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Impact of nanocrystallinity segregation on the growth and morphology of nanocrystal superlattices

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Nano Research 2013年第8期6卷 611-618页

作者： yanfen wan Herve Portals Nicolas Goubet Alain Mermet Marie-Paule Pileni Université Pierre et Marie Curie Paris 6 UMR 7070 LM2N 8P 52 4 place Jussieu 75005 Paris France Centre National de la Recherche Scientifique Unitd Mixte de Recherche 7070 LM2N 4 place Jussieu 75005 Paris France Université Lyon I Institut Lumiére Matiére Unité Mixte de Recherche 5306 CNRS Bāt. A. Kastler 10 rueAda Byron 69622 Villeurbanne France

5 nm Au tetradecanethiol 涂的 nanoparticles 的一个胶体的答案被综合。在一落下的快蒸发以后，订了两个都由单个领域组成的单层，多晶的 nanocrystals 被获得。在增加材料和蒸发时间的数量以后，有不规则的轮廓的 nanocrystal 电影... 详细信息

5 nm Au tetradecanethiol 涂的 nanoparticles 的一个胶体的答案被综合。在一落下的快蒸发以后，订了两个都由单个领域组成的单层，多晶的 nanocrystals 被获得。在增加材料和蒸发时间的数量以后，有不规则的轮廓的 nanocrystal 电影和展出截断有四面的形状的拥挤不堪的 3D 超点阵被生产。用散布光谱学和电子显微镜学的低频率的 micro-Raman，积木 nanocrystallinity 被描绘。自发的 nanocrystallinity 分离被揭示：当 supracrystalline 电影由单个领域和多晶的 nanocrystals 的混合物组成时，截断有四面的 supracrystals 被显示主要包含单个领域积木。这观察指出在涉及 nanocrystal 超点阵和他们的形态学的生长的 nanocrystallinity 分离之间的关联。

关键词：纳米晶体超晶格结晶分离形态生长纳米结晶拉曼散射光谱晶体薄膜

Multi-3D hierarchical biomass-based carbon particles absorber for solar desalination and thermoelectric power generator

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Journal of Materials Science & Technology 2020年第24期59卷 180-188页

作者： Hao Jiang Xuemin Geng Simin Li Hongyu Tu Jiliang wang Lixia Bao Peng Yang yanfen wan School of Materials and Energy Key Laboratory of LCR Materials and Devices of Yunnan ProvinceYunnan UniversityKunming 650091China School of Chemical Science and Technology Yunnan UniversityKunming 650091China

To meet challenges of the global energy crisis and the freshwater resources shortage,the interfacial solarto-steam conversion(ISSC)system was developed quickly in recent years.The photothermal materials play an important role in the ISSC system.We are devoted to developing a unique photothermal material integrating multiple 3 D design philosophy both at macroscopic and microscopic levels by employing the cost-effective and widespread resources like straw,rose and coffee grounds,for carbonization as solar absorbers.The biomass-based carbonized particles(CPs)possess three major advantages:(1)wide sizedistribution is accessible to form 3 D porous rough surface of absorber layer to enhance ability of light absorption;(2)the pristine hierarchical microstructure could absorb nearly all the incident light;(3)the intrinsic vascular bundles with pores on their lumen walls provide a rapid and omnidirectional transport for water and steam escape.A high-efficient solar steam device was fabricated based on the absorber material with its internal 3 D micro textures and external 3 D architectures.Under the illumination of 1 sun,the photothermal conversion efficiency of straw,rose and coffee CPs can reach 93.4%,92.8% and 76%,respectively.Simultaneously,a high-efficient solar thermoelectric generator(STEG)is made by coating CPs on a commercial thermoelectric generator and the maximum power of STEG can reach 538.0μW.Such scalable biomass-based photothermal materials and high-grade thermoelectric conversion capability could be applied to the water purification and the electricity production.

关键词： Interfacial solar-to-steam conversion Biomass carbon particles 3D porous absorber Omnidirectional water transport Steam escape

Simultaneous acquisition of Fe3O4 monocrystals:Tunable magnetic properties with various morphologies

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Progress in Natural Science:Materials International 2020年第1期30卷 41-46页

作者： Zemin Zheng Yiming Cao Zhe Li Huiyong Li Dafeng Hu Hao Jiang Xuemin Geng Jiangwei Lu Xudong Zhang Peng Yang yanfen wan School of Materials Science and Engineering Yunnan Key Laboratory for Micro/nano Materials & TechnologyYunnan University Center for Magnetic Materials and Devices & Key Laboratory for Advanced Functional and Low Dimensional Materials of Yunnan Higher Education Institute Qujing Normal University

Fe3O4nanoparticles(NPs) with a face-centered cubic(fcc) structure and two different morphologies(nanospheres and nanoprisms) were synthesized by a facile one-step method.The synthesized Fe3O4nanospheres and nanoprisms were monocrystalline and separable in a magnetic field.In different volume ratios of oleylamine(OAm) to dibenzyl ether,the sizes of the prepared Fe3O4NPs ranged from 5 to 21 nm.The OAm amount in the synthesis can significantly control the morphology of Fe3O4NPs.As the OAm content increased from 10 ml to 30 ml,the faceted nanoprisms shrank while the nanospheres enlarged.At an OAm content of 25 ml,the nanoprisms diminished while more hexagonal and sphere-like particles appeared,implying a critical point of morphology transition from triangle to hexagon.The magnetic properties also depended on the NP morphology and size.The prepared Fe3O4NPs are promising candidates in medical applications such as magnetic resonance imaging,targeted drug delivery,blood purification,and tumor hyperthermia.

