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光合放氧复合物锰簇光组装 被引量:3
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作者 韩广业 李淑芹 匡廷云 《化学进展》 SCIE CAS CSCD 北大核心 2010年第8期1556-1565,共10页
在光系统Ⅱ水氧化过程中,由锰簇及其附近一个具氧化还原活性的酪氨酸YZ组成的光合放氧复合物通过4个连续的氧化还原反应将水裂解为质子和氧气。在光系统Ⅱ的功能性组装过程中,光合放氧复合物锰簇是通过一个被称作光组装的过程形成的。... 在光系统Ⅱ水氧化过程中,由锰簇及其附近一个具氧化还原活性的酪氨酸YZ组成的光合放氧复合物通过4个连续的氧化还原反应将水裂解为质子和氧气。在光系统Ⅱ的功能性组装过程中,光合放氧复合物锰簇是通过一个被称作光组装的过程形成的。结合当前的研究进展,本文详尽地介绍了光合放氧复合物锰簇光组装的动力学模型、与锰簇形成相关的蛋白及锰簇的外围配体、锰与去锰光系统Ⅱ的结合特性、其他辅助因子对锰簇光组装的影响及锰簇光组装的机理。此外,结合我们的研究结果,对人工合成的锰化合物与去锰光系统Ⅱ放氧复合物的光组装进行了综述和讨论。本文最后介绍了目前光合放氧复合物锰簇结构及功能研究中存在的一些问题,并对光合放氧复合物锰簇结构及功能研究的应用前景进行了展望。 展开更多
关键词 系统Ⅱ 放氧复合物 锰簇 光组装 合水氧化机理
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Mn_2Ca双金属簇合物组装去Mn光系统II水氧化复合物的研究
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作者 凌琳 陈桂英 +5 位作者 王文国 陈惠 李淑芹 陈昌能 刘秋田 匡廷云 《化学学报》 SCIE CAS CSCD 北大核心 2007年第10期983-988,共6页
报道了Mn2Ca双金属簇合物与去锰的PSII颗粒的光组装过程,发现Mn2Ca化合物具有明显的恢复去锰PSII的电子传递和放氧活性的能力,并且表现了比MnCl2更高的光组装效率.我们认为该化合物中Ca与Mn原子之间的羧酸酯桥的连接方式可能有利于水氧... 报道了Mn2Ca双金属簇合物与去锰的PSII颗粒的光组装过程,发现Mn2Ca化合物具有明显的恢复去锰PSII的电子传递和放氧活性的能力,并且表现了比MnCl2更高的光组装效率.我们认为该化合物中Ca与Mn原子之间的羧酸酯桥的连接方式可能有利于水氧化复合物(WOC)的光组装及锰簇的稳定. 展开更多
关键词 系统Ⅱ 水氧化复合物 Mn2Ca 簇合物 光组装
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光突发交换网络中的突发分组组装策略 被引量:1
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作者 郭彦涛 刘增基 《电讯技术》 2005年第1期178-181,共4页
光突发交换(OBS)技术集成光电路交换和光分组交换的优势,能满足现有大容量、高速率的多媒体信息交换与传输,将成为下一代光IP骨干网的核心技术。本文详细论述了OBS网络中的关键技术———突发分组的组装技术的各种策略与实现方式,指出... 光突发交换(OBS)技术集成光电路交换和光分组交换的优势,能满足现有大容量、高速率的多媒体信息交换与传输,将成为下一代光IP骨干网的核心技术。本文详细论述了OBS网络中的关键技术———突发分组的组装技术的各种策略与实现方式,指出具有良好QoS保证又可降低可操控性的突发组装策略将成为最佳选择。 展开更多
关键词 通信网 突发交换 突发分组组装 IP OVER WDM
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21世纪的光表面组装技术
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作者 王德贵 《电子信息(印制电路与贴装)》 2000年第9期51-53,共3页
关键词 表面组装技术 SMT 微电子
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21世纪的光表面组装技术
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作者 王德贵 《电子电路与贴装》 2003年第7期63-64,共2页
关键词 表面组装技术 电子 SMT 电印刷板
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异步光分组交换网的流量建模 被引量:1
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作者 潘勇 叶培大 《光通信研究》 北大核心 2005年第1期12-14,29,共4页
研究了异步光分组交换网的流量特性,提出了网络流量的解析模型和近似模型。研究表明,在采用计时门限光分组组装算法的情况下,如输入IP流具有短程相关特性(ShortRangeDependent),则光分组的到达间隔时间呈负指数分布,光分组的长度趋于高... 研究了异步光分组交换网的流量特性,提出了网络流量的解析模型和近似模型。研究表明,在采用计时门限光分组组装算法的情况下,如输入IP流具有短程相关特性(ShortRangeDependent),则光分组的到达间隔时间呈负指数分布,光分组的长度趋于高斯分布。 展开更多
关键词 流量特性分析 流量建模 异步分组交换 分组组装算法
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Facile preparation of nanocrystal-assembled hierarchical mordenite zeolites with remarkable catalytic performance 被引量:9
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作者 袁扬扬 王林英 +4 位作者 刘红超 田鹏 杨淼 徐舒涛 刘中民 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2015年第11期1910-1919,共10页
The present study reports a novel strategy to fabricate nanocrystal-assembled hierarchical MOR zeolites. This is the first demonstration of hierarchical MOR without preferential growth along the c-axis, which facilita... The present study reports a novel strategy to fabricate nanocrystal-assembled hierarchical MOR zeolites. This is the first demonstration of hierarchical MOR without preferential growth along the c-axis, which facilitates mass transfer in the 12-membered ring channels of MOR zeolite for the conversions involving bulky molecules. The facile method involves the combined use of tetraethylammonium hydroxide (TEAOH) and commercial surfactants, in which TEAOH is essential for the construction of nanocrystal assemblies. The surfactant serves as a crystal growth-inhibiting agent to further inhibit nanocrystalline particle growth, resulting in enhanced mesoporosity. The hierarchical MOR assembled particles, constructed of 20-50-nm crystallites, exhibit superior catalytic properties in the alkylation of benzene with benzyl alcohol compared with the control sample, as the hierarchical MOR possesses a larger external surface area and longer c-axis dimension. More importantly, the material shows improved activity and stability in the dimethyl ether carbonylation to methyl acetate reaction, which is a novel route to produce ethanol from syngas. 展开更多
