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Luminescence investigation of red emitting CaAlSiO4F: Eu3+ doped phosphor for white LEDs based on oxyfluoride matrix 基于氟氧基质的白光 LED 用红色发光 CaAlSiO4F：Eu3+ 掺杂荧光粉的发光研究
IF 1.7
Materials Letters: X Pub Date : 2023-12-26 DOI: 10.1016/j.mlblux.2023.100224
Rahul V. Tikale , Abhijeet R. Kadam , D.K. Halwar , S.J. Dhoble
{"title":"Luminescence investigation of red emitting CaAlSiO4F: Eu3+ doped phosphor for white LEDs based on oxyfluoride matrix","authors":"Rahul V. Tikale ,&nbsp;Abhijeet R. Kadam ,&nbsp;D.K. Halwar ,&nbsp;S.J. Dhoble","doi":"10.1016/j.mlblux.2023.100224","DOIUrl":"https://doi.org/10.1016/j.mlblux.2023.100224","url":null,"abstract":"<div><p>A series of Eu<sup>3+</sup>-doped of CaAlSiO<sub>4</sub>F red-emitting phosphors for different concentrations were successfully synthesized by using high temperature solid state diffusion method. The phase identification of the prepared phosphor was recorded using x-ray diffraction (XRD). In PL study, the emission peak of prepared phosphor was located at 595 nm and 618 nm due to <sup>5</sup>D<sub>0</sub> → <sup>7</sup>F<sub>1</sub> and <sup>5</sup>D<sub>0</sub> → <sup>7</sup>F<sub>2</sub> transitions at excitation of 257 nm, 395 nm and 465 nm. Morphological behaviour of prepared sample was analyzed by using scanning electron microscope (SEM). Commission de l'Eclairage chromaticity (CIE) coordinates were analyzed based on the PL emission spectra of the series CaAlSiO<sub>4</sub>F: Eu<sup>3+</sup> activated phosphor. Therefore, these possible outcomes indicate that the CaAlSiO<sub>4</sub>F: Eu<sup>3+</sup> products have great potential applications in solid state lighting industry.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"21 ","pages":"Article 100224"},"PeriodicalIF":1.7,"publicationDate":"2023-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590150823000443/pdfft?md5=9ee8e3f1cbd1da2eef071d4456bea015&pid=1-s2.0-S2590150823000443-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139100575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Separation, identification and anti-Breast cancer efficacy of anthocyanin of Melia dubia bark 杜鹃树皮花青素的分离、鉴定和抗乳腺癌功效
IF 1.7
Materials Letters: X Pub Date : 2023-12-14 DOI: 10.1016/j.mlblux.2023.100223
G. Dayana Jeyaleela , J. Rosaline Vimala
{"title":"Separation, identification and anti-Breast cancer efficacy of anthocyanin of Melia dubia bark","authors":"G. Dayana Jeyaleela ,&nbsp;J. Rosaline Vimala","doi":"10.1016/j.mlblux.2023.100223","DOIUrl":"10.1016/j.mlblux.2023.100223","url":null,"abstract":"<div><p>Numerous antioxidants were extensively found in many plants at different levels which are associated with the therapeutic importance of medicinal plants. The therapeutic impact of the traditional plants <em>Melia dubia's</em> leaves was previously thoroughly explored. The current investigation aimed to examine the biological application of natural antioxidants in the bark extract of <em>Melia Dubia</em> and their effect on breast cancer cells by MTT test. Preliminary phytochemical analysis of six extracts of <em>Melia dubia</em> bark was tested. Anthocyanine compound MDB-1 (isolated compound) is separated from the potential extract (methanol) by combined chromatography methods. On In-vitro analysis, the IC<sub>50</sub> value of MDB-1 on the MCF7 cell line is 18.32 µg/ml which exhibits a cytotoxicity effect on the breast cancer cells. The isolated compound MDB-1 will be further used to develop drug formulations to overcome world challenges in cancer treatment.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"21 ","pages":"Article 100223"},"PeriodicalIF":1.7,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590150823000431/pdfft?md5=342c6f041962c0973fc571cbaf154062&pid=1-s2.0-S2590150823000431-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139021816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of different substrates on microstructural and optoelectrical properties of thermally evaporated CdSe thin films 不同基底对热蒸发硒化镉薄膜微观结构和光电特性的影响
IF 1.7
Materials Letters: X Pub Date : 2023-12-01 DOI: 10.1016/j.mlblux.2023.100222
Chiranji Lal , Jitendra Singh , Devendra Kumar , Prosenjit Sarkar , Pawan Kumar , Ram S Katiyar
