JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Shuang Shu,Yu Wang,Yuee Ke,Bin Deng,Rixin Liu,Qinyang Song,Jianxu Wang,Ruijin Yu
Novel orange-red-emitting tantalate NaCaTiTaO 6 (NCTT): x Sm 3+ ( x = 0.005–0.25) phosphors are synthesized via a solid-state reaction technique at 1300 °C. The phosphors exhibit an orthorhombic perovskite structure with a space group of Pnma (No. 62). At 407 nm excitation, the phosphors show the strongest emission peak at 647 nm belonging to the 4 G 5/2 → 6 H 9/2 transition. The optimal Sm 3+ concentration is 0.05 mol, and concentration quenching is caused by dipole–dipole interaction. The NCTT:0.05Sm 3+ phosphor exhibit a broad bandgap of 3.44 eV and a high color purity of 99.9%. At 420 K, the decrease in intensity is only 10% of the initial value at 300 K for NCTT:0.05Sm 3+ phosphor but 15% for Y 3 Al 5 O 12 :Ce 3+ phosphor. Consequently, the fabricated white light-emitting diodes exhibit a high rendering index value of 89, a good correlated color temperature of 5257 K, and CIE coordinates of (0.339, 0.364). Hence, the Sm 3+ -doped orange-red-emitting NCTT phosphors have potential applications for w-LEDs.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2022
·Vol. 10
·期 8
·2102201
·
IF 10.05
Jiexin Li,Zongtao Li,Jiayong Qiu,Jiasheng Li
Quantum dots (QDs) exhibit remarkable photoelectric performance. However, the conversion efficiency and thermal performance of QD converters so far is not satisfactory for high-power solid-state light (SSL) applications owing to the serious reabsorption loss of QDs and the poor thermal diffusion of polymer materials. Here, an efficient QD converter based on an anodic aluminum membrane (AAM), with high light enhancement and thermal diffusion, is introduced for high-power SSL applications. Nanoporous AAMs are utilized as templates for confining the QD deposition into the nanowire (NW) shape by incorporating inkjet printing and vacuum-deposition methods, forming vertical QD NW arrays. Compared with conventional converters, QD-AAM yields nearly twofold photoluminescence intensity. Three-dimensional finite-difference (FDTD) simulations attribute the fluorescence-enhancement mechanism to the enhancement of QD conversions and boosting of the waveguide effect in QD-AAM. Furthermore, QD-AAM exhibits excellent thermal diffusion performance under high-power excitation, owing to the inner heat conduction path in the AAM framework. This study provides a practical and efficient strategy to comprehensively enhance the optical and thermal performance of QD converters for high-power SSL applications.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
ACS Applied Bio Materials
·
2019
·
IF 0
Hui Zhang,Yiming Wang,Hua Zhong,Jie Li,Caifeng Ding
Gold-based nanomaterials are widely used in the field of photothermal therapy (PTT) of cancer cells because of the low cytotoxicity and excellent photothermal conversion efficiency upon near-infrared (NIR) light irradiation. Hollow gold nanoparticles exhibited enhanced interaction with light and surrounding media due to larger exposed surface than solid nanoparticles and can be used to develop sensitive NIR sensors in biomedicine. Here we designed an NIR light-controlled biosensing strategy that employs dual Pt@Au nanoring@DNA (PAD) probes for fluorescence imaging and targeted PTT of cancer cells. The probes had Au nanoring with Pt framework (Pt@AuNR) as a photosensitizer and functionalized double-stranded DNA (dsDNA) hybrids as a sensor. The cell-subtype-specific recognition and fluorescence imaging were controlled by NIR light irradiation through the dehybridization of dsDNA as a result of temperature elevation localized on the PAD probe. The targeted PTT of cancer cells was excellent under the control of NIR light due to the strong absorption of Pt@AuNRs in the NIR region. The majority of target tumor cells were killed under the photothermal effect after incubating with the dual PAD probes and receiving artificial laser irradiation. The dual PAD probe system successfully described NIR light-activated cancer cell diagnosis and therapy, including the activation of specific recognition, fluorescence imaging, and targeted PTT. This work has provided a promising platform on which NIR light-controlled targeted theranostic may be developed.
