CHEMICAL PHYSICS LETTERS
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2012
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IF 2.337
Hao-Di Wu,Yan Xiao,Ge-Bo Pan
Micro rings of organic NPB have been prepared by evaporating chloroform solution on a silicon surface, which is assisted with a template of water droplets. The topography and optical properties of NPB rings were investigated by microscopy techniques. It is found that the polarized fluorescence microscope images of rings show pronounced polarization related to their central angle Φ . This indicates that the NPB molecules within a ring are ordered. Systematic investigation indicates that the water droplets condensed on silicon are essential for the ring formation. Such strategy is available for other small molecules, e.g., fullerene, porphyrin, and phthalocyanine.
研究领域:
材料科学
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光学
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分子自组装
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DOI
高影响因子
CRYSTENGCOMM
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2012
·Vol. 14
·期 6
·1933-1935
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IF 3.842
Yan Xiao,Meng Zhang,Feng-Xia Wang,Ge-Bo Pan
Hierarchical flower-shaped NPB architectures are prepared via a facile solvent evaporation method and investigated by means of SEM, TEM, FT-IR, and XRD. The results indicate that each NPB flower is composed of a number of randomly oriented nanoflakes, which are single crystals and connect with each other. Furthermore, time-dependent experiments reveal that the NPB flowers are formed via a heterogeneous nucleation, coupled with “Ostwald ripening”. The densely packed films of NPB flowers, which can withstand extreme conditions, e.g., high temperature, strong acid, and strong alkali possess a durable water-repellent property.
研究领域:
材料科学
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表面化学
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DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
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2015
·Vol. 15
·期 8
·6015-6019
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IF 1.556
Wu Hao-Di,Xiao Yan,Liu Zheng-Hui,Wang Feng-Xia,Pan Ge-Bo
2D microstructures of N′N′-diphenyl-N,N′-bis(1-naphthyl)-1,1'-biphenyl-4,4'-di-amine (NPB) have been prepared by a facile solution method and fully characterized. The as-prepared NPB microsheets have well-defined shapes and very smooth surfaces, and are
ideal building blocks for 2D optical waveguides. The results indicate that the optic losses within NPB microsheets are closely related to the direction of propagation, and the shape of microsheets can change the direction of waveguiding light. Such 2D optical waveguides may have potential
applications in future miniaturized light-based circuits serve as interconnectors different from 1D optical waveguides.
研究领域:
材料科学
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光学
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光子学
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DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
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2024
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IF 9.7
Ye Xiao,Xiaomin Zhu,Huihui Zheng,Qin Tang,Rongliang Qiu
Rice husk is a locally available biomass for preparation of adsorbents to deal with cadmium (Cd) contamination in paddy system. In this study, phosphorylation of rice husk using H 3 PO 4 and NH 4 H 2 PO 4 was carried out in the presence of urea at 165℃ to obtain APB-C and NPB-C, respectively. According to the material characterizations, phosphonyl groups were successfully grafted on the rice husk. Both APB-C and NPB-C had high performance for Cd(II) adsorption with the capacities of 146 and 129 mg/g, respectively. The main mechanism of Cd(II) adsorption was ion exchange with NH 4 + . The adsorption capacity was linearly corelated with phosphorus content (R 2 = 0.9997), while the Langmuir constant had high correlation efficient (R 2 = 0.996) with phosphonyl group percentage. Further quantum chemical calculation showed higher interaction energy between Cd(II) and phosphonyl group than other groups. These results indicated that phosphonyl group governed Cd(II) adsorption on phosphorylated biomass.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
Science Advances
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2025
·Vol. 11
·期 29
·
IF 12.5
Qian Teng,Qinghua Tan,Mengyue Hou,Jiajia Zhang,Fanglong Yuan
Lead-free tin perovskites present remarkable environmental advantages over lead-based counterparts. While substantial progress has been made with three-dimensional (3D) and 2D tin perovskite LEDs (PeLEDs), the potential of 0D tin perovskites—renowned for their exceptional optical properties and enhanced stability—remains largely unexplored for PeLEDs due to challenges in charge transport and injection. In this study, we introduce a binary host-guest strategy that overcomes these challenges, enabling the demonstration of bright and efficient 0D tin PeLEDs with orange and white light emission. By incorporating 0D tin bromide hybrid (HDAD) 3 SnBr 8 into a meticulously designed binary host system, we achieved PeLEDs with a maximum brightness exceeding 7500 candela meters −2 and an external quantum efficiency surpassing 7%. The remarkable device performance is primarily attributed to improved film morphology, enhanced charge carrier mobility, and optimized carrier balance. Furthermore, by tailoring the device structure, we realized white LEDs with a maximum luminance of 1800 candela meters −2 .
