Optical Materials最新文献_第7页

Dendritic copper nanostructures for ultrasensitive detection of rhodamine 6G and Congo red 用于罗丹明 6G 和刚果红超灵敏检测的树枝状纳米铜结构

IF 3.8 3区材料科学

Optical Materials Pub Date : 2024-10-19 DOI: 10.1016/j.optmat.2024.116301

Dapeng Xu, Zhanpeng Wang, Song Zhang, Wei Yang, Lin Zhou, Jiajia Li, Qiaoqin Guo, Wei Gao, Jian Chen

{"title":"Dendritic copper nanostructures for ultrasensitive detection of rhodamine 6G and Congo red","authors":"Dapeng Xu, Zhanpeng Wang, Song Zhang, Wei Yang, Lin Zhou, Jiajia Li, Qiaoqin Guo, Wei Gao, Jian Chen","doi":"10.1016/j.optmat.2024.116301","DOIUrl":"10.1016/j.optmat.2024.116301","url":null,"abstract":"<div><div>Surface-Enhanced Raman Scattering (SERS) is a fast-responding and non-destructive ultra-sensitive detection technique that can replace traditional chromatographic and spectroscopic analysis techniques. In this experiment, dendritic copper nanostructures were prepared by the solid-state ionics method and the vacuum hot evaporation process with an applied current of I = 9 μA. Using them as a SERS substrate, Raman detection was performed on the dye molecules Rhodamine 6G (R6G) and Congo Red (CR) to determine SERS enhancement performance. It is found that the growth of the prepared copper nanostructures has a top-end dominant phenomenon. The fractal dimension of the copper nanostructure was calculated using fractal theory, and it was revealed to be 1.560. Scanning electron microscopy (SEM) results showed that a large number of 60–80 nm regularly arranged copper nanoparticles were attached to the surface of the dendritic copper nanostructure. This is beneficial to increase the surface roughness of the substrate and improve the detection level of dye molecules. Subsequently, copper nanostructures can sensitively detect R6G and CR solutions as low as 1 × 10<sup>−13</sup> mol/L and 1 × 10<sup>−7</sup> mol/L, reaching single-molecule levels. The Raman mapping experiment showed that the mean relative standard deviation (RSD) values of R6G and CR were 12.3 % and 12.9 %, indicating high uniformity and reproducibility of the structure. This structure effectively achieves the fusion of uniformity, repeatability, and sensitivity, and shows broad application prospects in food detection.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"157 ","pages":"Article 116301"},"PeriodicalIF":3.8,"publicationDate":"2024-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142533434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantifying relaxation time constants in MoS2xSe2(1-x) alloys: Impact of Stoichiometry and Si/SiO2 interference 量化 MoS2xSe2（1-x）合金中的弛豫时间常数：化学计量和 Si/SiO2 干涉的影响

IF 3.8 3区材料科学

Optical Materials Pub Date : 2024-10-18 DOI: 10.1016/j.optmat.2024.116292

Nikita Pimenov, Ekaterina Lebedeva, Sergey Lavrov, Andrey Kudryavtsev, Fyodor Zhukov, Elena Mishina

{"title":"Quantifying relaxation time constants in MoS2xSe2(1-x) alloys: Impact of Stoichiometry and Si/SiO2 interference","authors":"Nikita Pimenov, Ekaterina Lebedeva, Sergey Lavrov, Andrey Kudryavtsev, Fyodor Zhukov, Elena Mishina","doi":"10.1016/j.optmat.2024.116292","DOIUrl":"10.1016/j.optmat.2024.116292","url":null,"abstract":"<div><div>Despite a decade of extensive research on two-dimensional transition metal dichalcogenides, there are still some gaps in our understanding of their remarkable properties, limiting their potential applications. One such gap relates to the properties of these alloys, which offer tunable band gaps and can serve as the basis for various optoelectronic and nonlinear optical devices. A comprehensive understanding of the ultrafast charge carrier excitation and relaxation dynamics as well as their characteristic relaxation time constants, is crucial for the further use of these materials in specific applications. In this work, we experimentally investigate the dynamics of ultrafast relaxation processes in monolayer MoS<sub>2x</sub>Se<sub>2(1-x)</sub> alloys on a Si/SiO<sub>2</sub> substrate using time-resolved spectroscopy. We determine the characteristic relaxation time constants for structures with different stoichiometric compositions and refine these constants by accounting for interference effects arising from the substrate.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"157 ","pages":"Article 116292"},"PeriodicalIF":3.8,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142533436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Construction of Type-II Zn–SnO2/BiOBr heterojunctions with Dual-oxygen vacancies for enhanced photocatalytic degradation 构建具有双氧空位的 II 型 Zn-SnO2/BiOBr 异质结以增强光催化降解能力

