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Freestanding macroscopic metal-oxide nanotube films derived from carbon nanotube film templates

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Nano Research 2015年第6期8卷 2024-2032页

作者： He Ma yang Wei jiangtao wang Xiaoyang Lin Wenyunwu yang wu Ling Zhang Peng Liu jiaping wang Qunqing Li shoushan Fan kaili jiang State Key Laboratory of Low-Dimensional Quantum Physics Department of Physics & Tsinghua-Foxconn Nanotechnology Research Center Tsinghua University Beijing 100084 China

Aligned carbon nanotube films coated with amorphous carbon were developed into novel templates by atomic layer deposition. Freestanding macroscopic metal-oxide nanotube films were then successfully synthesized by using these templates. The reactive amorphous carbon layer greatly improved the nuclei density, which ensured the high quality of the films and allowed for precise control of the wall thickness of the nanotubes. Using template-synthesized alumina nanotube films, we demonstrate a humidity sensor with a high response speed, a transmission electron microscopy （TEM） grid, and a catalyst support. The cross- stacked assembly, ultrathin thickness, chemical inertness, and high thermal stability of the alumina nanotube films contributed to the excellent performance of these devices. In addition, it is expected that the metal-oxide nanotube films would have significant potential owing to their material richness, macroscopic appearance, flexibility, compatibility with the semiconducting technologies, and the feasibility of mass production.

关键词： metal-oxide nanotube film atomic layer deposition carbon nanotube humidity sensor catalyst support

High areal capacity flexible sulfur cathode based on multi-functionalized super-aligned carbon nanotubes

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Nano Research 2019年第5期12卷 1105-1113页

作者： Lujie Jia Jian wang Zijin Chen Yipeng Su Wei Zhao Datao wang yang Wei kaili jiang jiaping wang yang wu Jia Li Wenhui Duan shoushan Fan Yuegang Zhang State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics Tsinghua UniversityBeijing 100084China i-Lab Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123China Laboratory for Computational Materials Engineering Division of Energy and Environment Graduate School at ShenzhenTsinghua UniversityShenzhen 518055China

Rational design of a robust carbon matrix has a profound impact on the performance of flexible/wearable lithium/sulfur ***,we demonstrate a freestanding three-dimensional super-aligned carbon nanotube (SACNT) matrix reinforced with a multi-functionalized carbon coating for flexible,high-areal sulfur loading *** employing the sulfur/nitrogen co-doped carbon (SNC)"glue",the joints in the SACNT scaffold are tightly welded together so that the overall mechanical strength of the electrode is significantly enhanced to withstand the repeated bending as well as the volume change during *** SNC also shows intriguing catalytic effect that lowers the energy barrier of Li ion transport,propelling a superior redox conversion *** resulting binder-free and current collector-free sulfur cathode exhibits a high reversible capacity of 1,079 mAh·g^-1 at 1 C,a high-rate capacity of ~ 800 mAh·g^-1 at 5 C,and an average capacity decay rate of 0.037% per cycle at 2 C for 1,500 ***,a large-areal flexible Li/S pouch cell based on such mechanically robust cathode exhibits excellent capacity retention under arbitrary bending *** a high areal sulfur loading of 7 mg·cm^-2,the large-areal flexible cathode delivers an outstanding areal capacity of 6.3 mAh·cm^-2 at 0.5 C (5.86 mA·cm^-2),showing its promise for realizing practical high energy density flexible Li/S batteries.

关键词： lithium/sulfur battery flexible electrode multi-functional carbon glue high areal capacity

Interface dipole enhancement effect and enhanced Rayleigh scattering

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Nano Research 2015年第1期8卷 303-319页

作者： Wenyun wu Jingying Yue Dongqi Li Xiaoyang Lin Fangqiang Zhu Xue Yin Jun Zhu Xingcan Dai Peng Liu yang Wei jiaping wang Haitao yang Lina Zhang Qunqing Li shoushan Fan kaili jiang State Key Laboratory of Low-Dimensional Quantum Physics Department of Physics & Tsinghua-Foxconn Nanotechnology Research Center Tsinghua University Beijing 100084 China Department of Physics Indiana University-Purdue University Indianapolis Indianapolis Indiana USA State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision Instruments Tsinghua University Beijing 100084 China Collaborative Innovation Center of Quantum Matter Beijing 100084 China