研究领域:
材料科学
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光电子学
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纳米技术
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环境科学
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固态照明
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2021
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IF 6.165
Sha Li,Xing Hu,Junhui Pan,Deming Gong,Guowen Zhang
The inhibition of pancreatic lipase by apigenin, a natural dietary flavonoid, was investigated by various spectroscopic techniques and computational simulation. The results showed that apigenin reversibly inhibited pancreatic lipase activity in a competitive manner with an IC 50 value of 0.45 ± 0.03 mM, and its combination with orlistat showed a synergistic effect. Formation of a complex between apigenin and pancreatic lipase driven by hydrogen bonds resulted in the fluorescence quenching of the enzyme through a static manner. The binding constant of apigenin with the enzyme was (5.47 ± 0.01) × 10 4 L mol −1 at 298 K, and the kinetic process of their interaction was characterized by the resolved concentration profiles and pure spectra of different components from the multivariate curve resolution-alternating least squares algorithm. The inhibition of pancreatic lipase by apigenin was mainly attributed to the tighter structure of the enzyme and the interaction between apigenin and the amino acid residues in the active center of the enzyme to prevent the substrate from being oxidized, as demonstrated by the analysis of circular dichroism spectra and molecular docking. Molecular dynamics simulation further characterized the binding conformation and property of apigenin-pancreatic lipase complex. This study provides novel insights into the mechanism of apigenin as pancreatic lipase inhibitor and the development of apigenin as an anti-obesity nutrient.
研究领域:
药理学
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生物化学
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分子生物学
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营养学
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产品关联
DOI
高影响因子
Small Methods
·
2022
·Vol. 6
·期 4
·2101509
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IF 15.367
Xiaojie Zhou,Yichen Cai,Mingsheng Xu,Jianping Li,Chenxu Sheng,Qiuyi Zhang,Xinxia Qiu,Wenchong Wang,Shisheng Xiong,Chunxiao Cong,Zhi-Jun Qiu,Ran Liu,Laigui Hu
The emergence of near-eye displays, such as head-mounted displays, is triggering a requirement for highly enhanced display resolution. High-resolution micro-displays with micro-organic light-emitting diodes (micro-OLEDs) can be a preferential candidate, owing to the mature industrialization of OLEDs along with the advantages of flexibility, light weight, and ease of processing. However, micro-OLEDs with pixel sizes down to micrometers are difficult to be achieved using conventional techniques such as fine metal mask evaporation and lithography. Here, a solution-processing approach to pattern organic semiconductors (OSCs) for micro-OLED arrays with the assistance of templated dewetting is demonstrated. Solvents containing organic functional materials are dewetted on the surface with hydrophobic/hydrophilic patterns to form ordered droplet arrays using dip-coating. Subsequently, patterned OSC films are produced by effectively controlling solvent evaporation. Micro-OLED arrays with a pixel size down to 1 µm are successfully fabricated by further deposition of emitting/electron transport layers and top electrodes. This approach can open an avenue for low-cost manufacturing of flexible and high-resolution micro-displays.
研究领域:
材料科学
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显示技术
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有机电子学
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产品关联
DOI
PubMed
高影响因子
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