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DAE SOLID STATE PHYSICS SYMPOSIUM 2019最新文献

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Effect of Yb3+ ion on light upconversion emission in Er3+ doped SrMoO4 ceramics prepared by solid state reaction Yb3+离子对固相反应制备Er3+掺杂SrMoO4陶瓷光上转换发射的影响
DAE SOLID STATE PHYSICS SYMPOSIUM 2019 Pub Date : 2020-11-05 DOI: 10.1063/5.0017557
Ankur Shandilya, K. Sreenivas
{"title":"Effect of Yb3+ ion on light upconversion emission in Er3+ doped SrMoO4 ceramics prepared by solid state reaction","authors":"Ankur Shandilya, K. Sreenivas","doi":"10.1063/5.0017557","DOIUrl":"https://doi.org/10.1063/5.0017557","url":null,"abstract":"The Er3+ / Yb3+ co-doped SrMoO4 phosphor were synthesized via solid state reaction method. X-ray diffraction studies on sintered powders indicated the formation of single phase tetragonal structure, and the lattice parameters are measured by Rietveld analysis using TOPAS software. A remarkable enhancement in upconversion (UC) emission intensity in the presence of Yb3+ sensitizer ion and the detailed mechanism in proposed UC emission is studied. The dynamics of up-conversion process, by recording the decay profiles is also studied.","PeriodicalId":222119,"journal":{"name":"DAE SOLID STATE PHYSICS SYMPOSIUM 2019","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133404763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Single crystal growth and structural characterization of Bi1.8Sb0.2Te1.5Se1.5 (BSTS) single crystal Bi1.8Sb0.2Te1.5Se1.5 (BSTS)单晶生长及结构表征
DAE SOLID STATE PHYSICS SYMPOSIUM 2019 Pub Date : 2020-11-05 DOI: 10.1063/5.0017664
P. K. Ghose, T. K. Dalui, S. Giri
{"title":"Single crystal growth and structural characterization of Bi1.8Sb0.2Te1.5Se1.5 (BSTS) single crystal","authors":"P. K. Ghose, T. K. Dalui, S. Giri","doi":"10.1063/5.0017664","DOIUrl":"https://doi.org/10.1063/5.0017664","url":null,"abstract":"We report the single crystal growth and X-ray diffraction characterization of bulk Bi1.8Sb0.2Te1.5Se1.5 single crystals. Single crystal of Bi1.8Sb0.2Te1.5Se1.5 was grown by modified Bridgman method. The diffraction peaks corresponding to {0, 0, 3} planes reveal the growth of crystal along the c-direction. Analysis of X-ray diffraction pattern using Rietveld refinement verifies the phase purity, and confirms rhombohedral structure with R-3m space group.","PeriodicalId":222119,"journal":{"name":"DAE SOLID STATE PHYSICS SYMPOSIUM 2019","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122644766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Strain induced enhancement in thermoelectric power factor of ZrTe2 应变诱导ZrTe2热电功率因数的增强
DAE SOLID STATE PHYSICS SYMPOSIUM 2019 Pub Date : 2020-11-05 DOI: 10.1063/5.0017122
Hardik L. Kagdada, Vaishali Sharma, P. Jha, D. Singh
{"title":"Strain induced enhancement in thermoelectric power factor of ZrTe2","authors":"Hardik L. Kagdada, Vaishali Sharma, P. Jha, D. Singh","doi":"10.1063/5.0017122","DOIUrl":"https://doi.org/10.1063/5.0017122","url":null,"abstract":"We investigated the strain modulated thermoelectric properties of ZrTe2 using Boltzmann transport theory. The electronic structure calculation at 0% strain shows metallic nature of ZrTe2. The separation between conduction band minima and valence band maxima increases with tensile strain and results in an indirect bandgap of 0.5 eV at -8 % strain. This metallic to semiconductor transition lead to the higher value of Seebeck coefficient (282.58 µV/K at 550 K) for tensile strain up to 8 %. Such higher value of Seebeck coefficient in ZrTe2 for 8 % tensile strain results in high power factor (PF/τ) at room temperature which suggests high capability for output power generation for constant heat source at room temperature.","PeriodicalId":222119,"journal":{"name":"DAE SOLID STATE PHYSICS SYMPOSIUM 2019","volume":"510 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120967685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Electronic states of RuO2 using hybrid functionals 利用杂化官能团研究RuO2的电子态
DAE SOLID STATE PHYSICS SYMPOSIUM 2019 Pub Date : 2020-11-05 DOI: 10.1063/5.0017233
V. Maurya, U. Paliwal, G. Sharma, K. B. Joshi
