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Red luminescence from La2O3:Eu3+ nanophosphor prepared by Sol-Gel method 溶胶-凝胶法制备的La2O3:Eu3+纳米荧光粉的红色发光
IF 1.7
Materials Letters: X Pub Date : 2023-06-01 DOI: 10.1016/j.mlblux.2023.100205
Pushpa N , M.K. Kokila , K.R. Nagabhushana
{"title":"Red luminescence from La2O3:Eu3+ nanophosphor prepared by Sol-Gel method","authors":"Pushpa N ,&nbsp;M.K. Kokila ,&nbsp;K.R. Nagabhushana","doi":"10.1016/j.mlblux.2023.100205","DOIUrl":"10.1016/j.mlblux.2023.100205","url":null,"abstract":"<div><p>Pure and Eu<sup>3+</sup> doped La<sub>2</sub>O<sub>3</sub> nanophosphor was synthesized by sol gel process. PL spectra of undoped La<sub>2</sub>O<sub>3</sub> samples shows broad emission peaks between 400 and 600 nm and Eu<sup>3+</sup> doped samples show PL emission peaks at 510, 515, 531, 537, 553, 578, 585, 594, 612 and 624 nm. These peaks are attributed to <sup>5</sup>D<sub>1</sub> → <sup>7</sup>F<sub>2</sub>, <sup>5</sup>D<sub>1</sub> → <sup>7</sup>F<sub>2</sub>, <sup>5</sup>D<sub>0</sub> → <sup>7</sup>F<sub>0</sub>, <sup>5</sup>D<sub>0</sub> → <sup>7</sup>F<sub>1</sub>,<sup>5</sup>D<sub>0</sub> → <sup>7</sup>F<sub>2</sub> transitions of Eu<sup>3 +</sup> ions. The electronic dipole transition corresponding to<sup>5</sup>D<sub>0</sub> → <sup>7</sup>F<sub>2</sub> (624, 612 nm) is stronger than the magnetic dipole transition of <sup>5</sup>D<sub>0</sub> → <sup>7</sup>F<sub>1</sub> (585, 594 nm) of Eu<sup>3+</sup> ions. Luminescence behavior of Eu<sup>3+</sup> in La<sub>2</sub>O<sub>3</sub> is analyzed by Judd–Ofelt intensity parameters.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"18 ","pages":"Article 100205"},"PeriodicalIF":1.7,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45123390","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 the hall effect and DC conductivity of CdSe and Te doped CdSe thin films prepared by RF magnetron sputtering method 射频磁控溅射法制备CdSe和Te掺杂CdSe薄膜的霍尔效应和直流电导率研究
IF 1.7
Materials Letters: X Pub Date : 2023-06-01 DOI: 10.1016/j.mlblux.2023.100204
Devendra Kumar , Chiranji Lal , Dharm Veer , Deshraj Singh , Pawan Kumar , Ram S. Katiyar
{"title":"Study the hall effect and DC conductivity of CdSe and Te doped CdSe thin films prepared by RF magnetron sputtering method","authors":"Devendra Kumar ,&nbsp;Chiranji Lal ,&nbsp;Dharm Veer ,&nbsp;Deshraj Singh ,&nbsp;Pawan Kumar ,&nbsp;Ram S. Katiyar","doi":"10.1016/j.mlblux.2023.100204","DOIUrl":"10.1016/j.mlblux.2023.100204","url":null,"abstract":"<div><p>CdSe and CdSe:Te thin films were grown on Si p-type substrates by RF magnetron sputtering method. The doping percentage of Tellurium (Te) in CdSe was 7% for the CdSe:Te thin film. The results show that after the doping of Te in the CdSe thin film, the conductivity changes from n-type to p-type and the mobility of the CdSe thin film increased. The conductivity of Te doped CdSe was found to be in order of 10<sup>−6</sup> Ω<sup>−1</sup> cm<sup>−1</sup>, while without doping it was 10<sup>−5</sup> Ω<sup>−1</sup> cm<sup>−1</sup>. X-ray diffraction (XRD) confirmed the presence of CdSe, Te and Si.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"18 ","pages":"Article 100204"},"PeriodicalIF":1.7,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43936982","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
Effect of 100 MeV Ni7+ ion irradiation on photoluminescence of α-A 100MeV Ni7+离子辐照对α-A<mml:mi-mathva光致发光的影响
IF 1.7
Materials Letters: X Pub Date : 2023-05-01 DOI: 10.1016/j.mlblux.2023.100199
K. R. Nagabhushana, H. Lokesha, S. Satyanarayana Reddy, N. Thejavathi, F. Singh
