Journal of Physical Chemistry C
·
2021
·
IF 4.126
Shixu Yang,Chenghao Bi,Jianjun Tian
Metal halide perovskite colloidal quantum dots (QDs) show great potential application for lighting and high-definition displays because of their wide color gamut (∼140%), high photoluminescence quantum yield (PLQY), and narrow emission widths. However, they face a big challenge to obtain directly highly pure white light-emitting colloidal QDs with a single component. Here, we devise a bromide-ligand-assisted synthesis method to prepare white light-emitting Mn2+-doped perovskite colloidal QDs. The didodecyldimethylammonium bromide (DDAB) is used to trigger both anion and ligand exchanges of Mn/CsPbCl3 QDs. By regulating the exchange reactions, the balanced emission intensities of the band edge emission of the QD host and Mn2+ emission are achieved to obtain white light emission. Moreover, the Br– ions from DDAB can bond with uncoordinated Pb2+ of the QD surface, thereby reducing the surface trap density of QDs. As a result, the QDs show pure white light emission with a Commission International de l’Eclairage (CIE) coordinate value of (0.31, 0.33) and a high photoluminescence yield of 66%. This work demonstrates a novel strategy for pure white light-emitting diodes using single-component perovskites.
研究领域:
材料科学
·
光电子学
·
纳米技术
·
照明技术
✓ 已验证
DOI
高影响因子
Smart Medicine
·
2023
·
IF 0
Danna Liang,Gaizhen Kuang,Xiang Chen,Jianhua Lu,Luoran Shang,Weijian Sun
Nitric oxide (NO) has shown great potential in tumor therapy, and the development of a platform for precise and controllable NO release still needs to be explored. Herein, a microfluidic electrospray strategy is proposed for the fabrication of hydrogel microspheres encapsulating NO donors (S-nitrosoglutathione, GSNO) together with black phosphorus (BP) and chemotherapeutic doxorubicin (DOX) as microcarriers for tumor therapy. Based on the excellent photothermal property of BP and thermal sensitivity of GSNO, the microcarriers exhibit a near-infrared light (NIR)-responsive NO release behavior. Besides, the photothermal performance of the microcarriers accelerates the release of DOX. All these contribute to the excellent tumor-killing effect of the microcarriers by combining multiple therapeutic strategies including NO therapy, photothermal therapy, and chemotherapy. Moreover, it was demonstrated that the NIR-responsive NO delivery microcarriers could significantly inhibit tumor growth without apparent side effects in vivo. Therefore, it is believed that the novel NIR-responsive NO microcarriers are promising candidates in clinical tumor therapy applications.
研究领域:
生物医学工程
·
肿瘤学
·
药剂学
✓ 已验证
DOI
International Journal of Applied Ceramic Technology
·
2024
·Vol. 22
·期 1
·e14888
·
IF 1.8
Qi Sha,Jianjun Xie,Yesen Duan,Wenyu Tang,Jingxian Zhang
Digital light processing (DLP) three-dimensional printing has the advantages of both high printing resolution and efficiency and has been used to manufacture high-precision, small, and complex shaped ceramic parts. One of the challenges of DLP is to develop photosensitive ceramic slurries with high solid content and low viscosity, especially for non-oxide ceramics such as silicon nitride due to the dispersion and light absorption problem. This study mainly explores the dispersibility of silicon nitride in ultraviolet (UV)-cured resins and the photocured properties of the slurry. Rheological measurements were utilized to characterize and screen different dispersants in the resin. It was found that DISPERMP is an effective dispersant. In order to improve the curing depth of Si 3 N 4 photosensitive paste, the surface of silicon nitride powder was treated by oxidation, and organic compounds with different refractive indices were also introduced to increase the light penetration depth. It was found that glycerol with a refractive index of 1.474 resulted in the greatest improvement in the curing depth of Si 3 N 4 photosensitive paste. Finally, a proposed slurry composition was developed to successfully print silicon nitride ceramics through UV-curing molding technology.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2011