The optical effect of a nanometer or sub-nanometer interfacial layer of condensed molecules surrounding individual nanomaterials such as single-walled carbon nanotubes （SWCNTs） has been studied theoretically and experimentally. This interfacial layer, when illuminated by light, behaves as an optical dipole lattice and contributes an instantaneous near field which enhances the local field on neighboring atoms, molecules, or nanomaterials, which in turn may lead to enhanced Rayleigh scattering, Raman scattering, and fluorescence. The theory of this interface dipole enhanced effect （IDEE） predicts that a smaller distance between the nanomaterials and the plane of the interracial layer, or a larger ratio of the dielectric constants of the interfacial layer to the surrounding medium, will result in a larger field enhancement factor. This prediction is further experimentally verified by several implementations of enhanced Rayleigh scattering of SWCNTs as well as in situ Rayleigh scattering of gradually charged SWCNTs. The interface dipole enhanced Rayleigh scattering not only enables true-color real-time imaging of nanomaterials, but also provides an effective means to peer into the subtle interfacial phenomena.

关键词： interface dipoleenhancement dielectric sphere near filed nanomaterials carbon nanotubes Rayleigh scattering

True-color real-time imaging and spectroscopy of carbon nanotubes on substrates using enhanced Rayleigh scattering

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Nano Research 2015年第8期8卷 2721-2732页

作者： Wenyun wu Jingying Yue Xiaoyang Lin Dongqi Li Fangqiang Zhu Xue Yin Jun Zhu jiangtao wang Jin Zhang Yuan Chen Xinhe wang Tianyi Li Yujun He Xingcan Dai Peng Liu yang wei jiaping wang Wei Zhang Yidong Huang Li Fan Lina Zhang Qunqing Li shoushan Fan kaili jiang State Key Laboratory of Low-Dimensional Quantum Physics Department of Physics & Tsinghua-Foxconn Nanotechnology Research Center Tsinghua University Beijing 100084 China Department of Physics Indiana University-Purdue University Indianapolis Indianapolis Indiana USA State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision Instruments Tsinghua University Beijing 100084 China Collaborative Innovation Center of Quantum Matter Beijing 100084 China Tsinghua National Laboratory for Information Science and Technology Department of Electronic Engineering Tsinghua University Beijing 100084 China

Single-walled carbon nanotubes （SWCNTs） illuminated by white light should appear colored due to resonance Rayleigh scattering. However, true-color imaging of SWCNTs on substrates has not been reported, because of the extremely low scattering intensity of SWCNTs and the strong substrate scattering. Here we show that Rayleigh scattering can be greatly enhanced by the interface dipole enhancement effect. Consequently colorful SWCNTs on substrates can be directly imaged under an optical microscope by wide field supercontinuum laser illumination, which facilitates high throughput chirality assignment of individual SWCNTs. This approach, termed ＂Rayleigh imaging microscopy＂, is not restricted to SWCNTs, but widely applicable to a variety of nanomaterials, which enables the colorful nanoworld to be explored under optical microscopes.

关键词： enhanced Rayleigh scattering Rayleigh imaging microscopy true-color imaging carbon nanotube interface dipole

预氯化输水对表面停留性有机物及混凝除藻的影响

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环境工程学报 2024年第1期18卷 130-138页

作者：倪蓉姜元承李海燕王茜张长禄吴佳萍谢琤琤张明顺戚菁胡承志北京建筑大学环境与能源工程学院北京102616 中国科学院生态环境研究中心北京100085 中持新概念环境发展宜兴有限公司宜兴214000

针对预氯化这一常用的预氧化方法,考察了表面停留性有机物(S-AOM)在这一过程中对铜绿微囊藻起到的关键作用。同时,探讨了表面停留性有机物及藻的氧化应激对混凝除藻效果的影响。结果表明,预氯化过程可实现适度预氯化的最佳氯投加量,适... 详细信息

