Journal of Luminescence最新文献

{"title":"Broadband 1.45–2.1 μm luminescence in Er3+/Tm3+/Yb3+ tri-doped bismuth-germanate glasses","authors":"Hüseyin Can Çamiçi,&nbsp;V.A.G. Rivera,&nbsp;Théo Guérineau,&nbsp;Sophie LaRochelle,&nbsp;Younès Messaddeq","doi":"10.1016/j.jlumin.2024.120929","DOIUrl":"10.1016/j.jlumin.2024.120929","url":null,"abstract":"<div><div>Optical properties of novel Er³⁺-doped, Er³⁺/Yb³⁺ and Er³⁺/Tm³⁺ co-doped and Er³⁺/Tm³⁺/Yb³⁺ tri-doped bismuth-germanate glasses were fabricated. Thermal characterization by differential scanning calorimetry showed the suitability of the glass for fiber drawing. Tri-doped sample presented a broadband luminescence spectrum ranging from 1450 to 2100 nm when it was excited by 980 and 1480 nm laser diodes. Energy transfer mechanisms from the donor (Yb³⁺, Er³⁺) to acceptor (Er³⁺, Tm³⁺) ions were found out to be the cause of the intense luminescence with broad bandwidth which can be tailored through doping content and concentration. It was observed that the Tm³⁺ addition helps broadening the luminescence spectrum, while the Yb³⁺ incorporation enhances the emission intensity. This study provides insightful contributions to the possibility of signal amplification in L + U-bands and beyond, up to 2100 nm.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"277 ","pages":"Article 120929"},"PeriodicalIF":3.3,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142423419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Judd-Ofelt analysis and temperature sensing properties of polyethylmethacrylate (PEMA) networks doped with CdNb2O6: Er3+/Yb3+ phosphors","authors":"Thami Buhari,&nbsp;Demet Kaya Aktaş,&nbsp;Murat Erdem,&nbsp;Gönül Eryürek","doi":"10.1016/j.jlumin.2024.120928","DOIUrl":"10.1016/j.jlumin.2024.120928","url":null,"abstract":"<div><div>Research on the sensitivity of temperature measurements and optical thermometry involving rare earth ions has been an area of interest in the field of photonics and materials science. Introducing polymer networks as a new host material has an important role due to their properties including a versatile and stable environment for rare earth ions and rapid response in temperature detection. In this work, linear and crosslinked polyethylmethacrylate (PEMA) networks doped with Er³⁺/Yb³⁺ (1.5 mol % Er³⁺, 2 mol% Yb³⁺) synthesized by free-radical crosslinking polymerization with 0.1 EMA (weight %) at 60 °C were used to investigate direct and indirect optical bandgap energies and Urbach energy from UV–Visible spectra. The Judd-Ofelt (JO) approach was employed to analyze parameters <em>Ω</em>_<em>t</em> (<em>t</em> = 2,4,6), spontaneous transition probabilities (<em>Α</em>), branching ratios (<em>β</em>) and radiative lifetimes (<em>τ</em>) as a function of linear and crosslinked PEMA doped nano-crystalline CdNb₂O₆: Er³⁺/Yb³⁺. The stimulated emission cross-sections of the transitions ²H_11/2⟶⁴I_15/2, ²S_3/2⟶⁴I_15/2 and ²F_9/2⟶⁴I_15/2 of Er³⁺/Yb³⁺ were calculated by two different methods; Fuchtbauer-Ladenburg formula and modified theory, respectively. The gain bandwidth cross-section product for the ²H_11/2⟶⁴I_15/2 was found to be 162.06. <span><math><mrow><msup><mn>10</mn><mrow><mo>−</mo><mn>28</mn></mrow></msup><msup><mtext>cm</mtext><mn>3</mn></msup></mrow></math></span>, 260.94. <span><math><mrow><msup><mn>10</mn><mrow><mo>−</mo><mn>28</mn></mrow></msup><msup><mtext>cm</mtext><mn>3</mn></msup></mrow></math></span> and 461.20. <span><math><mrow><msup><mn>10</mn><mrow><mo>−</mo><mn>28</mn></mrow></msup><msup><mtext>cm</mtext><mn>3</mn></msup></mrow></math></span> of Er³⁺/Yb³⁺ embedded in linear, low and high crosslinked PEMA samples, respectively. JO parameters and stimulated emission cross-sections increased; therefore, radiative lifetimes decreased by increasing crosslinking content. In addition, the temperature dependence of upconversion (UC) luminescence was monitored under 975 nm excitation. The fluorescence intensity ratio (FIR) method examined the temperature sensing under two thermally coupled levels at 525 and 548 nm. The maximum sensitivities obtained from the FIR technique within the 300–650 K temperature range shifted to lower temperatures with increasing crosslinker content. Hence, linear and crosslinked polymer hosts doped rare-earth ions can be candidates for remote temperature sensors across various fields.