关键词： Fe 3 O 4 Nanoparticles Nanoprism Nanosphere Superparamagnetic

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高压氧辅助治疗对脑膜瘤患者术后复发的影响

中华航海医学与高气压医学杂志 2024年第2期31卷 211-214,256页

作者：代艳芬董安华万金娥仲蓓林绍梅谷健青岛大学附属医院高压氧科青岛266003 青岛大学附属医院器官移植科青岛266003

目的分析高压氧治疗对脑膜瘤患者术后复发的影响。方法对2011年1月至2019年1月青岛大学附属医院神经外科收治的196例术后病理学确诊为脑膜瘤的患者进行随访,采用单因素Kaplan-Meier生存分析探讨脑膜瘤术后复发因素及高压氧治疗对脑膜瘤... 详细信息

目的分析高压氧治疗对脑膜瘤患者术后复发的影响。方法对2011年1月至2019年1月青岛大学附属医院神经外科收治的196例术后病理学确诊为脑膜瘤的患者进行随访,采用单因素Kaplan-Meier生存分析探讨脑膜瘤术后复发因素及高压氧治疗对脑膜瘤术后复发的影响。结果196例患者随访过程中失访8例、死亡18例,随访中位时间[85(68,103)]个月;有效随访的170例患者中,出现脑膜瘤复发27例。单因素Kaplan-Meier生存分析显示,肿瘤最大直径和病理亚型是影响肿瘤复发的因素(P<0.05),而是否接受高压氧治疗对肿瘤复发没有影响;高压氧治疗组较常规治疗组总体生存期延长(P=0.032),2组肿瘤最大直径和病理亚型等一般资料差异无统计学意义;高压氧治疗组内,复发组患者年龄明显大于未复发组(P=0.028)。结论脑膜瘤术后给予患者高压氧治疗对脑膜瘤术后复发无影响,本研究对临床应用起到一定指导作用。

关键词：高压氧脑膜瘤神经外科手术复发

高压氧辅助治疗对糖尿病患者血糖影响的Meta分析

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中华航海医学与高气压医学杂志 2024年第1期31卷 36-40页

作者：代艳芬董安华仲蓓万金娥林绍梅谷健青岛大学附属医院高压氧科青岛266003 青岛大学附属医院器官移植科青岛266003

目的分析高压氧(HBO)辅助治疗糖尿病时对血糖的影响。方法检索PubMed、Embase、CBM、CNKI、VIP和万方数据库(wan-FANG DATA)等数据库,时间限定为自建库至2022年1月。收集高压氧联合常规药物治疗糖尿病的随机对照试验(RCTs)。3名研究者... 详细信息

目的分析高压氧(HBO)辅助治疗糖尿病时对血糖的影响。方法检索PubMed、Embase、CBM、CNKI、VIP和万方数据库(wan-FANG DATA)等数据库,时间限定为自建库至2022年1月。收集高压氧联合常规药物治疗糖尿病的随机对照试验(RCTs)。3名研究者独立筛选收集到的RCTs,提取相关数据、评估文献质量。应用RevMan 5.3软件进行Meta分析。结果本研究共纳入8个RCTs,Meta分析结果显示,与对照组相比,高压氧联合常规治疗组患者的空腹血糖、餐后2 h血糖、糖化血红蛋白明显降低(P≤0.01)。结论高压氧辅助治疗糖尿病可降低患者的血糖水平,为高压氧的临床应用提供证据。

关键词：糖尿病高压氧 Meta分析

Fission track dating of the Cenozoic uplift in Mabian area, southern Sichuan Province, China

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Science China Earth Sciences 2008年第9期51卷 1238-1247页

作者： AN yanfen HAN ZhuJun wan JingLin Institute of Geology China Earthquake AdministrationBeijing 100029China

The apparent ages of samples are obtained from fission track dating of apatite samples collected from the fault zones in Mabian area, southern Sichuan Province. In addition, thermal history is simulated from the obtained data by applying AFT Solve Program, to acquire the thermal evolution history of the samples. The result shows that tectonically the Mabian area was relatively stable between 25 and 3 Ma, compared to the inner parts and other marginal areas of the Tibetan Plateau. The studied area had little response to the rapid uplift events that occurred for several times in the Tibetan Plateau during 25-3 Ma. The latest thermal event related to the activity of the Lidian fault zone (about 8 Ma ) is later than that of the Ebian fault zone (18-15 Ma ) to the west, indicating to some extent that the evolution of fault activity in the Mabian area has migrated from west to east. The latest extensive tectonic uplift occurred since about 3 Ma. As compared with the Xianshuihe fault zone, the Mabian area is closer to the east- ern margin of the plateau, while the time of fast cooling event in this area is later than that in the southeast segment of the Xianshuihe fault zone (3.6-3.46 Ma ). It appears to support the assumption of episodic uplift and stepwise outward extension of the eastern boundary of the Tibetan Plateau in late Cenozoic.

