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Calculation method of quantum efficiency to TiO_2 nanocrystal photocatalysis reaction

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Journal of Environmental Sciences 2002年第1期14卷 70-75页

作者： XIE Yi bing, YUAN Chun wei (National laboratory of molecular & Biomolecular electronics, Southeast University, Nanjing 210096, China.) Southeast University National Laboratory of Molecular & Biomolecular Electronics Nanjing 210096

The quantum yield is an important factor to evaluate the efficiency of photoreactor. This article gives an overall calculation method of the quantum efficiency( Φ ) and the apparent quantum efficiency( Φ a) to the TiO 2/UV photocatalysis system. Furthermore, for the immobility system (IS), the formulation of the faction of light absorbed by the TiO 2 thin film is proposed so as to calculate the quantum efficiency by using the measured value and theoretic calculated value of transmissivity (T). For the suspension system(SS), due to the difficulty to obtain the absorption coefficient ( α ) of TiO 2 particulates, the quantum efficiency is calculated by means of the relative photonic efficiency ( ζ r) and the standard quantum yield ( Φ standard ).

关键词： photodegradation reaction quantum efficiency apparent quantum efficiency photonic efficiency relative photonic efficiency absorption coefficient

A New Approach on the Active Treatment for Electroless Copper Plating on Glass

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Chinese Journal of Chemistry 2003年第1期21卷 1-3页

作者：刘正春贺全国汤建新肖鹏峰何农跃陆祖宏 Key laboratory for molecular and Bio-molecular electronics of Ministry of Education Southeast University

A new method is described for the electroless deposition of copper onto glass. Commercially available glass slide was modified with γ-aminopropyltrimethoxysilane to form self-assembled monolayer (SAM) on it. Then it was dipped directly into PdCl_2 solution instead of the conventional SnCl_2 sensitization followed by PdCl_2 activation. Experimental results showed that the Pd 2+ ions from PdCl_2 solution were coordinated to the amino groups on the glass surface resulting in the formation of N-Pd complex. In an electroless copper bath containing a formaldehyde reducing agent, the N-Pd complexes were reduced to Pd 0 atoms, which then acted as catalysts and initiated the deposition of copper metal. Although the copper deposition rate on SAM-modified glass was slow at the beginning, it reached to that of conventional method in about 5 min.

关键词： self-assembled monolayer electroless copper plating activation

Surface Plasmon Resonance Investigations of Photoinduced Changes in Liquid Crystalline Azobenzene Polymer Langmuir-Blodgette Films

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Chinese Physics Letters 1997年第11期14卷 849-852页

作者： GU Jian-hua CHEN Yi-wen LIANG Bing-jie LU Bin LU Zu-hong National laboratory of molecular and Bimolecular electronics Southeast UniversityNanjing 210096

In this letter,we report a novel phenomenon of photoisomerization-induced changes in liquid crystalline azobenzene polymers P12 Langmuir-Blodgette monolayer deposited on gold film by irradiating the monolayer with UV(360nm)and blue(450nm)lights,which was investigated by surface plasmon resonance *** has been shown that it is possible to switch the refractive indices reversibly by irradiating these films with light of appropriate wavelength.

关键词： technique. monolayer benzene

Thermally triggered topological polymerization in diacetylene-functionalized covalent organic framework toward enhanced memristive properties

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Science China Chemistry 2025年

作者： Panke Zhou Yuxing Huang Ziyue Yu Cong Zhang Qian Chen Yiping Li Chao Lin Xiong Chen State Key laboratory of Photocatalysis on Energy and Environment Key Laboratory of Advanced Carbon-Based Functional MaterialsCollege of Chemistry Fuzhou University

The development of stimuli-responsive switching memory devices and the elucidation of their switching mechanisms in specific environments are crucial for advancing the field of molecular electronics. Herein, we propose two distinct two-dimensional covalent organic frameworks (COFs), namely Py-EDA and Py-BDA, incorporating acetylene (-C≡C-) or diacetylene(-C≡C-C≡C-) moieties, respectively, targeting fabricate memory devices exhibiting stimuli-responsive switching *** findings demonstrate that the incorporation of acetylene units effectively modulates the electronic band structure and enhances the degree ofπ-conjugation, resulting in devices that exhibit typical bipolar nonvolatile memory performance. Notably,upon thermal treatment, the memory behavior of the ITO/Py-BDA/Ag device transitions to a write-once-read-many-times(WORM) mode, displaying decreased SET voltage, increased ON/OFF current ratio, and remarkable retention reliability and cycle stability. This switching behavior is attributed to the occurrence of interlayer solid-state topological polymerization at 350℃, leading to the transformation of diacetylene columnar arrays into enyne chains within Py-BDA, thereby further promoting interlayer charge transfer and separation.