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"277 ","pages":"Article 120928"},"PeriodicalIF":3.3,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142423422","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Structural and optical properties of Ce-stabilized tetragonal phase and intense blue emission of monoclinic phase in ZrO2 nanoparticles","authors":"P.V. Jithin ,&nbsp;Aswathi Dhamodaran ,&nbsp;K.P. Prajisha ,&nbsp;Shradha Suman ,&nbsp;K.J. Sankaran ,&nbsp;Ade Ramesh ,&nbsp;Sudheendran K ,&nbsp;Joji Kurian","doi":"10.1016/j.jlumin.2024.120933","DOIUrl":"10.1016/j.jlumin.2024.120933","url":null,"abstract":"<div><div>Structural and optical properties of Ce-stabilized tetragonal zirconium dioxide (ZrO2) and intense blue emission of monoclinic ZrO2 are presented in this paper. Nanoparticles of ZrO2 in the stabilized tetragonal and monoclinic phases have been prepared by the solution combustion method. X-ray diffraction studies and Rietveld refinement of the diffraction pattern show the stabilization of ZrO2 in the tetragonal phase (t-ZrO2) with Ce doping. It is the host-dopant ionic size mismatch that leads to lattice distortion and hence the t-ZrO2 stabilized phase. Raman modes confirm the phase transformation from the monoclinic to a tetragonal phase of ZrO2. The presence of oxygen vacancies and surface states in the samples play a role in altering the optical band gap. The dopant Ce-ions create defects/oxygen vacancies, which act as the trapping sites for electrons and holes/the donor and vacancy-related impurity levels. It is transition between these levels or between delocalized conduction bands that lead to band gap reduction. Photoluminescence studies reveal the presence of structural phase transformation dependent emission bands. The monoclinic phase (m-ZrO2) exhibits an intense blue emission originating from the asymmetric and unusual oxygen coordination of Zr in the m-ZrO2. The chromaticity coordinates indicate that the prepared material and adopted strategies are suitable in the field of optoelectronic application.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"277 ","pages":"Article 120933"},"PeriodicalIF":3.3,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142438009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Ligand-to-Metal Energy Transfer in terbium and europium oxalate heptahydrate crystals: Understanding the influence of oxalate ligand on the photoluminescent properties","authors":"Rodolfo E. López ,&nbsp;Oscar G. ,&nbsp;Francisco J. Davila ,&nbsp;Esmeralda L. Martínez ,&nbsp;Gerardo González-García ,&nbsp;Dulce Y. Medina ,&nbsp;Ángel de Jesús Morales ,&nbsp;Roberto Escudero ,&nbsp;Ignacio A. Figueroa","doi":"10.1016/j.jlumin.2024.120925","DOIUrl":"10.1016/j.jlumin.2024.120925","url":null,"abstract":"<div><div>The intense green and red emission of terbium and europium oxalates are attributed to the cross-relaxation process between lanthanide ions. However, the role of the organic ligand as a sensitizing agent for the emission has not been fully elucidated, leaving the photoluminescent (PL) properties relatively unexplored. This work presents a comprehensive study of the Ligand-to-Metal Energy Transfer (LMET) in terbium and europium oxalates heptahydrate. Single crystals were grown using the hydro-silica gel technique, and a novel improvement of the synthesis procedure which allowed growing substantially larger europium oxalate crystals than in previous studies in the field is also reported. X-ray diffraction (XRD), Fourier-Transform Infrared spectroscopy (FTIR), and thermogravimetric analysis confirmed the chemical composition RE₂(C₂O₄)₃⋅7H₂O. PL studies provided reliable evidence of a sensitized emission via the antenna effect, indicating that the LMET contributes to the population of the ⁵D_<em>j</em> emissive levels of Ln³⁺ ions, assisting the cross-relaxation process. These findings enhance our understanding of the PL properties of terbium and europium oxalates and demonstrate that the oxalate ligand is a more effective luminescent sensitizer for Tb³⁺ ions than for Eu³⁺ ions. Additionally, PL excitation studies on terbium and europium oxalate decahydrate crystals were conducted to contrast the emission properties between both forms of hydrate oxalates. Notably, terbium oxalate heptahydrate crystals exhibit a significant improvement in the Charge Transfer (CT) due to higher intramolecular charge transfer.