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波纹状银纳米线的制备及其SERS性能研究

化学学报 2014年第4期72卷 467-472页

作者：陈旭成赵爱武高倩甘自保陶文玉中国科学技术大学化学系合肥230026 中国科学院合肥智能机械研究所合肥230031 传感技术联合国家重点实验室合肥230031

首先通过传统的多元醇方法合成了表面光滑的银纳米线,然后利用Fe(NO3)3作为刻蚀剂在室温条件下对合成的银纳米线进行刻蚀得到了具有波纹状表面的银纳米线.通过扫描电镜(SEM)分析表明:银纳米线的表面粗糙程度随着刻蚀剂量的增加而增加,... 详细信息

首先通过传统的多元醇方法合成了表面光滑的银纳米线,然后利用Fe(NO3)3作为刻蚀剂在室温条件下对合成的银纳米线进行刻蚀得到了具有波纹状表面的银纳米线.通过扫描电镜(SEM)分析表明:银纳米线的表面粗糙程度随着刻蚀剂量的增加而增加,但过量的刻蚀剂又会导致纳米线的断裂甚至形成球状颗粒;当刻蚀剂的量为100μL时,获得了波纹状表面的银纳米线.对结晶紫(CV)的表面增强拉曼光谱(SERS)结果表明,这种波纹状银纳米线的拉曼信号强度比表面光滑的银纳米线提高了约5倍,其检测限可低至10-10 mol/L.此外,这种优势还可以延伸到敏感性检测10-9mol/L的对巯基吡啶(4-Mpy)分子,可以作为一种普适、有效的SERS活性基底.

关键词：银纳米线 Fe(NO3)3 波纹状银纳米线 CV 4-Mpy SERS

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第四种晶相最密排列方式

中国科学基金 2017年第5期31卷 461-465页

作者：甘自保夏楠伍志鲲中国科学院固体物理研究所中国科学院材料物理重点实验室中国科学院纳米科学卓越中心安徽省纳米材料与技术重点实验室合肥230031

迄今为止,在晶体中共发现了三种最密排列方式。金属纳米团簇研究的兴起,为发现新的晶相排列提供了契机,这是因为金属纳米团簇粒子具有亚纳米尺寸和组成结构的多样性。近年来,我们在研究金属纳米团簇内部结构的基础上,开展了金属纳米团... 详细信息

迄今为止,在晶体中共发现了三种最密排列方式。金属纳米团簇研究的兴起,为发现新的晶相排列提供了契机,这是因为金属纳米团簇粒子具有亚纳米尺寸和组成结构的多样性。近年来,我们在研究金属纳米团簇内部结构的基础上,开展了金属纳米团簇的外部结构(晶相排列)研究,继在Au_(92)团簇中发现4H最密排列后,最近合成了一个新的团簇Au_(60),并在它的晶体结构中发现了一种独特的晶相最密排列方式6HLH,这是继1979年第三种晶相最密排列方式发现后的一种新的最密排列方式。6HLH排列导致Au_(60)固态荧光的显著衰减。另外,我们在这种团簇的结构中发现了6个四面体配位的μ4-S和一对巨型Au20S3(SCH2Ph)18长钉。我们的工作不仅对金属纳米团簇研究,而且对晶相排列的研究具有重要的启发意义。

关键词：金纳米团簇晶相排列光致发光

Recent Strategies and Advances in Hydrogel-Based Delivery Platforms for Bone Regeneration

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NANO-MICRO LETTERS 2025年第1期17卷 1-51页

作者： Wang, Xiao Zeng, Jia gan, Donglin Ling, Kun He, Mingfang Li, Jianshu Lu, Yongping Guangyuan Cent Hosp Sci & Technol Innovat Ctr Biomed Mat & Clin Res Guangyuan Key Lab Multifunct Med Hydrogel Guangyuan 628000 Peoples R China Nanjing Normal Univ Jiangsu Collaborat Innovat Ctr Biomed Funct Mat Sch Chem & Mat Sci Jiangsu Key Lab Biofunct Mat Nanjing 210023 Peoples R China Sichuan Univ Coll Polymer Sci & Engn State Key Lab Polymer Mat Engn Chengdu 610065 Peoples R China