关键词 Nanocrystal-assembled Mordenite Tetraethylammonium hydroxide Surfactant Catalytic activity
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光弹性分组环节点光分组的组装及时延分析 被引量:1
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作者 王嵚 吴重庆 魏斌 《光学学报》 EI CAS CSCD 北大核心 2009年第4期897-901,共5页
分析了光弹性分组环(ORPR)网络中流量成型时光分组组装算法,提出一种适合ORPR网络的基于控制发送时间的光分组组装算法,并给出了该算法的算法结构。该算法在混合门限组装算法的基础上,通过增加一个控制分组发送间隔的参数,使得光分组单... 分析了光弹性分组环(ORPR)网络中流量成型时光分组组装算法,提出一种适合ORPR网络的基于控制发送时间的光分组组装算法,并给出了该算法的算法结构。该算法在混合门限组装算法的基础上,通过增加一个控制分组发送间隔的参数,使得光分组单位时间内流量的突发性被平滑,并可以保证ORPR网络的服务质量(QoS)性能,适合于使用容量有限光缓存的ORPR网络。对ORPR节点光分组平均组装时延进行了详细的分析,新算法通过对分组发送间隔的调整,使在不同负载条件下,组装时延的概率分布基本相同。在ORPR中,平均组装时延的稳定对ORPR网络的QoS性能和公平性调度有重要意义,而发送时机的合理选择,可以保证ORPR网络的QoS性能以及公平性。仿真结果表明,新算法使得ORPR网络中的光分组平均组装时延相对稳定,在大多数情况下,可以保证ORPR网络的调度要求。 展开更多
关键词 通信 分组组装 仿真 时延
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Microwave-assisted ionothermal synthesis of hierarchical microcube-like BiOBr with enhanced photocatalytic activity 被引量:4
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作者 Yingchun Miao Zichao Lian +1 位作者 Yuning Huo Hexing Li 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2018年第8期1411-1417,共7页
Bismuth oxybromide(BiOBr) with a hierarchical microcube morphology was successfully synthesized via microwave-assisted ionothermal self-assembly method. The as-obtained BiOBr was composed of regular multi-layered na... Bismuth oxybromide(BiOBr) with a hierarchical microcube morphology was successfully synthesized via microwave-assisted ionothermal self-assembly method. The as-obtained BiOBr was composed of regular multi-layered nanosheets, which were formed by selective adsorption of ionic liquids on the Br-terminated surface, followed by the formation of hydrogen bond-co-π-π stacking.The synthesized BiOBr exhibited high activity, excellent stability, and superior mineralization ability in the photocatalytic degradation of organic dyes under visible light owing to its enhanced light absorbance and narrow bandgap. Furthermore, photo-generated electrons were determined to be the main active species by comparison with different trapping agents used in the photocatalytic reactions. 展开更多
关键词 Microwave BiO BrmicrocubesSelf‐assembly Photocatalytic degradation Mineralization ability
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Structural engineering of 3D hierarchical Cd0.8Zn0.2S for selective photocatalytic CO2 reduction 被引量:13
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作者 Lei Cheng Dainan Zhang +2 位作者 Yulong Liao Jiajie Fan Quanjun Xiang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2021年第1期131-140,共10页
The solar-driven catalytic conversion of CO2 to useful chemical fuels is regarded as an environmentally friendly approach to reduce the consumption of fossil fuels and mitigate the greenhouse effect.However,it is high... The solar-driven catalytic conversion of CO2 to useful chemical fuels is regarded as an environmentally friendly approach to reduce the consumption of fossil fuels and mitigate the greenhouse effect.However,it is highly intriguing and challenging to promote the selectivity and efficiency of visible-light-responsive photocatalysts that favor the adsorption of CO2 in photoreduction processes.In this work,three-dimensional hierarchical Cd0.8Zn0.2S flowers(C8Z2S-F)with ultrathin