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"277 ","pages":"Article 120925"},"PeriodicalIF":3.3,"publicationDate":"2024-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142423550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"The enhancing luminescence of B2O3-doped SrAl2O4: Eu2+, Dy3+ single crystals","authors":"Shanshan Ye ,&nbsp;Haibo Lin ,&nbsp;Qifan Zhang ,&nbsp;Yijing Su ,&nbsp;Xiao Tang ,&nbsp;Wen Deng ,&nbsp;Dingkang Xiong","doi":"10.1016/j.jlumin.2024.120920","DOIUrl":"10.1016/j.jlumin.2024.120920","url":null,"abstract":"<div><div>A series of 1.5–3.5 mol% B₂O₃-doped SrAl₂O₄: Eu²⁺, Dy³⁺ single crystals were successfully grown by the optical floating zone method for the first time. XRD and Raman spectroscopy revealed that the samples were monoclinic, with good crystallinity and no phase transition. The cell refinement results indicate that the cell volume decreases with B³⁺ ions. The intensities of both the excitation and emission characteristics of the crystal samples were enhanced after the incorporation of B³⁺, surpassing those observed in pure SrAl₂O₄: Eu²⁺, Dy³⁺ crystals. This enhancement is attributed to the facilitated entry of Eu²⁺ into the lattice upon B³⁺ addition, resulting in an increased number of 4f⁶5 d¹-4f⁷ charge transfer transitions. Long afterglow lifetime spectra disclosed that samples with 3 mol% B₂O₃ concentration achieved the longest afterglow duration, extending up to 139 s, whereas samples lacking B₂O₃ lasted 34 s. Thermoluminescence analysis showed that defect concentration escalated with B³⁺ concentration increments, reaching a maximum at the 3 mol% B₂O₃, beyond which it declined. Finally, the long afterglow luminescence mechanism proposed by Dorenbos is further explained and confirmed. It is concluded that B³⁺ doping increases the defect concentration by altering the crystal's microstructure, which in turn enhances both the luminescence performance and the long afterglow performance of the SrAl₂O₄: Eu²⁺, Dy³⁺ single crystal.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"277 ","pages":"Article 120920"},"PeriodicalIF":3.3,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142423417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Improving photoluminescence properties of lead-free Cs4SnBr6 zero-dimensional perovskite via Mn2+/Sb3+ Co-doping","authors":"Yaqian Huang,&nbsp;Xinye Lu,&nbsp;Haixia Wu,&nbsp;Jisheng Xu,&nbsp;Zhenxu Lin,&nbsp;Yanqing Guo,&nbsp;Rui Huang","doi":"10.1016/j.jlumin.2024.120930","DOIUrl":"10.1016/j.jlumin.2024.120930","url":null,"abstract":"<div><div>Zero-dimensional tin-based halide perovskites have emerged as promising materials for optoelectronic applications owing to their outstanding optical properties. However, improving their PL efficiency and stability remains a significant challenge. Here, we demonstrate a novel codoping strategy by introducing Mn²⁺/Sb³⁺ ions to enhance both the PL intensity and thermal stability of Cs₄SnBr₆ perovskites. Our experiments reveal that Mn²⁺/Sb³⁺ incorporation increases light emission from self-trapped excitons (STEs) in Cs₄SnBr₆, achieving a PL quantum yield of approximately 67.7 %. Additionally, the doped samples show remarkable thermal stability. Detailed analyses, including X-ray diffraction, energy-dispersive spectroscopy, time-resolved PL, and temperature-dependent PL, suggest that the improved emission is driven by Mn²⁺/Sb³⁺-induced distortion of the [SnBr₆]^4- octahedra, which strengthens electron-phonon coupling and increases STE binding energy.