研究领域:
生物医学工程
·
肿瘤学
·
纳米医学
✓ 已验证
DOI
CHEMISTRY OF MATERIALS
·
2022
·
IF 10.508
Jiance Jin,Yinghui Peng,Yuting Xu,Kai Han,Anran Zhang,Xiao-Bao Yang,Zhiguo Xia
Sb3+ with stereochemically active lone pair 5s2 electrons is overwhelming in the doping engineering of the luminescent metal halides, and it usually leads to extrinsic self-trapped excitons (STEs) with tunable emissions. However, the photoluminescence enhancement mechanism of Sb3+ doped metal halides compared to the pristine host remains unclear. Herein, we doped Sb3+ into all-inorganic non-emissive Rb4CdCl6, realizing bright green emission peaking at 525 nm with a photoluminescence quantum yield of 70.2%. A comparison of Raman spectra, as well as the Debye temperature, was utilized to elucidate the STEs mechanism, verifying that the doping of Sb3+ softens the structural lattice. Thus, strong electron–phonon interactions enable highly efficient photoluminescence originating from STEs emission in Rb4CdCl6:Sb3+. This work demonstrates solid evidence that the efficient emissions of metal halides can be triggered by Sb3+ doping, and the design principle involved will guide the future studies for emerging luminescence material exploration.
研究领域:
材料科学
·
光学
·
固体物理
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Bowen Chen,Chenxia Li,Degang Deng,Fengping Ruan,Ming Wu,Le Wang,Yanting Zhu,Shiqing Xu
In this study, Eu 2+ /Eu 3+ coexisting perovskite LaAlO 3 phosphors were synthesized by a traditional high-temperature solid-phase reaction method and investigated via X-ray diffraction data, X-ray photoelectron spectroscopy and temperature-dependent photoluminescence spectra. The Eu 2+ /Eu 3+ coexisting LaAlO 3 phosphors exhibit excellent optical temperature sensing characteristics and are potential inorganic materials for temperature detection. The measured maximal absolute temperature sensitivity reaches 0.014 K -1 , and the corresponding largest relative temperature sensitivity is 1.193% K −1 , which are superior to most of previous reports of that. Meanwhile, the monitored signal peaks are well separated, providing a good signal discriminability. The energy level crossover relaxation of Eu 2+ and Struck-Fonger crossover process involving O 2– -Eu 3+ charge transfer band were used to explain the different temperature-dependent responses of Eu 2+ and Eu 3+ . This work may give new ideas for the future research of optical thermometric materials with high sensitivity and high discriminability.
研究领域:
材料科学
·
无机化学
·
光学工程
·
传感器技术
·
固体物理
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Ning Li,Xueyun Gao,Haikuan Fan,Yangqin Gao,Lei Ge
Effective and suitable utilization of solar energy was achieved using a full-spectrum-response photocatalyst AgBr/Cs x WO 3 , applied in the photocatalytic and photochromic field. Benefitting from near-infrared (NIR) absorption ability of Cs x WO 3 , AgBr/Cs x WO 3 exhibits enhanced visible-near-infrared (Vis-NIR) driven photocatalytic activity. Based on X-ray photoelectron spectroscopy (XPS), photoluminescence spectra (PL), and the photoelectrochemical analysis, AgBr and Cs x WO 3 formed a Z-scheme system at the interface to efficiently separate and transfer photo-induced electrons at a fast rate. The quenching experiment and the electron spin resonance (ESR) tests indicated that the photocatalytic reaction is activated by the production of superoxide radicals. Furthermore, the photochromic analysis to different light exhibits the AgBr/Cs x WO 3 heterostructure is stable under visible light with negligible photodeposition of AgBr, and has excellent double photochromic activity with visible-shielding effect of AgBr to Ag 0 and infrared-blocking effect of Cs x WO 3 under ultraviolet light. This research provides new insights into the manufacture of energy-efficient and environmentally friendly materials that provide excellent performance in both thermal insulation and decontamination.