针对预氯化这一常用的预氧化方法,考察了表面停留性有机物(S-AOM)在这一过程中对铜绿微囊藻起到的关键作用。同时,探讨了表面停留性有机物及藻的氧化应激对混凝除藻效果的影响。结果表明,预氯化过程可实现适度预氯化的最佳氯投加量,适度预氯化可以在实现脱附S-AOM的同时不损伤藻细胞,强化后续混凝除藻的效果。此外,经过适度预氯化后的藻细胞在远程输水过程中可能会发生程序性死亡,胞内有机物不断泄漏,这仍会对水厂混凝除藻效果产生不利影响。因此,预氧化后藻细胞发生程序性死亡是预氯化强化混凝工艺需要考虑的关键因素。

关键词：表面停留性有机物预氯化除藻混凝

CD9 negatively regulates collective electrotaxis of the epidermal monolayer by controlling and coordinating the polarization of leader cells

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Burns & Trauma 2023年第1期11卷 361-374页

作者： Xiaoqiang Liu Jinrui yang Meng Kong Min jiang Luojia Liu Jinghong Zhang Ying Chen Xu Chen Ze Zhang Chao wu Xupin jiang Jie Liu jiaping Zhang Department of Plastic Surgery State Key Laboratory of TraumaBurns and Combined InjurySouthwest HospitalThird Military Medical University(Army Medical University)29 Gaotan Yan StreetShapingba400038 ChongqingChina

Background:Endogenous electric fields(EFs)play an essential role in guiding the coordinated collective migration of epidermal cells to the wound centre during wound *** polarization of leadercells is essential for collective migration,the signal mechanisms responsible for the EF-induced polarization of leader cells under electrotactic collective migration remain *** study aims to determine how the leader cells are polarized and coordinated during EF-guided collective migration of epidermal cell ***:Collective migration of the human epidermal monolayer(human immortalized ker-atinocytes HaCaT)under EFs was observed via time-lapse *** involvement of tetraspanin-29(CD9)in EF-induced fibrous actin(F-actin)polarization of leader cells as well as electrotactic migration of the epidermal monolayer was evaluated by genetic ***,rescue and co-culture experiments were conducted to explore the downstream signalling of ***:EFs guided the coordinated collective migration of the epithelial monolayer to the anode,with dynamic formation of pseudopodia in leader cells at the front edge of the monolayer along the direction of migration.F-actin polarization,as expected,played an essential role in pseudopod formation in leader cells under *** confocal microscopy,we found that CD9 was colocalized with F-actin on the cell surface and was particularly downregulated in leader cells by ***,genetic overexpression of CD9 abolished EF-induced F-actin polarization in leader cells as well as collective migration in the epidermal ***,CD9 determined the polarization of F-actin in leader cells by downregulating a disintegrin and metalloprotease 17/heparin-binding epidermal growth factor-like growth factor/epidermal growth factor receptor(ADAM17/HB-EGF/EGFR)*** abolished polarization of leader cells due to CD9 overex-pression could be restored in a co-culture monolayer where normal c

关键词： CD9 Electric fields Collective migration Wound healing F-actin polarization leader cells

点阵CO_(2)激光联合其他非手术方式治疗痤疮瘢痕安全性的网状Meta分析

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中国美容整形外科杂志 2024年第8期35卷 465-470,I0006,I0007页

作者：蒋敏夏录凡张警泓陈煦刘骆家张泽刘小强武潮江旭品陈颖张家平陆军军医大学(第三军医大学)第一附属医院整形外科(创伤与化学中毒国家重点实验室) 重庆400038

目的系统评价点阵CO_(2)激光联合其他非手术方式治疗痤疮瘢痕的安全性.方法陆军军医大学(第三军医大学)第一附属医院整形外科通过检索Pubmed、Embase、Cochrane Library、Wanfang Data和CNKI数据库,搜索有关点阵CO_(2)激光和点阵CO_(2)... 详细信息