IF 3.8 3区材料科学

Optical Materials Pub Date : 2024-10-18 DOI: 10.1016/j.optmat.2024.116295

Xiao-shan Miao , Jia-wei Sun , Fu Ma , Hong-jian Zhao , Yan Zhou , Zheng-bing Han , Xu Li

{"title":"Construction of Type-II Zn–SnO2/BiOBr heterojunctions with Dual-oxygen vacancies for enhanced photocatalytic degradation","authors":"Xiao-shan Miao , Jia-wei Sun , Fu Ma , Hong-jian Zhao , Yan Zhou , Zheng-bing Han , Xu Li","doi":"10.1016/j.optmat.2024.116295","DOIUrl":"10.1016/j.optmat.2024.116295","url":null,"abstract":"<div><div>Zn–SnO<sub>2</sub>/BiOBr, a novel heterojunction material for photocatalytic dye degradation, was synthesized successfully using the one-step hydrothermal method. The formation of the heterojunction enhanced the vacancy coupling effect. The photocatalytic experiment results showed that the degradation rate of Rhodamine B (RhB) due to 0.3Zn–SnO<sub>2</sub>/BiOBr (the heterojunction formed when the molar ratio of Zn–SnO<sub>2</sub> to BiOBr was 0.3) within 15 min was 9.27 and 476.9 times that of BiOBr and Zn–SnO<sub>2</sub>, respectively. Additionally, the degradation rate of basic fuchsin (BF) due to 0.3Zn–SnO<sub>2</sub>/BiOBr was 4.2 and 21.9 times that of BiOBr and Zn–SnO<sub>2</sub>, respectively. The significantly improved photocatalytic performance was because many oxygen vacancies in Zn–SnO<sub>2</sub>/BiOBr collaborated with the type-II heterojunction to promote a narrow bandgap value efficiently, increasing the photogenerated electrons (e<sup>–</sup>) and hole (h<sup>+</sup>), an increased charge separation efficiency under visible light, and favored the photocatalytic degradation of dyes.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"157 ","pages":"Article 116295"},"PeriodicalIF":3.8,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142533423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optical and microstructural studies of femtosecond laser treated amorphous germanium thin coatings 飞秒激光处理非晶锗薄膜的光学和微观结构研究

IF 3.8 3区材料科学

Optical Materials Pub Date : 2024-10-18 DOI: 10.1016/j.optmat.2024.116290

L. Kotsedi , A. Abdelmalek , V. Bharadwaj , C.B. Mtshali , Z.Y. Nuru , B. Sotillo , G. Coccia , S.M. Eaton , R. Ramponi , E.H. Amara , M. Maaza

