Article
Chemistry, Multidisciplinary
Sonia Freddi, Miriam C. Rodriguez Gonzalez, Pilar Carro, Luigi Sangaletti, Steven De Feyter
Summary: In this study, functionalized graphene gas sensors for ammonia detection were developed. The sensing capability of the covalently modified graphene layers was proven superior, and the sensor's response to ammonia was defect-driven, as revealed by theoretical calculations.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Amutha Eswaran, Madhumitha Thirumalainambi, Rajaduraipandian Subramaniam, Gurusamy Annadurai
Summary: In this study, room temperature operative carbon dioxide gas sensing electrodes were developed through a simple sonication assisted hydrothermal method. The prepared nanoparticles showed high sensitivity and selectivity towards CO2, with a quick response and recovery time. The electrode also demonstrated long-term stability. This cost-effective method has great potential for fabricating room temperature CO2 gas sensors.
NANOSCALE ADVANCES
(2023)
Article
Chemistry, Physical
Akash Rawat, Sagar Panwar, L. P. Purohit
Summary: Hollow cylindrical nanocomposites were synthesized using the sol-gel co-precipitation method and coated on inter-digitated electrodes using the doctor blade method. Various characterization techniques were used to analyze the samples and confirmed the presence of hollow cylindrical microstructure and a surface rich in oxygen vacancies and adsorbed oxygen species. Gas sensing tests showed that the sensor with x=0.8 exhibited the highest response.
SURFACES AND INTERFACES
(2023)
Article
Engineering, Electrical & Electronic
Jingjing Yu, Wei Ding, Laxmi Jaishi, Chenwen Lin, Rachel Boylan, Chinmay Chandrakant Dixit, Buddhi Sagar Lamsal, Wei He, Francis Tsow, Songxin Tan, Yue Zhou, Xiaojun Xian
Summary: Colorimetric gas sensors are widely used in hazardous gas detection, food freshness assessment, and gaseous biomarker identification due to their high sensitivity and selectivity, low cost, and good compatibility. However, their one-time discrete measurement design limits their application in continuous analytes monitoring. In this work, we proposed a novel sensor design to prolong the lifetime of colorimetric gas sensors by controlling the gas diffusion process. We compared two geometries and found that the 2-D gas diffusion geometry demonstrated better sensor performance.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Analytical
Gita Nematbakhsh Abkenar, Mathilde Rieu, Philippe Breuil, Jean-Paul Viricelle
Summary: In this study, Au-V2O5 sensing material was tested as a sensing electrode for developing mixed-potential ammonia gas sensors. By adjusting the V2O5 content, selective ammonia sensors could be achieved at high temperatures. The selectivity of the sensor to NH3 and other gases varied under different conditions.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Engineering, Electrical & Electronic
Shiv Dutta Lawaniya, Nisha Meena, Sanjay Kumar, Yeon-Tae Yu, Kamlendra Awasthi
Summary: We investigated the gas sensing properties of nanocomposites of polypyrrole (PPy) and multiwalled carbon nanotubes (MWCNTs) synthesized using ex situ and in situ polymerization techniques. The MWCNTs were well dispersed in the PPy matrix prepared via in situ technique. The in situ prepared PPy-MWCNT composite showed superior sensing performance towards NH3 with high response, short response/recovery time, good selectivity, and repeatability.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Jiri Stulik, Josef Slauf, Radek Polansky, Martin Mergl, Martin Kalbac
Summary: An ammonia gas sensor material based on sulfonic functionalized single-wall carbon nanotubes modified by poly(3,4-ethylenedioxythiophene) was prepared and its sensing performance was studied. The sensor showed excellent response to ammonia at room temperature and the ability to detect ammonia at sub-ppm concentration.
IEEE SENSORS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Avik Sett, Santanab Majumder, Tarun Kanti Bhattacharyya
Summary: The flexible room temperature ammonia gas sensor fabricated on a transparent sheet using reduced graphene oxide nanosheets shows high response and selectivity. It exhibited a very high response of 930% toward 400-ppm ammonia at 25 degrees C and 45% relative humidity level, and was found to be humidity resistant. Additionally, the sensor demonstrated quick response time, full recovery, and flexibility during bending tests.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Chemistry, Analytical
Qiyilan Guang, Baoyu Huang, Jun Yu, Jianwei Zhang, Xiaogan Li
Summary: Research showed that tungsten sulfide decorated with indium oxide nanoparticles (In2O3/WS2) exhibited significantly improved sensing performance for ammonia gas at room temperature, with better response and recovery time, excellent selectivity, and reproducibility.
