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Synthesis and optical properties of poly[(4-(benzoxazole-2-yl)phenyl)methyl methacrylate] with 1,8-naphthalimide end group

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Chinese Science Bulletin 2009年第1期54卷 59-65页

作者： JIN ZhengNeng XU QingFeng LU JianMei YAN Feng XIA XueWei wang lihua LI NaJun Key Laboratory of Organic Synthesis of Jiangsu Province College of Chemistry and Chemical Engineering Suzhou University Suzhou 215123 China

A series of homopolymers,poly[(4-(benzoxazole-2-yl)phenyl)methyl methacrylate] (NAPH-PMABEs) containing benzoxazole side chain and 1,8-naphthalimide end group,were prepared by atom transfer radical polymerization (ATRP) and end-group modification. The structure of NAPH-PMABE was char-acterized by GPC,1H-NMR and UV-vis spectra. The polymer has good solubility in common organic solvents,such as dichloromethane (CH2Cl2),tetrahydrofuran (THF),N,N-dimethylformamide (DMF),chloroform (CHCl3),acetone and toluene. The optical properties of NAPH-PMABE were investigated. Results show that NAPH-PMABE has a composite emission spectrum comprising an ultraviolet com-ponent originating from benzoxazole side chains and a green component originating from 1,8-naphthalimide end group in both solution and film. The intensity of the two emission bands can be easily tuned by changing molecular weight.

关键词：苯并唑化合物聚合物光谱学

Multiplexed Superresolution CRISPR Imaging of Chromatin in Living Cells

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CCS Chemistry 2019年第3期1卷 278-285页

作者： Shaopeng wang Yaya Hao Luhao Zhang Fei wang Jiang Li lihua wang Chunhai Fan Division of Physical Biology and Bioimaging Center Shanghai Synchrotron Radiation FacilityCAS Key Laboratory of Interfacial Physics and TechnologyShanghai Institute of Applied PhysicsUniversity of the Chinese Academy of SciencesChinese Academy of SciencesShanghai 201800China School of Chemistry and Chemical Engineering and Institute of Molecular MedicineRenji HospitalSchool of MedicineShanghai Jiao Tong UniversityShanghai 200240China

Visualization of the spatiotemporal organization of chromatin is highly desirable in the study of genome function *** regularly interspa-ced short palindromic repeats(CRISPR)/CRISPR-associated endonuclease system has shown great promise for application in real-time chromatin imag-ing due to its DNA targeting ability in living *** studies typically used fluorescent proteins to generate fluorescent signals which,however,have trade-offs among signal intensity,multiplexibility,and simplicity.

关键词： CRISPR chromatin imaging multicolor cell imaging superresolution

Hierarchical Self-assembly of Atomically Precise Au Nanoclusters with Molecular Rotor-based Ligands

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Chemical Research in Chinese Universities 2024年第4期40卷 670-674页

作者： wang Guanzhong LU Hui LI Jiang wang lihua ZHU Ying SONG Shiping GE Zhilei LI Qian CHEN Jing FAN Chunhai Division of Physical Biology Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai201800P.R.China University of Chinese Academy of Sciences Beijing100049P.R.China Zhangjiang Laboratory Shanghai201210P.R.China Institute of Materiobiology Department of ChemistryCollege of SciencesShanghai UniversityShanghai200444P.R.China School of Chemistry and Chemical Engineering New Cornerstone Science LaboratoryFrontiers Science Center for Transformative MoleculesZhangjiang Institute for Advanced Study and National Center for Translational MedicineShanghai Jiao Tong UniversityShanghai200240P.R.China

The hierarchical assemblies of precise nanoparticles(NPs)have created materials with emergent properties and ***,the complex assemblies remain unclear at a precise ***,we show the hierarchical self-assembly of atomically precise gold nanoclusters(Au NCs)with molecular rotor-based ligands(MRL),featuring a double-layer *** to two other types of monolayer-protected(MLP)Au NCs,the significantly reduced surface density for MRL Au NCs profoundly influences their assembly behavior within the ***,the long length of rotor-based ligands and the rotational freedom of the phenyl-rings of rotor-based ligands also facilitate the assembly of *** works elucidate the hierarchical assembly on a precise scale,suggesting that the rotor-based ligand’s strategy offers promising potential for designing well-defined and more complex structures in supercrystals.

