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Annealing-assisted SnO2 Thin Film for Selective Hydrogen Gas Sensor 用于选择性氢气传感器的退火辅助SnO2薄膜
4区 物理与天体物理
Indian Journal of Pure & Applied Physics Pub Date : 2023-01-01 DOI: 10.56042/ijpap.v61i10.319
{"title":"Annealing-assisted SnO2 Thin Film for Selective Hydrogen Gas Sensor","authors":"","doi":"10.56042/ijpap.v61i10.319","DOIUrl":"https://doi.org/10.56042/ijpap.v61i10.319","url":null,"abstract":"Today, monitoring and classification of hydrogen gas by metal oxide-based sensors are widely studying to improve their selectivity and stability. In present work, hydrogen sensing properties of magnetron sputtered deposited pure SnO2 thin films have been studied. The pure SnO2 thin film was deposited on glass substrate and as-deposited film was annealed at 450 °C for 6 hrs. The annealed SnO2 thin film has crystalline tetragonal structure, granular surface morphology and non-stoichiometry elemental composition of tin and oxygen vacancies. A higher gas sensing response is obtained for annealed SnO2 thin film as compare to as-deposited SnO2 thin film.A limit of detection (LOD) ~175 ppb is estimated for annealed SnO2 thin film-based sensor. This sensor exhibits fast response and recovery time of 42 s/52 s for 50 and 500 ppm hydrogen gas, respectively. The sensor is found highly selective towards H2 gas in compare to different gases such as methane, carbon monoxide and nitrogen dioxide.","PeriodicalId":13509,"journal":{"name":"Indian Journal of Pure & Applied Physics","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135496247","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Statistical Model Analysis of Neutron Multiplicities from Fission of Compound Nuclei in ~ 200 and 250 Mass Region ~ 200和250质量区复合核裂变中子多重度的统计模型分析
4区 物理与天体物理
Indian Journal of Pure & Applied Physics Pub Date : 2023-01-01 DOI: 10.56042/ijpap.v61i11.2609
{"title":"Statistical Model Analysis of Neutron Multiplicities from Fission of Compound Nuclei in ~ 200 and 250 Mass Region","authors":"","doi":"10.56042/ijpap.v61i11.2609","DOIUrl":"https://doi.org/10.56042/ijpap.v61i11.2609","url":null,"abstract":"Statistical model analysis has been performed with and without the inclusion of shell correction in level density and the collective enhancement of level density (CELD) effect for two different mass regions of compound nuclei, i.e., ~ 200 and 250 for the currently available data of neutron multiplicity (Mpre) in the literature in both mass regions. The chosen reactions have comparable excitation energy range. The measured neutron multiplicities are found to be increasing with the excitation energy of the compound nuclei for all the studied reactions except for 19F + 184W. The calculated values of pre-scission neutron multiplicities are found to be significantly underestimated when compared to the experimental values for overlapping excitation energy range for both mass regions and found to be further underestimated in the heavier mass region (ACN ~ 250) as compared to the relatively lighter mass region (ACN ~ 200). The dissipation strength required to reproduce experimental values is found to increase with an increase in excitation energy of the compound nucleus in both the mass regions. Dissipation strength was found to be higher when the effects of shell correction in level density and CELD were included as compared to the dissipation obtained without incorporating these effects.","PeriodicalId":13509,"journal":{"name":"Indian Journal of Pure & Applied Physics","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136304773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis of Iron Oxide Nanoparticles from Scrapped Waste Materials for Efficient Dye Removal to Purify Industrial Waste Water 废料合成氧化铁纳米颗粒高效除染净化工业废水
4区 物理与天体物理
Indian Journal of Pure & Applied Physics Pub Date : 2023-01-01 DOI: 10.56042/ijpap.v61i11.3113