{"title":"Effect of 100 MeV Ni7+ ion irradiation on photoluminescence of α-A","authors":"K. R. Nagabhushana, H. Lokesha, S. Satyanarayana Reddy, N. Thejavathi, F. Singh","doi":"10.1016/j.mlblux.2023.100199","DOIUrl":"https://doi.org/10.1016/j.mlblux.2023.100199","url":null,"abstract":"","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":" ","pages":""},"PeriodicalIF":1.7,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44230532","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
Americium doping induced self irradiation of SrBPO5: 241Am: Spectroscopic insight 掺汞诱导SrBPO5:241Am的自辐射：光谱透视
IF 1.7
Materials Letters: X Pub Date : 2023-03-01 DOI: 10.1016/j.mlblux.2023.100185
M. Mohapatra , Santosh K. Gupta
{"title":"Americium doping induced self irradiation of SrBPO5: 241Am: Spectroscopic insight","authors":"M. Mohapatra ,&nbsp;Santosh K. Gupta","doi":"10.1016/j.mlblux.2023.100185","DOIUrl":"10.1016/j.mlblux.2023.100185","url":null,"abstract":"<div><p>In the present work, <sup>241</sup>Am incorporated in SrBPO<sub>5</sub> (SBP) host matrix was investigated by various spectroscopic techniques to understand the trap level spectroscopic properties of the system. Photoluminescence (PL) depicted stabilization of Am in +3 oxidation state with low local symmetry. Thermoluminescence (TL) on the other hand suggested that creation of self irradiated defects in SBP:<sup>241</sup>Am leads to a glow curve around 463 K. Electron spin resonance (ESR) further confirmed the creation of borate radical in axial symmetry on doping ‘Am’ in SBP with hyperfine splitting. We could further propose the mechanism of TL glow curve on doping Am in the SBP lattice.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"17 ","pages":"Article 100185"},"PeriodicalIF":1.7,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42826823","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
Optical characteristics and biosensing application of core@shell nanomaterials core@shell纳米材料的光学特性及生物传感应用
IF 1.7
Materials Letters: X Pub Date : 2023-03-01 DOI: 10.1016/j.mlblux.2023.100187
Sarita Shaktawat , Kshitij RB Singh , Sushma Thapa , Ranjana Verma , Jay Singh , Ravindra Pratap Singh
{"title":"Optical characteristics and biosensing application of core@shell nanomaterials","authors":"Sarita Shaktawat ,&nbsp;Kshitij RB Singh ,&nbsp;Sushma Thapa ,&nbsp;Ranjana Verma ,&nbsp;Jay Singh ,&nbsp;Ravindra Pratap Singh","doi":"10.1016/j.mlblux.2023.100187","DOIUrl":"10.1016/j.mlblux.2023.100187","url":null,"abstract":"<div><p>Core@shell nanomaterials are a class of materials containing a core and a shell, both at the nanometer scale, as they have become a consequential research interest owing to their optical, electrical, and magnetic properties. Moreover, various core@shell nanomaterials have also emerged in many other fields, such as catalysis, pharmaceuticals, and biomedical due to their less toxicity, surface area, good biocompatibility, adequate penetration power for biological tissue, and selectivity for target molecules. Hence, this review covers the optical properties of core@shell nanomaterials and biosensors based on various core@shell nanomaterials, for example, inorganic@inorganic (Au@Ag), organic@inorganic (polyurethane@Au), inorganic@organic (CeO<sub>2</sub>@polyaniline), and organic@organic (poly(vinylidene difluoride)@dopamine) for biomedical applications; along with this, it also discusses the advantage and disadvantage of core@shell nanomaterials.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"17 ","pages":"Article 100187"},"PeriodicalIF":1.7,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42898133","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
Data-driven predictive modeling of FeCrAl oxidation 数据驱动的FeCrAl氧化预测建模
IF 1.7
Materials Letters: X Pub Date : 2023-03-01 DOI: 10.1016/j.mlblux.2023.100183