petals were successfully synthesized through an in-situ self-assembly growth process using sodium citrate as a morphology director.The flower-like Cd0.8Zn0.2S solid solution exhibited remarkable photocatalytic performance in the reduction of CO2,generating CO up to 41.4μmol g^−1 under visible-light illumination for 3 h;this was nearly three times greater than that of Cd0.8Zn0.2S nanoparticles(C8Z2S-NP)(14.7μmol g^−1).Particularly,a comparably high selectivity of 89.9%for the conversion of CO2 to CO,with a turnover number of 39.6,was obtained from the solar-driven C8Z2S-F system in the absence of any co-catalyst or sacrificial agent.Terahertz time-domain spectroscopy indicated that the introduction of flower structures enhanced the light-harvesting capacity of C8Z2S-F.The in situ diffuse reflectance infrared Fourier transform spectroscopy unveiled the existence of surface-adsorbed species and the conversion of photoreduction intermediates during the photocatalytic process.Empirical characterizations and predictions of the photocatalytic mechanism demonstrated that the flower-like Cd0.8Zn0.2S solid solution possessed desirable CO2 adsorption properties and an enhanced charge-transfer capability,thus providing a highly effective photocatalytic reduction of CO2. 展开更多
关键词 Cd0.8Zn0.2S flowers Self-assembly growth Photocatalytic CO2 reduction High selectivity Visible-light irradiation
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In situ synthesis of Ti^(3+) self-doped mesoporous TiO_2 as a durable photocatalyst for environmental remediation 被引量:3
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作者 温美成 章姗姗 +2 位作者 戴文锐 李贵生 张蝶青 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2015年第12期2095-2102,共8页
This study developed a facile approach for in situ synthesis of a Ti3+ self-doped mesoporous TiO 2photocatalyst by an evaporation-induced self-assembly method using TiC l3,water,and F127 as the titanium precursor,sol... This study developed a facile approach for in situ synthesis of a Ti3+ self-doped mesoporous TiO 2photocatalyst by an evaporation-induced self-assembly method using TiC l3,water,and F127 as the titanium precursor,solvent,and soft template agent,respectively. The as-prepared samples were investigated by X-ray diffraction,N2 adsorption-desorption measurements,ultraviolet-visible diffuse reflectance spectroscopy,electron paramagnetic resonance,and transmission electron microscopy. The influence of different reaction parameters such as the dosage of F127 and calcination temperature on the photocatalytic performance of the resulting products was evaluated. The optimized product exhibited high photocatalytic activity and stability in the oxidation of nitric oxide in air and photocatalytic degradation of methylene blue. The excellent photocatalytic performance of the Ti3+ self-doped mesoporous TiO 2 photocatalyst is attributed to the cooperation between the mesoporous structure and self-doped Ti3+ enhancing light absorption and effectively suppressing the recombination of photogenerated electrons and holes. 展开更多
关键词 Titanium(III) self-doping Mesoporous titanium dioxide Evaporation-induced self-assembly Nitric oxides oxidation PHOTOCATALYSIS
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Photocatalytic degradation of formaldehyde using mesoporous TiO_2 prepared by evaporation-induced self-assembly 被引量:5
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作者 黎成勇 贾艳荣 +2 位作者 张向超 张世英 唐爱东 《Journal of Central South University》 SCIE EI CAS 2014年第11期4066-4070,共5页