·Vol. 13
·期 6
·2071-2076
·
IF 4.006
Weimin Du,Dehua Deng,Zhitao Han,Wei Xiao,Cheng Bian,Xuefeng Qian
Single-crystalline, hexagonal tin disulfide (SnS2) nanoplatelets were successfully synthesized through an improved solvothermal process with SnCl4·5H2O and carbon disulfide (CS2) as precursors. The crystal phase, morphology, and crystal lattice of the prepared products were characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM), respectively. Results reveal that the synthesized SnS2 nanoplatelets are in the hexagonal structure with 20–60 nm in diameter and 7–10 nm in thickness. The structural and HRTEM analysis indicates that the formation of SnS2 nanoplatelets with hexagonal morphology result from the accelerating growth of six energetically equivalent high-index crystalline planes {110} and the retarded growth of {001} crystalline planes. The photocatalytic degradation properties of hexagonal SnS2 nanoplatelets driven by solar light were further investigated with Rhodamine B (RhB) as simulating pollutant. Results show that these SnS2 nanoplatelets have a good performance of photocatalytic degradation on RhB, and the decolorizing rate can reach 97.7% after being irradiated for 70 min by solar light. Better photocatalytic properties indicate that hexagonal SnS2 nanoplatelets are a type of promising photocatalyst driven by solar light and have potentially applied prospects in wastewater treatment and environmental protection.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2022
·Vol. 10
·期 17
·2200386
·
IF 10.05
Yue-Yue Ma,Yu-Ming Sun,Wen-Jie Xu,Xue-Lei Liu,Qian-Qian Zhong,Ying-Rui Song,Han-Qi Fu,Cheng-Yang Yue,Xiao-Wu Lei
Despite remarkable luminescent performance of 0D lead halide perovskites, achieving highly efficient blue light emission is extremely challenging and crucial for this domain. Considering the high toxicity of Pb 2+ ion, it is significant to explore water-stable lead-free 0D halides as highly efficient and stable blue emitting materials. To address these issues, a family of 0D hybrid zinc halides of AZnBr 4 (A = EP, BP, and TMPDA) based on discrete [ZnBr 4 ] 2− tetrahedrons is herein reported as desirable blue light emitters. The wide band gaps enable these 0D halides to display highly efficient blue light emissions (452–485 nm) with highest photoluminescence quantum yield (PLQY) of 35.47%. More importantly, all these 0D halides present extraordinary chemical stabilities in humid air and water for one month, and are also capable of withstanding extreme pH conditions in the range of 0–14, likely the widest observed pH range for perovskites. Notably, the ultrahigh chemical stabilities of 0D zinc halides are nearly unmatchable among all known literature perovskite materials to the best of the authors’ knowledge. Combined superiorities of unusual blue light emission, promising PLQY, ultrahigh stability, and non-toxicity highlight the potential optoelectronic applications in wide chemical environments for these 0D zinc halides.
研究领域:
材料科学
·
光学
·
化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·Vol. 43
·期 3
·3314-3318
·
IF 2.758
Gao-yu Zhao,Yu Zhang,Lin Jiang,Hong-mei Zhang
A series of NiTiO 3 /Ag 3 PO 4 composites were prepared by a simple ion-exchange deposition method . The composition and morphology of the samples were determined by XRD , EDS and SEM. UV–vis DRS was used to characterize their optical absorption properties. The loading of NiTiO 3 could promote the efficient separation of photoinduced electron-hole pairs and enhance the charge carrier transport to improve the photocatalytic activity . The APO-5 composite exhibited the best photocatalytic activity for the degradation of methyl violet (MV). Kinetics studies indicated that the APO-5 composite showed an apparent rate constant of 0.115 min −1 , which was 2.61 times that of pure Ag 3 PO 4 .