{"title":"Synthesis of Iron Oxide Nanoparticles from Scrapped Waste Materials for Efficient Dye Removal to Purify Industrial Waste Water","authors":"","doi":"10.56042/ijpap.v61i11.3113","DOIUrl":"https://doi.org/10.56042/ijpap.v61i11.3113","url":null,"abstract":"In this investigation, we used a circular economy approach by recycling metal scrap from industry as a component in creating nanoparticles. For producing iron oxide NPs we used electrochemical method with scrapped rusted iron nails as electrodes. In this technique, we used 50mM ferrous sulphate solution as an electrolyte and a direct current power supply. Different methods were used to characterise the synthesised iron oxide NPs, including ultraviolet-visible (UV-visible) spectroscopy, Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), and transmission electron microscopy (TEM). The results demonstrated that the synthesised iron oxide NPs have an average crystallite size of 7.54 nm. Iron oxide NPs has potential to adsorb Congo red dye hence prepared NPs have been utilised for the adsorption of Congo red dye.","PeriodicalId":13509,"journal":{"name":"Indian Journal of Pure & Applied Physics","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136305444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Estimation of Exhalation Rates of Radon and Thoron in the Soil Samples Collected from Gurugram, Haryana, India 印度哈里亚纳邦Gurugram土壤样品中氡和钍的呼出率估计
4区 物理与天体物理
Indian Journal of Pure & Applied Physics Pub Date : 2023-01-01 DOI: 10.56042/ijpap.v61i11.2657
{"title":"Estimation of Exhalation Rates of Radon and Thoron in the Soil Samples Collected from Gurugram, Haryana, India","authors":"","doi":"10.56042/ijpap.v61i11.2657","DOIUrl":"https://doi.org/10.56042/ijpap.v61i11.2657","url":null,"abstract":"Natural radioactivity is the term used to describe radioactivity that persists in the soil, rocks, and water due to fundamental radionuclides such as uranium, thorium, potassium, etc. As a result, radiation affects everyone on the planet. Researchers worldwide find this topic particularly interesting due to the hazardous effects of radionuclides on human health. A systematic survey employing trustworthy methodological approaches is necessary to objectively assess these radionuclides in the environment. In the present paper, ZnS:Ag scintillator-based SMART RnDuo (AQTEK System, India) is used to measure exhalation rates of isotopes 222Rn and 220Rn (radon and thoron) of soil samples. Forty soil samples were studied. For the study of 222Rn, monitoring of the mass exhalation (Rm) was conducted. In the case of 220Rn, monitoring of surface exhalation (Rs) was studied. The radon mass exhalation rate is found in the range of 14±1 to 55±5 mBqkg−1h−1 with an average of 34±10 mBqkg−1h−1 and thoron surface exhalation rate in the range of 2200±215 to 7560±420 Bqm−2h−1 with an average of 4280±960 Bqm−2h−1. Thus, elevated thoron level is observed in most of the samples. Results are compared with the world’s average values.","PeriodicalId":13509,"journal":{"name":"Indian Journal of Pure & Applied Physics","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136305021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Unravelling the Ultralow Thermal Conductivity of Ternary Antimonide Zintl Phase RbGaSb2: A First-principles Study 揭开三元锑锌RbGaSb2的超低导热性:第一性原理研究
4区 物理与天体物理
Indian Journal of Pure & Applied Physics Pub Date : 2023-01-01 DOI: 10.56042/ijpap.v61i9.3152
{"title":"Unravelling the Ultralow Thermal Conductivity of Ternary Antimonide Zintl Phase RbGaSb2: A First-principles Study","authors":"","doi":"10.56042/ijpap.v61i9.3152","DOIUrl":"https://doi.org/10.56042/ijpap.v61i9.3152","url":null,"abstract":"The recent discovery of antimonide based Zintl phase compounds has sparked the research in finding high-performance thermoelectric materials. In present study, a ternary antimonide Zintl phase RbGaSb 2 is investigated using First-principles calculations. A good agreement observed between our computed results, such as lattice parameter and thermal conductivity, with the experimental report validating our theoretical framework. A direct band gap of 1.17 eV is obtained using Tran Blaha modified Becke Johnson approach. The negative