PARTICLE & PARTICLE SYSTEMS CHARACTERIZATION
·
2023
·Vol. 40
·期 8
·2300032
·
IF 2.7
Hao Jiang,Chenxi Zang,Yixiu Dong,Min Lai,Shuhong Xu,Jingkun Xu
CsPbX 3 (X = Cl, Br, I) nanocrystals (NCs) are competitive materials for a wide range of applications because of their outstanding optoelectronic properties. Ion doping has been demonstrated as one powerful method for improving the optical properties of CsPbX 3 NCs. However, the conventional ion-doping approaches are tedious, and generally performed under an inert atmosphere and high temperature. In this work, a one-step ultrasonic-assisted approach is demonstrated to prepare doped CsPbX 3 NCs. To demonstrate the universality of the ultrasonic-assisted ion-doping approach, three ion-doped perovskite NCs are prepared, which represent three common improvements effects of ion doping on perovskite NCs, namely improved stability, PL emission, and photoluminescence quantum yields (PLQYs) of perovskite NCs. Sr-doped CsPbI 3 NCs showed improved phase stability. Mn-doped CsPbCl 3 NCs showed dual-color emissions at 406 and 580 nm. The PLQYs of the as-prepared Ni-doped CsPbCl 3 NCs are greatly improved, from 10.1% to 71%. Such a simple and versatile ion-doping approach may promote the practical applications of all-inorganic perovskite NCs.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
无机化学
·
半导体材料
✓ 已验证
DOI
高影响因子
Small
·
2019
·Vol. 15
·期 7
·1804974
·
IF 10.856
Na Li,Pingping Wei,Linan Yu,Junyi Ji,Jiupeng Zhao,Chuanbo Gao,Yao Li,Yadong Yin
The dynamic optical switch of plasmonic nanostructures is highly desirable due to its promising applications in many smart optical devices. To address the challenges in the reversibility and transmittance contrast of the plasmonic electrochromic devices, here, a strategy is reported to fabricate color switchable electrochromic films through electro-responsive dissolution and deposition of Ag on predefined hollow shells of Au/Ag alloy. Using the hollow Au/Ag alloy nanostructures as stable seeds for site-specific deposition of Ag, elimination of the random self-nucleation events is enabled and optimal reversibility in color switching is allowed. The hollow structure further enables excellent transmittance contrast between the bleached and colored states. With its additional advantages such as the convenience for preparation, high sensitivity, and field-tunable optical property, it is believed that this new electrochromic film represents a unique platform for designing novel smart optical devices.
研究领域:
材料科学
·
纳米科技
·
光学工程
·
功能材料
·
电化学
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2021
·Vol. 10
·期 3
·2101843
·
IF 9.926
Ziyu Chen,Jiaxin Yang,Rui Xu,Zejia Zhao,Xu Sang,Lisa Liu,Ming Feng,Feng Song,Yonghong He,Wei Huang
Optical encryption provides a significant implementation strategy for information security, which can be ascribed to multichannel, simple operation, and high security. Multiple responsive luminescent material has emerged as an ideal candidate for optical encryption, owing to intelligent responsive ability and unclonable security. Herein, a structural doping strategy is developed in the layer-by-layer self-assembly process to elevate the maneuverability of light-emitting color and mode. By encapsulating lanthanide doped inorganic matrix and layered hydroxide with PMA, the recognizable red-orange fluorescence can be produced in the invisible region, and realizes the conversion of yellow and green fluorescence in visible region. Meanwhile, both excitation source and emission color can be used as distinguishable encryption means, which enables structural doping complex to be multiplexed and encoded with high capacity and complexity. Furthermore, asymmetrically and symmetrically coded flexible labels with specific color sequence are prepared by brushing process, and specific encryption key are set to ensure the nonlinearity of cryptosystem. Through the integration of dual-mode and adjustable light response codes constructed by structural doping strategy, multidimensional high-level information encryption can be realized, which opens up a deep exploration in the field of information security for the application of multifunctional optical properties of light response materials.