{"title":"Effect of different substrates on microstructural and optoelectrical properties of thermally evaporated CdSe thin films","authors":"Chiranji Lal ,&nbsp;Jitendra Singh ,&nbsp;Devendra Kumar ,&nbsp;Prosenjit Sarkar ,&nbsp;Pawan Kumar ,&nbsp;Ram S Katiyar","doi":"10.1016/j.mlblux.2023.100222","DOIUrl":"https://doi.org/10.1016/j.mlblux.2023.100222","url":null,"abstract":"<div><p>Substrates play an important role in influencing the physical properties of any thin film for different applications. The current work provides a brief overview of various substrate effects on CdSe thin film. XRD pattern reveals that CdSe films on FTO are more crystalline. The optical spectrum of CdSe films is highly affected by different substrates. The electrical properties of all samples were investigated using Hall and I-V measurements. CdSe films on FTO show higher electrical conductivity than others.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"20 ","pages":"Article 100222"},"PeriodicalIF":1.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S259015082300042X/pdfft?md5=d23886568b305c2e7f67076017493fde&pid=1-s2.0-S259015082300042X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138559030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Geometrical and electrostatic densities in a highly sparse as-electrospun polystyrene microfiber mat 高度稀疏的静电纺聚苯乙烯微纤维垫的几何和静电密度
IF 1.7
Materials Letters: X Pub Date : 2023-10-20 DOI: 10.1016/j.mlblux.2023.100221
Yuya Ishii
{"title":"Geometrical and electrostatic densities in a highly sparse as-electrospun polystyrene microfiber mat","authors":"Yuya Ishii","doi":"10.1016/j.mlblux.2023.100221","DOIUrl":"https://doi.org/10.1016/j.mlblux.2023.100221","url":null,"abstract":"<div><p>Electromechanically active nano/microfibers are promising components of sensors and actuators; however, piezoelectric polymers are normally expensive. To address this issue, this study examined the geometrical and electrostatic densities of an inexpensive highly sparse as-electrospun atactic polystyrene microfiber mat. The densities of porous individual fibers and the highly sparse fiber mat were experimentally determined to be 0.88 and 0.051 g cm<sup>−3</sup>, respectively, with corresponding material filling ratios of 80 % and 4.7 %, respectively. A high theoretical surface charge density of approximately 1.4 × 10<sup>−3</sup> C m<sup>−2</sup> was determined for the fiber mat after excluding air spaces in both individual fibers and the mat. These findings provide a pathway to outstanding electrets that are ultra-lightweight and have high charge densities.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"20 ","pages":"Article 100221"},"PeriodicalIF":1.7,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2590150823000418/pdfft?md5=a33de31140e295be64d499e6709930d3&pid=1-s2.0-S2590150823000418-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91987285","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Photoluminescence studies of Eu3+ doped bismuth silicate based phosphor for plant grow LEDs Eu3+掺杂硅酸铋基荧光粉用于植物生长led的光致发光研究
IF 1.7
Materials Letters: X Pub Date : 2023-09-29 DOI: 10.1016/j.mlblux.2023.100220
Ekta Chandrawanshi , D.P. Bisen , Nameeta Brahme
{"title":"Photoluminescence studies of Eu3+ doped bismuth silicate based phosphor for plant grow LEDs","authors":"Ekta Chandrawanshi ,&nbsp;D.P. Bisen ,&nbsp;Nameeta Brahme","doi":"10.1016/j.mlblux.2023.100220","DOIUrl":"https://doi.org/10.1016/j.mlblux.2023.100220","url":null,"abstract":"<div><p>Artificial red lights of good quality are essential for indoor plant growth as it has a wide spectrum effects on photosynthesis rate and photomorphogenic processes of organic plant growth cycle. In present work we report on Eu<sup>3+</sup> doped Bi<sub>4</sub>Si<sub>3</sub>O<sub>12</sub> (BSO) phosphor for spectroscopic implication in smart plant grow LEDs. Eu<sup>3+</sup> activated series of Bi<sub>4</sub>Si<sub>3</sub>O<sub>12</sub> phosphor have been prepared via traditional solid-state reaction method. Crystal structure and phase formation characterization is determined by using X-ray diffraction (XRD). Photoluminescence spectra of prepared phosphor shows broad excitation spectra ranging from 200 to 530 nm. The optimal Eu<sup>3+</sup> doping concentration observed at 3 mol%. Emission spectra observed under the excitation of 270 nm shows broad emission band at 469 nm along with other characteristic peak at 500 nm-710 nm. Observed emission peaks at 622 nm, 656 nm and 702 nm were chosen opt for plant grow lights. The phytochrome PFR absorption spectra of plants matches well with the emission band of our Eu<sup>3+</sup> doped BSO phosphor and can be considered as a viable choice for solid state lighting and plant grow light LEDs.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"20 ","pages":"Article 100220"},"PeriodicalIF":1.7,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49742302","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