value of Seebeck coefficient indicates its n-type character. We purpose a strategy for enhancing power factor via carrier concentration optimization. The calculated results reveal the anisotropic transport properties. The intrinsic ultralow lattice thermal conductivity about 0.094 Wm -1 K -1 along the x-direction, and 0.019 Wm -1 K -1 along z-direction at room temperature is obtained. The ZT value can reach 0.90 (in x-direction) and 0.85 (in z-direction) for n-type doping at 900 K, indicating RbGaSb 2 as promising thermoelectric material.","PeriodicalId":13509,"journal":{"name":"Indian Journal of Pure & Applied Physics","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135494676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Adsorption of RB dye by Ce and Er Doped SnO2 Photocatalysts for Water Remediation Ce和Er掺杂SnO2光催化剂对RB染料的吸附及水处理
4区 物理与天体物理
Indian Journal of Pure & Applied Physics Pub Date : 2023-01-01 DOI: 10.56042/ijpap.v61i9.3407
{"title":"Adsorption of RB dye by Ce and Er Doped SnO2 Photocatalysts for Water Remediation","authors":"","doi":"10.56042/ijpap.v61i9.3407","DOIUrl":"https://doi.org/10.56042/ijpap.v61i9.3407","url":null,"abstract":"This study focuses on synthesis of pure SnO2 nanoparticles and SnO2 nanoparticles doped with Erbium (Er) at 7% and Cerium (Ce) at 7% using sol-gel method. The aim was to evaluate their photocatalytic performance in degrading the harmful Rose bengal dye. XRD analysis confirmed that both undoped and rare earth-doped SnO2 nanoparticles exhibited a tetragonal rutile structure. Photoluminescence (PL) analysis revealed an increase in oxygen vacancy concentration with higher dopant incorporation. Furthermore, band gap of doped SnO2 nanoparticles was reduced compared to pure SnO2. The reduction in the band gap was primarily attributed to creation of vacancy defects caused by dopants. Photocatalytic experiments demonstrated that within 60 minutes of UV light exposure, Er 7% doped SnO2 nanoparticles achieved the degradation of 95.32% of Rose bengal dye. These findings highlight the potential of Er 7% doped SnO2 as a highly effective catalyst for large-scale degradation of industrial waste, specifically organic dyes.","PeriodicalId":13509,"journal":{"name":"Indian Journal of Pure & Applied Physics","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135494681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of Various Parameters on the Triboelectric Generation of Bulk Materials 不同参数对块状材料摩擦发电的影响
4区 物理与天体物理
Indian Journal of Pure & Applied Physics Pub Date : 2023-01-01 DOI: 10.56042/ijpap.v61i9.4741
{"title":"Influence of Various Parameters on the Triboelectric Generation of Bulk Materials","authors":"","doi":"10.56042/ijpap.v61i9.4741","DOIUrl":"https://doi.org/10.56042/ijpap.v61i9.4741","url":null,"abstract":"In this paper we report the study of mechanical energy harvesting of ambient energy based on triboelectric effect. We choose the bulk form of poly-tetrafluoroethylene (PTFE) as electronegative (E-) material and human hand and plywood as the electropositive (E+) materials, respectively making a single electrode based triboelectric generator (TEG). The E+ and E- material were rubbed together to produce a voltage output, which was measured by using a sensitive electrometer. This investigation was carried out for different surface morphology, surface areas of contact, thickness and types of electrode contacts and rubbing frequency. It was observed that sufficient voltage and charge generation was achieved to power low energy devices like LED bulbs, with the highest voltage generation of ~6.2 V for rectangular PTFE sheet, having one surface coated with a thin film of copper for making electrode and other one is made rough using sandpaper, as the E- material and plywood as the E+ material. We observed that the voltage output is influenced by the surface morphology, type of E+ material for the same E- material, frequency of rubbing strokes and frictional area of contact.","PeriodicalId":13509,"journal":{"name":"Indian Journal of Pure & Applied Physics","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135496250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Ag Layer Thickness and Interference of Cu-SnO2/Ag/Cu-SnO2 (CTO/Ag/CTO) Multilayer Thin Film on the Electrical and Optical Properties Cu-SnO2/Ag/Cu-SnO2 (CTO/Ag/CTO)多层薄膜Ag层厚度和干涉对电学和光学性能的影响
