterized in this study. The addition of Al ions was found to change the growth orientation, increase the grain size, and enhance the absorption intensity in the visible light region. Furthermore, the addition of Al ions also increased the forward current in the heterojunction.
CURRENT APPLIED PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Sang Woo Lee, Min Sun Park, Sangwon Wi, So Yeon Lim, Yeseul Lee, Jin-Seok Chung, Sang Mo Yang
Summary: In this study, we investigated the dynamics of domain switching in pristine and fatigued BiFeO3 capacitors through experimental observations and measurements. The results showed that the switching in the pristine capacitors was dominantly driven by domain growth, while the fatigued capacitors exhibited two different switching dynamics, in which nucleation played a critical role.
CURRENT APPLIED PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Boshi Wang, Tianyi Wang, Yufang Liu, Kun Yu
Summary: In this paper, a tunable and anisotropic perfect absorber composed of anisotropic black phosphorus (BP) and isotropic graphene is proposed. The structure exhibits high absorption and strong anisotropic plasma response. The resonance characteristics can be effectively controlled by adjusting geometric parameters and doping levels, offering potential applications.
CURRENT APPLIED PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Xiaolan Liu, Chunyang Li, Tonghui Yang, Naiqiang Yin, Gangling Zhao
Summary: Water drop triboelectric nanogenerators (WD-TENGs) can harvest energy from raindrops and improve the output performance of TENGs.
CURRENT APPLIED PHYSICS
(2024)