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Engineering the inter-island plasmonic coupling in homometallic Au-Au_(n)core-satellite structures

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Nano Research 2023年第7期16卷 10690-10697页

作者： Xiaoying Wu Xiaoli Tian Zihe Jiang Yun Wang Tingting Jiang yuhua feng Zhenglong Zhang Hongyu Chen Institute of Advanced Synthesis School of Chemistry and Molecular EngineeringNanjing Tech UniversityNanjing 211816China School of Science Westlake UniversityHangzhou 310024China School of Physics and Information Technology Shaanxi Normal UniversityXi’an 710062China

We show that through strong ligand mediated interfacial energy control between Au seeds and the deposited Au,the non-wetting growth of Au on Au seeds led to the formation homometallic core-satellite nanostructures.To modulate the intraparticle plasmonic coupling between the core and the satellites,the number and size of the Au satellites,and their inter-island distances were continuously tuned by varying the growth kinetics.As a result of the precise structural control,the plasmonic absorptions of the core-satellite nanostructures were tuned from visible to near-infrared(NIR)spectral range,and the extent of spectral modulation(500-1300 nm)is among the best of the literature methods.This synthetic advance enriches the toolbox for nanosynthesis and points to a new direction in the exploration of sophisticated functional designs.

关键词： Au heterostructure core-satellite localized surface plasmon resonance(LSPRs) intraparticle coupling strong ligand near-infrared(NIR)absorptions

Turning weak into strong: on the CTAB-induced active surface growth

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Science China Chemistry 2022年第7期65卷 1299-1305页

作者： Yonglong Zheng Jianpeng Zong Ting Xiang Quan Ren Dongmeng Su yuhua feng Yawen Wang Hongyu Chen Institute of Advanced Synthesis(IAS) School of Chemistry and Molecular EngineeringJiangsu National Synergetic Innovation Centre for Advanced MaterialsNanjing Tech UniversityNanjing 211816China School of Science Westlake UniversityHangzhou 310023China

Discovering new methods and principles in the inequivalent growth of equivalent facets is of great significance for going beyond symmetrical nanocrystals and for out-of-box exploration. In this work, we demonstrate that a middle ground exists between the traditional weak ligands and the strong ligands with unusual growth modes. By modifying the seed concentration during the growth of pentagonal Au nanorods, the typical weak ligand cetyltrimethylammonium bromide(CTAB) is made strong, leading to notches of restricted growth and even the active surface growth mode. In-depth investigation in the link between growth kinetics and ligand packing reveals the principle of their interplay —— that the on-off dynamics of the ligands only allows for a certain limit of materials deposition rate. Beyond this limit, the growth materials build up and are then diverted elsewhere, leading to inequivalent growth. The fact that a freshly grown surface has few ligands promotes the active surface growth, focusing the growth materials onto a few sites. We believe that the knowhow of interfering ligand packing via growth kinetics would offer a powerful tool of synthetic control, where the facet-and curvature-dependent ligand packing is expected to be useful synthetic handles.

关键词： facet control ligand packing active surface growth Au deposition ligand dissociation

Combining the Curvature and Ligand Effects for Regioselective Growth on Au Nano-bipyramids

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Precision Chemistry

Precision Chemistry 2023年第2期1卷 94-99页

作者： Tingting Jiang Jianpeng Zong yuhua feng Hongyu Chen Institute of Advanced Synthesis School of Chemistry and Molecular EngineeringNanjing Tech UniversityNanjing 211816 Jiangsu ProvinceChina

We demonstrate the regioselective growth of Au on Au nanobipyramids,either with etching of the tips,uniform coating except the tips,or forming a single island on the axial tip or an island on the equatorial corner.Importantly,the regioselectivity not only arises from the local curvature,as suggested by the recent literature,but also critically depends on the extent of ligand coverage on the seed surface.It is important to consider the competitive growth together with the curvature−ligand interplay:when there are insufficient ligands,they bind preferentially to the sharp tip for high surface energy,so that the remaining growth materials are diverted elsewhere;when the bipyramid is fully covered by ligands,the growth then selectively occurs at the tips because of the larger gaps among the ligands there.Our results demonstrate the great potentials in the rational design and synthesis when constructing sophisticated hybrid structures for functional nanomaterials.

