Article
Chemistry, Multidisciplinary
Yijun Yang, Bohee Maeng, Dong Geon Jung, Junyeop Lee, Yeongsam Kim, JinBeom Kwon, Hee Kyung An, Daewoong Jung
Summary: The study focuses on the performance of SnO2 thin film sensors for H-2 gas, revealing that annealed films exhibit higher response and shorter response time.
Article
Chemistry, Physical
Xin-Yue Zhang, Qiang Ren, Chen Wang, Lin Zhu, Wen-Juan Ding, Yan-Qiang Cao, Wei-Ming Li, Di Wu, Ai-Dong Li
Summary: In this study, SnO2, ZnO thin film, and SnO2/ZnO composite thin film hydrogen sensors were fabricated using atomic layer deposition (ALD). The effects of ALD cycles and heat treatment temperatures on the sensing properties were investigated. The SnO2/ZnO composite film sensor exhibited the best hydrogen-sensing performance, attributed to the synergistic effect of the SnO2-ZnO heterojunction and oxygen vacancies in the SnO2 film. ALD may be a feasible strategy for constructing highly sensitive hydrogen sensors based on Si for micro-electromechanical system applications.
APPLIED SURFACE SCIENCE
(2023)
Article
Materials Science, Multidisciplinary
Swapnali B. Dhage, Vithoba L. Patil, Pramod S. Patil, Jungho Ryu, Deepak R. Patil, Yuvraj S. Malghe
Summary: CuO-SnO2 nanocomposites were successfully synthesized and studied for their potential as CO gas sensors. The thermal stability and gas sensitivity of the nanocomposites were confirmed, showing excellent repeatability and sensitivity towards CO gas. The XRD results indicated pure phase formation of CuO-SnO2 heterostructure with a band-gap of 2.63 eV.
Article
Chemistry, Analytical
Victor V. Petrov, Victor V. Sysoev, Aleksandra P. Starnikova, Maria G. Volkova, Zamir Kh. Kalazhokov, Viktoriya Yu. Storozhenko, Soslan A. Khubezhov, Ekaterina M. Bayan
Summary: A thin nanocomposite film composed of ZnO and SnO2 was successfully synthesized through a new solid-phase low-temperature pyrolysis method at concentrations of 0.5-5 mol.%. The film was found to have a poly-nanocrystal structure of ZnO and SnO2 crystals with characteristic grain sizes in the range of 10-15 nm. Furthermore, when comparing the chemiresistive response of the films with varied tin dioxide content, it was observed that the sample with an Sn:Zn optimal ratio of 1:99 showed a 1.5-fold improvement in response to 5-50 ppm NO2 exposure.
Article
Chemistry, Analytical
Sihang Lu, Yuzhu Zhang, Jingyao Liu, Hua-Yao Li, Zhixiang Hu, Xie Luo, Naibo Gao, Bao Zhang, Jianjun Jiang, Aihua Zhong, Jingting Luo, Huan Liu
Summary: Highly sensitive H-2 gas sensors based on porous network of SnO2 nanowires were demonstrated in this study, with improved performance and shortened response/recovery time after Pd doping. The superb sensitivity of the sensor was credited to the ultrathin SnO2 nanowires network structure and the catalytic activity of Pd.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Guillem Domenech-Gil, Jordi Sama, Cristian Fabrega, Isabel Gracia, Carles Cane, Sven Barth, Albert Romano-Rodriguez
Summary: We present a methodology for localized growth of nanowires on micro-hotplates that allows independent adjustment of the device's resistance and gas response. Fabrication of nanowire-containing stripes with or without gaps enables nanowires to bridge current, and we demonstrate this approach with SnO2 nanowire-based chemoresistors. The results show the capability of tailoring nanowire stripe sizes and empty areas along the sensing material, resulting in up to 500 times response increase. The absence of nucleation seeds in the gap areas restricts current flow along the nanowire bridges, enhancing surface conduction controlled by nanowire-gas interaction.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Physical
Q. N. Abdullah, A. R. Ahmed, A. M. Ali, F. K. Yam, Z. Hassan, M. Bououdina