关键词： Gold nanocluster Molecular rotor Hierarchical assembly Double-layer surface

Atomic disorders in layer structured topological insulator SnBi2Te4 nanoplates

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Nano Research 2018年第2期11卷 696-706页

作者： Yi-Chao Zou Zhi-Gang Chen Enze Zhang Fantai Kong Yan Lu lihua wang John Drennan Zhongchang wang Faxian Xiu Kyeongjae Cho Jin Zou Materials Engineering University of Queensland Brisbane Australia Centre for Future Materials University of Southern Queensland Springfield Australia Laboratory of Surface Physics and Department of Physics and Collaborative Innovation Center of Advanced Microstructures Fudan University Shanghai China Department of Materials Science & Engineering the University of Texas at Dallas Richardson USA Beijing Key Lab of Microstructure and Property of Advanced Materials Institute of Microstructure and Properties of Advanced Materials Beijing University of Technology Beijing China Centre for Microscopy and Microanalysis University of Queensland Brisbane Australia WPI Advanced Institute for Materials Research Tohoku University Sendai Japan Quantum Materials Science and Technology Department International Iberian Nanotechnology Laboratory Braga Portugal

Identification of atomic disorders and their subsequent control has proven to be a key issue in predicting, understanding, and enhancing the properties of newly emerging topological insulator materials. Here, we demonstrate direct evidence of the cation antisites in single-crystal SnBi2Te4 nanoplates grown by chemical vapor deposition, through a combination of sub-angstr6m-resolution imaging, quantitative image simulations, and density functional theory calculations. The results of these combined techniques revealed a recognizable amount of cation antisites between Bi and Sn, and energetic calculations revealed that such cation antisites have a low formation energy. The impact of the cation antisites was also investigated by electronic structure calculations together with transport measurement. The topological surface properties of the nanoplates were further probed by angle-dependent magnetotransport, and from the results, we observed a two-dimensional weak antilocalization effect associated with surface carriers. Our approach provides a pathway to identify the antisite defects in ternary chalcogenides and the application potential of SnBi2Te4 nanostructures in next-generation electronic and spintronic devices.

关键词： metal chalcogenide antisite defect nanoplate scanning transmissionelectron microscop3~magnetotransport

A nanoresonant gold-aptamer probe for rapid and sensitive detection of thrombin

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Nuclear Science and Techniques 2012年第5期23卷 317-320页

作者： ZHENG Xiaoxue WEN Yanqin ZHANG Juan wang lihua SONG Shiping ZHANG Hua FAN Chunhai Shanghai Institute of Applied Physics Chinese Academy of Sciences Jiading Campus Shanghai 201800 China School of Materials Science and Engineering Nanyang Technological University 639798 Singapore

Resonance light scattering (RLS) is a sensitive technique for monitoring scattered light induced by extended aggregates of chromophores. It has been widely used to study aggregations for its simple manipulation, high sensitivity and great versatility. Gold nanoparticles generate colorful light-scattering signals due to their unique surface plasmon resonances, hence extraordinary light scattering upon aggregation. In this paper we report a rapid and sensitive method based on gold nanoparticles and DNA aptamer to detect protein biomarkers by RLS. Thiol modified thrombin aptamer was covalently assembled to the surface of gold nanoparticles as nanobio probes. As thrombin has two specific binding sites for its aptamer, it can bridge the well dispersed nanoparticles and lead to a network of particle aggregations. The formation of aggregation ia measured by RLS, and the specific detection of thrombin at nM level is achieved. The method has good specificity.

关键词：金纳米粒子特异性检测生物探针凝血酶灵敏度表面等离子共振适配体共振光散射

An Optimized-based Ion Etch Yield Modeling Method in Plasma Etching

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An Optimized-based Ion Etch Yield Modeling Method in Plasma ...

VO2·0.2H2O nanocuboids anchored onto graphene sheets as the cathode material for ultrahigh capacity aqueous zinc ion batteries

第25届中国控制与决策会议

作者： Hongjun Yang Yixu Song Shulin Zheng lihua wang Peifa Jia State Key Laboratory on Intelligent Technology and Systems Tsinghua National Laboratory for Information Science and Technology Chinese Department of Computer Science and Technology Tsinghua University Shenyang Artillery Academy

ISBN: (纸本)9781467355339

In order to study the physics mechanism of surface etching process in low pressure plasmas, we propose a method to optimize etching yield model, which combines optimization technology with surface evolution algorithm. In plasma etching process, the surface effect of the ions are controlled by etch yield which may be measured by the elaborate experiment. But measuring tool or instrument affect measuring result, which will lead to etch yield model’s inaccuracy. In order to avoid the problems caused by measuring method, we adopt optimization technology to calculate the etch yield model. By defining an error function between the actual etching profile and simulation profile, etch yield modeling problem is transformed into an optimization problem;Then we use the genetic algorithm and surface evolution algorithm to solve this problem. The experimental results illustrate that simulation profile using the etch yield model by this method is very similar with the actual etching profile in surface topography. It also proves that our proposed method is effective and can be used to model etch yield.