目的系统评价点阵CO_(2)激光联合其他非手术方式治疗痤疮瘢痕的安全性.方法陆军军医大学(第三军医大学)第一附属医院整形外科通过检索Pubmed、Embase、Cochrane Library、Wanfang Data和CNKI数据库,搜索有关点阵CO_(2)激光和点阵CO_(2)激光联合其他非手术方式治疗痤疮瘢痕安全性的随机对照试验(RCT),检索时限均为建库至2023年6月.由2名研究者独立筛选文献、提取资料并评价纳入研究的偏倚风险后,采用Stata 16.0软件进行网状Meta分析.结果共纳入55个RCT,包括4779例患者.网状Meta分析结果显示,在色素沉着发生率方面,最佳累积概率排序为:点阵CO_(2)激光+富血小板血浆(platelet-rich plasma,PRP;79.9%)>点阵CO_(2)激光+表皮生长因子凝胶(70.2%)>点阵CO_(2)激光+硅酮凝胶(64.3%)>点阵CO_(2)激光+胶原贴敷料(58.0%)>点阵CO_(2)激光+透明质酸敷料(56.6%)>点阵CO_(2)激光+重组碱性成纤维细胞生长因子(55.6%)>点阵CO_(2)激光+积雪苷霜(51.8%)>点阵CO_(2)激光+果酸(38.8%)>点阵CO_(2)激光+微针(23.4%)>点阵CO_(2)激光(1.3%).在误工时间方面,最佳累积概率排序为:点阵CO_(2)激光+PRP(97.0%)>点阵CO_(2)激光+表皮生长因子凝胶(72.8%)>点阵CO_(2)激光+硅酮凝胶(68.7%)>点阵CO_(2)激光+积雪苷霜(40.7%)>点阵CO_(2)激光+胶原贴敷料(20.7%)>点阵CO_(2)激光(0).在水肿发生率方面,最佳累积概率排序为:点阵CO_(2)激光+PRP(73.5%)>点阵CO_(2)激光+表皮生长因子凝胶(70.4%)>点阵CO_(2)激光+胶原贴敷料(68.8%)>点阵CO_(2)激光+透明质酸敷料(63.8%)>点阵CO_(2)激光+果酸(51.0%)>点阵CO_(2)激光+硅酮凝胶(36.0%)>点阵CO_(2)激光(19.9%)>点阵CO_(2)激光+重组碱性成纤维细胞生长因子(16.4%).在感染发生率方面,最佳累积概率排序为:点阵CO_(2)激光+PRP(75.6%)>点阵CO_(2)激光+表皮生长因子凝胶(71.7%)>点阵CO_(2)激光(33.3%)>点阵CO_(2)激光+微针(19.4%).结论点阵CO_(2)激光联合PRP可能是点阵CO_(2)激光联合其他非手术方式治疗痤疮瘢痕中最安全的治疗方式,可以有效降低单用点阵CO_(2)激光治疗痤疮瘢痕过程中的色素沉着发生率、误工时间、水肿和感染发生率,增加患者的依从性.

关键词：痤疮瘢痕点阵CO_(2)激光安全性网状Meta分析

足疗程去甲基化药物治疗骨髓增生异常综合征：多中心回顾性研究

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中华血液学杂志 2024年第8期45卷 738-747页

作者：刘晓珍周淑娟黄健赵彩芳蒋灵旭张喻堤梅琛马丽亚周歆平邵燕萍吴功强肖希斌姚荣欣杜小红胡通林钱申贤李园严雪芬黄黎王曼玲傅佳萍寿黎红江文华金伟媚李琳洁乐静罗文纪张蕴周秀杰张浩郎香花周梅金洁蒋慧芳张瑾欧阳桂芳佟红艳浙江大学医学院附属第一医院血液科杭州温州医科大学附属第一医院血液科温州浙江大学医学院附属第四医院血液科义乌金华市中心医院血液科金华浙江省台州医院血液科台州东阳市人民医院血液科东阳浙江大学医学院附属第二医院血液科杭州温州医科大学附属第二医院血液科温州宁波市鄞州人民医院血液科宁波浙江省中医院血液科杭州杭州市第一人民医院血液科杭州嘉兴市第一医院血液科嘉兴衢州市人民医院血液科衢州金华市人民医院血液科金华浙江省人民医院血液科杭州绍兴市人民医院血液科绍兴湖州市中心医院血液科湖州台州市第一人民医院血液科台州丽水市人民医院血液科丽水丽水市中心医院血液科丽水宁波市医疗中心李惠利医院血液科宁波杭州市萧山区第一人民医院血液科杭州乐清市人民医院血液科乐清海宁市人民医院血液科海宁瑞安市人民医院血液科瑞安永康市第一人民医院血液科永康诸暨市人民医院血液科诸暨浙江省立同德医院血液科杭州浙江大学医学院附属邵逸夫医院血液科杭州宁波大学附属第一医院血液科宁波