Summary: Nanostructured beta-Ga2O3 nanobelts were successfully fabricated using a thermal evaporation method, and a sol-gel processed SnO2 layer was deposited to modify the functionality of gallium oxide. The sensing characteristics of SnO2-functionalized beta-Ga2O3 nanobelts towards analyte gas H2 were found to be greatly improved within a certain concentration range.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Nanoscience & Nanotechnology
Ramarajan Ramanathan, Selvakumar Nagarajan, Venkataramana Bonu, Priyanka Patel, Shubhangi Jamdar, Harish C. Barshilia, Ramesh Chandra Mallik
Summary: Thin film technology offers possibilities and advancements in gas sensor devices. Sb-doped nanometer thin-SnO2 films were developed for CO/NH3 gas detection. The structural, surface, optical, and resistivity properties were investigated as a function of film thickness. ATO thin films showed enhanced response towards CO/NH3 gas detection with better stability and selectivity for CO gas. The results indicate the potential application of nanometer ATO films for enhanced gas detection.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Analytical
Guodong Li, Yanbai Shen, Sikai Zhao, Ang Li, Shuling Gao, Dezhou Wei, Zhenyu Yuan, Fanli Meng, Dan Meng
Summary: This study successfully reduced the operating temperature and improved moisture resistance of H2 sensors by using PtSnx modified rGO-SnO2 nanocomposites. The nanocomposites exhibited ppm-level H2 sensing performance at 175°C and showed good moisture resistance, reproducibility, and long-term stability. The research suggests that PtSnx-rGO-SnO2 nanocomposites may be a promising material for high-performance H2 detection.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Materials Science, Ceramics
Xi-Tao Yin, Zhi-Yu Yang, Davoud Dastan, Ying Liu, Xiao-Ming Tan, Xiao-Chun Gao, Yan-Wen Zhou, Jing Li, Xiao-Guang Ma
Summary: In this study, Pt loaded SnO2-Co3O4 composite was successfully fabricated using a hydrothermal method and applied to gas sensing for the first time. The results showed that the composite exhibited significantly improved response and response time to hydrogen gas compared to pristine SnO2. Additionally, the material also demonstrated excellent sensing performance including selectivity for detecting H2 gas. The improved sensing properties were attributed to the synergistic effect of the spillover effect of Pt element and the formation of p-n junction.
CERAMICS INTERNATIONAL
(2023)
Article
Biochemistry & Molecular Biology
Bin Fan, Jing-Ru Zhang, Jia-Liang Chen, Ze-Tao Yang, Bin Li, Lin Wang, Mai Ye, Lu-Lu Zhang
Summary: In this study, three types of nanosized SnO2 samples were synthesized and characterized. The sample calcined at 600 degrees C showed the highest response to H2S gas due to the presence of a higher amount of chemisorbed oxygen. The study also revealed the mechanism of H2S oxidation on the SnO2 surface.
Article
Chemistry, Physical
Xin Tian, Huitong Cao, Hairong Wang, Jiuhong Wang, Xueyong Wei, Xinyu Wu
Summary: A facile acid vapor oxidation method has been developed for the synthesis of highly round SnO2 nanospheres from metal Sn thin films. The as-obtained nanospheres exhibit ultrahigh sensitivity to ethanol gas, making them promising candidates for high performance chemical sensors.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Xin Tian, Zonxin Hu, Tian Wang, Hairong Wang, Qunming Zhang, Xueyong Wei
Summary: The fabrication of multi-layer TiO2/SnO2 heterojunctions sensing film using sputtering techniques and its gas sensing properties were investigated. The two-layer TiO2/SnO2 heterojunctions sensing film annealed at 400 degrees C exhibited the best gas sensing performances, with a response value of 7.54 and response/recovery time of 33/298 s to 50 ppm ethanol at 260 degrees C. The MEMS gas sensor based on this sensing film showed excellent linearity in detecting ethanol ranging from 1 ppm to 1000 ppm.