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"277 ","pages":"Article 120930"},"PeriodicalIF":3.3,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142423450","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"α-Sr2SiO4:Ce3+, Dy3+, Na+ phosphors with abnormal thermal quenching properties for solid-state lighting applications","authors":"Zhenyu Lei ,&nbsp;Junxin Wang ,&nbsp;Bin Hui ,&nbsp;Han Si ,&nbsp;Zixin Liu ,&nbsp;Cuijiao Zhao ,&nbsp;Peng Cao ,&nbsp;Dechao Yu ,&nbsp;Saifang Huang","doi":"10.1016/j.jlumin.2024.120931","DOIUrl":"10.1016/j.jlumin.2024.120931","url":null,"abstract":"<div><div>There is urgent need of thermally stable phosphors for fabricating high-performance white light emitting diodes (LEDs). In this paper, Sr₂SiO₄:0.02Ce³⁺,xDy³⁺, (0.02+x)Na⁺ phosphors were successfully synthesized by the solid-state reaction method and their luminescence properties were studied. Phase analysis shows that single-phasic α-Sr₂SiO₄ was prepared when <em>x</em> was greater than 0.006, while a mixed phase of α-Sr₂SiO₄ and β-Sr₂SiO₄ were obtained in the samples with <em>x</em> of 0.006 or less. When excited at 344 nm, there is a major emission band at 380–500 nm corresponding to the 5d-4f transition of Ce³⁺, and other emission peaks with a dominated one at 575 nm corresponding to the ⁴F_9/2-⁶H_13/2 transition of Dy³⁺. The as-developed Sr₂SiO₄:Ce³⁺,Dy³⁺,Na⁺ phosphors exhibit excellent thermal stability. To be specific, the intensity retention rate of 425 and 572 nm at 300 °C is as high as 103.6 % and 89.2 %, respectively. Furthermore, near-ultraviolet (nUV) chip-pumped white LED prototypes were assembled using the co-activated phosphor and commercial green and red phosphors, which demonstrate its great potential in high-power white LEDs for solid-state lighting applications.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"277 ","pages":"Article 120931"},"PeriodicalIF":3.3,"publicationDate":"2024-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142423552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Broadened and enhanced MIR emission in Yb3+/Er3+/Dy3+ triply-doped CaYAlO4 crystal","authors":"Yunyun Liu ,&nbsp;Fei Pan ,&nbsp;Yan Wang ,&nbsp;Meng Wang ,&nbsp;Huan Shen ,&nbsp;Chuanxin Huang ,&nbsp;Chaoyang Tu","doi":"10.1016/j.jlumin.2024.120927","DOIUrl":"10.1016/j.jlumin.2024.120927","url":null,"abstract":"<div><div>Yb³⁺/Er³⁺/Dy³⁺ triply-doped CaYAlO₄ single crystal was successfully grown to obtain the broadened and enhanced 3 μm MIR emission. The structure characters were studied by XRD measurement. The optical properties and energy transfer mechanism between Yb³⁺, Er³⁺, and Dy³⁺ were investigated according to the measured absorption spectra, emission spectra, and fluorescence decay curves. The absorption spectra show that the triply-doped crystal could be effective pumped by 980 nm due to the introduced of Yb³⁺ and Er³⁺. In comparison with Dy³⁺ singly-doped CaYAlO₄ crystal, a broadened and enhanced ∼3 μm MIR emission with a full width at half maximum (FWHM) of 286 nm was obtained due to the fact that there exists effective energy transfer process from Yb³⁺ and Er³⁺ to Dy³⁺. For Yb³⁺, it serves as an effective sensitized ion. For Er³⁺, it could be not only used as an effective sensitized ion, but also as a 2.7 μm MIR emission center. For Dy³⁺, it serves as a deactivating ion to solve the self-termination “bottleneck” effect of Er³⁺, and more importantly, as an emission center to achieve 3 μm emission. The comprehensive effect is to obtain enhanced and broadened MIR emission in the triply-doped crystal. In addition, the corresponding energy transfer efficiency from Yb³⁺: ²F_5/2 to Dy³⁺: ⁶H_5/2 is as high as 90 %. Hence, the Yb³⁺/Er³⁺/Dy³⁺: CaYAlO₄ crystal could be used as promising medium for MIR broadband tunable laser applications.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"277 ","pages":"Article 120927"},"PeriodicalIF":3.3,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142423418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Theoretical investigation of enhanced nonlinear optical properties of silicene and carbon nanotubes: Potential applications in infrared and ultraviolet optoelectronics","authors":"Raad Chegel","doi":"10.1016/j.jlumin.2024.120923","DOIUrl":"10.1016/j.jlumin.2024.120923","url":null,"abstract":"<div><div>This theoretical study investigates the linear and nonlinear optical properties of zigzag carbon nanotubes (CNTs) and silicene nanotubes (SiNTs) with varying radii, focusing on their behavior in the infrared and ultraviolet energy ranges. In the