Indranil Roy, Subhrajit Roychowdhury, Bojun Feng, Sandipp Krishnan Ravi, Sayan Ghosh, Rajnikant Umretiya, Raul B. Rebak, Daniel M. Ruscitto, Vipul Gupta, Andrew Hoffman
{"title":"Data-driven predictive modeling of FeCrAl oxidation","authors":"Indranil Roy,&nbsp;Subhrajit Roychowdhury,&nbsp;Bojun Feng,&nbsp;Sandipp Krishnan Ravi,&nbsp;Sayan Ghosh,&nbsp;Rajnikant Umretiya,&nbsp;Raul B. Rebak,&nbsp;Daniel M. Ruscitto,&nbsp;Vipul Gupta,&nbsp;Andrew Hoffman","doi":"10.1016/j.mlblux.2023.100183","DOIUrl":"10.1016/j.mlblux.2023.100183","url":null,"abstract":"<div><p>FeCrAl alloys are among the most promising candidates for accident-tolerant fuel cladding material in light water nuclear reactors. Despite their high-temperature oxidation resistance in corrosive environments coupled with their hydrothermal corrosion resistance, a key challenge remains in optimizing the composition of the alloy that can be achieved through statistical analysis. However, the current literature on FeCrAl alloy design lack studies for designing alloys based on oxidation resistance. This study addresses that gap by developing a predictive model for the oxidation of FeCrAl alloys based on an experimental dataset, which lays the groundwork for model-based optimization for alloy composition.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"17 ","pages":"Article 100183"},"PeriodicalIF":1.7,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46337657","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: 3
Fabrication and characterization of Al/Ta thin films as metal junctions for solar cell applications 太阳能电池金属结Al/Ta薄膜的制备与表征
IF 1.7
Materials Letters: X Pub Date : 2023-03-01 DOI: 10.1016/j.mlblux.2022.100174
Kamil Monga , Larak Labbafi , Harshita Trivedi , Zohreh Ghorannevis , Avanish Singh Parmar , Shilpi Chaudhary
{"title":"Fabrication and characterization of Al/Ta thin films as metal junctions for solar cell applications","authors":"Kamil Monga ,&nbsp;Larak Labbafi ,&nbsp;Harshita Trivedi ,&nbsp;Zohreh Ghorannevis ,&nbsp;Avanish Singh Parmar ,&nbsp;Shilpi Chaudhary","doi":"10.1016/j.mlblux.2022.100174","DOIUrl":"10.1016/j.mlblux.2022.100174","url":null,"abstract":"<div><p>In the present work, the effect of deposition time (10 min, 20 min, and 30 min) on the structural, morphological, and electrical properties of Al/Ta thin films has been investigated. The XRD and microscopy results revealed that the thin films exhibit a bcc structure, with a strong (1<!--> <!-->1<!--> <!-->0) preferred orientation and followed a columnar growth with grain sizes lower than 100 nm. Thin film with 20-min deposition time exhibits less average roughness and better morphology than 10-min and 30-min. Further, the average resistance was smallest for thin films with 20-min of deposition time along with the optical reflectance between 50 and 85% in wavelength region of 400–1000 nm. The Al/Ta thin film can be employed as an excellent back-contact material for thinfilm solar cells due to its improved crystallinity, reflectance, and lower resistivity.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"17 ","pages":"Article 100174"},"PeriodicalIF":1.7,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46634861","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
A titanium dioxide-based thick film gas sensor for propanol 一种基于二氧化钛的丙醇厚膜气体传感器
IF 1.7
Materials Letters: X Pub Date : 2023-03-01 DOI: 10.1016/j.mlblux.2023.100184
Ankit Kumar Vishwakarma , Ajaya Kumar Sharma , Ashok Kumar Mishra , Lallan Yadava