4区 物理与天体物理
Indian Journal of Pure & Applied Physics Pub Date : 2023-01-01 DOI: 10.56042/ijpap.v61i9.3498
{"title":"Effect of Ag Layer Thickness and Interference of Cu-SnO2/Ag/Cu-SnO2 (CTO/Ag/CTO) Multilayer Thin Film on the Electrical and Optical Properties","authors":"","doi":"10.56042/ijpap.v61i9.3498","DOIUrl":"https://doi.org/10.56042/ijpap.v61i9.3498","url":null,"abstract":"The present study reports the successful fabrication of CTO/Ag/CTO multilayer thin films with different sandwiched layer (Ag) thickness on a glass substrate by the E-beam evaporation Method. The influence of sandwiched layer thickness and stacking of layers on electrical and optical properties was investigated. Several analytical tools such as X-ray diffraction, Atomic Force microscopy, Hall Effect measurement, and UV-visible spectroscopy were used to investigate the morphological, electrical, and optical properties of the multilayer thin film structure. Multilayer thin film with 14nm Ag thickness exhibited a good combination of conductivity and transmittance (i.e. 4.64 × 104 Ω-1cm-1, 69.3%). The conduction mechanism can be explained on the basis of the islands growth mechanism of Volmer-weber model as Ag film was grown on an amorphous CTO surface. The Haacke’s figure of merit was calculated for valuing the overall performance of the transparent conducting film. The maximum figure of merit is reported as 8.7 × 10-3 Ω-1 for multilayer thin film having Ag thickness of 14nm.","PeriodicalId":13509,"journal":{"name":"Indian Journal of Pure & Applied Physics","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135496252","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Quantum Transport in Mesoscopic Systems 介观系统中的量子输运
IF 0.7 4区 物理与天体物理
Indian Journal of Pure & Applied Physics Pub Date : 2021-01-06 DOI: 10.3390/books978-3-03943-367-4
A. Jayannavar
{"title":"Quantum Transport in Mesoscopic Systems","authors":"A. Jayannavar","doi":"10.3390/books978-3-03943-367-4","DOIUrl":"https://doi.org/10.3390/books978-3-03943-367-4","url":null,"abstract":"","PeriodicalId":13509,"journal":{"name":"Indian Journal of Pure & Applied Physics","volume":"34 1","pages":"603-612"},"PeriodicalIF":0.7,"publicationDate":"2021-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41560394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 37
Temperature dependence of dielectric constant and loss tangent in methyl ammonium aluminium alum 甲基铵铝明矾介电常数和损耗正切的温度依赖性
IF 0.7 4区 物理与天体物理
Indian Journal of Pure & Applied Physics Pub Date : 2016-03-22 DOI: 10.7598/cst2016.1206
A. Rawat
{"title":"Temperature dependence of dielectric constant and loss tangent in methyl ammonium aluminium alum","authors":"A. Rawat","doi":"10.7598/cst2016.1206","DOIUrl":"https://doi.org/10.7598/cst2016.1206","url":null,"abstract":"A model of pseudospin-lattice coupled mode for methyl ammonium aluminium alum (MASD) has been modified to include cubic and quartic phonon anharmonic interactions. With the help of double-time temperature dependent Green’s function method and modified Hamiltonian, expressions for soft mode frequency, dielectric constant and loss tangent have been evaluated. By fitting model values of physical quantities in the theoretical expressions, temperature dependence of soft mode frequency, dielectric constant and loss tangent have been obtained and compared with experimental results of Pepinsky et al. 15 , which show a good agreement.","PeriodicalId":13509,"journal":{"name":"Indian Journal of Pure & Applied Physics","volume":"54 1","pages":"183-187"},"PeriodicalIF":0.7,"publicationDate":"2016-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71371281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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