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Y. M. Lu

Bio: Y. M. Lu is an academic researcher. The author has contributed to research in topics: Nanorod & Raman scattering. The author has an hindex of 1, co-authored 1 publications receiving 178 citations.

Papers
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Journal ArticleDOI
TL;DR: Self-assembled zinc oxide (ZnO) and indium-doping zinc oxide:In nanorod thin films were synthesized on quartz substrates without catalyst in aqueous solution by sol-gel method and illustrated that there were no single In2O3 phase in ZnO lattice after indium doping.
Abstract: Self-assembled zinc oxide (ZnO) and indium-doping zinc oxide (ZnO:In) nanorod thin films were synthesized on quartz substrates without catalyst in aqueous solution by sol-gel method. The samples were characterized by x-ray diffraction (XRD), scanning electron microscope (SEM), Raman-scattering spectroscopy, room-temperature photoluminescence (PL) spectra, and temperature-dependent PL spectra measurements. XRD and Raman spectra illustrated that there were no single In2O3 phase in ZnO lattice after indium doping. The PL spectra of ZnO showed a strong UV emission band located at 394nm and a very weak visible emission associated with deep-level defects. Indium incorporation induced the shift of optical band gap, quenching of the near-band-edge photoluminescence and enhanced LO mode multiphonon resonant Raman scattering in ZnO crystals at different temperatures. Abnormal temperature dependence of UV emission integrated intensity of ZnO and ZnO:In samples is observed. The local state emission peak of ZnO:In sam...

190 citations

Journal ArticleDOI
18 May 2022
TL;DR: “重型新冠肺炎时需警惕混合感染”
Abstract: 患儿 男,3岁10月龄,因“间歇发热2周伴咳嗽、气促”入上海交通大学医学院附属仁济医院(南部院区)定点医院隔离病房。患儿病初发热,确诊为新型冠状病毒肺炎(简称新冠肺炎),热退2 d再次持续高热>3 d伴气促、吸气性凹陷,胸部CT示右肺下叶片状密度影,诊断“重型新冠肺炎”,行支气管镜肺泡灌洗,宏基因组病原检测确诊为混合肺炎支原体感染,治疗好转出院。提示临床医生诊治重型新冠肺炎时需警惕混合感染。.

3 citations


Cited by
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Journal ArticleDOI
01 Aug 2006-Small
TL;DR: A review of current research on the optical properties of ZnO nanostructures and results of nonlinear optical studies, such as second-harmonic generation, are presented.
Abstract: We present a review of current research on the optical properties of ZnO nanostructures. We provide a brief introduction to different fabrication methods for various ZnO nanostructures and some general guidelines on how fabrication parameters (temperature, vapor-phase versus solution-phase deposition, etc.) affect their properties. A detailed discussion of photoluminescence, both in the UV region and in the visible spectral range, is provided. In addition, different gain (excitonic versus electron hole plasma) and feedback (random lasing versus individual nanostructures functioning as Fabry-Perot resonators) mechanisms for achieving stimulated emission are described. The factors affecting the achievement of stimulated emission are discussed, and the results of time-resolved studies of stimulated emission are summarized. Then, results of nonlinear optical studies, such as second-harmonic generation, are presented. Optical properties of doped ZnO nanostructures are also discussed, along with a concluding outlook for research into the optical properties of ZnO.

1,746 citations

Journal ArticleDOI
TL;DR: In this paper, a brief overview of synthesis methods of ZnO nanostructures, with particular focus on the growth of perpendicular arrays of nanorods/nanowires which are of interest for optoelectronic device applications.

950 citations

Journal ArticleDOI
TL;DR: A comprehensive review of the state-of-the-art research activities that focus on the Q1D metal oxide systems and their physical property characterizations is provided in this paper, where a range of remarkable characteristics are organized into sections covering a number of metal oxides, such as ZnO, In2O3, SnO2,G a 2O3 and TiO2, etc., describing their electrical, optical, magnetic, mechanical and chemical sensing properties.
Abstract: Recent advances in the field of nanotechnology have led to the synthesis and characterization of an assortment of quasi-one-dimensional (Q1D) structures, such as nanowires, nanoneedles, nanobelts and nanotubes. These fascinating materials exhibit novel physical properties owing to their unique geometry with high aspect ratio. They are the potential building blocks for a wide range of nanoscale electronics, optoelectronics, magnetoelectronics, and sensing devices. Many techniques have been developed to grow these nanostructures with various compositions. Parallel to the success with group IV and groups III–V compounds semiconductor nanostructures, semiconducting metal oxide materials with typically wide band gaps are attracting increasing attention. This article provides a comprehensive review of the state-of-the-art research activities that focus on the Q1D metal oxide systems and their physical property characterizations. It begins with the synthetic mechanisms and methods that have been exploited to form these structures. A range of remarkable characteristics are then presented, organized into sections covering a number of metal oxides, such as ZnO, In2O3, SnO2 ,G a 2O3, and TiO2, etc., describing their electrical, optical, magnetic, mechanical and chemical sensing properties. These studies constitute the basis for developing versatile applications based on metal oxide Q1D systems, and the current progress in device development will be highlighted. # 2006 Elsevier B.V. All rights reserved.

570 citations

Journal ArticleDOI
TL;DR: In this article, a coprecipitation method was used to synthesize ZnO nanoparticles and the crystalline sizes of synthesized samples were calculated from powder XRD patterns, which were found to decrease with the increase of cobalt content.
Abstract: Zn1–xCoxO (x = 0, 0.05, 0.10, and 0.15) nanoparticles (NPs) were synthesized by a coprecipitation method. The crystalline sizes of synthesized samples were calculated from the powder XRD patterns, which were found to decrease with the increase of cobalt content. The FT-IR spectra confirmed the Zn–O stretching bands at 468, 456, 452, and 461 cm–1 for the respective ZnO NPs. SEM images demonstrated the distinct flowerlike morphology. The photoluminescence spectra of all the samples exhibited a broad emission in the visible range. XPS studies were carried out for Zn0.90Co0.10O NPs. The carriers (donors) bound on the Co sites were observed from the micro-Raman spectroscopic studies. The pure and Co-doped ZnO NPs showed significant changes in the M–H loop where the diamagnetic behavior of ZnO changes to ferromagnetic nature when doping with Co. Oxygen vacancies and zinc interstitials were found to be the main reasons for room-temperature ferromagnetism in the Co-doped ZnO NPs with the support of the results ob...

316 citations

Journal ArticleDOI
TL;DR: Small crystallite size and low band gap were attributed to high activities of Fe-ZnO samples under various concentrations of Fe(3+) ions compared to undoped ZnO, and toxicity removal of 2-chlorophenol at same line of degradation efficiency was indicated.

245 citations