Article
Chemistry, Analytical
M. Amarnath, K. Gurunathan
Summary: A novel ammonia gas sensing electrode material with excellent selectivity and stability was reported, showing a high sensitivity of 85% towards NH3 at 50 ppm concentration, with a response time of 104 seconds and a recovery time of 47 seconds. The material achieved efficient detection of ammonia gas through the assembly of nanorods on its surface, providing high electrical conductivity. This composite material demonstrated outstanding stability at room temperature, maintaining 99% of its initial sensitivity after 50 days.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Engineering, Electrical & Electronic
Ravindra Jha, Aman Nanda, Navakanta Bhat
Summary: By loading MoSe2 nanosheets on RGO sheets, the sensitivity and response time of the ammonia gas sensor were significantly improved in this study. The nanocomposite sensor showed a detection limit of 300 ppb, with a responsivity 2.6 times higher than that of the pure RGO sensor, and ultra-low power consumption.
IEEE SENSORS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Samaneh Esmaeili, Mohammad Ali Zanjanchi, Hossein Golmojdeh, Shahab Shariati
Summary: Uniform micro-sized silica spheres coated with mesoporous shells were prepared using a sol-gel method, loaded with sensitive dyes to create a solid-state colorimetric gas sensor for ammonia detection. The sensor array showed an instantaneous response to low concentrations of ammonia gas and was able to detect a wide range of concentrations from 10 to 1000 ppm, with a detection limit of 0.6 ppm.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Analytical
Yanjie Wang, Yong Zhou, Yuhang Wang, Ruijie Zhang, Jing Li, Xian Li, Zhigang Zang
Summary: The study utilized TiO2 nanoparticles decorated BP nanosheets as the sensing layer, achieving selective detection of 0.5-30 ppm NH3 at room temperature for the first time. The optimized BP-TiO2 sensors showed higher response, less baseline drift, shorter response/recovery times, and stronger long-term stability compared to pure BP counterparts.
SENSORS AND ACTUATORS B-CHEMICAL
(2021)
Article
Chemistry, Analytical
Enza Panzardi, Nicola Calisi, Nicoleta Enea, Ada Fort, Marco Mugnaini, Valerio Vignoli, Anna Vinattieri, Mara Bruzzi
Summary: The response of resistive In2O3-x sensing devices to different concentrations of NO2 under various operative conditions was investigated. The sensing layers were 150 nm thick films manufactured by oxygen-free room temperature magnetron sputtering deposition, which allowed for easy and fast manufacturing process while providing advantages in terms of gas sensing performances. The oxygen deficiency during growth created high densities of oxygen vacancies that facilitated NO2 absorption reactions on the surface and acted as donors in the bulk. The sensor exhibited a baseline resistance of kilohms and showed remarkable performances in terms of gas sensitivity.
Article
Engineering, Electrical & Electronic
LiangLiang Liu, Zijuan Tang, Chenyang He, Serhiy Korposh, Shuqin Lou, Stephen P. Morgan
Summary: The optical fibre ammonia gas sensor demonstrated in the study utilizes a functionalized suspended-core fibre and a ratiometric method for signal processing, showing a capability of detecting ammonia at ppb levels with a fast response time and reusability after treatment.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Chemistry, Physical
Inkyum Kim, Hyeonhee Roh, Jinsoo Yu, Nagabandi Jayababu, Daewon Kim
ACS ENERGY LETTERS
(2020)
Article
Chemistry, Multidisciplinary
Seungju Jo, Inkyum Kim, Nagabandi Jayababu, Hyeonhee Roh, Youngsu Kim, Daewon Kim
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2020)
Article
Acoustics
Nagabandi Jayababu, Seungju Jo, Youngsu Kim, Daewon Kim
Summary: The combination of carbon nanotubes (CNTs), zinc oxide (ZnO), and nickel oxide (NiO) in supercapacitor electrodes showed significant improvements in performance, enhancing areal capacity and cycling stability.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Chemistry, Physical
Madhukar Poloju, Nagabandi Jayababu, E. Venkateshwer Rao, Ruppa Govinda Rao, M. V. Ramana Reddy
SURFACES AND INTERFACES
(2020)
Article
Materials Science, Multidisciplinary
Peddavarapu Sivakumar, Harish Sharma Akkera, T. Ranjeth Kumar Reddy, Yugandhar Bitla, V Ganesh, P. Mohan Kumar, G. Srinivas Reddy, Madhukar Poloju
Summary: In this study, Ti-doped SnO2 thin films were successfully grown on glass substrates using a cost-effective sol-gel spin coating method. The Ti doping concentration was found to significantly affect the structural, optical, and electrical properties of the films. Results showed changes in grain size, transmittance, optical band gap energy, sheet resistance, resistivity, and figure of merit with increasing Ti content.