Wet chemical synthesis of Sm3+ doped Ca10(PO4)6Cl2 phosphor for w-LED application 湿化学合成Sm3+掺杂的w-LED用Ca10(PO4)6Cl2荧光粉
IF 1.7
Materials Letters: X Pub Date : 2023-09-01 DOI: 10.1016/j.mlblux.2023.100214
R.T. Maske , A.N. Yerpude , S.J. Dhoble
{"title":"Wet chemical synthesis of Sm3+ doped Ca10(PO4)6Cl2 phosphor for w-LED application","authors":"R.T. Maske ,&nbsp;A.N. Yerpude ,&nbsp;S.J. Dhoble","doi":"10.1016/j.mlblux.2023.100214","DOIUrl":"10.1016/j.mlblux.2023.100214","url":null,"abstract":"<div><p>Wet chemical technique was used for the Synthesis of Sm<sup>3+</sup> doped Ca<sub>10</sub>(PO<sub>4</sub>)<sub>6</sub>Cl<sub>2</sub> phosphor. The phase purity was analyzed by using X-Ray diffraction (XRD), which show that the synthesized phosphor was well matched with standard PDF file. Photoluminescence properties of Ca<sub>10</sub>(PO<sub>4</sub>)<sub>6</sub>Cl<sub>2</sub>:Sm<sup>3+</sup> phosphor shows emission peak at 563 nm, 607 nm &amp; 646 nm corresponding to <sup>4</sup>G<sub>5/2</sub>→(<sup>6</sup>H<sub>5/2</sub>, <sup>6</sup>H<sub>7/2</sub>, <sup>6</sup>H<sub>9/2</sub>) transition of Sm<sup>3+</sup> ions. The emission spectra of Ca<sub>10</sub>(PO<sub>4</sub>)<sub>6</sub>Cl<sub>2</sub>:Sm<sup>3+</sup> phosphor was very intense and sharp. As per the current investigation of synthesized phosphor, it indicate that it is a used in solid state lighting devices and display application.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"19 ","pages":"Article 100214"},"PeriodicalIF":1.7,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42183687","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
Potential and challenges for large-scale near-net-shaping of 7xxx aerospace grade aluminum via additive friction stir deposition 通过添加剂摩擦搅拌沉积大规模近净成型7xxx航空级铝的潜力和挑战
IF 1.7
Materials Letters: X Pub Date : 2023-09-01 DOI: 10.1016/j.mlblux.2023.100217
Hang Z. Yu, Greg D. Hahn
{"title":"Potential and challenges for large-scale near-net-shaping of 7xxx aerospace grade aluminum via additive friction stir deposition","authors":"Hang Z. Yu,&nbsp;Greg D. Hahn","doi":"10.1016/j.mlblux.2023.100217","DOIUrl":"10.1016/j.mlblux.2023.100217","url":null,"abstract":"<div><p>This letter examines the potential and challenges of using additive friction stir deposition for large-scale near-net-shaping of 7xxx Al alloys, particularly AA7075 and AA7050. Compared to fusion-based additive manufacturing, which is unable to print these alloys without feedstock modification or composition change, additive friction stir deposition is an emerging solid-state additive process with a thermomechanical processing nature that can render fully-dense AA7075 and AA7050 in the as-deposited state. More importantly, wrought-like tensile properties have been demonstrated in the deposited AA7075 based on the original composition. The process is well-suited for large-scale printing due to its high build rate and scalability. Significant challenges nevertheless exist in process and post-process control, in addition to the impurity from lubrication.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"19 ","pages":"Article 100217"},"PeriodicalIF":1.7,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42347565","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
Optimization of dysprosium ions doped borate glasses for photoluminescence applications 用于光致发光应用的掺镝硼酸盐玻璃的优化
IF 1.7
Materials Letters: X Pub Date : 2023-09-01 DOI: 10.1016/j.mlblux.2023.100208
Manjeet , Ravina , Amit , Kanishk Poria , Nisha Deopa , Anand Kumar , R.P. Chahal