Article
Chemistry, Multidisciplinary
Yuan-Chang Liang, Yu-Wei Hsu
Summary: In this study, a two-layered thin-film structure consisting of a dispersed nanoscaled Ag2O phase and SnO2 layer (SA) and a mono-composite film layer (CSA) consisting of a nanoscale Ag2O phase in the SnO2 matrix were designed and fabricated for NO2 gas sensor applications. Both SA and CSA thin films exhibited enhanced gas-sensing responses toward low-concentration NO2 gas.
NANOTECHNOLOGY REVIEWS
(2022)
Article
Chemistry, Analytical
Sang-Hoon Kim, Kwang-Seok Yun
Summary: This paper presents a sensitive Pd gas sensor with a NiCo2O4 nanoneedle forest (NNF) for the detection of hydrogen (H2). The Pd film on NiCo2O4 NNF maximized the reactive surface area with H2, resulting in excellent sensitivity and response speed. Integrated with a temperature sensor and heater using MEMS processes, the sensor's sensitivity and response speed can be adjusted by controlling the operating temperature. The proposed sensor exhibited fast response and recovery times at both room temperature (RT) and 300°C, with linear response and high sensitivity at RT and faster response at higher temperatures. The sensor can be utilized as a low-power, high-sensitivity sensor at RT or as a fast-response sensor at elevated temperatures using an integrated heater.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Physics, Multidisciplinary
A. A. Hunanyan, M. A. Aghamalyan, V. M. Aroutiounian, H. A. Zakaryan
JOURNAL OF CONTEMPORARY PHYSICS-ARMENIAN ACADEMY OF SCIENCES
(2019)
Article
Physics, Multidisciplinary
M. S. Aleksanyan, A. G. Sayunts, H. A. Zakaryan, V. M. Aroutiounian, V. M. Arakelyan, G. E. Shahnazaryan
JOURNAL OF CONTEMPORARY PHYSICS-ARMENIAN ACADEMY OF SCIENCES
(2020)
Article
Physics, Multidisciplinary
M. A. Aghamalyan, A. A. Hunanyan, V. M. Aroutiounian, M. S. Aleksanyan, A. G. Sayunts, H. A. Zakaryan
JOURNAL OF CONTEMPORARY PHYSICS-ARMENIAN ACADEMY OF SCIENCES
(2020)
Article
Physics, Multidisciplinary
V. M. Aroutiounian
JOURNAL OF CONTEMPORARY PHYSICS-ARMENIAN ACADEMY OF SCIENCES
(2020)
Article
Physics, Multidisciplinary
V. M. Aroutiounian
Summary: This review discusses the results of studies on various types of semiconductor H2O2 sensors including electrochemical detectors, sensors based on organic and inorganic materials, graphene, and nano-sensors. It also briefly touches upon optical and fluorescent sensors, detectors made of porous materials, quantum dots, fibers, and spheres. Additionally, it presents research on hydrogen peroxide sensors made from solid solutions of carbon nanotubes with semiconducting metal oxides and the manufacture of biomarkers of respiration containing hydrogen peroxide vapors for assessing respiratory diseases.
JOURNAL OF CONTEMPORARY PHYSICS-ARMENIAN ACADEMY OF SCIENCES
(2021)
Article
Physics, Multidisciplinary
M. S. Aleksanyan, A. G. Sayunts, G. H. Shahkhatuni, V. M. Aroutiounian, G. E. Shahnazaryan
Summary: The morphology and gas sensing characteristics of Fe2O3:ZnO film were investigated, showing sensitivity to ammonia vapors at 250 degrees C with a low detection limit. The parameters of the Fe2O3:ZnO-based sensor are enhanced, allowing for potential use in ammonia detecting devices.