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2021
·
IF 5.165
Yufeng Zhou,Yanxia Yu,Yaqian Zhang,Xiaodong Liu,Haisheng Yang,Xiaojuan Liang,Wei Xia,Weidong Xiang
All-inorganic halide perovskite (CsPb2Br5) nanocrystals (NCs) have received widespread attention owing to their unique photoelectric properties. This work reports a novel strategy to control the phase transition from CsPbBr3 to CsPb2Br5 and investigates the effects of different treatment times and treatment temperatures on perovskite NCs formation. By controlling the volume of tetraethoxysilane (TEOS) added, the formation of different phases of perovskite powder can be well controlled. In addition, a white light-emitting diode (WLED) device is designed by coupling the CsPbBr3/CsPbBr3–CsPb2Br5 NCs@TEOS nanocomposite and CaAlSiN3:Eu2+ commercial phosphor with a 460 nm InGaN blue chip, exhibiting a high luminous efficiency of 57.65 lm/W, color rendering index (CRI) of 91, and a low CCT of 5334 K. The CIE chromaticity coordinates are (0.3363, 0.3419). This work provides a new strategy for the synthesis of CsPbBr3/CsPbBr3–CsPb2Br5 NCs@TEOS nanocomposite, which can be applied to the field of WLEDs and display devices.
研究领域:
材料科学
·
光电子学
·
纳米技术
·
发光二极管（LED）
·
光子学
✓ 已验证
DOI
高影响因子
OPTICS AND LASERS IN ENGINEERING
·
2024
·
IF 3.5
Zhiling Zhang,Yuecheng Shen,Shile Yang,Jiawei Luo,Zhengyang Wang,Daixuan Wu,Xiaodie Hu,Zhengqi Huang,Yu He,Mengdi Guo,Huajie Chen,Dalong Qi,Yunhua Yao,Lianzhong Deng,Zhenrong Sun,Shian Zhang
Optical fiber tweezers have proven highly effective in precisely manipulating and trapping microscopic particles. Most existing demonstrations use single-mode fibers, which require tapered ends and are limited to single-particle control. Although multimode fibers (MMFs) can generate arbitrary structured light fields by transmitting multiple spatial modes simultaneously, inherent mode crosstalk renders the transmitted light field uncontrollable. In this study, we demonstrate MMF optical tweezers capable of manipulating and trapping multiple microspheres by projecting structured light, achieving performance comparable to that of holographic optical tweezers. By employing neural networks to guide active wavefront shaping and mitigate mode crosstalk, we achieved precise projection of structured light fields. Our experimental setup, which includes a green laser and a digital micromirror device, enabled the generation of focused and structured light through the MMF. We successfully manipulated single microspheres along a defined path and trapped multiple microspheres simultaneously using ring-shaped structured light. These results highlight the versatility and potential of MMF optical tweezers for advanced optical manipulation applications.
研究领域:
光学
·
光子学
·
光学操控
·
生物光子学
·
光学中的机器学习
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 5
·770
·
IF 4.034
Kai Gu,Hongshang Peng,Siwei Hua,Yusong Qu,Di Yang
A series of stable and color-tunable MAPbBr3−xClxquantum dot membranes were fabricated via a cost-efficient high-throughput technology. MAPbBr3−xClxquantum dots grown in-situ in polyvinylidene fluoride electrospun nanofibers exhibit extraordinary stability. As polyvinylidene fluoride can prevent the molecular group MA+from aggregating, MAPbBr3−xClxquantum dots are several nanometers and monodisperse in polyvinylidene fluoride fiber. As-prepared MAPbBr3−xClxquantum dot membranes exhibit the variable luminous color by controlling the Cl−content of MAPbBr3−xClxquantum dots. To improve blue-light emission efficiency, we successfully introduced Ag nanoparticle nanofibers into MAPbBr1.2Cl1.8quantum dot membranes via layer-by-layer electrospinning and obtained ~4.8 folds fluorescence enhancement for one unit. Furthermore, the originality explanation for the fluorescence enhancement of MAPbBr3−xClxquantum dots is proposed based on simulating optical field distribution of the research system.
