Article
Engineering, Electrical & Electronic
Monica Jaiswal, Robin Kumar, Jagjiwan Mittal, Pika Jha
Summary: A novel carbon-based material was synthesized by doping Iodine into multilayer graphene using photolysis method. The iodine doped graphene showed selective sensing towards NO2 gas and exhibited fast sensing response.
IEEE SENSORS JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Imtej Singh Saggu, Sukhwinder Singh, Kaiwen Chen, Zhengxi Xuan, Mark T. Swihart, Sandeep Sharma
Summary: High performance with lower power consumption is a crucial feature for sensing devices. Tin disulfide (SnS2) nanosheets have emerged as a promising NO2 sensor, but their poor conductivity hinders their applications. To address this, a low-cost ultrasensitive NO2 gas sensor with SnS2/multiwalled carbon nanotube (SnS2/MWCNT) nanocomposites was developed. The nanocomposites exhibited improved conductivity and the sensor displayed high sensitivity and fast recovery rates.
Article
Materials Science, Multidisciplinary
Wei Wei, Huanhuan Zhang, Tiyue Tao, Xiaohong Xia, Yuwen Bao, Manon Lourenco, Kevin Homewood, Zhongbing Huang, Yun Gao
Summary: In this work, a carbon monoxide sensor based on the CuO/TiO2 heterojunction was designed and fabricated. The sensor exhibits high sensitivity to CO at room temperature due to the good adsorption properties of CuO materials and the heterojunction interface charge transfer. The interference from H-2 is greatly reduced by optimizing the structure of the CuO/TiO2 heterojunction.
ENERGY & ENVIRONMENTAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Doowon Lee, Min Ju Yun, Kyeong Heon Kim, Sungho Kim, Hee-Dong Kim
Summary: A memristor-based NO gas sensor with SnO2, Ta2O5, and HfO2 films has been proposed, showing fast reaction/recovery and high sensitivity. To improve selectivity in multigas environments, a parallel circuit with different gasistors of various sensitivities for different gases is recommended.
Article
Automation & Control Systems
B. S. de Lima, W. A. S. Silva, A. L. Ndiaye, V. R. Mastelaro, J. Brunet
Summary: This article introduces an open-source graphical user interface (GUI) that aims to simplify the analysis process of dynamic response-recovery curves of resistive semiconductor-based gas sensors. The software allows for simultaneous analysis of multiple samples and provides the source code and data analysis examples.
CHEMOMETRICS AND INTELLIGENT LABORATORY SYSTEMS
(2022)
Article
Engineering, Electrical & Electronic
Leonid N. Lobanov, Gennady A. Mesyats, Elizaveta A. Osipenko, Konstantin A. Sharypov, Valery G. Shpak, Sergey A. Shunailov, Michael I. Yalandin, Nikolay M. Zubarev
Summary: This study presents the first experimental results on the generation of sub-relativistic runaway electron flow in a magnetically isolated air-filled diode. The characteristics and properties of the electron flow, including its shape, energy, and time features, have been described based on the experimental results.
IEEE ELECTRON DEVICE LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Yu-Xu Liu, Xiao-Chun Li, Xin He, Zhi-He Peng, Jun-Fa Mao
Summary: An ultra-wideband electric field probe with high sensitivity is proposed, consisting of the coupling part, the transmission part, and the output part. The sensitivity is improved by designing the L-shaped tip and the loaded sensing via in the coupling part. The output part is designed with a horizontal gradual substrate integrated coaxial line (SICL) to grounded coplanar waveguide (GCPW) transition for good field and impedance matching, resulting in a wide bandwidth. The proposed probe has a bandwidth from 10 MHz to 60 GHz and a spatial resolution of 0.7 mm, with a sensitivity about 12 dB higher than the conventional monopole electric field probe at the same size as the coupling part.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2023)
Article
Chemistry, Analytical
Neeraj Dhariwal, Meenu Chahar, Vinod Kumar, O. P. Thakur
Summary: α-Fe2O3 nanoparticles doped with Cr2+, Zn2+, Co2+ were synthesized and used to fabricate an ethanol sensor via a simple hydrothermal technique. Characterization techniques including XRD, FESEM with EDS, and UV-visible spectroscopy were used to investigate the structure, morphology, and composition of the doped α-Fe2O3 nanocomposites. In-situ FTIR and GCMS analysis were performed to confirm the room temperature oxidation of ethanol. The developed sensor using Cr0.1Zn0.9Fe2O3 exhibited a high response towards ethanol gas sensing, with fast response and recovery times and excellent selectivity and stability.