{"title":"Electronic states of RuO2 using hybrid functionals","authors":"V. Maurya, U. Paliwal, G. Sharma, K. B. Joshi","doi":"10.1063/5.0017233","DOIUrl":"https://doi.org/10.1063/5.0017233","url":null,"abstract":"To describe the electronic properties of transition metal oxides proper description of the strong correlations of d electrons is needed. In addition to the DFT+U approach the hybrid functionals are also used for such description in recent studies. In this paper we present electronic structure of the rutile phase of RuO2. Crystal parameters are determined using PBE0 hybrid functional. After determining the lattice parameters using PBE0, a few more hybrid functionals are modeled varying the mixing of PBE exchange with the Fockexchange. The mixing leads to the band gap opening caused by the 4d band as found in DFT+U calculations by other workers. The results are discussed and compared with other theories and experiments.","PeriodicalId":222119,"journal":{"name":"DAE SOLID STATE PHYSICS SYMPOSIUM 2019","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126050131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Room temperature H2 gas sensor using candle carbon soot 室温H2气体传感器采用蜡烛炭烟灰
DAE SOLID STATE PHYSICS SYMPOSIUM 2019 Pub Date : 2020-11-05 DOI: 10.1063/5.0017866
S. Dhall, B. Mehta
{"title":"Room temperature H2 gas sensor using candle carbon soot","authors":"S. Dhall, B. Mehta","doi":"10.1063/5.0017866","DOIUrl":"https://doi.org/10.1063/5.0017866","url":null,"abstract":"Hydrogen (H2) gas is rising as a promising fuel source to replace available fossil fuels. It is well known that H2 based fuel finds numerous applications in transportation, industries and in rockets for space vehicles, therefore, the fabrication of H2 sensor is important for its safe and controlled use. But, detection of H2 gas at room temperature with fast response and recovery time is still a challenge. In last few years, carbon materials are widely investigated because it is enormously sensitive to H2 at room temperature conditions. In this work, the inexpensive candle carbon soot (CCS) is used to detect H2 gas at room temperature conditions. A simple flame of candle is used to synthesize the multilayers of carbon soot at room temperature conditions. It is observed that the functionalized of CCS in inert atmosphere plays an important role in the enhancement of structural and sensing properties as compared to as-synthesized CCS. The structural properties were investigated by X-ray diffraction(XRD), Raman spectroscopy and scanning electron microscopy (SEM). We further reported that CCS proved prominent sensing materials for the 2% detection of H2 at room temperature.","PeriodicalId":222119,"journal":{"name":"DAE SOLID STATE PHYSICS SYMPOSIUM 2019","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128745976","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Photocatalytic degradation of anionic and cationic dye by Zn/Al-CO3 layered double hydroxide 2d materials Zn/Al-CO3层状双氢氧化物二维材料光催化降解阴离子和阳离子染料
DAE SOLID STATE PHYSICS SYMPOSIUM 2019 Pub Date : 2020-11-05 DOI: 10.1063/5.0016926
Shubham Dutta, Pijush K. Gan, K. Chatterjee
{"title":"Photocatalytic degradation of anionic and cationic dye by Zn/Al-CO3 layered double hydroxide 2d materials","authors":"Shubham Dutta, Pijush K. Gan, K. Chatterjee","doi":"10.1063/5.0016926","DOIUrl":"https://doi.org/10.1063/5.0016926","url":null,"abstract":"Accelerating thrust has been noticed for the last couple of years in the direction of new two dimensional materials for fruitful functional applications. Zn/Al layered double hydroxide (LDH) with intercalated anion carbonate as visible light response photo catalyst was fabricated by co-precipitation method. The as prepared LDH photo catalyst was characterized to reveal the structure and texture. The photo catalysis activity of the 2D materials was studied by degradation of an anionic dye methyl orange and a cationic dye methylene blue. It is found that Zn/Al-CO3 LDH has magnificent performance for the degradation of anionic dye and the efficiency is superior to the performance on cationic dye. The kinetics and mechanism of photo catalytic dye degradation of Zn/Al-CO3 LDH were also discussed. The work presents layered materials by facile synthesis and open up the opportunity for easy and cost effective water remediation.","PeriodicalId":222119,"journal":{"name":"DAE SOLID STATE PHYSICS SYMPOSIUM 2019","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133040216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Study of surface effect in n-type SrTiO3/LaAlO3 heterostructure by first principle calculations 用第一性原理计算研究n型SrTiO3/LaAlO3异质结构的表面效应
DAE SOLID STATE PHYSICS SYMPOSIUM 2019 Pub Date : 2020-11-05 DOI: 10.1063/5.0017333
Sanchari Bhattacharya, S. Datta
