Article
Chemistry, Analytical
B. M. Babar, K. B. Pisal, S. H. Mujawar, V. L. Patil, L. D. Kadam, U. T. Pawar, P. M. Kadam, P. S. Patil
Summary: Vanadium Oxide (V2O5) nanostructures were prepared by a hydrothermal method and the effect of concentration variation on gas sensing performance was studied. The sample prepared with 0.3 M concentration showed the best response with good sensing features, making it a potential candidate for gas sensor fabrication.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Biochemistry & Molecular Biology
Jiahui Guo, Weiwei Li, Xuanliang Zhao, Haowen Hu, Min Wang, Yi Luo, Dan Xie, Yingjiu Zhang, Hongwei Zhu
Summary: In this study, SnO2/ZnO nanocomposites were successfully synthesized and their gas sensing properties were investigated at room temperature, showing high sensitivity and selectivity to 0.5 ppm NO2 gas. Additionally, a flexible wearable sensor array integrated with patterned silver electrodes and SnO2/ZnO was fabricated, capable of detecting 0.1 ppm NO2 gas after 10,000 bending cycles, demonstrating a general approach for the fabrication of flexible devices for gas detection applications.
Article
Chemistry, Analytical
Inyalot Jude Tadeo, Rajasekar Parasuraman, Arun M. Umarji
Summary: The article introduces the synthesis, characterization, and gas sensing properties of V2O5 thin films prepared at different temperatures using ultrasonic nebulization. The V2O5-Qu-350 thin films exhibited the highest response towards ethanol and NO2, showing potential for detecting these gases in various environments.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Amit Kumar Shringi, Amit Kumar, Maloy Das, Sang Sub Kim, Hyoun Woo Kim, Mahesh Kumar
Summary: Novel metal functionalization of semiconductor metal oxide surfaces can effectively improve the selectivity and sensitivity of gas sensors. In this study, the functionalization of α-Fe2O3 sensor with silver nanoparticles enhanced its sensing performance for NO2 molecules, resulting in a higher relative response rate.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Analytical
Bharat Sharma, Ashutosh Sharma, Jae-ha Myung
Summary: This paper demonstrated a hybrid SnO2-BNNTs sensor for trace ppb-level NO2 detection, with a low detection limit and better sensor response than the SnO2 sensor. The sensing characteristics of the sensor were studied, including response, repeatability, stability, and response-recovery time. The increased space charge depleted regions at the p-n heterojunction promoted a tunneling effect and provided conducting channels through BNNTs for an improved sensor response.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Physical
Myung Sik Choi, Min Young Kim, Ali Mirzaei, Hyun-Sik Kim, Sang-il Kim, Seung-Hyub Baek, Dong Won Chun, Changhyun Jin, Kyu Hyoung Lee
Summary: Porous ZnO nanosheets were synthesized using a solvothermal method for high sensitivity detection of NO2 gas, showing high selectivity and stability. Enhanced response was attributed to the synergetic effects of high surface area, ZnO/ZnO homojunctions, and structural defects.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Sanju Rani, Manoj Kumar, Hardhyan Sheoran, R. Singh, Vidya Nand Singh
Summary: This study presents the first experimental report on SnSe-based gas sensors, showing that SnSe nanostructured film exhibits good selectivity and sensitivity towards NO2, therefore opening up a new dimension for the development of selective gas sensor materials.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Atul Kumar, Anil Kumar, G. D. Varma
Summary: The present study introduces energy efficient and humidity tolerant nanohybrids, based on gamma-Fe2O3-rGO, for NO2 gas sensing at room temperature. The nanohybrids exhibit a p-n heterojunction at the interface between gamma-Fe2O3 and rGO, creating oxygen vacancies in gamma-Fe2O3 which enhance the sensing ability. The sensor operates at low voltage, displays high selectivity for NO2 gas, and maintains stability in a wide range of humidity conditions.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Materials Science, Ceramics
Ahmad Umar, Ahmed A. Ibrahim, Hassan Algadi, Hasan Albargi, Mabkhoot A. Alsairi, Yao Wang, Sheikh Akbar
Summary: A successful synthesis of PANI/Ag2O/GO composite for enhanced NO2 gas sensing application was reported. The composite exhibited high sensitivity and was tested at different temperatures to achieve optimal sensing temperature and sensitivity.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
S. C. Kulkarni, Krishna D. Bhalerao, Sayantra Shirse, Yogesh T. Nakate, Umesh T. Nakate, Bidhan Pandit, M. A. Yewale
Summary: The pristine and various mole% (1, 3, 5, 7, and 9) Zn-doped In2O3 nanocrystalline materials were successfully prepared using sol-gel and screen-printing thick film methods. The 7% mole Zn doped In2O3 sensor showed superior gas sensing properties and excellent selectivity towards NO2 gas compared to other doped and pure In2O3 sensors. The highest response of 117 was obtained for 100 ppm NO2 gas at 50 degrees C temperature.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
M. M. Gomaa, M. H. Sayed, V. L. Patil, M. Boshta, P. S. Patil
Summary: This study successfully obtained nickel oxide thin films using a cost-effective chemical spray pyrolysis approach, which showed a polycrystalline cubic structure. The optical transmittance decreased with increasing deposition time, and the highest sensitivity for NO2 detection was found in the NiO thin film deposited for 5 minutes, demonstrating good stability and selectivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
S. Kailasa Ganapathi, Manmeet Kaur, Soumen Samanta, Niyanta Datta, Ajay Singh, R. S. Ningthoujam, S. C. Gadkari, A. K. Debnath
Summary: In this study, the surface modification of tin oxide (SnO2) thin films using magnesium phthalocyanine (MgPc) is shown to enhance NO2 sensing response by 100%. The MgPc modified films exhibit higher sensor response, faster response and recovery time, and lower operating temperature compared to pristine SnO2 films. The enhancement is attributed to the formation of p-n hetero junctions and increased oxygen adsorption sites on the sensor surface.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Chemistry, Physical
Jiran Liang, Wenhao Wu, Qun Lou, Kangqiang Wang, Chang Xuan
Summary: The study focused on the preparation of Ag-modified VO2 nanorods using a two-step method to improve NO2 sensing performance at room temperature. The results showed that nanorods annealed at 450 degrees Celsius had the highest sensitivity, reaching a response value of up to 2.54-5 ppm NO2, while the response value decreased as humidity increased. The good sensing performance was attributed to the catalytic effect of Ag nanoparticles and the changing of the energy band gap.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Inorganic & Nuclear
Amruta B. Nagare, Namdev S. Harale, Suprimkumar D. Dhas, Umesh V. Shembade, Suhas R. Ghatage, Pramod S. Patil, Annasaheb V. Moholkar
Summary: Nanogranular polypyrrole (PPy) thin films were successfully synthesized by in-situ oxidative polymerization and drop casting method. The films exhibited agglomerated granular-like morphology with high roughness. The optimized PPy thin film gas sensor showed excellent response and stability towards NO2 gas even at low concentrations.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Minming Jiang, Ke Xu, Ningbo Liao, Hongming Zhou
Summary: MnPS3 monolayer demonstrates excellent sensing performance to NO2, with a significant change in conductivity upon NO2 adsorption, indicating potential for sensor applications.
APPLIED SURFACE SCIENCE
(2021)