研究领域:
材料科学
·
纳米科技
·
光学工程
·
信息安全
·
功能材料
·
光子学
·
智能材料
✓ 已验证
DOI
高影响因子
POLYHEDRON
·
2016
·
IF 2.108
Tongguang Sun,Fei Liang,Xinyuan Zhang,Heng Tu,Zheshuai Lin,Guochun Zhang,Yicheng Wu
Single crystals of three new organic–inorganic hybrid compounds, tri[1-(diaminomethylene)uronium] hexachlorobismuthate ((C 2 H 7 N 4 S) 3 BiCl 6 ·H 2 O, HATU-BCH), bis[1-(diaminomethylene)uronium] pentabromobismuthate, ((C 2 H 7 N 4 S) 2 BiBr 5 , HATU-BB), and bis [3,5-diamino-1,2,4-thiadiazol-2-ium] pentaiodobismuthate ((C 2 H 5 N 4 S) 2 BiI 5 , OHATU-BI), have been successfully grown by slow evaporation method. Their structures were determined by single - crystal X-ray diffraction, in which all anion sublattice structures consist of hexahalobismuthates octahedra with different connection modes involving isolated, shared-corner, and shared-edge. The spectra characters were studied by Infrared and Raman spectra, which interpreted by calculation of the density functional theory (DFT) method and diffuse reflectance spectra. Thermal properties were characterized by thermal gravimetric analysis and differential scanning calorimetry.
研究领域:
材料化学
·
晶体工程
·
配位化学
·
光谱学
·
热分析
·
计算化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·Vol. 49
·期 5
·7913-7919
·
IF 5.532
Rui Li,Panlai Li,Guohui Wei,Jiehong Li,Yawei Shi,Ye Wang,Shaoxuan He,Yuanbo Yang,Wenge Ding,Zhijun Wang
Developing novel optical thermometry with ultrahigh relative sensitivity and temperature resolution has become a cutting-edge topic. For this purpose, under obeying Boltzmann distribution , a series of Li 2 Zn 0.9992-x A x Ge 3-y B y O 8 :0.08% Cr 3+ (B= Sc 3+ , In 3+ , A = Si 4+ ) phosphors were studied, which the luminescence intensity ratio between the transition of 4 T 2g → 4 A 2g emission and the R line based on thermally coupled energy levels constitutes a temperature sensing work with a relative sensitivity of 9.46% K −1 , 9.73% K −1 , and 10.38% K −1 , respectively. It is worth mentioning that the luminescence intensity of the R line (peak 1) increases significantly with the increase of temperature, while the transition of 4 T 2g → 4 A 2g (peak 2) with high intensity at low temperature gradually quenching, and this opposite trend is an important advantage for the design of excellent thermometers. Compared the best relative sensitivity of Li 2 Zn 0.9992-x A x Ge 3-y B y O 8 :0.08%Cr 3+ (B= Sc 3+ , In 3+ , A = Si 4+ ) with the crystal field Dq /B, it can be concluded that relative sensitivity increasing gradually with decreasing the intensity of crystal field. Finally, by testing the stability of the sample at 50 K, a thermal resolution of 0.082 K, 0.080 K and 0.077 K was obtained, respectively, which is one of the best thermal resolutions so far, while the repeatability of the sample stability at 50 K and 300 K cycles was higher than 99%. Our work is expected to provide guiding insights for optimizing the sensitivity of Cr 3+ -based luminescence intensity ratio thermometers.
研究领域:
材料科学
·
光学传感
·
固体物理
·
低温物理学
·
功能材料
·
发光材料
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·Vol. 49
·期 5
·8204-8211
·
IF 5.532
Qianchao Ma,Qiyun Liu,Meihua Wu,Yifei Liu,Rui Wang,Ruxian Zhou,Yanheng Xu,Haichao Wei,Ruiyu Mi,Xin Min,Lefu Mei,Zhaohui Huang,Bin Ma
In this study, La 2 (MoO 4 ) 3 doped with Eu 3+ was synthesized by the high-temperature solid-state method. The phase composition of the Eu 3+ -doped La 2 (MoO 4 ) 3 sample was confirmed by X-ray powder diffraction (XRD) analysis, and the microstructure was observed via the scanning electron microscopy (SEM). Under the excitation at 211 nm, the room temperature emission spectra of Eu 3+ in the samples with different doping levels were recorded. In addition, the prepared La 2 (MoO 4 ) 3 : x Eu 3+ ( x = 0–0.25) phosphors were color tunable. A non-contact optical thermometer with high sensitivity and high-temperature resolution was fabricated based on the different thermal quenching behaviors of the Mo–O group and Eu 3+ center. The fluorescence intensity ratio (FIR), temperature resolution (ΔT), maximum absolute and relative sensor sensitivity (Sa and Sr) of La 2 (MoO 4 ) 3 :Eu 3+ were calculated according to different thermal quenching effects between room temperature (298K) and 573K of Eu 3+ and Mo–O group. These results show that La 2 (MoO 4 ) 3 :Eu 3+ has excellent sensitivity and temperature resolution, good reversibility and reliability, as Sa = 0.0525 K -1 , Sr = 0.3724. % K −1 , ΔT = 0.0806 K and the FIR error was only 0.62%. Therefore, the Eu 3+ -doped La 2 (MoO 4 ) 3 is a promising candidate material for high performance non-contact optical thermometers.
