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Vapor-assisted epitaxial growth of porphyrin-based MOF thin film for nonlinear optical limiting

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Science China Chemistry 2020年第8期63卷 1059-1065页

作者： yi-Hong Xiao Zhi-Gang gu jian Zhang State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Beijing 100049China

Fabrication of metal-organic frameworks(MOFs)thin films has been an efficient way to expand their functionalities and ***,we use the vapor-assisted deposition(VAD)method to epitaxially grow a porphyrin-based MOF PCN-222 *** is,vapor source assists to deposit pre-treated precursor solution on quartz substrate to form a continuous PCN-222 ***,utilizing the post-treated encapsulation of functional carbon-based nanoparticles,the carbon nanodots(CND)and Pt doped CND(Pt/CND)are well loaded into the pores of PCN-222 film,the size(~3.1 nm)of which is highly close to the pore size of the corresponding MOF(~3.7 nm).The Z-scan results reveal that PCN-222 film exhibits high reverse saturable *** addition,encapsulation of carbon based nanodots into PCN-222 film could enhance the nonlinear optical limiting effect benefiting from the host-guest *** study serves to present both the available toolbox of thin film preparation and high potential for precise synthetic nanocomposite films in optical limiting devices.

关键词： metal-organic framework epitaxial growth porphyrin thin film nonlinear optical property

Electronic transport properties of Co cluster-decorated graphene

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Chinese Physics B 2018年第6期27卷 81-86页

作者： Chao-yi cai jian-Hao Chen International Center for Quantum Materials Peking UniversityCollaborative Innovation Center of Quantum Matte

Interactions of magnetic elements with graphene may lead to various electronic states that have potential *** report an in-situ experiment in which the quantum transport properties of graphene are measured with increasing cobalt coverage in continuous ultra-high vacuum environment. The results show that e-beam deposited cobalt forms clusters on the surface of graphene, even at low sample temperatures. Scattering of charge carriers by the absorbed cobalt clusters results in the disappearance of the Shubnikov–de Haas（Sd H） oscillations and the appearance of negative magnetoresistance（MR）which shows no sign of saturation up to an applied magnetic field of 9 T. We propose that these observations could originate from quantum interference driven by cobalt disorder and can be explained by the weak localization theory.

关键词： in situ quantum transport negative magnetoresistance weak localization

Recent progress on transition metal oxides and carbon-supported transition metal oxides as catalysts for thermal decomposition of ammonium perchlorate

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Defence Technology（防务技术） 2021年第4期17卷 1471-1485页

作者： Teng Chen yi-wen Hu cai Zhang Zhao-jian Gao School of Material and Chemical Engineering Xuzhou University of TechnologyXuzhouJiangsuPR China Xi’an Modern Chemistry Research Institute Xi’anShaanxiPR China Xuzhou University of Technology XuzhouJiangsuPR China

As a main oxidizer in solid composite propellants,ammonium perchlorate(AP)plays an important role because its thermal decomposition behavior has a direct influence on the characteristic of solid composite *** improve the performance of solid composite propellant,it is necessary to take measures to modify the thermal decomposition behavior of *** recent years,transition metal oxides and carbon-supported transition metal oxides have drawn considerable attention due to their extraordinary catalytic *** this review,we highlight strategies to enhance the thermal decomposition of AP by tuning morphology,varying the types of metal ion,and coupling with carbon *** enhanced catalytic performance can be ascribed to synergistic effect,increased surface area,more exposed active sites,and accelerated electron transportation and so *** mechanism of AP decomposition mixed with catalyst has also been briefly ***,a conclusive outlook and possible research directions are suggested to address challenges such as lacking practical application in actual formulation of solid composite propellant and batch manufacturing.