{"title":"Optical and microstructural studies of femtosecond laser treated amorphous germanium thin coatings","authors":"L. Kotsedi , A. Abdelmalek , V. Bharadwaj , C.B. Mtshali , Z.Y. Nuru , B. Sotillo , G. Coccia , S.M. Eaton , R. Ramponi , E.H. Amara , M. Maaza","doi":"10.1016/j.optmat.2024.116290","DOIUrl":"10.1016/j.optmat.2024.116290","url":null,"abstract":"<div><div>The study of the relaxation mechanism of amorphous germanium after femtosecond laser irradiation is presented in this work. In particular, a thin germanium coating was deposited onto a glass substrate through the electron beam vacuum coating method. The substrate was kept at room temperature during the coating process, which resulted in a deposited layer characterized by an amorphous microstructure, as observed from the X-ray diffraction. The germanium layer was then irradiated with a femtosecond laser at 1030 nm wavelength, while varying the net fluence from 15 J cm<sup>−2</sup> to 90 J cm<sup>−2</sup>. Moreover, an extended two temperature model was used to extract the electronic and lattice temperature of the laser heated germanium coating, showing a 32 % contribution from heating due to the thermal accumulation effect. The microstructural and morphological studies of the irradiated samples were carried out using θ-2θ X-ray diffraction and high-resolution scanning electron microscopy. From the X-ray diffraction results, it was observed that at higher laser fluence there is an emergence of crystallinity on the germanium layer, with no evidence of oxidation. On the surface, the morphology was observed to evolve to granular sphere, attributed to melting of the material. Finally, an increase in absorbance with laser fluence was observed and the optical band gap of the coating was calculated.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"157 ","pages":"Article 116290"},"PeriodicalIF":3.8,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142533517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of ZnO nanoparticles-based fluorescent ink for information encryption and security applications 合成基于氧化锌纳米颗粒的荧光墨水，用于信息加密和安全应用

IF 3.8 3区材料科学

Optical Materials Pub Date : 2024-10-18 DOI: 10.1016/j.optmat.2024.116296

Thanh Phuong Nguyen , Huu Phuc Dang , Long Giang Nguyen , Cong Danh Le

引用次数: 0

Intensity-dependent SA-RSA switching in nickel-chromium transition metal oxide nanoparticles 镍铬过渡金属氧化物纳米粒子中的强度依赖性 SA-RSA 开关

IF 3.8 3区材料科学

Optical Materials Pub Date : 2024-10-18 DOI: 10.1016/j.optmat.2024.116298

Sijo S. Thomas , I Hubert Joe

引用次数: 0

Optimization of deposition time on structural, morphological, and optical properties of Cd1-xZnxS nanocrystalline thin films 优化沉积时间对 Cd1-xZnxS 纳米晶薄膜结构、形态和光学特性的影响

IF 3.8 3区材料科学

Optical Materials Pub Date : 2024-10-18 DOI: 10.1016/j.optmat.2024.116285

Pranamika Borah, Alok Kumar Das, Prasanta Kumar Saikia

{"title":"Optimization of deposition time on structural, morphological, and optical properties of Cd1-xZnxS nanocrystalline thin films","authors":"Pranamika Borah, Alok Kumar Das, Prasanta Kumar Saikia","doi":"10.1016/j.optmat.2024.116285","DOIUrl":"10.1016/j.optmat.2024.116285","url":null,"abstract":"<div><div>In this work, Cd<sub>1-x</sub>Zn<sub>x</sub>S nanocrystalline thin films have been synthesized over a glass substrate by a simple and cost-effective Chemical Bath Deposition (CBD) technique at various deposition time keeping other deposition parameters constant. The structural, morphological, and optical properties are studied by incorporating a range of characterization techniques, including X-ray diffraction (XRD), Field Emission Scanning Electron Microscopes (FESEM), Energy Dispersive X-rays (EDX), and UV–Visible spectrophotometers (UV–Vis). The films have been deposited at five different deposition time in the range from 30 mins to 150 mins to record the changes which address in depth the structural, morphological and optical properties. Empirical fitting equations have also been developed to obtain a more quantitative analysis of the effect of deposition time. The results obtained in this work are compared with some recent reported works for performance analysis of the buffer layer. The proposed buffer layer deposited at 30 mins not only attains all the desirable qualities required for maximum extraction of solar energy but also a low-cost and environment friendly option, making it a potential candidate for solar cell and optoelectronic applications.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"157 ","pages":"Article 116285"},"PeriodicalIF":3.8,"publicationDate":"2024-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142533437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Infiltration of glass nanofiber-reinforced polylactic acid into delignified hardwood toward photoluminescent and mechanically reliable smart windows 将玻璃纳米纤维增强聚乳酸渗入木质素硬木，实现光致发光和机械可靠的智能窗户

