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Surfactant-free oil/water and bicontinuous microemulsion composed of benzene,ethanol and water

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Chinese Chemical Letters 2010年第7期21卷 880-883页

作者： Fei Song Jie Xu wan guo hou Key Laboratory for Colloid and Interface Chemistry of Education Ministry Shandong UniversityJinan 250100China College of Chemistry and Molecular Engineering Qingdao University of Science and TechnologyQingdao 266042China

Generally,a microemulsion consists of oil,water,surfactant and sometimes ***,we report a novel suffactant-free microemulsion（denoted as SFME） composed of benzene,water and ethanol without the amphiphilic molecular structure of traditional *** phase behavior of the ternary system was investigated,finding that there were a single-phase region and a two-phase region in ternary phase *** electrical conductivity measurement was employed to investigate the microregion of the single-phase region,and a bicontinuous microregion and a benzene-in-water（O/W） microemulsion microregion were identified,which was confirmed by freeze-fracture transmission electron microscopy（FF-TEM） *** sizes of the microemulsion droplets are in the range of 20-50 nm.

关键词： Surfactant-free microemulsion Phase behavior Conductivity FF-TEM

From Zn-Al layered double hydroxide to ZnO nanostructure:Gradually etching by sodium hydroxide

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Chinese Chemical Letters 2012年第12期23卷 1415-1418页

作者： Gang Qiang wan Dong Xiang Li Chun Fang Li Jie Xu wan guo hou State Key Laboratory Base of Eco-chemical Engineering Lab of Colloids and Functional NanostructuresCollege of Chemistry and Molecular EngineeringQingdao University of Science and Technology Key Laboratory of Colloid and Interface Chemistry of Ministry of Education Shandong University

Zn-Al layered double hydroxide （LDH） was used as precursor to produce ZnO nanostructures through dissolution of aluminum hydroxide in caustic soda. The Zn-Al LDH could transform into different nanostructures of ZnO on LDH nanosheets and even pure ZnO nanorods under various NaOH concentration. The formed ZnO nanorods vertically aligned on both LDH sides. UV-vis diverse reflectance spectra show that the obtained ZnO nanorods have a band gap of approximately 3.05 eV. Such ZnO/LDH nanostructures might be used as photocatalyst in the organic pollutant decomposition.

关键词： Layered double hydroxide (LDH) ZnO Nanostructure

Coordination Structure of Aluminum in Magnesium Aluminum Hydroxide Studied by (27)Al NMR

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Chinese Chemical Letters 2003年第6期14卷 605-608页

作者： Shu Hua HAN wan guo hou Wen Xiu DANG Jun XU Key Lab of Colloid and Interface Chemistry of State Education Ministry Shandong UniversityJinan 250100

The coordination structure of aluminum in magnesium aluminum hydroxide was studied by 27Al NMR. The result showed that tetrahedral aluminum (AlIV) existed in magnesium aluminum hydroxide, and the contents of AlIV increased with the increase of the ratio of Al/Mg and with the peptizing temperature. AlIV originated from the so-called Al13 polymer with the structure of one Al tetrahedron surrounded by twelve Al octahedrons.

关键词： Coordination structure magnesium aluminum hydroxide 27Al NMR.

Studies on the Synthesis and the Structure of Ferric Aluminum Magnesium Hydrotalcite-like Compounds

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Chinese Chemical Letters 2002年第8期13卷 781-782页

作者： Shu Ping LI wan guo hou Peng JIANG Wei Qun ZHU Key Laboratry for Colloid and Interface Chemistry of Education Ministry Shandong UniversityJinan 250100

The particles of ferric aluminum magnesium hydrotalcite-like compounds (Fe-Al-Mg_HTlc) were synthesized by co-precipitation method. It was found that when n(Fe)/n(Al+Mg+Fe)0.30, Al(OH)3 will emerge; when the molar ratio of Fe/(Fe+Al+Mg) >0.30, the amorphous composition will appear. Hence Fe3+ and Al3+ have no concentration superposition effect on the crystal structure of the samples.

关键词： Hydrotalcite-like compounds co-precipitation synthesis.

Photochromism of 36-Armed Liquid Crystalline Dendrimer

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Chinese Chemical Letters 2005年第10期16卷 1371-1374页

作者： Jian Qiang LIU Qi Zhen ZHANG Jing Zhi ZHANG wan guo hou School of Physics and Microelectronics Shandong University Ji＇nan 250100 Key Laboratory of Education Ministry on Colloid ＆ Interface Chemistry Ji＇nan 250100 School of Chemistry and Chemical Engineering Shandong University Ji＇nan 250100

The photochromism of a 36-armed liquid crystalline dendrimer D6 was briefly described in this paper. The molar absorption coefficient, photoisomerization and photo back-isomerization of D6 in solution were investigated by UV/Vis absorption spectra. The results indicate that the photochromism and photo back-isomerization of D6 in chloroform （CHC13） and tetrahydrofuran （THF） solutions are in accordance with the ftrst order kinetics. The photochromism rate constants of D6 are 101 sI, it is 107 times larger than that of side-chain liquid crystalline polymers containing the same azobenzene moieties.