关键词： Transition metal oxides Carbon-supported transition metal oxides Catalyst Ammonium perchlorate Thermal decomposition

Channel estimation in TDD mode

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The Journal of China Universities of Posts and Telecommunications 2006年第3期13卷 34-37页

作者： ZHANG yi gu jian YANG Da-cheng School of Telecommunication Engineering Beijing University of Posts and Telecommunications Beijing 100876 China

An efficient solution is proposed in this article for the channel estimation in time division duplex （TDD） mode wireless communication systems. In the proposed solution, the characteristics of fading channels in TDD mode systems are fully exploited to estimate the path delay of the fading channel. The corresponding amplitude is estimated using the minimum mean square error （MMSE） criterion. As a result, it is shown that the proposed novel solution is more accurate and efficient than the traditional solution, and the improvement is beneficial to the performance of Joint Detection.

关键词： channel estimation MMSE TDD

Antioxidant Activities of Aqueous Extract from Cultivated Fruit-bodies of Cordyceps militaris （L.） Link In Vitro

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Journal of Integrative Plant Biology 2006年第11期48卷 1365-1370页

作者： Yu Zhan cai-Hong Dong yi-jian Yao Key Laboratory of Systematic Mycology and Lichenology Institute of Microbiology the Chinese Academy of Sciences Beijing 100080 China Graduate University of the Chinese Academy of Sciences Beijing 100049 China

Biological antloxldants extracted from plants and fungi have potential abilities to scavenge free radicals and Inhibit lipid peroxldatlon, playing Important roles in preventing diseases, for example, cancer, and aging Induced by reactive oxygen species, which may cause oxidative damage to DNA, proteins and other macromolecules. The antloxldant potency of cultivated fruit-bodies of Cordyceps militarls （L.） Link was investigated In this study. Five established In vitro systems were employed, including the 1,1-dlphenyl-2- plcryldrazyl （DPPH） free radical scavenging, hydroxyl radical eliminating, iron chelating, Inhibition of Ilnolelc acid lipid peroxldatlon and reducing power. The aqueous extract from cultivated fruit-bodies was subjected to the test of amino acid, polysaccharlde and mannitol. Ascorblc acid （Vc）, butylated hydroxytoluene （BHT） and ethylenedlamlnetetraacetlc acid （EDTA） were used as positive controls for comparisons. Among the assays, the aqueous extract of C. mllltarls frult-bodles shows a significant scavenging effect on DPPH, eliminating the capability on hydroxyl radicals and the chelating effect on ferrous Iron. The extract also shows positive results of Inhibiting Ilnoleic acid lipid peroxldatlon and reducing power.

关键词： antioxidation aqueous extract Cordyceps militaris free radicals in vitro.

MODIFIED NEWTON＇S ALGORITHM FOR COMPUTING THE GROUP INVERSES OF SINguLAR TOEPLITZ MATRICES

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Journal of Computational Mathematics 2006年第5期24卷 647-656页

作者： jian-feng cai Michael K. Ng yi-min Wei Department of Mathematics The Chinese University of Hong Kong Hong Kong Department of Mathematics Hong Kong Baptist University Hong Kong School of Mathematical Sciences Fudan University Shanghai 200433 China ~ Key Laboratory of Mathematics for Nonlinear Sciences (Fudan University) Ministry of Education

Newton＇s iteration is modified for the computation of the group inverses of singular Toeplitz matrices. At each iteration, the iteration matrix is approximated by a matrix with a low displacement rank. Because of the displacement structure of the iteration matrix, the matrix-vector multiplication involved in Newton＇s iteration can be done efficiently. We show that the convergence of the modified Newton iteration is still very fast. Numerical results are presented to demonstrate the fast convergence of the proposed method.

关键词： Newton's iteration Group inverse Toeplitz matrix Displacement rank.