关键词： Etch yield Genetic algorithm Surface evolution algorithm Plasma etching

来源： cnki会议评论

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Nano Research 2020年第1期13卷 215-224页

作者： Dedong Jia Kun Zheng Ming Song Hua Tan Aitang Zhang lihua wang Lijun Yue Da Li Chenwei Li Jingquan Liu College of Material Science and Engineering Institute for Graphene Applied Technology InnovationSchool of Electromechanical EngineeringQingdao UniversityQingdao266071China College of Chemistry and Chemical Engineering Xuzhou University of TechnologyXuzhou221111China School of Physical and Mathematical Sciences Nanyang Technological UniversitySingapore637371Singapore

Aqueous Zinc-ion batteries(ZIBs),using zinc negative electrode and aqueous electrolyte,have attracted great attention in energy storage field due to the reliable safety and low-cost.A composite material comprised of VO2·0.2H2O nanocuboids anchored on graphene sheets(VOG)is synthesized through a facile and efficient microwave-assisted solvothermal strategy and is used as aqueous ZIBs cathode *** to the synergistic effects between the high conductivity of graphene sheets and the desirable structural features of VO2·0.2H2O nanocuboids,the VOG electrode has excellent electronic and ionic transport ability,resulting in superior Zn ions storage *** Zn/VOG system delivers ultrahigh specific capacity of 423 mAh·g^−1 at 0.25 A·g^−1 and exhibits good cycling stability of up to 1,000 cycles at 8 A·g^−1 with 87%capacity *** structural and elemental characterizations confirm that the interlayer space of VO2·0.2H2O nanocuboids can adapt to the reversible Zn ions insertion/*** as-prepared VOG composite is a promising cathode material with remarkable electrochemical performance for low-cost and safe aqueous rechargeable ZIBs.

关键词： VO2·0.2H2O nanocuboids graphene sheet aqueous zinc-ion battery ultrahigh capacity electron and ion transport

Synthesis and Characterization of Er^(3+)∶Y_(3)Al_(5)O_(12) Nanocrystalline Powders Prepared by Sol-Gel Method

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Journal of Rare Earths 2006年第1期24卷 125-127页

作者： Li Zhanfa Yuan Duorong Duan Xiulan Shi Xuzhong Song Jian'an wang lihua State Key Laboratory of Crystal Materials Shandong UniversityJinan 250100China

Nano-sized Er^(3+)∶Y_(3)Al_(5)O_(12)powders was successfully prepared via a simple sol-gel route at as low a temperature at 800℃whereas a temperature much higher is necessary to obtain this compound by solid state synthesis(about 1500℃).The phase purity,composition and microstructural features of the materials were analyzed by means of X-ray diffraction(XRD),infrared spectroscopy(IR)and transmission electron microscopy(TEM),and no other intermediate phase were observed to form in the range of 700~1000℃.The luminescence spectra of Er^(3+)substituted for Y^(3+)in YAG in 1%content was characterized on samples at different temperature.

关键词： preparation YAG nanocrystalline powders sol-gel method

Association of microRNA polymorphisms with the risk of head and neck squamous cell carcinoma in a Chinese population:a case-control study

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Chinese Journal of Cancer 2016年第11期35卷 596-603页

作者： Limin Miao lihua wang Longbiao Zhu Jiangbo Du Xun Zhu Yuming Niu Ruixia wang Zhibin Hu Ning Chen Hongbing Shen Hongxia Ma Jiangsu Key Laboratory of Oral Diseases Nanjing Medical University Department of Epidemiology and Biostatistics School of Public HealthNanjing Medical University Department of Stomatology and Center for Evidence-Based Medicine and Clinical Research Taihe HospitalHubei University of Medicine Jiangsu Key Lab of Cancer Biomarkers Prevention and TreatmentCollaborative Innovation Center for Cancer Personalized MedicineNanjing Medical University

Background:MicroRNA(miRNA) polymorphisms may alter miRNA-related processes,and they likely contribute to cancer *** studies have investigated the associations between genetic variants in several key miRNAs and the risk of human cancers;however,few studies have focused on head and neck squamous cell carcinoma(HNSCC) *** study aimed to evaluate the associations between several key miRNA polymorphisms and HNSCC risk in a Chinese ***:In this study,we genotyped five common single-nucleotide polymorphisms(SNPs) in several key miRNAs(miR-149 rs2292832,miR-146 a rs2910164,miR-605 rs2043556,miR-608 rs4919510,and miR-196a2 rs11614913) and evaluated the associations between these SNPs and HNSCC risk according to cancer site with a case-control study including 576 cases and 1552 controls,which were matched by age and sex in a Chinese ***:The results revealed that miR-605 rs2043556[dominant model:adjusted odds ratio(OR) 0.71,95%confidence interval(CI) 0.58-0.88;additive model:adjusted OR 0.74,95%CI 0.62-0.89]and miR-196a2 rs11614913(dominant model:adjusted OR 1.36,95%C11.08-1.72;additive model:adjusted OR 1.28,95%C11.10-1.48) were significantly associated with the risk of oral squamous cell carcinoma(OSCC).Furthermore,when these two loci were evaluated together based on the number of putative risk alleles(rs2043556 A and rs11614913 G),a significant locus-dosage effect was noted on the risk of OSCC(P_(trend) < 0.001).However,no significant association was detected between the other three SNPs(miR-149 rs2292832,miR- 146 a rs2910164,and miR-608 rs4919510) and HNSCC ***:Our study provided the evidence that miR-605 rs2043556 and miR-196a2 rs11614913 may have an impact on genetic susceptibility to OSCC in Chinese population.

关键词： Head and neck cancer microRNA Polymorphism Squamous cell carcinoma Susceptibility