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Spectroscopy and carrier dynamics of one-dimensional nanostructures

Journal of Semiconductors 2022年第12期43卷 12-21页

作者： Yutong Zhang Zhuoya Zhu Shuai Zhang Xianxin Wu Wenna Du Xinfeng Liu CAS Key Laboratory of Standardization and Measurement for Nanotechnology CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China

In recent years,one-dimensional(1D)nanomaterials have raised researcher's interest because of their unique structur-al characteristic to generate and confine the optical signal and their promising prospects in photonic *** this re-view,we summarized the recent research advances on the spectroscopy and carrier dynamics of 1D ***,the condensation and propagation of exciton-polaritons in nanowires(NWs)are ***,we discussed the properties of 1D photonic crystal(PC)and applications in photonic-plasmonic ***,the observation of topological edge states in 1D topological structures is ***,the perspective on the potential opportunities and remaining chal-lenges of 1D nanomaterials is proposed.

关键词： one-dimensional nanostructures carrier dynamics nanowires exciton-polaritons photonic crystals topological struc-tures

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Thermal Growth and Nanomagnetism of the Quasi-one dimensional Iron Oxide

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Journal of Materials Science & Technology 2011年第11期27卷 985-990页

作者： Minglong Zhong Zhongwu Liu Xichun Zhong Hongya Yu Dechang Zeng School of Materials Science and Engineering South China University of Technology Guangzhou 510640 China

Quasi-one dimensional iron oxide nanowires with flat needle shape were synthesized on the iron powders by a rather simple catalyst-free thermal oxidation process in ambient atmosphere. The characterization by field emission scanning electron microscopy （FE-SEM）, X-ray photoelectron spectroscopy （XPS）, X-ray diffraction （XRD）, Raman and high-resolution transmission electron microscopy （HRTEM） revealed that these nanos- tructures are single crystalline α-Fe2O3. The various dimensions with 40-170 nm in width and 1-8 μm in length were obtained by tuning the growth temperature from 280 to 480℃. A surface diffusion mechanism was proposed to account for the growth of quasi-one dimensional nanostructure. The typical α-Fe203 nanowires synthesized at 430℃ had a reduced Morin temperature TM of 131 K in comparison with their bulk counterpart. The coercivitis Hc of these nanowires are 321 and 65 Oe at 5 and 300 K, respectively. The temperature of synthesis also has important effects on the magnetic properties of these nanowires.

关键词： Thermal growth one-dimensional nanostructures Iron oxide Magnetic materials

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Template-directed Electrodeposition of SnO2 Nanotubes and 1D Zn/SnO2 Core-shell nanostructures

Template-directed Electrodeposition of SnO2 Nanotubes and 1D...

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中国材料大会2012

作者： Min Lai Yi Jian Yan Ma Gaige Zheng Kun Zhong Xiang Li School of Physics and Optoelectronic Engineering Nanjing University of Information Science & Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control School of Environmental Science and Engineering Nanjing University of Information Science & Technology

ISBN: (纸本)9783037856079

Template-directed electrosynthesis has been employed widely to prepare solids of defined dimension. It offers controllable routes to create nanostructures. In this study, one electrochemical method to fabricate one-dimensional metal oxide nanostructures was developed. The electrochemistry strategy was employed to manipulate the pH value within the pores of a template and the growth of continuous one-dimensional metal oxide nanostructures was controlled. The strategy was exemplified by the growth of tin oxide nanotubes. At room temperature, the reduction of nitrate within pores was employed to electrogenerate hydroxide ions and drive local precipitation of stannic oxide nanotubes. The nanotube walls displayed nearly uniform thickness along their entire length which were obtained within commercial track-etched polycarbonate membranes. one-dimensional Zn/SnO2 core-shell nanostructures were achieved by the further electrodeposition of Zn within SnO2 nanotubes.

关键词： Template Electrodeposition one-dimensional nanostructures Core-shell

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纳米通道限域生长制备取向生长的钙钛矿纳米线阵列及其在偏振光探测方面的应用

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Science China Materials 2021年第10期64卷 2497-2506页

作者：黄瑞林笛婳刘佳音吴春艳吴翟罗林保 School of Electronic Science and Applied Physics Hefei University of TechnologyHefei 230009China School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450052China

有序排列、取向生长的钙钛矿纳米线阵列的合成通常需要复杂的工艺条件和精密的仪器设备,这不利于其广泛应用.本文提出了一种纳米通道限域生长的方法来制备钙钛矿纳米线阵列.利用场发射扫描电子显微镜、原子力显微镜和X射线衍射等分析手... 详细信息

有序排列、取向生长的钙钛矿纳米线阵列的合成通常需要复杂的工艺条件和精密的仪器设备,这不利于其广泛应用.本文提出了一种纳米通道限域生长的方法来制备钙钛矿纳米线阵列.利用场发射扫描电子显微镜、原子力显微镜和X射线衍射等分析手段,表征了纳米线阵列的形貌和晶体结构,证明了该方法可用于在各种衬底上制备大面积的具有取向生长特点的不同种类的钙钛矿纳米线阵列.基于MAPb I3纳米线阵列所制备的光电探测器光响应优异,响应度和比探测率分别为20.56 A W^(-1)和4.73×10^(12)Jones.此外,由于所制备的一维钙钛矿纳米线结构的各向异性,该光电探测器还实现了对于偏振光的探测,其偏振比为2.2.

关键词： nanochannel-confined growth one-dimensional nanostructures optoelectronic devices polarization photodetection template

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one-dimensional supramolecular nanoassemblies of a zinc porphyrin:from nanorods to porous nanobamboos

One-dimensional supramolecular nanoassemblies of a zinc porp...

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中国化学会第五届卟啉与酞菁学术研讨会

作者： Nannan Wang Penglei Chen Minghua Liu CAS Key Lab of Colloid Interface and Chemical ThermodynamicsInstitute of ChemistryChinese Academy of Sciences School of Chemical Science University of Chinese Academy of Sciences

one-dimensional（1 D） supramolecular nanostructures based on porphyrins have become the focus of much attention and paramount *** is owing to the fact that the rigid yet planar molecular skeleton of porphyrins endows them with intrinsic tendency to self-assembly to form 1 D nanostructures of well-defined structures via the cooperative interactions of pi-pi stacking and other noncovalent ***,this is also owing to the inherent merits of 1 D structures,wherein their large aspect ratio favors a directional charge transport with a reduced grain ***,this stems from their well-understood yet characteristic absorption in visible-light region,which provide their 1 D nanostructures with great scientific and technique opportunities in the area of energy transfer,molecular electronics,and sensors *** this report,we show that a commercial porphyrin,zinc 5,10,15,20-tetra（4-pyridyl）-21 H,23 H-porphine（ZnTPyP）,could be organized to form nanorods by means of a surfactant-assisted self-assembly protocol,wherein an oil-in-water system is employed as the assembly *** results show that the as-fabricated solid 1 D nanostructures could display excellent catalytic performances towards the photodegradation of organic pollutants under visible-light ***,it is found that the nanorods are transformed to form porous nanobamboos when the catalytic reactions are conducted under the similar experimental conditions without the involvement of organic *** on the results of ESR and other controlled experiments,a plausible explanation has been proposed for such fascinating *** investigation might provide a new protocol for the synthesis of porphyrin 1 D nanostructures of a porous bamboo-like *** might provide material basis for their further functionalization.

关键词： porphyrin one-dimensional nanostructures nanorods porous nanobamboo controllable assembly

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