The mesoporous Ti O2 has been synthesized by evaporation induced self assembly(EISA) method. The thermogravimetric/differential scanning calorimetric(TG/DSC), X-ray diffraction(XRD), high-resolution transmission elect... The mesoporous Ti O2 has been synthesized by evaporation induced self assembly(EISA) method. The thermogravimetric/differential scanning calorimetric(TG/DSC), X-ray diffraction(XRD), high-resolution transmission electron microscopy(HR-TEM) and N2 adsorption desorption and adsorption are used to study the effects of the synthesized process condition on the microstructure of the as-synthesized mesoporous Ti O2. The photocatalytic performances of as-synthesized samples are evaluated by the degradation of the formaldehyde under ultraviolet light irradiations. The results demonstrate that the as-synthesized mesoporous Ti O2 are anatase with the uniform size about 20-40 nm. The sample is prepared using cetyltrimethyl ammonium bromide(CTAB) as the template with average pore size distribution of 8.12 nm, specific surface area of 68.47 m2/g and pore volume of 0.213 m L/g. The samples show decomposition of formaldehyde 95.8% under ultraviolet light irradiations for 90 min. These results provide a basic experimental process for preparation mesoporous Ti O2, which will posses a broad prospect in terms of the applications in improving indoor air quality. 展开更多
关键词 mesoporous TiO2 photocatalysis formaldehyde evaporation induced self assembly(EISA)
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A novel dicobalt-substituted tungstoantimonate polyoxometalate: Synthesis,characterization,and photocatalytic water oxidation properties 被引量:1
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作者 Qing Han Di Sun +2 位作者 Junwei Zhao Xiangming Liang Yong Ding 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2019年第6期953-958,共6页
The one-pot assembly reaction of a trilacunary,lone-pair-containing[B-α-SbW9O33]9.precursor with Co2+ions in an aqueous medium led to the isolation of a novel{SbO3(H2O)3}bridging,dicobalt-substituted,sandwich-type tu... The one-pot assembly reaction of a trilacunary,lone-pair-containing[B-α-SbW9O33]9.precursor with Co2+ions in an aqueous medium led to the isolation of a novel{SbO3(H2O)3}bridging,dicobalt-substituted,sandwich-type tungstoantimonate{Co2Sb2(H2O)10[B-β-SbW9O33]2}^4–(1a).This compound was structurally characterized in the solid state by single-crystal X-ray diffraction,elemental analyses,thermogravimetric analysis,and IR spectroscopy.The most remarkable feature was that 1a comprises two trilacunary[B-β-SbW9O33]9^-fragments trapping a novel,centrally symmetric,rhomb-like{Co2Sb2}belt with 10 terminal water molecules.When combined with the photosensitizer[Ru(bpy)3]^2+and the sacrificial electron acceptor S2O82.,1a exhibited efficient catalytic activity for water oxidation with a remarkable turnover number(TON)of 193,initial turnover frequency(TOFinitial)of 5.3 s^-1,O2 yield of 30.8%,and quantum yield(ФQY)of 36.2%under light-driven conditions. 展开更多
关键词 Light-driven water oxidation Tungstoantimonate SELF-ASSEMBLY
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Effect of inter-layer strain interaction on the optical properties of Ge/Si(001) island multi-layers
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作者 M. De Seta G. Capelllini +5 位作者 F. Evangelisti C. Ferrari L. Lazzarini G. Salviati R. W. Pengs S.S.Jiang 《Optoelectronics Letters》 EI 2007年第3期173-176,共4页
