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Author

Zhe Wei

Bio: Zhe Wei is an academic researcher from Tsinghua University. The author has contributed to research in topics: Oleylamine. The author has an hindex of 3, co-authored 3 publications receiving 687 citations.
Topics: Oleylamine

Papers
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Journal ArticleDOI
Peng Li1, Zhe Wei, Tong Wu, Qing Peng, Yadong Li 
TL;DR: Because of their homogeneous composition and controlled morphology, the Au-ZnO hybrid nanopyramids demonstrate better photocatalytic efficiency than pure ZnO nanocrystals.
Abstract: We successfully synthesized Au−ZnO hybrid nanoparticles with a novel hexagonal pyramid-like structure. The growth process of the as-prepared hybrid nanopyramids is clearly discussed. Because of the...

584 citations

Journal ArticleDOI
Peng Li1, Caiyun Nan1, Zhe Wei1, Jun Lu1, Qing Peng1, Yadong Li1 
TL;DR: In this paper, a facile process for controllable synthesis of the Mn3O4 nanocrystals with different sizes and shapes, which includes dots, rods, and wires in the presence of the surfactants dodecanol and oleylamine, was reported.
Abstract: We report a facile process for the controllable synthesis of the Mn3O4 nanocrystals with different sizes and shapes, which includes dots, rods, and wires in the presence of the surfactants dodecanol and oleylamine. It is notable that the uniform-sized nanocrystals were achieved under mild experimental conditions and the common inorganic salt, such as manganese(II) nitrate, was adopted as the precursor. Furthermore, the as-prepared monodisperse nanocrystals, as ideal building blocks, can be rationally assembled into three-dimensional (3D) Mn3O4 colloidal spheres, using a facile ultrasonication strategy. In particular, the 3D colloidal spheres can be successfully converted to LiMn2O4 nanocrystals, which show distinct electrochemical performance, mainly depending on their crystallinity and size.

115 citations

Journal ArticleDOI
Peng Li1, Dingsheng Wang2, Zhe Wei2, Qing Peng2, Yadong Li2 
TL;DR: A simple solution-phase method to prepare ZnO nanostructures with controllable morphologies with unique optical properties is reported and it is hoped that this strategy will be a general and effective method for fabricating other metal oxide nanocrystals.
Abstract: In this study, we report a simple solution-phase method to prepare ZnO nanostructures with controllable morphologies. By using oleylamine (OAm) and dodecanol (DDL) as solvents, zinc oxide nanocrystals with tunable sizes and diverse shapes (hexagonal pyramids, bulletlike, and pencil-like shapes) have been obtained under mild conditions. At the same time, the introduction of presynthesized gold nanocrystals can also lead to the hybrid nanostructures of gold-zinc oxide hexagonal nanopyramids. In addition, the possible formation mechanism of the as-prepared ZnO nanostructures has been investigated. Notably, the unique optical properties of the ZnO nanostructures with different sizes and shapes have also been discussed. We hope that this strategy will be a general and effective method for fabricating other metal oxide nanocrystals.

25 citations


Cited by
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TL;DR: A comprehensive overview of the progress that has been made within the context of 1D ZnO nanostructures synthesized via wet chemical methods can be found in this paper, where the synthetic methodologies and corresponding growth mechanisms, different structures, doping and alloying, position-controlled growth on substrates, and finally, their functional properties as catalysts, hydrophobic surfaces, sensors, and in nanoelectronic, optical, optoelectronics, and energy harvesting devices.
Abstract: One-dimensional (1D) ZnO nanostructures have been studied intensively and extensively over the last decade not only for their remarkable chemical and physical properties, but also for their current and future diverse technological applications. This article gives a comprehensive overview of the progress that has been made within the context of 1D ZnO nanostructures synthesized via wet chemical methods. We will cover the synthetic methodologies and corresponding growth mechanisms, different structures, doping and alloying, position-controlled growth on substrates, and finally, their functional properties as catalysts, hydrophobic surfaces, sensors, and in nanoelectronic, optical, optoelectronic, and energy harvesting devices.