IF 3.8 3区材料科学

Optical Materials Pub Date : 2024-10-17 DOI: 10.1016/j.optmat.2024.116287

Salhah D. Al-Qahtani , Khulood A. Abu Al-Ola , Ghadah M. Al-Senani

{"title":"Infiltration of glass nanofiber-reinforced polylactic acid into delignified hardwood toward photoluminescent and mechanically reliable smart windows","authors":"Salhah D. Al-Qahtani , Khulood A. Abu Al-Ola , Ghadah M. Al-Senani","doi":"10.1016/j.optmat.2024.116287","DOIUrl":"10.1016/j.optmat.2024.116287","url":null,"abstract":"<div><div>Ultraviolet-protective, mechanically reliable, and photoresponsive wood that can switch color under ultraviolet light was developed. A combination of alkaline earth-doped strontium aluminate (ASA) as a photoluminescent pigment and glass nanofiber-supported polylactic acid as a hosting agent was infused into a delignified wood, producing transparent wood with photochromic activity. The ASA phosphor has proven high thermal stability and photostability. A typical process for producing colorless photoluminescent wood includes the well-dispersion of <span>ASA</span> in glass nanofiber-supported polylactic acid without agglomeration. As proven by the coloration measurements, the current photoluminescent wood becomes green under ultraviolet light and remains transparent under daylight. Transmission electron microscopy (TEM) and scanning electron microscope (SEM) were employed to determine the morphology of the phosphor particles and glass fibers, demonstrating sizes of 12–21 nm and 50–125 nm, respectively. The luminescent wooden samples were studied by numerous microscopic and spectroscopic techniques, including SEM, X-ray fluorescence (XRF), and energy-dispersive X-ray (EDX). Upon excitation at 365 nm, the luminescence wood demonstrated an emission peak at 518 nm. When increasing the ASA concentration, the photoluminescent hardwoods displayed improved ultraviolet protection and better water resistance. The responsiveness of the luminescent wood to UV irradiation was fast and reversible.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"157 ","pages":"Article 116287"},"PeriodicalIF":3.8,"publicationDate":"2024-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142533518","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The effect of annealing temperature on the properties of CdSe thin films prepared by annealing the SES deposited precursors 退火温度对通过退火 SES 沉积前驱体制备的硒化镉薄膜性能的影响

IF 3.8 3区材料科学

Optical Materials Pub Date : 2024-10-16 DOI: 10.1016/j.optmat.2024.116284

Pengjie Wang , Rengang Zhang , Tuantuan Wang , Xuemei Li , Rui Cui , Hongyu Liu , Peng Zhang , Xingzhong Cao , Runsheng Yu , Baoyi Wang

{"title":"The effect of annealing temperature on the properties of CdSe thin films prepared by annealing the SES deposited precursors","authors":"Pengjie Wang , Rengang Zhang , Tuantuan Wang , Xuemei Li , Rui Cui , Hongyu Liu , Peng Zhang , Xingzhong Cao , Runsheng Yu , Baoyi Wang","doi":"10.1016/j.optmat.2024.116284","DOIUrl":"10.1016/j.optmat.2024.116284","url":null,"abstract":"<div><div>Cadmium selenide (CdSe) thin films were grown on quartz glass substrates by thermal annealing of thin-film precursors deposited by successive sputtering, evaporation and sputtering (SES) method. The crystal structure, surface morphology, composition, optical and electrical properties of CdSe films were investigated. XRD analysis revealed that the SES deposited precursors after annealing, were converted into hexagonal CdSe films with a preferential orientation. FE-SEM results showed that the CdSe films obtained at 400 °C and 500 °C were dense, uniform and had greater grains than that obtained at 300 °C, while pores and peeling of CdSe film appeared at 600 °C. EDS results showed that all CdSe films were Cd-rich, and the composition of the CdSe film prepared at 500 °C was closest to the ideal stoichiometric ratio. The formation of CdSe films included atomic diffusions, the selenization reaction and CdSe grain growth, accompanied by volatilization of Cd and Se. The CdSe films exhibited good transmittance of about 60–85 % and band gaps of 1.57–1.67 eV. The PL spectra showed that the CdSe films prepared at different temperatures had a strong emission peak at 782 nm and a weak emission peak at 829 nm, which were possibly caused by the band-to-band transitions and defect emissions. In addition, electrical measurements showed that the CdSe films were n-type conductivity, the resistivity was in the range of 9.65 × 10<sup>2</sup>-7.55 × 10<sup>3</sup> Ω cm, and the carrier concentration was in the range of 5.72 × 10<sup>14</sup>-2.99 × 10<sup>15</sup> cm<sup>−3</sup>.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"157 ","pages":"Article 116284"},"PeriodicalIF":3.8,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142533516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Solid-solution Er:(Sc,Y)2O3 transparent ceramics: Optical spectroscopy, inhomogeneous line broadening, C3i sites and mid-infrared laser operation 固溶Er:(Sc,Y)2O3透明陶瓷：光学光谱、不均匀线宽、C3i 位点和中红外激光操作