In this paper we present a study on the influence of the number and the thickness of silicon spacer layer on the optical properties of single-and multi-layers of self assembled Ge/Si(001) islands performed by means of... In this paper we present a study on the influence of the number and the thickness of silicon spacer layer on the optical properties of single-and multi-layers of self assembled Ge/Si(001) islands performed by means of cathodoluminescence spectroscopy,high resolution X-ray diffraction and transmission electron microscopy. In single-layer sample,we do not evidence dependence of the island no-phonon emission peak position on the silicon cap-layer thickness. In multi-layer samples having a thin(33 nm) silicon spacer layer the no-phonon emission energy value progressively blue-shifts for an increasing number of island layers. This is interpreted as an enhanced intermixing driven by the strain interaction existing between island layers. On the contrary,island emission energy position is independent on the number of layers in the sample series having a thicker spacer layer(60 nm) . These findings are consistent with the X-ray diffraction observation that islands belonging to different layers have the same composition. As a consequence we can conclude that multilayers with 60-nm spaced islands layer are more homogeneous and ordered. 展开更多
关键词 层间应变作用 锗/硅(001)多层纳米岛 学性能 组装
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Preparation of composite abrasives by electrostatic self-assembly method and its polishing properties in Cu CMP
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作者 Huang Yishen Xu Xuefeng +2 位作者 Yao Chunyan Hu Jiande Peng Wei 《Engineering Sciences》 EI 2014年第2期75-81,92,共8页
The adsorption characteristics of cationic polyelectrolyte poly dimethyl diallyl ammonium chloride (PDADMAC) and anionic polyelectrolyte poly (sodium-p-styrenesulfonate) (PSS) on benzoguanamine formal- dehyde (... The adsorption characteristics of cationic polyelectrolyte poly dimethyl diallyl ammonium chloride (PDADMAC) and anionic polyelectrolyte poly (sodium-p-styrenesulfonate) (PSS) on benzoguanamine formal- dehyde (BGF) particles are investigated. The charging characteristics of BGF particles are changed and con- trolled using electrostatic self-assembly method. A variety of PE,-BGF/SiO2 composite abrasives are obtained. The as-prepared samples are analyzed by zeta potential analysis, transmission electron microscope (TEM) and thermogravimetric (TG) analysis. The composite abrasive slurries are prepared for copper polishing. The poli- shing results indicate that it is SiO2 abrasives, not only coated SiO2 abrasive on polymer particles but also free SiO2 abrasive in slurry, that offer the polishing action. The material removal rates of copper polishing are 264 nm/min, 348 nm/min and 476 nm/min using single SiO2 abrasive slurry, PE0-BGF/SiO2 mixed abrasive slur- ry and PE3-BGF/SiO2 composite abrasive slurry, respectively. The surface roughness Ra of copper wafer (with 5μm×5μm district) is decreased from 0.166 μm to 3.7 nm, 2.6 nm and 1.5 nm, and the surface peak-valley values Rrv are less than 20 nm, 14 nm and 10 nm using these kinds of slurries, respectively. Key words : chemico-mechanical polishing; polishing slurry; composite abrasives ; polyelectrolyte ; copper 展开更多
关键词 chemico-mechanical polishing polishing slurry composite abrasives POLYELECTROLYTE copper
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Intermolecular Interactions in Self-Assembly Process of Sodium Dodecyl Sulfate by Vertically Polarized Raman Spectra
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作者 王钰熙 林珂 +2 位作者 陈琳 周晓国 刘世林 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2017年第4期365-371,I0001,共8页