研究领域:
材料科学
·
物理化学
·
纳米催化
·
光化学
·
功能材料
·
环境净化
·
能源材料
✓ 已验证
DOI
高影响因子
Journal of Materiomics
·
2024
·
IF 8.4
Weibin Chen,Yuzhen Wang,Gaochao Liu,Yongsheng Sun,Zhiguo Xia
Laser phosphor display technology plays an important role in advanced display projection; however, it is a challenge in maintaining excellent color accuracy under high brightness due to the lack of red spectrum. Here, red-emitting Mg 2 Al 4 Si 5 O 18 :Eu 2+ ceramics as the phosphor wheel have been optimized in chemical compositions and texture orientation. The textured Mg 2 Al 4 Si 5 O 18 :Eu 2+ ceramics have high transparency and spot limiting ability, accordingly, the ceramic wheel outputs 1184 l m of ultra-bright red light under 50W·mm −2 laser power density. Moreover, the red spectral utilization (＞600 nm) of textured Mg 2 Al 4 Si 5 O 18 :Eu 2+ ceramics is 2.17 times that of traditional Y 3 Al 5 O 12 :Ce 3+ phosphor wheel. The red-emitting textured Mg 2 Al 4 Si 5 O 18 :Eu 2+ cordierite ceramic herein enables an improved light-color saturation experience, and it is potential in the next-generation laser phosphor display applications.
研究领域:
材料科学
·
光电技术
·
显示技术
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2023
·Vol. 12
·期 9
·2302063
·
IF 9
Yakun Hu,Jiance Jin,Kai Han,Zhiguo Xia
Doping in luminescent metal halides has become an effective strategy for tailoring the optoelectronic properties. Herein, Cu + is introduced into Rb 2 AgBr 3 to design the synthesis of Rb 2 AgBr 3 : x Cu + , which possess cold-white light emission at room-temperature without changing the spectral profiles; however, the Cu + incorporation significantly enhances the photoluminescence quantum efficiency to 98.8% in Rb 2 AgBr 3 :0.05Cu + . Additionally, a high scintillation light yield of up to 79 250 photons MeV −1 and a low detection limit of 714.83 nGy s −1 have been achieved via this Cu + doping engineering. X-ray imaging with a spatial resolution of up to 5.8 lp mm −1 is further realized using a large scintillator film prepared by mixing polydimethylsiloxane with Cu + doped Rb 2 AgBr 3 scintillators. This study provides a Cu + doping design principle for improving both the photoluminescence and scintillation performances of metal halides.
研究领域:
材料科学
·
光电技术
·
放射学
✓ 已验证
DOI
高影响因子
Science China-Chemistry
·
2024
·
IF 10.4
Li Jiangao,Niu Niu,Wang Deliang,Liu Xue,Qin Yi,Wang Lei,Tang Ben Zhong,Wang Dong
Exploration of single molecular species synchronously featured by long excitation/emission wavelength, accurate diagnosis, and effective therapy, remains supremely appealing to implement high-performance cancer phototheranostics. However, those previously established phototheranostic agents are undiversified and stereotyped in terms of structural skeleton, and generally exhibit insufficient phototheranostic outcomes. Herein, we innovatively utilized indanone-condensed thiadiazolo[3,4-g]quinoxaline (ITQ) as electron acceptor to construct novel photosensitizer with second near-infrared (NIR-II) emission. Experimental study and theoretical calculation demonstrated that comparing with the counterparts constituting by widely employed NIR-II building block benzobisthiadiazole (BBTD) and 6,7-diphenylthiadiazoloquinoxaline (DPTQ), ITQ-based photosensitizer (TITQ) showed superior aggregation-induced emission (AIE) characteristics, much stronger type-I reactive oxygen species (ROS) production, and prominent photothermal conversion capacity. Furthermore, TITQ nanoparticles with excellent biocompatibility were capable of effectively accumulating in the tumor site and visualizing tumor through fluorescence-photoacoustic-photothermal trimodal imaging with highly spatiotemporal resolution, and completely eliminating tumor by type-I photodynamic-photothermal therapy.