IF 3.8 3区材料科学

Optical Materials Pub Date : 2024-10-16 DOI: 10.1016/j.optmat.2024.116288

Simone Normani , Pavel Loiko , Roman Maksimov , Liza Basyrova , Vladislav Shitov , Elena Dunina , Alexey Kornienko , Liudmila Fomicheva , Alain Braud , Ammar Hideur , Bruno Viana , Patrice Camy

{"title":"Solid-solution Er:(Sc,Y)2O3 transparent ceramics: Optical spectroscopy, inhomogeneous line broadening, C3i sites and mid-infrared laser operation","authors":"Simone Normani , Pavel Loiko , Roman Maksimov , Liza Basyrova , Vladislav Shitov , Elena Dunina , Alexey Kornienko , Liudmila Fomicheva , Alain Braud , Ammar Hideur , Bruno Viana , Patrice Camy","doi":"10.1016/j.optmat.2024.116288","DOIUrl":"10.1016/j.optmat.2024.116288","url":null,"abstract":"<div><div>Rare-earth-doped transparent sesquioxide laser ceramics enable engineering of their gain bandwidths via solid-solution compositions exhibiting a strong inhomogeneous spectral line broadening. We report on a detailed spectroscopic study and the first mid-infrared laser operation of Erbium-doped yttria-scandia, (Sc<sub><em>x</em></sub>Y<sub>1−<em>x</em></sub>)<sub>2</sub>O<sub>3</sub>, ceramics fabricated by vacuum sintering at 1750 °C from laser-ablated nanoparticles. The effect of the Sc fraction on the spectral and kinetic properties of Er<sup>3+</sup> emission around 2.8 μm owing to the <sup>4</sup>I<sub>11/2</sub> → <sup>4</sup>I<sub>13/2</sub> is revealed. The inhomogeneous spectral line broadening leading to merging of individual Stark sub-levels of Er<sup>3+</sup> multiplets is evidenced by low-temperature spectroscopy. An original method of quantifying the distribution of dopant Er<sup>3+</sup> ions over <em>C</em><sub><em>2</em></sub> and <em>C</em><sub><em>3i</em></sub> symmetry sites in the cubic bixbyite structure is suggested based on the transition probabilities derived by the Judd-Ofelt theory. In the parent Er:Y<sub>2</sub>O<sub>3</sub> ceramic, the Er<sup>3+</sup> ions nearly follow the ideal distribution with 3/4 of ions residing in <em>C</em><sub><em>2</em></sub> sites, and Sc addition skews it in favor of <em>C</em><sub><em>3i</em></sub> sites. A continuous-wave Er:(Sc,Y)<sub>2</sub>O<sub>3</sub> ceramic laser generated 312 mW at 2716 nm with a slope efficiency of 18.6 % and a laser threshold of 128 mW.</div></div>","PeriodicalId":19564,"journal":{"name":"Optical Materials","volume":"157 ","pages":"Article 116288"},"PeriodicalIF":3.8,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142533435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0