研究领域:
材料科学
·
发光材料
·
光学传感
·
无机化学
·
功能材料
·
固体化学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 29
·10109-10114
·
IF 4
Juhe Liu,Yuwei Chen,Mengran Sun,Wenhao Liu,Xianghe Meng,Jiyong Yao
A new complex rare earth borate K7PbLu2B15O30 was prepared by the spontaneous crystallization method. K7PbLu2B15O30 is crystallized in the chiral trigonal space group R32 with cell parameters a = b = 13.0893(3) Å, c = 15.2379(6) Å, α = β = 90°, γ = 120°, and Z = 3. The basic structure of the crystal can be seen as composed of B5O10 groups and LuO6 polyhedra sharing oxygen atoms, while K+ and Pb2+ fill the space to balance the charge. The UV transmission cut-off edge of K7PbLu2B15O30 was less than 300 nm, and the powder SHG response was roughly 1.1 times that of KDP. Furthermore, a first-principles analysis was performed to see more about the relationship between the crystal structure and optical characteristics.
研究领域:
无机化学
·
材料科学
·
晶体工程
·
光学材料
·
固体化学
✓ 已验证
DOI
高影响因子
OPTICAL FIBER TECHNOLOGY
·
2013
·Vol. 20
·期 1
·28-31
·
IF 1.187
Jiao-Yang Li,Xu-Guang Huang,Wei Xu,Dong-Rui Xiao,Ze-Bing Zhong
A biocompatible fiber-optic pH sensor based on Fresnel reflection technique and a sensing coating is presented. Sodium alginate and polyethylenimine are alternatively deposited on the sensing fiber end to form the sensing coating via a layer-by-layer electrostatic self-assembly technique. An optical switch is added to the measurement system for the convenience of fast calibration. A linear, monotonic and fast response in a large pH range (from pH 5.87 to pH 10.55) is obtained with the resolution of 0.01 pH unit. The sensitivity of the pH sensor is 0.018 R.I.U/pH. It is not influenced by fluctuations of light source.
研究领域:
生物医学工程
·
传感技术
·
分子生物学
·
转化医学
·
生物材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Haisheng Chen,Wenwen Chen,Jiaying Shen,Xiaona Du,Tianhong Zhou,Zhengang Dong,Taiyu Bian,Jiaxing Guo,Yiyang Wen,Yuanlin Liang,Zhenping Wu,Yang Zhang
Developing smart luminescent materials with desirable and tunable characteristics has always been an overriding priority of fluorescence technology. However, huge challenges encompass the single functionality of the luminescent materials and the traditional chemical synthetic techniques with rigorously controlling over the miscellaneous experimental conditions and variables. Herein, the lanthanide-doped bismuth-layered ferroelectric (Na 0.5 Bi 0.5 ) 0.96 Er 0.04 Bi 2 Nb 2 O 9.02 has been prepared to be utilized as a platform that not only serves the in-situ and reversible tailoring of the upconverted emission via physical methods, but also enable the versatile functionalities such as photomemory and multi-modal temperature sensing. High luminescent contrast that can reach up to 83.7 % before and after the 405 nm irradiation has been realized on the basis of the photochromic phenomenon of the as-prepared (Na 0.5 Bi 0.5 ) 0.96 Er 0.04 Bi 2 Nb 2 O 9.02 sample, and the fundamental application in the photomemory has been exhibited. Moreover, the performances of triple-mode thermometry built on the fluorescent intensity ratio techniques ( 2 H 11/2 / 4 S 3/2 and 4 S 3/2 / 4 F 9/2 ) as well as the lifetime of the 4 S 3/2 excited state of the Er 3+ ion have been investigated in carefulness, with the maximal relative sensitivities of 1.22 % K −1 at 300 K, 0.92 % K −1 at 510 K, and 0.18 % K −1 at 450 K, respectively. Our results provide significant insights into the methodology of physically modulating the upconversion luminescence, and offer a glamorous pathway for multifunctional high-end applications.