关键词： Curvature effect Ligand effect Regioselective growth Seeded growth Ligand coverage

Highly ordered Janus CdS-Au-TiOZ-scheme structure with high efficiency in photocatalysis

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Science China Chemistry 2023年

作者： Ruixue Xiao Jie Zhang Tingting Jiang Yefan Zhou Yun Wang Wenjia Xu yuhua feng School of Physical and Mathematical Science Nanjing Tech University Institute of Advanced Synthesis School of Chemistry and Molecular Engineering Nanjing Tech University

Precise structural control had attracted tremendous interest in nanosynthesis due to its great importance in tailoring the physical properties of nanomaterials.Here we report the synthesis of highly ordered CdS-Au-TiO2ternary Janus structure via templateprotected sequential growth and conversion method.Arising from the integration of the rectification effect of Au-CdS and AuTiO2Schottky barriers,the Janus configuration of the CdS-TiO2domains,the plasmonic effect of Au nanosphere,and the Z-scheme charge transportation,the CdS-Au-TiO2Janus structure showed high efficiency in the model photocatalytic degradation of methyl orange (MO) dye.Importantly,the well-defined structural order allowed the identification of the correlation between the structure and the catalytic performance.We believe that the synthetic control and the mechanism insights would help the design and synthesis of sophisticated nanostructures,and would eventually promote their applications in photocatalysis fields.

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前交叉韧带在保膝治疗中应用的研究进展

中华解剖与临床杂志 2024年第5期29卷 348-352页

作者：冯宇华杨家驹张民山西医科大学第二医院骨科太原030001

目的总结前交叉韧带(ACL)的解剖功能状态、功能缺陷预测,以及ACL在膝关节骨关节炎(OA)膝关节单髁置换术(UKA)和胫骨高位截骨术(HTO)中应用的研究进展。方法在中国知网、中华医学期刊网、PubMed等数据库中,分别以“骨关节炎”“膝关节单... 详细信息

目的总结前交叉韧带(ACL)的解剖功能状态、功能缺陷预测,以及ACL在膝关节骨关节炎(OA)膝关节单髁置换术(UKA)和胫骨高位截骨术(HTO)中应用的研究进展。方法在中国知网、中华医学期刊网、PubMed等数据库中,分别以“骨关节炎”“膝关节单髁置换术”“胫骨高位截骨术”“前交叉韧带”和“osteoarthritis”“unicompartmental knee arthroplasty”“high tibial osteotomy”“anterior cruciate ligament”等为中、英文关键词,检索2023年8月之前公开发表的、有关ACL的解剖功能及ACL在膝关节OA保膝治疗中应用的研究文献,共检索到453篇,剔除研究设计存在缺陷、内容不符、质量低、证据等级不高、无法获取全文的文献,最终纳入37篇,其中中文文献2篇、英文文献35篇,进行分析总结。结果ACL在膝关节运动学和稳定性方面都有着重要作用。膝关节OA患者存在ACL功能缺陷,但能够代偿膝关节前后不稳;当存在膝关节旋转不稳时,建议患者接受ACL翻修或重建手术。临床可在膝关节X线片上测量胫骨后倾角、胫股关节冠状半脱位、髋-膝-踝角、胫骨近端最大磨损点百分比等放射学指标来评估ACL的功能状态,进而更好地进行术前计划。ACL功能缺陷并不总是HTO或UKA的禁忌证。在伴有ACL功能缺陷的膝关节重度OA患者中,对于年轻的、有运动需要或活动要求高的患者,可以选择UKA联合ACL重建方案治疗;而对于年龄较大(>65岁)、膝关节无旋转不稳定、对活动要求不高的患者,可以选择UKA方案治疗。对于膝关节内侧轻、中度OA年轻患者,可选择HTO治疗方案;而对伴有ACL功能缺陷、运动要求高的膝关节OA患者,可选择HTO联合ACL重建方案治疗。结论ACL功能缺陷不一定是UKA或者HTO的禁忌证。对伴有ACL功能缺陷的膝关节OA患者,需要综合患者的年龄、运动需求、膝关节稳定性,以及疾病严重程度等情况,为患者选择合适的、个体化的治疗方案。

关键词：骨关节炎,膝前交叉韧带保膝手术单髁置换术膝关节胫骨高位截骨术

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急性缺血性脑卒中损伤机制及其治疗研究进展

吉林医药学院学报 2024年第2期45卷 140-143页

作者：冯玉华吉林医院学院附属医院吉林吉林132013

随着医学科技水平的发展和人口老龄化进程的加快,我国老年人口数量逐年攀升。随着人年龄的增长,身体各项机能也随之减退,患上心脑血管疾病的概率也随之增高。其中缺血性脑卒中是一种脑血管常见疾病,有着高患病率、高致残率和高死亡率的... 详细信息