Article
Materials Science, Multidisciplinary
Tijin Thomas, Nagabandi Jayababu, Julakanti Shruthi, Alex Mathew, Andrea Cerdan-Pasaran, Javier Alejandro Hernandez-Magallanes, K. C. Sanal, R. Reshmi
Summary: Ammonia gas sensors utilizing aligned one-dimensional orthorhombic molybdenum trioxide (α-MoO3) nanorods demonstrated high sensitivity and stability at room temperature, with the sensors annealed at 400 degrees Celsius showing response to lower concentrations of ammonia. The morphological and structural changes of α-MoO3 nanorods after annealing contributed to the improved sensing response.
Article
Nanoscience & Nanotechnology
Nagabandi Jayababu, Seungju Jo, Youngsu Kim, Daewon Kim
Summary: A facile strategy for the fabrication of nickel and iron mixed metal telluride hierarchical nanorods on nickel foam is proposed, with conductive silver decorated on the surface to improve conducting channels and enhance electrochemical performance. The electrode showed high areal capacity due to the combined advantages of electroactive NiFe mixed metal, conductive tellurium and silver, and hierarchical nanorod-like nanomorphology.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Nagabandi Jayababu, Daewon Kim
Summary: This study proposes an integrated energy conversion and storage system consisting of a triboelectric nanogenerator and a supercapacitor based on flexible ZnO nanorods@conductive carbon black nanocomposite. The experiments demonstrate that the integrated device efficiently converts and stores energy, offering new opportunities for flexible energy conversion and storage devices with simple structures.
Article
Chemistry, Multidisciplinary
Nagabandi Jayababu, Daewon Kim
Summary: Metal-organic frameworks derived metal chalcogenides show promise as active materials for supercapacitors, overcoming existing challenges with their large electroactive sites and enhanced electrochemical conductivities. The CuCoTe honeycomb-like nanosheets and CuCo layered double hydroxides electrodes display excellent specific capacity and capacity retention. The hybrid supercapacitor assembly with high energy and power densities exhibits remarkable stability, showcasing the potential of the fabrication method and selected materials to address issues faced by electrochemical capacitors.
Article
Chemistry, Physical
Nagabandi Jayababu, Daewon Kim
Summary: Fabric-based tribo-electric nanogenerators (TENGs) are promising energy sources for wearable electronic devices, especially when using Co/Zn bimetal organic framework based TENG (BMOF TENG) with 15% Zn content to achieve superior electrical output. The unique surface features of BMOF/FCF also enable gas sensing applications, showing good selectivity towards ammonia at room temperature.
Article
Chemistry, Physical
Seungju Jo, Nagabandi Jayababu, Daewon Kim
Summary: Mixed metal hydroxide (MMH) based supercapacitor electrodes, with their outstanding performance from the synergistic effect originating from mixed metallic elements, have attracted considerable attention for energy storage devices. A layered double hydroxide (LDH) structure, such as cobalt-iron LDH nanosheets (CoFe LDH NSs), has been successfully designed on nickel fabric using a facile electrochemical deposition method. The optimized Co0.5Fe0.5 electrode exhibited superior electrochemical performance, and when integrated with activated carbon (AC) electrode, a hybrid supercapacitor (HSC) device with high areal capacitance, energy density, power density, and cycling stability was assembled. Furthermore, the fabricated flexible device offers the significance as a power source in flexible electronic devices with its high degree of flexibility originated from flexible substrate.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Nay Yee Win Zaw, Seungju Jo, Jihyeon Park, Narasimharao Kitchamsetti, Nagabandi Jayababu, Daewon Kim
Summary: This study proposes a novel battery-type electrode based on montmorillonite as a template for the hierarchical growth of nickel telluride nanostructures. The obtained electrode exhibits superior electrochemical performance and high specific surface area, demonstrating excellent energy storage properties.
APPLIED CLAY SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Julakanti Shruthi, Nagabandi Jayababu, M. V. Ramana Reddy
Summary: Ag:Y2O3-SnO2 core-shell nanocomposites were fabricated for high-efficiency gas sensing applications, showing superior sensing performance and good stability towards low concentrations of ammonia. The sensor exhibited rapid response and recovery time, as well as increased sensitivity towards ammonia at room temperature.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Analytical
Kedhareswara Sairam Pasupuleti, Sayandeep Ghosh, Nagabandi Jayababu, Chang-Jong Kang, Hak Dong Cho, Song -Gang Kim, Moon-Deock Kim
Summary: In this study, a boron-doped graphitic carbon nitride quantum dots coated langasite surface acoustic wave sensor was developed for room temperature NO2 gas detection. UV activation energy was applied to enhance the NO2 sensing. This work provides insights into the design and development of 2D graphitic carbon nitride nanostructure-based room temperature gas sensors for environmental monitoring.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Materials Science, Multidisciplinary
Seungju Jo, Inkyum Kim, Junmoo Byun, Nagabandi Jayababu, Daewon Kim
Summary: The hybrid nanogenerator efficiently provides power for healthcare systems by scavenging human motion and heat energy, reducing mortality in emergency situations and improving the accuracy of fall detection.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