{"title":"Study of surface effect in n-type SrTiO3/LaAlO3 heterostructure by first principle calculations","authors":"Sanchari Bhattacharya, S. Datta","doi":"10.1063/5.0017333","DOIUrl":"https://doi.org/10.1063/5.0017333","url":null,"abstract":"It is obvious that the electronic properties of a heterostructure crucially depend on the combination of atomic layers at the interface. But, surprisingly it also depends on the termination of the substrate and epitaxial layers. Here, we have studied two different n-type SrTiO3/LaAlO3 heterostructure, one starting with SrO and terminated with AlO2 and the other having TiO2 and LaO at the two ends. We show that in the first case the system is insulating and in other case it is metallic even though the atomic layers at the interface are unchanged.","PeriodicalId":222119,"journal":{"name":"DAE SOLID STATE PHYSICS SYMPOSIUM 2019","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130961487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Nickel in nitrogen-doped graphene nanotube as efficient electrocatalyst for water splitting 氮掺杂石墨烯纳米管中镍作为水分解的高效电催化剂
DAE SOLID STATE PHYSICS SYMPOSIUM 2019 Pub Date : 2020-11-05 DOI: 10.1063/5.0017533
B. Sarkar, K. Nanda
{"title":"Nickel in nitrogen-doped graphene nanotube as efficient electrocatalyst for water splitting","authors":"B. Sarkar, K. Nanda","doi":"10.1063/5.0017533","DOIUrl":"https://doi.org/10.1063/5.0017533","url":null,"abstract":"Designing an efficient bifunctional electrocatalyst for kinetically sluggish hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is a necessity for energy efficient water splitting. In this regard, we report facile synthesis of a phase pure face centered cubic (FCC) nickel electrocatalyst in nitrogen doped graphene nanotube (NGT) of diameter∼100 nm. The single step in-situ synthesis of Ni-NGT synthesized by pyrolysis is cost effective and the bifunctional catalytic activity that can compete with the state-of-the-art Pt-C and RuO2 catalyst for HER and OER, respectively. The enhanced catalytic activity can be attributed to the synergistic effect of Ni active centers, defect sites due to N-doping and the conducting NGT support.","PeriodicalId":222119,"journal":{"name":"DAE SOLID STATE PHYSICS SYMPOSIUM 2019","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117269091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Sputter deposited ultrathin Al2O3 protected silver nanoislands film as an oxidation resistant SERS substrate 溅射沉积超薄Al2O3保护银纳米岛膜作为抗氧化SERS衬底
DAE SOLID STATE PHYSICS SYMPOSIUM 2019 Pub Date : 2020-11-05 DOI: 10.1063/5.0017232
P. Nandhagopal, D. Mohan
{"title":"Sputter deposited ultrathin Al2O3 protected silver nanoislands film as an oxidation resistant SERS substrate","authors":"P. Nandhagopal, D. Mohan","doi":"10.1063/5.0017232","DOIUrl":"https://doi.org/10.1063/5.0017232","url":null,"abstract":"In this work, we have used radio frequency (RF) plasma for depositing an ultrathin layer of Al2O3 above Ag nanoislands film to tune the surface plasmon resonance (SPR) and to passivize the surface silver atoms from oxidizing. The surface morphology of the films show nanoislands feature with uniform film coverage on the substrate. The temporal stability of SPR is compared for both Al2O3 coated and bareAg thin films from optical absorption. In the absence of a passivizing layer the bare Ag films lose their SPR peak centered at 435 nm after a four week atmospheric storage, whereas the Al2O3 overlayer protected Ag films shows a consistent SPR with the peak maximum red shifted to 460 nm. Along with red shift, there is an increase in the strength and broadening of SPR which ranges from 360 to 550 nm. Surface-enhanced Raman studyshows the detectionof methylene blue at a concentration of 10-3 and 10-4 M from the prepared films.","PeriodicalId":222119,"journal":{"name":"DAE SOLID STATE PHYSICS SYMPOSIUM 2019","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125611565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Calculation of flux for superconducting wavelength shifter based high energy X-ray diffraction beamline BL-15 基于超导移波器的高能x射线衍射光束线BL-15的通量计算
DAE SOLID STATE PHYSICS SYMPOSIUM 2019 Pub Date : 2020-11-01 DOI: 10.1063/5.0025123
Rahul Kaiwart, H. Poswal, Subrata Das
{"title":"Calculation of flux for superconducting wavelength shifter based high energy X-ray diffraction beamline BL-15","authors":"Rahul Kaiwart, H. Poswal, Subrata Das","doi":"10.1063/5.0025123","DOIUrl":"https://doi.org/10.1063/5.0025123","url":null,"abstract":"","PeriodicalId":222119,"journal":{"name":"DAE SOLID STATE PHYSICS SYMPOSIUM 2019","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133772940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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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