随着医学科技水平的发展和人口老龄化进程的加快,我国老年人口数量逐年攀升。随着人年龄的增长,身体各项机能也随之减退,患上心脑血管疾病的概率也随之增高。其中缺血性脑卒中是一种脑血管常见疾病,有着高患病率、高致残率和高死亡率的特点,其致死率位居各种死因首位,对人的身心健康和生活质量造成极大的影响。本文主要综述缺血性脑卒中临床治疗的研究进展,以期为临床治疗提供参考。

关键词：缺血性脑卒中临床治疗研究进展

Versatile optical manipulation of trions,dark excitons and biexcitons through contrasting exciton-photon coupling

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Light(Science & Applications) 2023年第12期12卷 2802-2810页

作者： Zhe Li Xin-Yuan Zhang Rundong Ma Tong Fu Yan Zeng Chong Hu Yufeng Cheng Cheng Wang Yun Wang yuhua feng Takashi Taniguchi Kenji Watanabe Ti Wang Xiaoze Liu Hongxing Xu School of Physics and Technology Center for Nanoscience and Nanotechnologyand Key Laboratory of Artificial Micro-and Nanostructures of Ministry of EducationWuhan University430072 WuhanChina Wuhan University Shenzhen Research Institute 518057 ShenzhenChina Institute of Advanced Synthesis School of Chemistry and Molecular EngineeringNanjing Tech University211816 NanjingChina International Center for Materials Nanoarchitectonics National Institute for Materials Science1-1 Namiki305-0044 TsukubaJapan Research Center for Functional Materials National Institute for Materials Science1-1 Namiki305-0044 TsukubaJapan Wuhan Institute of Quantum Technology 430206 WuhanChina School of Microelectronics Wuhan University430072 WuhanChina Henan Academy of Sciences 450046 ZhengzhouChina

Various exciton species in transition metal dichalcogenides(TMDs),such as neutral excitons,trions(charged excitons),dark excitons,and biexcitons,have been individually discovered with distinct light-matter interactions.In terms of valley-spin locked band structures and electron-hole configurations,these exciton species demonstrate flexible control of emission light with degrees of freedom(DOFs)such as intensity,polarization,frequency,and dynamics.However,it remains elusive to fully manipulate different exciton species on demand for practical photonic applications.Here,we investigate the contrasting light-matter interactions to control multiple DOFs of emission light in a hybrid monolayer WSe2-Ag nanowire(NW)structure by taking advantage of various exciton species.These excitons,including trions,dark excitons,and biexcitons,are found to couple independently with propagating surface plasmon polaritons(SPPs)of Ag NW in quite different ways,thanks to the orientations of transition dipoles.Consistent with the simulations,the dark excitons and dark trions show extremely high coupling efficiency with SPPs,while the trions demonstrate directional chiral-coupling features.This study presents a crucial step towards the ultimate goal of exploiting the comprehensive spectrum of TMD excitons for optical information processing and quantum optics.

关键词： dynamics coupling optics

激素治疗慢性肾脏病进展高风险IgA肾病患者的预后分析——一项回顾性研究

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中国全科医学 2024年第6期27卷 692-698页

作者：高歌张鑫越冯玉华窦婧予吴雪莹程根阳郑州大学第一附属医院肾脏内科河南省郑州市450052

背景IgA肾病(IgAN)是世界范围内常见的原发性肾小球肾炎之一,目前糖皮质激素是否能改善慢性肾脏病(CKD)进展高风险IgAN患者肾脏预后尚无明确结论。目的本研究旨在探讨激素治疗对CKD进展高风险IgAN患者的治疗反应及肾脏预后的影响。方法... 详细信息