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Electroless silver plating for metallization of near-field optical fiber probes

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Chinese Optics Letters 2007年第10期5卷 594-595页

作者：李昌安徐丽娜顾宁 Hefei Center for Disease Control & Prevention National laboratory of molecular and Biomolecular electronics Southeast University

By using mercaptopropyltrimethoxysilane （MPTS） self-assembled monolayers （SAMs）, electroless silver plating is developed for the metallization of near-field optical fiber probes. This method has the advantages of controllability, no pinholes, convenience, low cost, and smooth tip surface. The metallized probes are characterized by optical microscopy, scanning electron microscopy （SEM）, and energy dispersive X-ray spectroscopy （EDXS）.

关键词： Electroless plating Fiber optic sensors Metallizing Optical microscopy Scanning electron microscopy Self assembled monolayers X ray spectroscopy

Blue-Green Electroluminescent Diodes Utilizing Tris (8-Quinolinolato)-Aluminum Doped Poly (Vinylcarbazole)

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Chinese Physics Letters 1994年第7期11卷 454-456页

作者： MA Yuguang TANG Jianguo LIU Shiyong ZHANG Ruifeng SHEN Jiacong National laboratory of Integrated Optic electronics Key laboratory of molecular Spectra and Structure Jilin UniversityChangchun 130023

Blue-green electroluminescent diodes utilizing tris(8-Quinolino1ato)-aluminum doped poly(vinylcarbazole)have been demonstrated.A Schottky-type electroluminescent diode of the polymer film is driven at 20V and has a pe... 详细信息

关键词： Schottky diodes Electroluminescent

Photoluminescence and Electroluminescence of Poly p-Phenyl Phenol Prepared by Enzymatic Catalyzed Polymerization

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Chinese Physics Letters 1994年第6期11卷 387-389页

作者： MA Yuguang TANG Jianguo MA Lin LIU Shiyong SHEN Jiacong The National laboratory of Integrated Optic electronics The National laboratory of Enzyme Engineering The Key laboratory for molecular Spectra and Structure Jilin UniversityChangchun 130023

The photoluminescence(PL)peak of poly p-phenyl phenol(PPP)is at about 370-420nm excited by the light at *** absorption band edges and photon emitting peaks of the polymer are found the conjugated lengths dependent on molecular weight of *** the transient luminescence measurement the lifetime of PL decay is determined to be 2.0ns which is supposed an evidence of polaron excitation *** electroluminescence is observed with aluminum/PPP/indium-tinoxide cell.

关键词： Phenol Polymerization excited

Polymorphism of domains in phase-separated mixed monolayer films investigated by atomic force microscopy

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Chinese Science Bulletin 1996年第2期41卷 127-130页

作者：吴海明肖守军韦钰 National laboratory of molecular and Biomolecular electronics Southeast University Nanjing 210096 China

The domain structures of amphophilic molecules at the air-water interface have beenwidely studied by fluorescence and Brewster angle microscopy over the past ten ***, these studies were mainly focused on the transition from the liquid-expanded(LE) phase to the liquid-condensed (LC) phase in a one-component monolayer. Therewere only a few reports dealing with the direct observation of domain structures in

关键词： mixed monolayer film domain atomic force microscopy.

Carriers Confinement for Polymer Electroluminescent Devices with Multilayer Structure

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Chinese Physics Letters 1995年第7期12卷 428-430页

作者： MA Yuguang TIAN Wenjing XUE Shanhua HUANG Jinsong LIU Shiyong SHEN Jiacong Key laboratory of molecular Spectra and Structure Changdun 130023 National laboratory of Integrated Optical electronics Jilin UniversityChangdun 130023

The polymer electroluminescence (EL) device with PBD as carriers confinement layer yields bright blue emission having intensity of 300cd/m^(2),in same case the device without PBD layer have luminance only 44 cd/m^(2).The effect of PBD layer on EL characteristic was *** results show that only in EL devices with PBD thick-ness over 30nm,the holes are completely confined in emitting *** luminance over 2000cd/m^(2) can be obtained by inserting an electron injecting layer between the negative electrode and PED to increase the electron injection.

关键词： layer electrode thick