研究领域:
材料科学
·
光学工程
·
功能材料
·
纳米光子学
·
传感技术
·
固态物理
·
智能材料
✓ 已验证
DOI
高影响因子
OPTICS AND LASER TECHNOLOGY
·
2023
·
IF 5
Shizhou Tan,Pengcheng Jian,Maocheng Shan,Yongming Zhao,Zhihua Zheng,Yiming Yang,Yuhui Zeng,Dan Xu,Zhenyu Chen,Changqing Chen,Feng Wu,Jiangnan Dai
In this work, we demonstrated tunable structured AlGaN-based nanoporous (NP) distributed Bragg reflectors (DBRs) with high-reflectivity through one-step vertical-lateral electrochemical etching (ECE). The aperture of nanopores in the doping layer and the size and density of V-pits on the surface of NP-DBRs can be tuned by controlling the etching bias. Furthermore, by further tuning the thickness of alternating layers, we achieved high reflectivity of NP-DBRs at multiple center wavelengths within the wavelength range from 280 to 800 nm. To explore its potential applications, MoS 2 with a photoluminescence (PL) emission in the red light region was grown for the first time on the NP-DBRs. Due to the light localized effect of surface V-pits and the high reflectivity of the bottom DBRs , the PL intensity of MoS 2 was significantly enhanced by a factor of 37.3 compared to the region without NP-DBRs. The PL enhancement of MoS 2 on porous AlGaN and different periodic NP-DBRs further validated the PL enhancement mechanism. The corresponding theoretical simulations also revealed that the PL enhancement should be attributed to the combined effect of enhanced light absorption and NP-DBRs induced emission interference. The fabricated AlGaN-based NP-DBRs provide a new approach for improving the quantum efficiency of two-dimensional layered materials, which holds significant importance for advancing the development of miniaturized and integrated 2D/3D heterogeneous structure systems in the field of optoelectronics.
研究领域:
光电子学
·
半导体材料
·
纳米光子学
·
二维材料
·
固体物理
·
表面科学
·
集成光子器件
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 30
·期 2
·1699-1705
·
IF 2.324
Teng Fei,Chen Dong,Ma Yuzhe,Ji Shaohua,Liu Jiaojiao,Wang Tianhua,Tang Jie,Cao Lifeng,Teng Bing
N,N -dimethylamino-4′-N′-methylstilbazolium 2,4,6-trimethylbenzenesulfonate (DSTMS)-graphene ex-situ and in-situ composite films with 2% concentration of graphene were first prepared and systematically investigated. The crystallinity of DSTMS-based composite films were confirmed by XRD analysis, and the functional groups of composite films can be obtained by FT-IR. Optical absorptions were recorded using UV–Vis-NIR spectral analysis, and the band gap and extinction coefficient of the films were calculated. The thermal stability of the composite films were analyzed by TG/DSC. The pressure sensitive resistance test showed that the pressure sensitive signal of the composite films were significantly increased after graphene added, while the signal of DSTMS film eventually disappears. This work expands the application of organic nonlinear crystal DSTMS in optics and electricity by doping graphene.
研究领域:
材料科学
·
凝聚态物理
·
功能材料
·
非线性光学
·
纳米复合材料
·
电学性能
·
光学性能
·
热分析
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Tianyao Ding,Dong Zheng,Huainan Qu,Weixiao Ji,Xiaoxiao Zhang,Dongping Lu,Gongwei Wang,Deyang Qu
An in-situ electrochemical optical diagnosis is the key to the investigation of electrode interface during a redox reaction . Because the morphology changes particularly, dendrite formation, dendrite shapes, solid electrolyte interface formation and gas generation can be revealed visually. The challenge of ensuring uniform current density on a flat Li anode in a liquid electrolyte is addressed and uniform Li plating is demonstrated. The dendrite shape change under different reduction current density is discussed. The Li dendrite shape change and the performance of Li anodes with a surface lamination of graphite and red phosphate are used as examples to demonstrate the capability of the in-situ optical cell. An in-situ electrochemical optical cell used in the investigation of the increasingly popular solid-state Li batteries has its own challenges. Due to the untransparent nature of a solid-state electrolyte, an optical investigation on a solid-state electrolyte Li battery needs to be done by exposing the cross-section of the cell. In addition, it is very difficult to assemble an optical cell with a brittle and fragile solid-state electrolyte in a glove box. A set of formation and transfer dies, and an optical cell are introduced. The Li dendrite growth at the interface can be observed in a solid-state Li cell.
研究领域:
电化学
·
材料科学
·
能源存储
·
固态电池
·
界面科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）