背景IgA肾病(IgAN)是世界范围内常见的原发性肾小球肾炎之一,目前糖皮质激素是否能改善慢性肾脏病(CKD)进展高风险IgAN患者肾脏预后尚无明确结论。目的本研究旨在探讨激素治疗对CKD进展高风险IgAN患者的治疗反应及肾脏预后的影响。方法回顾性纳入2017年1月—2021年10月于郑州大学第一附属医院就诊的CKD进展高风险IgAN患者。根据是否进行激素治疗将患者分为激素治疗组和支持治疗组,采用倾向匹配法按照性别、年龄、24 h尿蛋白定量、估算肾小球滤过率(eGFR)对患者进行1∶1匹配筛选病例,收集患者的临床及病理资料,记录患者治疗1年内疾病缓解情况及不良反应发生情况。以开始支持治疗的日期作为随访起点,随访至2022-10-31,主要终点事件定义为:进展为终末期肾脏病(ESRD)或接受透析治疗。复合终点事件定义为:eGFR较基线持续下降超过30%或进入ESRD或接受透析或患者死亡;运用Kaplan-Meier法绘制生存曲线,并采用Log-rank检验比较两组患者主要/复合终点事件累积发生率的差异。运用Cox比例风险回归分析探究影响CKD进展高风险IgAN患者预后的可能因素。结果共有236例原发性IgAN患者符合纳入标准,经过1∶1匹配,激素治疗组97例与支持治疗组97患者匹配成功,两组基线数据匹配均衡。激素治疗组患者完全缓解率、部分缓解率均高于支持治疗组(χ^(2)=6.171,P=0.013;χ^(2)=3.973,P=0.046)。中位随访时间为18.00(9.75,28.00)个月。Kaplan-Meier生存分析结果显示,激素治疗组的主要终点事件累积发生率低于支持治疗组(χ^(2)=4.495,P=0.034);激素治疗组的复合终点事件累积发生率低于支持治疗组(χ^(2)=4.419,P=0.036)。符合纳入标准的236例患者中有177例中等量蛋白尿患者,采用倾向匹配法按照性别、年龄、24 h尿蛋白定量、eGFR对激素治疗和支持治疗的177例患者进行1∶1匹配后,激素治疗中等量蛋白尿者和支持治疗中等量蛋白尿者各有76例患者匹配成功。Kaplan-Meier生存曲线结果显示,激素治疗中等量蛋白尿者的主要终点事件累积发生率低于支持治疗中等量蛋白尿者(χ^(2)=4.127,P=0.042);激素治疗中等量蛋白尿者的复合终点事件累积发生率低于支持治疗中等量蛋白尿者(χ^(2)=4.934,P=0.026)。多因素Cox比例风险回归分析结果显示血红蛋白(HR=0.982)、血肌酐(HR=1.019)、eGFR(HR=1.020)、24 h尿蛋白定量(HR=1.205)是影响CKD进展高风险IgAN患者发生主要终点事件的影响因素(P<0.05)。激素治疗组感染发生率高于支持治疗组(P<0.05)。结论在CKD进展高风险IgAN肾病患者中,与单纯支持治疗相比,激素治疗可以显著提升肾脏缓解率,降低肾功能下降、肾衰竭风;但仍需警惕其不良反应的发生。

关键词：肾小球肾炎,IgA 糖皮质激素类蛋白尿预后危险因素比例风险度模型

基于CiteSpace的方剂学教学改革动态与热点可视化分析

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中国中医药现代远程教育 2024年第12期22卷 23-26页

作者：高丽魏楠楠李茹超冯玉华李津山西中医药大学中药方剂教研室山西晋中030619

目的运用CiteSpace研究并分析方剂学教学改革的动态和热点,从而把握其发展趋势和方向,为以后方剂学的教学改革发展提供思路。方法在中国知网(CNKI)上筛选方剂学教学改革的相关文章,使用CiteSpace软件绘制其关键词共现、时间聚类和突发... 详细信息

目的运用CiteSpace研究并分析方剂学教学改革的动态和热点,从而把握其发展趋势和方向,为以后方剂学的教学改革发展提供思路。方法在中国知网(CNKI)上筛选方剂学教学改革的相关文章,使用CiteSpace软件绘制其关键词共现、时间聚类和突发检测图谱,进行可视化分析。结果对相关文献的分析发现,方剂学教学改革已形成多个研究热点,主要集中在教学方法、教学质量、课程思政、教学模式等方面。其发展演变是一个长期而连续的过程,在之后的研究中,教学质量、课程思政等主题将是方剂学教学改革未来的发展趋势。结论近些年,方剂学教学改革的相关研究不断增多,研究方向不断拓展,研究程度逐渐深入,同时与社会需求协同发展,很大程度上促进了教学模式的转变,提高了教学质量。

关键词：方剂学教学改革 CiteSpace 教学模式教学方法