{"title":"A titanium dioxide-based thick film gas sensor for propanol","authors":"Ankit Kumar Vishwakarma ,&nbsp;Ajaya Kumar Sharma ,&nbsp;Ashok Kumar Mishra ,&nbsp;Lallan Yadava","doi":"10.1016/j.mlblux.2023.100184","DOIUrl":"10.1016/j.mlblux.2023.100184","url":null,"abstract":"<div><p>In the present paper, we reported the sensing behavior and mechanism of a titanium dioxide-based thick film sensor for the detection of propanol at room temperature. Undoped titanium dioxide (UTO) and 2 wt% cadmium sulfide doped titanium dioxide (CdTO) thick film samples are fabricated on an alumina substrate. The response of the fabricated samples is measured with varying concentrations of propanol (0–5000 ppm) in a testing chamber at room temperature. The measurement showed that the 2 wt% CdS doped sample showed a maximum response (63 %) for propanol. The transient response is also measured and the response time is 65 s and recovery 195 s.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"17 ","pages":"Article 100184"},"PeriodicalIF":1.7,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48346451","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
Size dependent photocatalytic activities of rod-shape SnO2 nanocrystals 棒状SnO2纳米晶体的尺寸依赖性光催化活性
IF 1.7
Materials Letters: X Pub Date : 2023-03-01 DOI: 10.1016/j.mlblux.2023.100186
I-Che Li, Tsung-Wei Zeng
{"title":"Size dependent photocatalytic activities of rod-shape SnO2 nanocrystals","authors":"I-Che Li,&nbsp;Tsung-Wei Zeng","doi":"10.1016/j.mlblux.2023.100186","DOIUrl":"10.1016/j.mlblux.2023.100186","url":null,"abstract":"<div><p>Various rod-shape SnO<sub>2</sub> nanocrystals of different sizes and shapes were synthesized to study the desirable morphology for photocatalytic applications. An optimal apparent photocatalytic rate constant of 0.0809/min<sup>−1</sup> was achieved for smaller SnO<sub>2</sub> nanorods with diameter of ∼2.9 nm and with length of ∼9.3 nm, which is attributed to suitable nanostructures and high crystallinity. Photocatalytic activities as a function of growth and evolution of SnO<sub>2</sub> nanorods are revealed.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"17 ","pages":"Article 100186"},"PeriodicalIF":1.7,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49641521","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: 3
Synthesis and characterization of nanostructured silica powders using rice hull ash-based sodium silicate solution by precipitation and calcination 稻壳灰基水玻璃溶液沉淀法和煅烧法合成纳米二氧化硅粉体及表征
IF 1.7
Materials Letters: X Pub Date : 2023-03-01 DOI: 10.1016/j.mlblux.2022.100175
Emie Salamangkit Mirasol , Masaru Shimomura
{"title":"Synthesis and characterization of nanostructured silica powders using rice hull ash-based sodium silicate solution by precipitation and calcination","authors":"Emie Salamangkit Mirasol ,&nbsp;Masaru Shimomura","doi":"10.1016/j.mlblux.2022.100175","DOIUrl":"10.1016/j.mlblux.2022.100175","url":null,"abstract":"<div><p>Herein, characteristics of the nanostructured silica powders (NsSP) synthesized from Philippine rice hull ash-based sodium silicate solution by precipitation (pH 2, pH 6) and calcination (600 °C, 900 °C) were presented. Characterizations confirmed that the synthesized NsSP contains high amount of SiO<sub>2</sub>. NsSP obtained at pH 2 revealed higher mass losses by ∼ 12 % until 900 °C and higher intensities of –OH and Si–OH bonds than obtained at pH 6. Calcination of NsSP at 900 °C removes the Si–OH bond leading to a relative growth in the SiO<sub>2</sub> primary particles but SiO<sub>2</sub> structure remained amorphous. Morphology of NsSP obtained at pH 2 were cloud-like while NsSP obtained at pH 6 were bead-like and more distinct.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"17 ","pages":"Article 100175"},"PeriodicalIF":1.7,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47780616","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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