JOURNAL OF CONTEMPORARY PHYSICS-ARMENIAN ACADEMY OF SCIENCES
(2021)
Article
Chemistry, Physical
Areg A. Hunanyan, Vladimir M. Aroutiounian, Hayk A. Zakaryan
Summary: This study employed an evolutionary structure prediction algorithm and ab initio approaches to search for new two-dimensional tin oxide materials. The results reveal the discovery of a novel and dynamically stable structure, Sn2O3, which shows potential for gas sensing and catalyzing applications. The stability and thermodynamic phase diagram of SnO2 and SnO were also investigated.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Physics, Multidisciplinary
M. S. Aleksanyan, A. G. Sayunts, V. M. Aroutiounian, G. E. Shahnazaryan, G. H. Shahkhatuni
Summary: A sensor sensitive to acetone vapors based on Fe(2)O(3)kSnl solid solution was fabricated and showed sensitivity starting from 150 degrees C under UV light. The sensor's response increased linearly with operating temperature, and exposure to UV light improved both sensitivity and performance. This sensor can be used successfully in acetone detectors.
JOURNAL OF CONTEMPORARY PHYSICS-ARMENIAN ACADEMY OF SCIENCES
(2021)
Article
Physics, Multidisciplinary
M. S. Aleksanyan, A. G. Sayunts, G. H. Shahkhatuni, G. E. Shahnazaryan, V. M. Aroutiounian
Summary: The technology developed enables the manufacturing of a thin-film nanoscale resistive sensor that is sensitive to LPG concentrations, with an operating temperature of 250 degrees C. The SnO2kNbl sensor shows high sensitivity, operation speed, and repeatability to LPG when exposed to ultraviolet radiation.
JOURNAL OF CONTEMPORARY PHYSICS-ARMENIAN ACADEMY OF SCIENCES
(2021)
Article
Physics, Multidisciplinary
V. M. Aroutiounian
Summary: The paper discusses the research on non-invasive metal oxide sensors for detecting acetone exhaled by diabetics, conducted at Yerevan State University and abroad. It presents the technologies and parameters of chemiresistors based on various metal oxides developed globally. The study suggests starting investigations with a 1 ppm acetone concentration and exploring the relationship between non-invasive metal oxide sensors and diabetes.
JOURNAL OF CONTEMPORARY PHYSICS-ARMENIAN ACADEMY OF SCIENCES
(2021)
Article
Physics, Multidisciplinary
K. M. Gambaryan, V. M. Aroutiounian
Summary: The study presents the results of characterization and numerical analysis of strain-induced micro- and nanostructure shape transition in InAsSbP composition. It shows the succession of shape transitions as the islands volume decreases, from truncated pyramid to hemisphere and then to pyramidal quantum dots, with experimental and theoretical evaluation of critical sizes detected. The theoretically calculated values coincide with experimentally obtained data.
JOURNAL OF CONTEMPORARY PHYSICS-ARMENIAN ACADEMY OF SCIENCES
(2021)
Article
Physics, Multidisciplinary
V. M. Aroutiounian
JOURNAL OF CONTEMPORARY PHYSICS-ARMENIAN ACADEMY OF SCIENCES
(2020)
Article
Physics, Multidisciplinary
K. M. Gambaryan, A. K. Simonyan, V. M. Aroutiounian, M. K. Gambaryan
JOURNAL OF CONTEMPORARY PHYSICS-ARMENIAN ACADEMY OF SCIENCES
(2020)
Article
Physics, Multidisciplinary
M. S. Aleksanyan, A. G. Sayunts, A. A. Zakaryan, V. M. Aroutiounian, V. M. Arakelyan, G. E. Shakhnazaryan
JOURNAL OF CONTEMPORARY PHYSICS-ARMENIAN ACADEMY OF SCIENCES
(2020)
Article
Physics, Multidisciplinary
H. L. Margaryan, V. K. Abrahamyan, N. H. Hakobyan, V. M. Aroutiounian, P. K. Gasparyan, V. V. Belyaev, A. S. Solomatin, D. N. Chausov
JOURNAL OF CONTEMPORARY PHYSICS-ARMENIAN ACADEMY OF SCIENCES
(2019)