关键词： Photochromism liquid crystalline dendrimer photo back-isomerization.

Study on Isoelectric Point of Magnesium Aluminum Hydroxide

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Chinese Chemical Letters 1997年第1期8卷 87-90页

作者： Shu Hua HAN De Jun SUN wan guo hou Chun Guang ZHANG guo Ting wanG(Institute of Colloid and Interface Chemistry,Shandong University, Jinan, 250100) SHANDONG UNIV INST COLLOID & INTERFACE CHEMJINAN 250100PEOPLES R CHINA

Yoon's equation which predicted point of zero charge of complex oxide should predict the zero point of net charge (ZPNC) of mixture of variable and permanent charge rather than the point of zero charge (PZC) of the va... 详细信息

关键词： Jun Study on Isoelectric Point of Magnesium Aluminum Hydroxide IEP

Light People:*** May Lau,newly elected US NAE member in Hong Kong,talks about future of photonics and women in science

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Light(Science & Applications) 2024年第4期13卷 602-608页

作者： Yating wan Chenzi guo Electrical and Computer Engineering the ComputerElectrical and Mathematical Sciences and Engineering DivisionKing Abdullah University of Science and Technology23955-6900 ThuwalSaudi Arabia Changchun Institute of Optics Fine Mechanics and PhysicsChinese Academy of SciencesChangchunChina

Editorial Photonics technology remains a driving force in today’s scientific landscape,marked by continuous innovation and crossdisciplinary *** an enlighting conversation with Light:Science&Applications,*** May Lau,a pioneer in photonics research,shares her deep insights on the evolution of technologies of LEDs,lasers,challenges of hetero-epitaxy,and the future of micro-LEDs and quantum dot *** honored as a member of the US National Academy of Engineering(NAE)for her significant contributions to photonics and electronics using III-V semiconductors on silicon,*** stands out as the sole Hong Kong scholar inducted into the NAE this year,joining 114 new and 21 international *** this exclusive Light People interview,*** shares her journey as a pioneering woman in engineering,her commitment to mentorship and academia,and her perspective on advancing female representation in *** summary provided is distilled from ***’s thoughtful responses during the *** a deeper exploration of ***’s experiences and advice,the full interview is available in the Supplementary material.

关键词： interview lighting driving

Harnessing data using symbolic regression methods for discovering novel paradigms in physics

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Science China(Physics,Mechanics & Astronomy) 2024年第6期67卷 1-11页

作者： Jianyang guo wan-Jian Yin College of Energy Soochow Institute for Energy and Materials Innovations(SIEMIS)Jiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy TechnologiesSoochow UniversitySuzhou 215006China Shanghai Qi Zhi Institute Shanghai 200232China Light Industry Institute of Electrochemical Power Sources Soochow UniversitySuzhou 215006China

In recent years,machine-learning methods have profoundly impacted research in the interdisciplinary fields of ***,most machine-learning models lack interpretability,and physicists doubt the credibility of their conclusions because they cannot be combined with prior physical ***,this review focuses on symbolic regression,which is an interpretable machine-learning ***,the relevant concepts of machine learning are introduced in conjunction with ***,we provide an overview of symbolic regression ***,the recent directions for the application of symbolic regression methods in different subfields of physics are outlined,and an overview of the ways in which the applications of symbolic regression have evolved in the realm of physics is *** major aim of this review is to introduce the basic principles of symbolic regression and explain its applications in the field of physics.

关键词： machine learning genetic programming symbolic regression

Optimal regularity of positive solutions of the Hénon-Hardy equation and related equations

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Science China Mathematics 2024年第10期67卷 2283-2302页

作者： Zongming guo Fangshu wan College of Mathematics and Information Science Henan Normal UniversityXinxiang 453007China School of Mathematical Sciences University of Science and Technology of ChinaHefei 230026China School of Mathematical Sciences Anhui UniversityHefei 230601China

We present a new method to determine the optimal regularity of positive solutions u∈C^(4)(Ω\{0})∩C^(0)(Ω) of the Hénon-Hardy equation,i.e.,Δ^(2)u=|x|^(α)u^(p)inΩ,(0,1) where Ω■RN(N≥4) is a bounded smooth domain with 0∈Ω,α>-4,and p∈*** is clear that 0 is an isolated singular point of solutions of(0.1) and the optimal regularity of u in Ω relies on the parameter α.It is also important to see that the regularity of u at x=0 determines the regularity of u in Ω.We first establish asymptotic expansions up to arbitrary orders at x=0 of prescribed positive solutions u ∈C^(4)(Ω{0}) ∩ C^(0)(Ω)of(0.1).Then we show that the regularity at x=0 of each positive solution u of(0.1) can be determined by some terms in asymptotic expansions of the related positive radial solution of the equation(0.1) with Ω=B,where B is the unit ball of R^(N).The main idea works for more general equations with singular weights.

关键词： H´enon-Hardy equation positive solutions optimal regularity singular point asymptotic expansions