Molecular self-assembly is extremely important in many fields, but the characterization of their corresponding intermolecular interactions is still lacking. The C-H stretching Raman band can reflect the hydrophobic in... Molecular self-assembly is extremely important in many fields, but the characterization of their corresponding intermolecular interactions is still lacking. The C-H stretching Raman band can reflect the hydrophobic interactions during the self-assembly process of sodium dodecyl sulfate (SDS) in aqueous solutions. However, the Raman spectra in this region are seriously overlapped by the OH stretching band of water. In this work, vertically polarized Raman spectra were used to improve the detection sensitivity of spectra of C-H region for the first time. The spectral results showed that the first critical micelle concentration and the second critical micelle concentration of SDS in water were 8.5 and 69 mmol/L, respectively, which were consistent with the results given by surface tension measurements. Because of the high sensitivity of vertically polarized Raman spectra, the critical micelle concentration of SDS in a relatively high concentration of salt solution could be obtained in our experiment. The two critical concentrations of SDS in 100 mmol/L NaCl solution were recorded to be 1.8 and 16.5 mmol/L, respectively. Through comparing the spectra and surface tension of SDS in water and in NaCl solution, the self-assembly process in bulk phase and at interface were discussed. The interactions among salt ions, SDS and water molecules were also analyzed. These results demonstrated the vertically polarized Raman spectra could be employed to study the self-assembly process of SDS in water. 展开更多
关键词 Vertically polarized Raman spectroscopy Sodium dodecyl sulfate SELF-ASSEMBLY Critical micelle concentration Intermolecular interactions
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Hydrogen Bonding-Mediated Assembly of Perelene Dianhydride and Pyridine Derivatives
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作者 Shi Wu Qi-wen Teng 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 北大核心 2006年第1期76-78,共3页
Semi-empirical AMI method was used to study 1:1 and 1:2 hydrogen bond complexes formed with perylene dianhydride and pyridine derivatives. The weak interaction energy become bigger as the number of hydrogen bonds in... Semi-empirical AMI method was used to study 1:1 and 1:2 hydrogen bond complexes formed with perylene dianhydride and pyridine derivatives. The weak interaction energy become bigger as the number of hydrogen bonds increases. The donor groups on the host and electron-withdrawing groups on the guest molecules favor hydrogen bonding interactions, and the formation of hydrogen bonding leads to electron density flow from the host to the guest molecules. Electronic spectra of these complexes were computed using INDO/SCI method. Blue-shift of the clectronic absorption spectra for the complexes, comparing that of the host, takes place, and the first peaks for different complexes changed slightly. These are in agreement with the experimcntal results. The cause of blue-shift was discussed, and the electronic transitions were assigned based on theoretical calculations. The potential curve of double proton transfer in the complex was calculated, and the transition state and activated energy relative to the N H bond were obtained. 展开更多
关键词 Perylene dianhydride Hydrogen bonding assembly Electronic spectra AMI
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Recombination Efficiency and Width in Bilayer Organic Light-emitting Devices
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作者 PAN Yan-zhi LI Hong-jian +3 位作者 DAI Xiao-yu FANG An-le LI jia ZHU Ru-hui 《Semiconductor Photonics and Technology》 CAS 2006年第1期5-9,共5页