{"title":"Optimization of dysprosium ions doped borate glasses for photoluminescence applications","authors":"Manjeet ,&nbsp;Ravina ,&nbsp;Amit ,&nbsp;Kanishk Poria ,&nbsp;Nisha Deopa ,&nbsp;Anand Kumar ,&nbsp;R.P. Chahal","doi":"10.1016/j.mlblux.2023.100208","DOIUrl":"10.1016/j.mlblux.2023.100208","url":null,"abstract":"<div><p>In this report, we present a comprehensive explanation of the luminescent features of Dy<sup>3+</sup>-ions doped Zinc Sodium Lead Borate (ZnNaPbB) glasses through various characterizations like UV–Vis-NIR, absorption and emission spectroscopy. The absorption spectra were used to determine the optical bandgap (E<sub>opt</sub>) and Urbach energy (ΔE). The emission spectra are dominated by three peaks (strong yellow, blue and weak red) in the visible range at 481 nm, 575 nm and 664 nm. The CIE coordinates lie in the pure white region of the chromaticity diagram indicating that the as-prepared glasses have possible applications for optoelectronic devices.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"19 ","pages":"Article 100208"},"PeriodicalIF":1.7,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43099541","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
Formulation of calcium based 8-HQ fluorescent paint for fluorescent paint applications 用于荧光涂料应用的钙基8-HQ荧光涂料的配方
IF 1.7
Materials Letters: X Pub Date : 2023-09-01 DOI: 10.1016/j.mlblux.2023.100211
Ritesh Raikundliya , N. Thejo Kalyani , S.J. Dhoble
{"title":"Formulation of calcium based 8-HQ fluorescent paint for fluorescent paint applications","authors":"Ritesh Raikundliya ,&nbsp;N. Thejo Kalyani ,&nbsp;S.J. Dhoble","doi":"10.1016/j.mlblux.2023.100211","DOIUrl":"10.1016/j.mlblux.2023.100211","url":null,"abstract":"<div><p>We report the formulation of luminous paints with calcium-based quinoline complex, bis(8-hydroxyquinoline) (calcium) – Caq<sub>2</sub> as a pigment (where Ca = Calcium, q = 8-hydroxy quinoline). Fourier transform infrared (FTIR) spectra, UV–Visible absorption, Photoluminescence (PL) spectra and photometric evaluation of the pigment were probed to evaluate its structural, optical and photometric properties. The excitation spectra of Caq<sub>2</sub> pigment portrays a broad excitation peak at 370 nm, while emission spectra reveal a broad peak, registered at 473 nm which falls in the bluish-green region of the visible spectrum. Further, fluorescent paints were formulated on glass slides with epoxy resin/ urea formaldehyde as binder and toluene as solvent. The results reveal the change in intensity of the painted panels in the following order I<sub>ZnO Epoxy(50%)</sub> &gt; I<sub>Epoxy</sub> based pure pigment &gt; I<sub>UF</sub> based pure pigment &gt; I<sub>ZnO Epoxy(10%)</sub> &gt; I<sub>ZnO UF(10%)</sub>. These results reveal the potential of the pigment as one of the components of fluorescent paint.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"19 ","pages":"Article 100211"},"PeriodicalIF":1.7,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44148187","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
Thermal diffusivity measurement of undoped Yb2O3 oxide by self-made photoacoustic cell 自制光声电池测量未掺杂氧化钇的热扩散率
IF 1.7
Materials Letters: X Pub Date : 2023-09-01 DOI: 10.1016/j.mlblux.2023.100213
Minarul I. Sarkar, Kaushal Kumar
{"title":"Thermal diffusivity measurement of undoped Yb2O3 oxide by self-made photoacoustic cell","authors":"Minarul I. Sarkar,&nbsp;Kaushal Kumar","doi":"10.1016/j.mlblux.2023.100213","DOIUrl":"10.1016/j.mlblux.2023.100213","url":null,"abstract":"<div><p>Photoacoustic spectroscopy is an essential technique for material characterization by measuring acoustic noise inside a cell. In this work, we have fabricated a photoacoustic cell and a pre-amplifier circuit and optimized both for maximum sensitivity. The cavity volume is measured ∼4.90 × 10<sup>−6</sup> m<sup>3</sup> at optimum condition. After that, the thermal diffusivity of undoped ytterbium oxide is measured by recording photoacoustic voltages. It is found 42.22–44.90 mm<sup>2</sup>/s for the excitation pump power 150–300 mW range by 980 nm diode laser source.</p></div>","PeriodicalId":18245,"journal":{"name":"Materials Letters: X","volume":"19 ","pages":"Article 100213"},"PeriodicalIF":1.7,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49153044","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
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