1,247 citations

Journal ArticleDOI
TL;DR: In this review, the developments in the field of (plasmonic metal)/semiconductor hybrid nanostructures are comprehensively described and possible future research in this burgeoning field is discussed.
Abstract: Hybrid nanostructures composed of semiconductor and plasmonic metal components are receiving extensive attention. They display extraordinary optical characteristics that are derived from the simultaneous existence and close conjunction of localized surface plasmon resonance and semiconduction, as well as the synergistic interactions between the two components. They have been widely studied for photocatalysis, plasmon-enhanced spectroscopy, biotechnology, and solar cells. In this review, the developments in the field of (plasmonic metal)/semiconductor hybrid nanostructures are comprehensively described. The preparation of the hybrid nanostructures is first presented according to the semiconductor type, as well as the nanostructure morphology. The plasmonic properties and the enabled applications of the hybrid nanostructures are then elucidated. Lastly, possible future research in this burgeoning field is discussed.

864 citations

Journal ArticleDOI
TL;DR: The application of anisotropic AuNPs has rapidly spread to optical, biomedical, and catalytic areas, and a summary of the synthetic modes, variety of shapes, applications, and toxicity issues of this fast-growing class of nanomaterials is given.
Abstract: Anisotropic gold nanoparticles (AuNPs) have attracted the interest of scientists for over a century, but research in this field has considerably accelerated since 2000 with the synthesis of numerous 1D, 2D, and 3D shapes as well as hollow AuNP structures. The anisotropy of these nonspherical, hollow, and nanoshell AuNP structures is the source of the plasmon absorption in the visible region as well as in the near-infrared (NIR) region. This NIR absorption is especially sensitive to the AuNP shape and medium and can be shifted towards the part of the NIR region in which living tissue shows minimum absorption. This has led to crucial applications in medical diagnostics and therapy ("theranostics"), especially with Au nanoshells, nanorods, hollow nanospheres, and nanocubes. In addition, Au nanowires (AuNWs) can be synthesized with longitudinal dimensions of several tens of micrometers and can serve as plasmon waveguides for sophisticated optical devices. The application of anisotropic AuNPs has rapidly spread to optical, biomedical, and catalytic areas. In this Review, a brief historical survey is given, followed by a summary of the synthetic modes, variety of shapes, applications, and toxicity issues of this fast-growing class of nanomaterials.

785 citations

Journal ArticleDOI
TL;DR: In this paper, a review of the application of photocatalytic degradation and the antibacterial properties of zinc oxide (ZnO) nanomaterials is reviewed, and the main methods that improve antibacterial activities are coating inorganic or organic antimicrobial agents, doping ZnO, and tuning the size, morphological characteristics, and concentration of ZnOs.

779 citations

Journal ArticleDOI
TL;DR: In this paper, the authors focus on the significant advances in tailored nanostructures of noble metal-metal oxide nanohybrids and highlight the improvement in performance in the representative solar energy conversion applications.
Abstract: The controlled synthesis of nanohybrids composed of noble metals (Au, Ag, Pt and Pd, as well as AuAg alloy) and metal oxides (ZnO, TiO2, Cu2O and CeO2) have received considerable attention for applications in photocatalysis, solar cells, drug delivery, surface enhanced Raman spectroscopy and many other important areas. The overall architecture of nanocomposites is one of the most important factors dictating the physical properties of nanohybrids. Noble metals can be coupled to metal oxides to yield diversified nanostructures, including noble metal decorated-metal oxide nanoparticles (NPs), nanoarrays, noble metal/metal oxide core/shell, noble metal/metal oxide yolk/shell and Janus noble metal–metal oxide nanostructures. In this review, we focus on the significant advances in tailored nanostructures of noble metal–metal oxide nanohybrids. The improvement in performance in the representative solar energy conversion applications including photocatalytic degradation of organic pollutants, photocatalytic hydrogen generation, photocatalytic CO2 reduction, dye-sensitized solar cells (DSSCs) and perovskite solar cells (PSCs) are discussed. Finally, we conclude with a perspective on the future direction and prospects of these controllable nanohybrid materials.

756 citations