A bilayer model with ohmic anode contact and injection limited cathode contact has been proposed to calculate the recombination efficiency and recombination zone width of the device. The effects of the thickness of ho... A bilayer model with ohmic anode contact and injection limited cathode contact has been proposed to calculate the recombination efficiency and recombination zone width of the device. The effects of the thickness of hole transport layer and the barriers of organic/organic interface on the combination efficiency and recombination width have been discussed. It is found that: (1) When the electrons are blocked fully and the holes are not blocked significantly at the organic/organic interface, for a given Lh/L, the recombination efficiency increases with increasing the applied voltage, but at a higher applied voltage, the recombination efficiency decreases with increasing Lh/L; (2) The recombination efficiency increases with increasing applied voltage and Hh', and when applied voltage and Hh' exceed some value, the recombination efficiency appears as a plateau; (3) The recombination width decreases with increasing the applied voltage and Lh/L. This model might explain the relative experiment phenomena. 展开更多
关键词 Organic light-emitting devices Hole transport layer Recombination efficiency Recombination width
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Intracellular Self-assembly of TPE-biotin Nanoparticles Enables Aggregation-Induced Emission Fluorescence for Cancer-Targeted Imaging
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作者 Yi-fei Xu Jin-hui Jiang 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2018年第6期851-856,734,共7页
Fluorogens with aggregation-induced emission (AIE) characteristics have recently been widely applied for studying biological events, and fluorogens with “smart” properties are especially desirable. Herein, we ration... Fluorogens with aggregation-induced emission (AIE) characteristics have recently been widely applied for studying biological events, and fluorogens with “smart” properties are especially desirable. Herein, we rationally designed and synthesized a biotinylated and reduction-activatable probe (Cys(StBu)-Lys(biotin)-Lys(TPE)-CBT (1)) with AIE properties for cancer-targeted imaging. The biotinylated probe 1 can be actively uptaken by the biotin receptor-overexpressing cancer cells, and then “smartly” self-assemble into nanoparticles inside cells and turn the fluorescence “On”. Employing this “smart” strategy, we successfully applied probe 1 for cancer-targeted imaging. We envision that this biotinylated intelligent probe 1 might be further developed for cancer-targeted imaging in routine clinical studies in the near future. 展开更多
关键词 TETRAPHENYLETHYLENE BIOTIN SELF-ASSEMBLY Aggregation-induced emission
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Tunneling Electron Induced Fluorescence from Single Porphyrin Molecules Decoupled by Striped-Phase Octanethiol Self-assembled Monolayer
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作者 邝艳敏 郁杰 +4 位作者 骆阳 朱嘉哲 廖源 张杨 董振超 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2016年第2期157-160,I0001,共5页
We investigate tunneling electron induced luminescence from isolated single porphyrin molecules that are decoupled by striped-phase self-assembled monolayer of octanethiol from the underneath Au(111) substrate. Intr... We investigate tunneling electron induced luminescence from isolated single porphyrin molecules that are decoupled by striped-phase self-assembled monolayer of octanethiol from the underneath Au(111) substrate. Intrinsic single-molecule electroluminescence has been realized by such decoupling at both bias polarities. The photon emission intensity acquired from the molecular lobe is found stronger than that from the molecular center. These re- sults provide useful information on the understanding of electroluminescent behavior and mechanism in molecular tunnel junctions. 展开更多
关键词 Scanning tunneling microscope induced luminescence PLASMONICS PORPHYRIN Octanethiol Self-assembled monolayer Striped-phase
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