Recent advances in the combined delivery platform that integrate nano-/microscale carriers and with 3D hydrogel network for bone regeneration are *** strategies for bioactive molecules delivery involving nanoparticles, nanosheets, and microspheres, along with extra stimuli such as near-infrared light, temperature changes, ultrasonication, and inflammatory conditions, are *** prospects and challenges for the clinical translation and the development of nano-/microscale incorporated hydrogel-based delivery platform are discussed. Bioactive molecules have shown great promise for effectively regulating various bone formation processes, rendering them attractive therapeutics for bone regeneration. However, the widespread application of bioactive molecules is limited by their low accumulation and short half-lives in vivo. Hydrogels have emerged as ideal carriers to address these challenges, offering the potential to prolong retention times at lesion sites, extend half-lives in vivo and mitigate side effects, avoid burst release, and promote adsorption under physiological conditions. This review systematically summarizes the recent advances in the development of bioactive molecule-loaded hydrogels for bone regeneration, encompassing applications in cranial defect repair, femoral defect repair, periodontal bone regeneration, and bone regeneration with underlying diseases. Additionally, this review discusses the current strategies aimed at improving the release profiles of bioactive molecules through stimuli-responsive delivery, carrier-assisted delivery, and sequential delivery. Finally, this review elucidates the existing challenges and future directions of hydrogel encapsulated bioactive molecules in the field of bone regeneration.

关键词： Hydrogel Bone regeneration Bioactive molecules Drug delivery Nano-/microscale carriers

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通过赝反伽伐尼反应实现金纳米粒子模块替换

化学学报 2020年第5期78卷 407-411页

作者：金凤鸣董宏伟赵燕庄胜利廖玲文闫楠古万苗查珺袁金云李进邓海腾甘自保杨金龙伍志鲲中国科学院固体物理研究所中国科学院材料物理重点实验室安徽省纳米材料与技术重点实验室中国科学院纳米卓越中心合肥230031 中国科学技术大学合肥230026 安徽大学物质科学与信息技术研究院合肥230601 中国科学技术大学合肥微尺度物质科学国家研究中心合肥230026 清华大学生命科学学院清华大学-北京大学生命科学联合中心北京100084 清华大学生命科学学院生物信息学教育部重点实验室北京100084

通过可控的方式精确调控纳米粒子的结构仍是一个富有挑战性和鼓舞人心的课题.尽管单原子或两、三个金属原子的精细调控已经在金纳米粒子中实现,涉及三个以上金属原子的取代(模块取代)还没有报道.本工作报道了环己硫醇配体保护的Au_(48)(... 详细信息

通过可控的方式精确调控纳米粒子的结构仍是一个富有挑战性和鼓舞人心的课题.尽管单原子或两、三个金属原子的精细调控已经在金纳米粒子中实现,涉及三个以上金属原子的取代(模块取代)还没有报道.本工作报道了环己硫醇配体保护的Au_(48)(CHT)_(26)的合成及其通过赝反伽伐尼过程的模块取代.单晶结构揭示模块取代的产物与母体团簇共用一个相似的Au_(31)(CHT)_(12)主体,但剩余部分不同(Au_6(CHT)_(11)***_(16)(CHT)_(14)).一个有趣的发现是模块取代抑制了Au_(48)(CHT)_(26)的光热过程,却增强了它的发射,赋予了所合成团簇更好的双(多)功能应用潜力.光热效应的减弱和发射的增强也暗示了这两种作用能够彼此至少部分转化,对于研究这两种效应之间的相互影响也具有重要的启示.

关键词：金纳米团簇模块替换赝反伽伐尼反应光热效应荧光

Mechanism of Bragg Diffraction-Assisted Light Extraction in gan-based Light-Emitting Diodes Based on a Self-Consistent Model

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Communications in Theoretical Physics 2009年第9期52卷 545-548页

作者： LIU Wen-De gan Zi-Zhao National Institute of Metrology Beijing 100013 China School of Physics and State Key Laboratory for Artificial Microstructures and Mesoscopic Physics Peking University Beijing 100871 China

By introducing the distribution of the light energy density in gan-based light-emitting diode (LED),theLED model based on the incoherent regime and the light extraction efficiency are *** energy density asa function of the angle of incidence is calculated to demonstrate the mechanism of the light *** deviationbetween the tendencies of the transmissivity of the output layer and the extraction efficiency is also demonstrated.