目的研究去甲基化药物(HMA)足疗程治疗骨髓增生异常综合征(MDS)的疗效和安全性。方法纳入来自浙江省45家医院的409例接受了至少连续4个周期的HMA单药起始治疗的MDS患者, 评估HMA疗效和安全性。采用Mann-WhitneyU或卡方检验比较组间临床... 详细信息

目的研究去甲基化药物(HMA)足疗程治疗骨髓增生异常综合征(MDS)的疗效和安全性。方法纳入来自浙江省45家医院的409例接受了至少连续4个周期的HMA单药起始治疗的MDS患者, 评估HMA疗效和安全性。采用Mann-WhitneyU或卡方检验比较组间临床资料差异, 采用Logistic回归和Cox回归分析疗效与生存的影响因素, 采用Kaplan-Meier法进行生存分析。结果 409例患者HMA治疗的中位疗程为6(4～25)个疗程。完全缓解(CR)率为33.98%, 总缓解率(ORR)为77.02%。多因素分析显示, 复杂核型(P=0.02, OR=0.39, 95%CI 0.18～0.84)是CR的独立良好影响因素;TP53突变(P=0.02, OR=0.22, 95%CI 0.06～0.77)是ORR的独立良好预测因素。患者的中位总生存(OS)时间为25.67(95%CI 21.14～30.19)个月, HMA治疗有反应(P=0.036, HR=0.47, 95%CI 0.23～0.95)是OS的独立良好预后因素, 而伴有复杂核型(P=0.024, HR=2.14, 95%CI 1.10～4.15)、发生白血病转化(P<0.001, HR=2.84, 95%CI 1.64～4.92)、TP53突变(P=0.012, HR=2.19, 95%CI 1.19～4.07)均是OS的独立不良预后因素。HMA减剂量较标准剂量在疗效和中位OS时间均无显著差异。地西他滨和阿扎胞苷治疗组的CR率、ORR均无显著差异。接受地西他滨治疗患者的中位OS时间长于接受阿扎胞苷治疗患者(29.53个月对20.17个月, P=0.007), 但地西他滨组严重骨髓抑制、肺炎发生率高于阿扎胞苷组。结论在患者能够耐受情况下, 连续规律地使用适当剂量的HMA, 有利于MDS患者最大程度从治疗中获益。

关键词：骨髓增生异常综合征去甲基化药物地西他滨阿扎胞苷预后

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切向超声辅助氧化锆陶瓷镜面磨削试验研究

航空制造技术 2022年第8期65卷 69-75页

作者：乔家平汪强武韩强曾江吴勇波哈尔滨工业大学哈尔滨150000 南方科技大学深圳518055

氧化锆陶瓷具有高脆性、低断裂韧性等特点,精密加工难度大,一直限制着其应用。针对这一难题,提出了切向超声辅助镜面磨削的精密加工方法,研究了超声振幅对工件表面粗糙度、磨削力和磨削温度的影响,以及有/无超声作用下砂轮的磨损状况等... 详细信息

氧化锆陶瓷具有高脆性、低断裂韧性等特点,精密加工难度大,一直限制着其应用。针对这一难题,提出了切向超声辅助镜面磨削的精密加工方法,研究了超声振幅对工件表面粗糙度、磨削力和磨削温度的影响,以及有/无超声作用下砂轮的磨损状况等基础加工特性。结果表明,切向超声辅助磨削可以实现氧化锆陶瓷镜面加工,在振幅A;=4.66μm时,与传统磨削(A;=0)相比,工件表面粗糙度下降43.8%,达到了R;19.9nm;法向磨削力随着超声振幅增大而下降,最大下降34%,但下降速率逐渐变小;磨削温度也随着超声振幅增大而下降,当A;=4.66μm时,磨削温度比无超声时下降34.5%。此外,切向超声辅助磨削加工可以改善砂轮的磨损状况,减少砂轮上磨粒的脱落,延长砂轮使用寿命。

关键词：氧化锆陶瓷切向超声辅助磨削表面粗糙度磨削力磨削温度