infrared region, absorption spectra exhibit several peaks resulting from allowed transitions between valence and conduction bands. The number of absorption peaks increases with radius for both nanotube types, with SiNTs showing peaks at lower energy ranges and higher intensities compared to CNTs. Conversely, CNTs display markedly higher absorption intensities in the ultraviolet region. The quadratic electronic optic (DC Kerr) effect reveals sharp peaks near the band gap with multiple sign changes, attributed to allowed optical transitions at band edges. The third-order optical susceptibility for both CNT and SiNT structures show several peaks below the band gap energy due to multiphoton resonance absorption. In the infrared region, two highest and lowest subbands near to the Fermi level play a dominant role in the <span><math><mrow><msubsup><mi>χ</mi><mrow><mi>T</mi><mi>H</mi><mi>G</mi></mrow><mrow><mo>(</mo><mn>3</mn><mo>)</mo></mrow></msubsup><mrow><mo>(</mo><mrow><mn>3</mn><mi>ω</mi></mrow><mo>)</mo></mrow></mrow></math></span> peaks formation. The position and intensity of <span><math><mrow><msubsup><mi>χ</mi><mrow><mi>T</mi><mi>H</mi><mi>G</mi></mrow><mrow><mo>(</mo><mn>3</mn><mo>)</mo></mrow></msubsup><mrow><mo>(</mo><mrow><mn>3</mn><mi>ω</mi></mrow><mo>)</mo></mrow></mrow></math></span> peaks demonstrate a strong dependence on nanotube radius and type with higher intensity for the SiNTs. The tunable nature of the optical properties of CNTs and SiNTs by their radius and the enhanced nonlinear optical response of SiNTs, characterized by lower energy peaks and higher intensities, show their significant potential for advanced applications in nonlinear optics, optical detection, and high-energy optical systems.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"277 ","pages":"Article 120923"},"PeriodicalIF":3.3,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142423553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Green florescent carbon dots synthesized from various household green wastes for detection of parathion methyl pesticide","authors":"Manisha Medhi ,&nbsp;Monica Yumnam ,&nbsp;Pronab Mudoi ,&nbsp;Poonam Mishra","doi":"10.1016/j.jlumin.2024.120926","DOIUrl":"10.1016/j.jlumin.2024.120926","url":null,"abstract":"<div><div>The purpose of the current study was to examine the use of green household wastes, such as lemon peel, bottle gourd peel (BG), culinary banana peel, and sugarcane bagasse, as a source for synthesizing carbon dots (C-dots) and to determine how the composition of the material affected the functional characteristics of the C-dots and its interaction behaviour for detection of pesticide. The synthesized C-dots showed green fluorescence with varying particle sizes and red shifting fluorescence with more than 100 nm Stokes shift, indicating time and excitation dependent luminescence behaviour. C-dots produced from bottle gourd (BG) peel had a positive impact on the functional characteristics with a maximum emission of 514 nm and excitation of 410 nm. The SAED and TEM pattern confirmed its amorphous structure. The hydronium ion diameter and the quantum yield were 0.99 nm and 3.1 % respectively. Contributing towards food safety, the synthesized C-dots from BG showed significant behaviour in the detection of parathion methyl (MP) like organophosphorus pesticide (OP) as it conjugated with iron and 1 ppm of parathion methyl, which exhibited “Turn-Off-On” fluorescence behaviour with noticeable changed in intensity and act as a promising qualitative tool for detection of parathion methyl in real sample. The intensity of FL and concentration of OP is directly proportional which is established by the investigated OP in vegetable, fruit and water samples. The significance of iron and MP-OP was also investigated in the presence of other metal ions and pesticides and showed that the C-dots synthesized probe solution was reliable and sensitive towards the detection of MP-OP in real samples.</div></div>","PeriodicalId":16159,"journal":{"name":"Journal of Luminescence","volume":"277 ","pages":"Article 120926"},"PeriodicalIF":3.3,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142423551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}