Metal–Organic Framework‑Based Photodetectors

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Nano-Micro Letters 2024年第11期16卷 675-703页

作者： Jin‑Biao Zhang yi‑Bo Tian Zhi‑Gang gu jian Zhang State Key Laboratory of Structural Chemistry Structure of MatterFujian Institute of ResearchChinese Academy of SciencesFuzhouFujian 350002People’s Republic of China College of Chemistry and Materials Science Fujian Nornal UniversityFuzhou 350007FujianPeople’s Republic of China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou 350108FujianPeople’s Republic of China University of Chinese Academy of Science Beijing 100049People’s Republic of China

The unique and interesting physical and chemical properties of metal–organic framework(MOF)materials have recently attracted extensive attention in a new generation of photoelectric *** this review,we summarized and discussed the research progress on MOF-based *** methods of preparing MOF-based photodetectors and various types of MOF single crystals and thin film as well as MOF composites are introduced in ***,the photodetectors applications for X-ray,ultraviolet and infrared light,biological detectors,and circularly polarized light photodetectors are ***,summaries and challenges are provided for this important research field.

关键词： Metal-organic frameworks Semiconductor Photodetectors

Comparison of various procedures for progressive collapse analysis of cable-stayed bridges

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2012年第5期13卷 323-334页

作者： jian-guo cai yi-xiang XU Li-ping ZHUANG jian FENG Jin ZHANG Key Laboratory of C&PC Structures of Ministry of Education Southeast University Nanjing 210096 China Department of Civil Engineering Strathclyde University Glasgow UK

Alternate path(AP) method is the most widely used method for the progressive collapse analysis,and its application in frame structures has been well ***,the application of AP method for other structures,especially for cable-stayed structures,should be further *** four analytical procedures,i.e.,linear static,nonlinear static,linear dynamic,and nonlinear dynamic were firstly improved by taking into account the initial *** a cable-stayed structure was studied using the four improved ***,the losses of both one cable and two cables were *** results show that for static and dynamic analyses of the cable-stayed bridges,there is large difference between the results obtained from simulations starting with either a deformed or a nondeformed configuration at the time of cable *** static results are conservative in the vicinity of the ruptured cable,but the dynamic effect of the cable loss in the area farther away from the loss-cable cannot be ***,the dynamic amplification factor of 2.0 is found to be a good estimate for static analysis procedures,since linear static and linear dynamic procedures yield approximately the same maximum vertical *** results of the comprehensive evaluation of the cable failure show that the tread of the progressive failure of the cable-stayed bridges decreases when the location of the failed cables is closer to the pylon.

关键词： Progressive failure Structural failures Collapse Linear analysis Nonlinear analysis Dynamic analysis Cable-stayed bridges

Estrogen receptor expression in adrenocortical carcinoma

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2009年第1期10卷 1-6页

作者： Xiao-cao SHEN cai-xiao gu yi-qing QIU Chuan-jun DU Yan-biao FU jian-jun WU Urology Department School of Medicine Zhejiang University Hangzhou 310009 China Pathology Department School of Medicine Zhejiang University Hangzhou 310009 China Radiology Department the Second AJfiliated Hospital School of Medicine Zhejiang University Hangzhou 310009 China

Objective: Adrenocortical carcinoma (ACC) is a rare but highly malignant tumor, and its diagnosis is mostly delayed and prognosis is poor. We report estrogen receptor (ER) expression in this tumor and our clinical experiences with 17 ACC cases. Methods: The data of the 17 patients (9 females and 8 males, age range from 16 to 69 years, mean age of 42.6 years) with ACC were reviewed, and symptoms, diagnostic procedures, treatment, and results of follow-up were evaluated. Immunohistochemistry was used to detect ER expression in tumor samples from the 17 patients. Results: At the time of diagnosis, 4 tumors were classified as Stage I, 4 as Stage II, 3 as Stage III, and 6 as Stage IV. Eight patients demonstrated positive nuclear immunostaining of ER. The prognosis of patients with ER positive was significantly better (P<0.05) than that of patients with ER negative, with 1- and 5-year survival rates at 86% and 60% for ER-positive patients, and 38% and 0% for ER-negative patients, respectively. Conclusion: ER-positivity may be one of the factors associated with a worse prognosis of ACC.

关键词： Adrenocortical carcinoma (ACC) Estrogen receptor (ER) Diagnosis Treatment