SENSORS AND ACTUATORS B-CHEMICAL
(2023)
Article
Chemistry, Inorganic & Nuclear
Yasser Naji Ahmed, Mohammed Faiad Naief, Samar Naser Mohammed, Ahmed Mishaal Mohammed
Summary: In this study, waste oil was utilized to produce MWCNTs, with sizes ranging from 28.3 to 49.51 nm, as characterized by TEM, FE-SEM, and AFM techniques. The production of MWCNTCOO was confirmed using FTIR. The resulting MWCNTCOO were evaluated as gas sensors for H2S and NO2 gases, exhibiting higher sensitivity response at 70°C (with a response of 10.6 for H2S) and at 190°C (with a response of 29.9 for NO2). The sensor demonstrated unique response recovery features with response and recovery times varying at different temperatures.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Manli Lu, Junyu Chi, Huijuan Chen, Zongxu Liu, Pengfei Shi, Zheng Lu, Liang Yin, Lulu Du, Li Lv, Pinhua Zhang, Kaifeng Xue, Guangliang Cui
Summary: Developing a respiratory analysis disease diagnosis platform for the H2S biomarker is of great significance for real-time disease detection. A Cu2O-MWCNT heterostructure was successfully synthesized, demonstrating high sensitivity to H2S gas at room temperature and low temperature. The sensor showed excellent selectivity, low detection limits, and the ability to detect real oral exhaled breath.
Article
Chemistry, Analytical
Lili Sun, Yun Guo, Yanchao Liu, Ronghua Ni, Gang Chen, Xiaoshun Wei, Zebin An, Zheng Jiao
Summary: This research successfully constructed a core-shell Tourmaline@ZnO/MWCNT micro-nanostructured composite, which exhibited high sensitivity and selectivity towards n-butanol. The unique structure of the composite provided a larger specific surface area, resulting in more active sites for gas sensing. The performance assessments demonstrated exceptional gas-sensing properties of the composite material.
SENSORS AND ACTUATORS B-CHEMICAL
(2022)
Article
Optics
Yu Xue, Ziliang Ruan, Liu Liu
Summary: A high-sensitivity electrode-free photonic electric field sensor is introduced in this study, which utilizes a thin film lithium niobate platform and a Michelson interferometer as the sensing element. The sensor achieves a minimal detectable electric field amplitude of 8.43 mV/m/Hz(1/2) and enables vectorial response with a measured extinction ratio (ER) of 38 dB.
Article
Chemistry, Inorganic & Nuclear
Shiyu Zhou, Wenjun Yan, Min Ling, Chengdu Liang
Summary: A facile solution reduction method was used to modulate the oxygen vacancies of ZnO nanosheets, resulting in enhanced hydrogen sensing properties with significantly reduced operating temperature (150 degrees C), higher response (around 38.2 for 200 ppm), lower limit of detection (55 ppb), and quick recovery speed (only 6 s). The increased molecule adsorption and narrower band gap generated by controlled oxygen vacancies contribute to the superior sensing properties. The oxygen vacancy engineering strategy of pure metal oxide semiconductor-based materials shows great potential for creating low-temperature high-response sensors.
INORGANIC CHEMISTRY FRONTIERS
(2023)
Article
Engineering, Electrical & Electronic
Jiahong Zhang, Hongyi Lei
Summary: This paper analyzes the effect of crystal geometry size on measurement sensitivity. It concludes that increasing the size of the lithium niobite (LN) crystal along the direction of the applied electric field and reducing the size along the vertical direction of the applied electric field can improve sensor sensitivity. Experimental results confirm these conclusions and show that using a trapezoidal crystal design can suppress resonance.
SENSORS AND ACTUATORS A-PHYSICAL
(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.
Correction
Chemistry, Physical
Chen Luo, Yan Shao, Hua Yu, Hong-zhi Ma, Yu-hao Zhang, Long Gu, Bo Yin, Ming-bo Yang
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Stefano Borocci, Armando Camerlingo, Felice Grandinetti, Maria Rutigliano, Nico Sanna
Summary: The complexes of He, Ne, Ar, Kr, and Xe with B3N3H6 were investigated using MP2, CCSD(T), and SAPT ab initio methods. The complexes can be described as mono-, di-, and tri-coordinated to the N atoms, with stability following the order N-mono < N-di < N-tri. The interactions are dominated by dispersion and the binding energies are within the range of 1 or 2 kcal mol(-1). The results were compared with a recent DFT study on larger BN sheets complexes [Phys. Chem. Chem. Phys. 24 (2022) 2554-2566.].