关键词： light-emitting diodes extraction efficiency Bragg diffraction photonic crystals

Low limit of detection of the Algan/gan-based sensor by the Kelvin connection detection technique

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Microsystems & Nanoengineering 2021年第4期7卷 35-44页

作者： Hanyuan Zhang Ying gan Shu Yang Kuang Sheng Ping Wang College of Electrical Engineering Zhejiang University310027 HangzhouChina Biosensor National Special Laboratory Department of Biomedical EngineeringZhejiang University310027 HangzhouChina Hangzhou Global Scientific and Technological Innovation Center Zhejiang University310027 HangzhouChina

The Algan/gan-based sensor is a promising POCT(point-of-care-testing)device featuring miniaturization,low cost,and high *** is an effective protein biomarker for the early diagnosis of HF(heart failure).In this work,a novel Algan/gan device with the Kelvin connection structure and the corresponding detection technique was *** technique can effectively suppress the background noise and improve the SNR(signal-to-noise ratio).A BNP detection experiment was carried out to verify the effectiveness of this *** is shown that compared with that of the traditional detection method,the LOD(limit of detection)was improved from 0.47 ng/mL to 1.29 pg/*** BNP detection experiment was also carried out with a traditional electrochemical Au-electrode sensor with the same surface functionalization *** Algan/gan sensor showed a better LOD than the Au-electrode ***,the influence of Algan/gan sensor package on background noise was investigated with the mechanism of the noise source ***,based on the optimized package,the optimal SNR quiescent operating point of the Algan/gan sensor was *** biasing the sensor at the optimal quiescent operating point and immobilizing the magnetic beads with anti-BNP on the gate of the Algan/gan sensor,the LOD for BNP detection was further improved to 0.097 pg/mL.

关键词： Algan/gan limit noise

Correlate light-matter interactions in different spectral regimes

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Light(Science & Applications) 2022年第4期11卷 455-456页

作者： Qiaoqiang gan Material Science Engineering Physical Science EngineeringKing Abdullah University of Science and TechnologyThuwalSaudi Arabia Electrical Engineering University at BuffaloThe State University of New YorkBuffaloNYUSA

Using mid-infrared plasmons to trigger visible surface enhanced Raman spectroscopy signals within a nanocavity represents new opportunities for fundamental investigation of light-matter interaction within quantum regimes,requiring improved sensing capabilities enabled by well-designed nano/microstructures and characterization systems.

关键词： light cavity visible

EXACT AND DISCRETIZED DISSIPATIVITY OF THE PANTOGRAPH EQUATION

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Journal of Computational Mathematics 2007年第1期25卷 81-88页

作者： Siqing gan School of Mathematical Sciences and Computing Technology Central South University Changsha 410075 China

The analytic and discretized dissipativity of nonlinear infinite-delay systems of the form x＇（t） = g（x（t）,x（qt））（q∈ （0, 1）, t 〉 0） is investigated. A sufficient condition is presented to ensure that the above nonlinear system is dissipative. It is proved the backward Euler method inherits the dissipativity of the underlying system. Numerical examples are given to confirm the theoretical results.

关键词： Infinite delay Pantograph equation Backward Euler method Dissipativity.

Dynamic crossover in [VIO^(2+)][Tf_(2)N-]_(2) ionic liquid

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Chinese Physics B 2021年第1期30卷 374-379页

作者： gan Ren Departments of Physics&Key Laboratory of Photonic and Optical Detection in Civil Aviation Civil Aviation Flight University of ChinaGuanghan 618307China

Ionic liquids usually behave as fragile liquids,and the temperature dependence of their dynamic properties obeys supper-Arrhenius *** this work,a dynamic crossover is observed in([VIO^(2+)][Tf_(2)N-]_(2)) ionic liquid at the temperature of 240-800 *** diffusion coefficient does not obey a single Arrhenius law or a Vogel-Fulcher-Tammann(VFT) relation,but can be well fitted by three Arrhenius laws or a combination of a VFT relation and an Arrhenius *** origin of the dynamic crossover is analyzed from correlation,structure,and *** gets a stronger backward correlation at a lower temperature,as shown by the fractal dimension of the random *** temperature dependence function of fractal dimension,heterogeneity order parameter,and thermodynamic data can be separated into three regions similar to that observed in the diffusion *** two crossover temperatures observed in the three types of data are almost the same as that in diffusion coefficient fitted by three Arrhenius *** results indicate that the dynamic crossover of[VIO2+][Tf2 N-]2 is attributed to the heterogeneous structure when it undergoes cooling.

关键词： ionic liquids dynamic crossover heterogeneity order parameter fractal dimension fragile