关键词： Mabian area southern Sichuan Province apatite fission track thermal history simulation uplift fault activity

临床实践中护生习得性无助现状及影响因素分析

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卫生职业教育 2024年第11期42卷 83-86页

作者：周巧万瑜苟玲杨丽英彭洪付艳芬大理大学护理学院云南大理671000 宜宾市第二人民医院四川宜宾644000 西南医科大学附属医院四川泸州646000

目的了解临床实践中护生习得性无助现状及其影响因素。方法采用便利抽样法,于2022年8—9月选取3所综合医院的护理专业实习生为研究对象进行问卷调查。结果护生习得性无助量表总分为(32.18±16.67)分。多重线性回归分析结果显示,学历... 详细信息

目的了解临床实践中护生习得性无助现状及其影响因素。方法采用便利抽样法,于2022年8—9月选取3所综合医院的护理专业实习生为研究对象进行问卷调查。结果护生习得性无助量表总分为(32.18±16.67)分。多重线性回归分析结果显示,学历、家庭人均月收入、选择护理专业的原因、是否有信心迎接未来职业挑战、实习医院等级和社会支持是临床实践中护生习得性无助的影响因素(P<0.05)。结论护生习得性无助处于较低水平,且受多种因素影响。班主任和临床带教教师需重视护生心理健康状况,适时予以正确引导。

关键词：护生临床实践习得性无助社会支持

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Oscillation in Response and Recovery Properties of SnO_2 Gas Sensor

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稀有金属材料与工程 2006年第A3期35卷 148-151页

作者： Peng Yang yanfen wan Quanxi Cao School of Technical Physics Xidian University Xi＇an 710071 China

Six kinds of Sn(OH)_4 precipitates were prepared by the chemical precipitation method (liquid-phase),of which the pH values are 3.0 (sample 1),4.5 (sample 2),6.0 (sample 3),7.5 (sample 4),9.0 (sample 5) and 10.5 (sample 6),respectively. After washed and dried,the Sn(OH)_4 precipitates were first calcined into tin oxide powder.Six kinds of gas sensors were made from the obtained SnO_2 powders.The XRD patterns of all the samples were recorded.The sensing properties of all samples to C_2H_5OH and H_2 gases were measured in different gas concentrations and temperatures,including the sensitivities of all samples,their response and recovery properties.The recovery properties of all samples to C_2H_5OH exhibit the sinusoidal oscillation character.

关键词： SnO2 gas sensor sensitivity response time recovery time oscillation

面向双碳目标的水淡技术:生物质碳用于界面太阳能光蒸汽转化技术的研究进展

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材料导报 2023年第12期37卷 1-13页

作者：赵春波赵嵘戚剑飞庄文博刘婕陈沛万艳芬杨鹏云南大学材料与能源学院昆明650500

面向碳达峰、碳中和目标,针对当前人们所面临的淡水紧缺和能源危机,研究者们致力于寻找低碳、环保和可持续发展的解决途径。近年来,研究者们对利用“绿色能源--太阳能”和“蓝色能源---海洋”以可持续生产淡水给予极大的关注,试图获得... 详细信息

面向碳达峰、碳中和目标,针对当前人们所面临的淡水紧缺和能源危机,研究者们致力于寻找低碳、环保和可持续发展的解决途径。近年来,研究者们对利用“绿色能源--太阳能”和“蓝色能源---海洋”以可持续生产淡水给予极大的关注,试图获得高的能源转化效率以解决淡水与清洁能源两大资源问题,并以此降低碳排放,为碳中和目标助力。界面太阳能光蒸汽转化技术是目前缓解淡水危机极有效的手段之一,凭借其高效的太阳能热利用、出色的光热转化率和高的水蒸发产量而备受关注。界面系统主要包括光吸收器和蒸发装置。其中,碳基光热材料是光吸收器的热门选材之一,尤其生物质碳具有绿色环保、价格低廉、可再生以及变废为宝等优点而颇受欢迎。本文系统地梳理并阐述了基于生物质碳的太阳能光蒸汽转化系统中的材料设计、系统设计、亲水设计、水传输通道设计和抗盐设计,简述了生物质碳的光热转化机理和光热系统的性能评估,最后从实际应用的角度总结了生物质碳在海水淡化和电能生产中的应用研究,并针对当前该领域所面临的挑战和机遇提出了未来几年内的研究热点。

关键词：双碳目标生物质碳界面太阳能光蒸汽转化淡化电能生产