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
V. Nagarajan, R. Bhuvaneswari, R. Chandiramouli
Summary: In this study, stable phosphoborane was used as a sensor to detect isobutane and n-propane in Liquefied Petroleum Gas (LPG). Phosphoborane demonstrated structural stability and semiconducting nature, and exhibited promising adsorption properties for the LPG molecules.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Xiaoxi Xu, Zijiang Yang, Bayaer Buren, Maodu Chen
Summary: In this study, the time-dependent wave packet method was used to investigate the reaction channels and mechanisms of Ca+ + HD. The results show that the CaH+ + D reaction channel plays a primary role, which is consistent with experimental results. Complex forming and direct-abstraction reaction mechanisms exist in this reaction process.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Keshab Pandey, Hae Kyung Jeong
Summary: A free-standing silicon-carbon nanofiber composite film was synthesized and investigated for supercapacitor applications. It exhibited high specific capacitance, energy density, and power density. After 5000 cycles, the film showed excellent specific capacitance retention and Coulombic efficiency.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Xinyu Zhang, Haosong Li, Xiaoyu Cao, Jing Gao, Yong Wei, Jianzhuo Zhu
Summary: The evaporation behavior of nanosized water aggregations on two-dimensional electroneutral solid surfaces with different surface polar unit densities was investigated. The results showed that the evaporation rate changes non-monotonically with the surface polar unit density, and the minimum evaporation rate is obtained when the surface has a modest surface polar unit ratio of 66.7%.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Yanyan Xu, Rui Dai, Xiaojie Wang, Zhijun Qiao, Haowei Wen, Dianbo Ruan, Yuzuo Wang
Summary: This article presents an innovative solvothermal sodium insertion method for synthesizing Triphylite-NaFePO4, which demonstrates optimal electrochemical performance in sodium-ion batteries.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Meiyi Jiang, Kun Yang, Yancheng Liu, Li Yao
Summary: The geometric structure and electronic properties of transition metal M (M = Cu, Fe, Mn)-TiO2 (101) surface adsorbed by NO2 and N2O were calculated by density functional theory (DFT) and DFT + U theory. The results showed that the adsorption of NO2 and N2O on Mn and Fe atoms is more stable, and a large number of active electrons are formed around these atoms, facilitating the catalytic reactions.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Sergey A. Vyrko, Yulia G. Polynskaya, Nikita A. Matsokin, Andrey M. Popov, Andrey A. Knizhnik, Nikolai A. Poklonski, Yurii E. Lozovik
Summary: In this study, carbon nanobracelets, which are cyclic molecules composed of alternating polycyclic regions and double carbon chains, were investigated using spin-polarized density functional theory. The results show that carbon nanobracelets with odd number of monomers exhibit distinct electronic energy levels, band gaps, and carbon chain deformation compared to those with even number of monomers.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Chanchan Wang, Quan Yang, Yanzhi Ding, Xiaoyong Lu, Dong Tian
Summary: It has been found that the introduction of buffer layers improves the electrical performance of solid oxide fuel cells (SSOFCs). In this study, varying ratios of Gd-doped CeO2 were used as buffer layers in YSZ-based SSOFCs. The results demonstrate that the performance of SSOFCs is enhanced when a buffer layer is added, with the highest performance achieved using Ce0.8Gd0.2O2-delta (GDC20) as the buffer layer. This suggests that the use of GDC series buffer layers is an attractive strategy to optimize performance loss due to electrolyte-electrode interactions.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Wang Li, Yi-Fan Zhang, Jia-Bin Huang, Chang-Yang Wang, Feng Zhang, Jiu-Zhong Yang, Long Zhao
Summary: The gas-phase reaction of propargyl with vinylacetylene was investigated using synchrotron photoionization and molecular-beam mass spectrometry methodologies. The formation mechanisms of the resulting cyclic structures were examined using quantum computations. Two previously unidentified isomers were detected and identified for the first time.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Avijit Pramanik, Sanchita Kundu, Olorunsola Praise Kolawole, Kaelin Gates, Paresh Chandra Ray
Summary: This study investigates the influence of aspect ratio and quantum confinement on the single-photon and two-photon absorption cross-section of perovskite CsPbI3 nanorods. Experimental data shows that CsPbI3 nanorods have an extremely high two-photon absorption cross-section, significantly surpassing organic chromophores and other CsPbBr3 nanocrystals. Moreover, adjusting the aspect ratio can significantly enhance the absorption ability. Additionally, the study also reveals a moderate quantum confinement effect on the single-photon and two-photon absorption cross-section of the nanorods.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Hyon-Tae Pak, Jin-A Choe, Kyong-Sik Ju, Yong -Son Rim
Summary: Drug-loaded cellulose diacetate (CDA) membranes were prepared using different compositions of mixed solvent. The microstructure and performance of the membranes were investigated, and a method to predict drug release properties was proposed. The results showed that the composition of the mixed solvent significantly affected the overall performance of CDA membranes, and the release rates of drugs were related to Δdelta and the intrinsic viscosity of CDA.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Gabriella E. Ravin, E. Curotto
Summary: We have developed a systematic approach to optimize the training set sizes for neural networks in fitting ab initio potential energy surfaces. Using this approach, we have constructed several spectroscopic quality potential energy surfaces for [Li(H2)n]+, n = 1 - 9. The ground state properties have been computed for all the systems and selected states.
CHEMICAL PHYSICS LETTERS
(2024)
Article
Chemistry, Physical
Guohua Xu, Lei Xu, Feng Zhang, Chunling Yu, Yu Song
Summary: NiS1.03@Ni7S6/carbon composite was successfully prepared using corn stalk as a carbon source via a simple adsorption-sulphurization process. The composite exhibited a specific capacitance of 1554.6 F/g at 1 A/g as a supercapacitor electrode, with a capacitance retention rate of 80.4% after 5000 cycles. Furthermore, the NiS1.03@Ni7S6/carbon//AC asymmetric supercapacitor showed a high energy density of 41.2 Wh kg-1 at a power density of 750 W kg-1, and excellent cycling stability with 86.8% capacitance retention after 10,000 cycles.
CHEMICAL PHYSICS LETTERS
(2024)