研究领域:
材料科学
·
纳米技术
·
光电子学
·
光子学
·
量子点
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2015
·Vol. 3
·期 33
·8519-8525
·
IF 4.696
Baozhong Lv,Zhen Wu,Chendong Ji,Wantai Yang,Dongpeng Yan,Meizhen Yin
Systems that exhibit light-driven fluorescence change have received much attention due to their applications in luminescent switches or as sensors. However, such solid-state systems are still limited relative to those in solution form, and how to obtain photochromic fluorescent film materials for use in device fabrication is a long-standing problem. In this work, one-dimensional (1D) solid-state microcrystals combining a host molecule cyclodextrin (CD) and UV-responsive guest molecule spiropyran (SP) have been developed, which present a light-driven fluorescence change based on the isomerization of the SP molecule in the CD matrix. Firstly, the supramolecular forces including inherent hydrogen bonding and hydrophobic interactions in this self-assembled system were studied using electrospray ionization mass spectrometry (ESI-MS), isothermal titration calorimetry (ITC), and Fourier transform infrared spectra (FTIR). The scanning electron microscopy (SEM) comparison between the SP@CD system and the pristine CD or SP confirms that the SP guest plays a crucial role in the formation of 1D microcrystals. Then, through a spin-casting process, a thin film of SP@CD microcrystals was further fabricated, which shows a reversible photochromic fluorescence between fluorescence-free and high red-emission states. Moreover, the open-ring form of SP@CD microcrystals also presents two-photon emission and polarized fluorescence. Therefore, this work has offered a facile way to obtain a reversible photochromic fluorescent film, which may be applied in dynamic light-controlled fluorescent sensors and two-photon imaging.
研究领域:
材料科学
·
光化学
·
超分子化学
·
荧光传感器
·
光学功能材料
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2015
·Vol. 3
·期 17
·9116-9122
·
IF 7.443
Kun Cao,Jin Cui,Hua Zhang,Hao Li,Jinkui Song,Yan Shen,Yibing Cheng,Mingkui Wang
Efficient mesoscopic CH3NH3PbI2Br perovskite solar cells have been prepared based on the TiO2/Al2O3/carbon architecture. An appreciable power conversion efficiency of 11.03% was achieved under AM 1.5G illumination. This system combines the superior stability of MAPbI2Br and no requirement of a hole conductor layer.
研究领域:
光伏技术
·
材料科学
·
可再生能源
✓ 已验证
DOI
高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 35
·e202303743
·
IF 1.9
Yifeng Liu,Yanheng Xu,Ruxian Zhou,Haichao Wei,Wuri Zhang,Huasheng Zhan,Shulong Ma,Chen Yang,Zhaohui Huang
In the process of the development of the ceramic industry, a large amount of ceramic solid waste is generated, and how to make high-value reuse of ceramic solid waste has also become a problem of common concern. In this article, a new method of making porous thermal insulation materials reusing waste electric porcelain was successfully developed. In this work, a porous light refractory with bulk density of 0.99 g/cm 3 and apparent porosity of 59% was prepared by the novel method. Which room temperature flexural and compressive strengths are 11.52 MPa and 1.84 MPa, respectively. These properties makes the waste electric porcelain-based porous light refractory can be applicated as lightweight heat insulation materials for high-temperature kilns, high-temperature catalyst carriers, high-temperature phase-change heat storage support materials, etc., which will create higher application value and research significance. Graphical In this article, a new method of making porous thermal insulation refractory reusing waste electric porcelain was successfully developed. by this method, we prepared a sample with favorable bulk density of 0.81 g/cm 3 and apparent porosity of 61 %, and the room temperature flexural and compressive strengths are 11.52 Mpa and 1.84 Mpa.
研究领域:
材料科学
·
陶瓷工程
·
废弃物资源化利用
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）