研究领域:
癌症研究
·
光疗
·
纳米医学
·
生物医学工程
·
分子成像
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2015
·Vol. 5
·期 1
·1-9
·
IF 5.578
Liu Hui,Gao Nan,Liao Meiyong,Fang Xiaosheng
Ultraviolet (UV) photodetectors are important tools in the fields of optical imaging, environmental monitoring and air and water sterilization, as well as flame sensing and early rocket plume detection. Herein, hexagonal-like Nb 2 O 5 nanoplates are synthesized using a facile solvothermal method. UV photodetectors based on single Nb 2 O 5 nanoplates are constructed and the optoelectronic properties have been probed. The photodetectors show remarkable sensitivity with a high external quantum efficiency (EQE) of 9617% and adequate wavelength selectivity with respect to UV-A light. In addition, the photodetectors exhibit robust stability and strong dependence of photocurrent on light intensity. Also, a low-cost drop-casting method is used to fabricate photodetectors based on Nb 2 O 5 nanoplate film, which exhibit singular thermal stability. Moreover, the hexagonal-like Nb 2 O 5 nanoplates show significantly better photocatalytic performances in decomposing Methylene-blue and Rhdamine B dyes than commercial Nb 2 O 5 .
研究领域:
材料科学
·
光学工程
·
环境科学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2020
·
IF 4.389
Ying Yang,Shuxin Wang,Yinlong Zhou,Xueyan Wang,Xuan Liu,Anjian Xie,Yuhua Shen,Manzhou Zhu
Theranostics including imaging and therapy has become an advanced trend for cancer treatment. It is of great significance to develop new theranostics agent for precision medicine research. In this regard, structurally precise metal nanoclusters (NCs) with ultra-small diameter and potential theranostic functions are no doubt to be a priority. In this study, we firstly investigated the photothermal and photodynamic properties of structurally precise oil-soluble bimetallic NCs (Pt 1 Ag 28 ) and tactfully solubilize them into the hydrophobic inner cavity of biodegradable amphiphilic chitosan derivative (ACD) micelles via hydrophobic interaction. Positively charged Pt 1 Ag 28 @ACD with suitable particle size (∼60 nm) could not only realize effectively passive targeted delivery, but also be easily uptaken by negatively charged cancer cells for increasing targeting effect. Further, the aggregation induced emission fluorescence imaging (AIE FI)-guided enhanced photothermal/photodynamic therapy (PTT/PDT) on tumor is finally nicely achieved by the micelle solubilization of ACD micelles to Pt 1 Ag 28 NCs, which were demonstrated by in vitro and in vivo experimental results. This theranostic platform overcomes the difficulty of lipophilic NCs entering water-phase organisms, provides enlightenment for the universal study of the interaction mechanism between organisms and oil-soluble NCs at the atomic level in future precision medicine research.
研究领域:
生物医学工程
·
纳米医学
·
肿瘤学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2012
·Vol. 41
·期 17
·5334-5342
·
IF 3.838
Yan Zhao,Bing Yan
Three kinds of rare earth hybrid materials with enhanced thermostability and photoluminescence properties have been prepared for the first time by using a functionalized GaN matrix as one of the building blocks. A number of silane coupling agents (isocyanate triethoxysilane (ICTES), 3-chloropropyl triethoxysilane (CPTES) and 3-aminopropyl triethoxysilane (APTES)) behave as the covalent linkages for modification by both hydroxylation of GaN and functionalized photoactive ligands (4-mercaptobenzoic acid (MBA), 4-hydroxybenzoic acid (HBA) and nitrobenzoyl chloride (NBC)), resulting in the precursors (MBA–ICTES–GaN, HBA–CPTES–GaN and NBC–APTES–GaN). Subsequently, multicomponent photofunctional rare earth hybrid materials with the three precursors and 1,10-phenanthroline (Phen) are assembled and characterized by their FTIR spectra, UV–vis diffuse reflectance spectra, XRD patterns, and photoluminescent behaviour (luminescence, lifetime, quantum efficiency, and energy transfer). These results reveal that the Eu3+ hybrids with the MBA–ICTES–GaN unit have a better luminescence intensity ratio, higher quantum efficiency and longer lifetime than those with the HBA–CPTES–GaN and NBC–APTES–GaN units. Meanwhile the hybrid Phen–Tb–HBA–CPTES–GaN possesses a stronger characteristic emission of Tb3+ ions than the other two hybrids (Phen–Tb–MBA–ICTES–GaN and Phen–Tb–NBC–APTES–GaN). Moreover, two-color-based hybrid materials are fabricated by combining different molar ratios of Eu3+ and Tb3+ in the same system (Phen–RE–MBA–ICTES–GaN) with emission at a wavelength of 331 nm (RE = Eu, Tb) and yellow luminescence can be achieved.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）