A Comparison of ZnO Nanowires and Nanorods Grown Using MOCVD and Hydrothermal Processes

Rivera, Abdiel; Zeller, John W.; Sood, Ashok K.; Anwar, Mehdi

doi:10.1007/s11664-012-2444-4

Cited by 18 publications

(6 citation statements)

References 33 publications

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“…The synthesis methods of 1D ZnO nanostructures could mainly be classified as vapor phase and solution phase synthesis. The typical vapor phase method includes chemical vapor deposition (CVD) via vapour-liquid-solid (VLS) or vapour-solid (VS) growth mechanism [61], molecular beam epitaxy (MBE) [62], pulsed laser deposition (PLD) [63], metal organic chemical vapor deposition (MOCVD) [64], and metal organic vapor phase epitaxy (MOVPE) [65].…”

Section: Synthesis Of 1d Zno Nanowiresmentioning

confidence: 99%

Using Novel Semiconductor Features to Construct Advanced ZnO Nanowires-Based Ultraviolet Photodetectors: A Brief Review

Xiu-sheng

Liu

et al. 2021

IEEE Access

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Ultraviolet photodetectors have attracted significant research attention in recent years due to their potential applications in civilian and military fields. ZnO nanowires and nanorods have been regarded as the most potential candidates for ultraviolet photodetectors fabrication because of their peculiar characteristics and size effect, which are different from their bulk material. Recently, many novel routes and semiconductor features, such as the surface and interface engineering, the pryo-phototronic effect, the piezo-phototronic effect, the surface plasmon effect and the surface functionalization have been utilized to improve the photoelectric characteristics of ultraviolet photodetectors. Thus, the working mechanism of these effects existing in ZnO nanowires/nanorods-based ultraviolet photodetectors should be investigated in-depth. In this paper, firstly, the hydrothermal method and the chemical vapor deposition method, as two typical synthesis methods of ZnO nanowires are briefly reviewed. Secondly, we focus on reviewing the properties of varied ZnO nanowires/nanorods-based ultraviolet photodetectors constructed using the above mentioned semiconductor features with metal-semiconductor-metal structure, Schottky barrier structure, vertical p-n heterojunction structure and core-shell heterostructure. Furthermore, the most attractive self-powered ultraviolet photodetectors are systematically reviewed. For various ZnO nanowires/nanorods-based ultraviolet photodetectors, we put the emphasis on the working mechanism of semiconductor features to improve the properties of the photodetectors. Finally, we give an outlook on the future development of ZnO nanowires/nanorods-based ultraviolet photodetectors.

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Section: Synthesis Of 1d Zno Nanowiresmentioning

confidence: 99%

Using Novel Semiconductor Features to Construct Advanced ZnO Nanowires-Based Ultraviolet Photodetectors: A Brief Review

Xiu-sheng

Liu

et al. 2021

IEEE Access

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“…Compared with ZnO nanoparticles (NPs), ZnO NRs arrays have obvious advantages in the process of photo-generated carriers transport. At present, the preparation methods of ZnO NRs arrays mainly include chemical vapor deposition (CVD), [14][15][16][17][18][19][20][21][22] microwave method, 23,24 hydrothermal method, [25][26][27][28][29][30][31][32][33][34][35] lowtemperature oxidation method, 36 electrodeposition method, [37][38][39][40][41][42][43][44] and other methods. [45][46][47][48][49][50][51][52][53][54][55][56] However, ZnO as a semiconductor oxide with wide band gap(~3.2 eV), which limits its utilization of light.…”

Section: Introductionmentioning

confidence: 99%

Design strategies of ZnO heterojunction arrays towards effective photovoltaic applications

et al. 2022

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ZnO nanorods (NRs) heterojunction arrays have been widely used in photovoltaic cells owing to the outstanding photoelectrical chracteristics, high stability and low cost. The NRs arrays structure can integrate multiple functional components, so that it can exhibit more excellent physical and chemical properties that even independent components do not possess. The design of heterojunction nanostructures can effectively solve the problems of light absorption and carrier transport. First, the synthesis methods of ZnO NRs and their heterojunction arrays were systematically introduced, including traditional chemical vapor deposition (CVD), electrodeposition, hydrothermal method, and so on, the different structures and properties of ZnO NRs heterojunctions were analyzed. Then, the selected materials could be further processed and assembled into NRs array heterojunction with integrated functions were discussed. The strategies of maximizing energy conversion performance (structure optimization, heterojunction, surface plasmon resonance, and doping) were emphatically summarized. In addition, the research progress of ZnO NRs and their heterojunctions in photoelectric energy conversion system were summarized, and the application potential of combining nanostructure design with solar cells was summarized. Finally, the challenges and future development prospects of ZnO NRs and their heterojunction arrays in photovoltaic conversion were pointed out.

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“…Au nanoparticles (NPs) supported on ZnO are attractive for a wide range of catalytic applications including CO oxidation, − selective hydrogenation of aldehydes, − oxidation of salicylic alcohols, photoelectrochemial water splitting and photocatalytic degradation of dyes. , As a support, ZnO also offers exciting opportunities to tune porosity, optical, chemical, and mechanical properties through the synthesis of tailored ZnO tetrapods and other low-dimensional morphologies. − Au NPs supported on ZnO tetrapods have been shown to provide very high catalytic performance for CO oxidation compared to other catalytic systems. ,, Transmission electron microscopy (TEM) imaging suggests that annealing in the presence of oxygen can lead to the encapsulation of Au NPs by ZnO and a reduction of activity . However, the mechanism behind this effect remains unclear.…”

Section: Introductionmentioning

confidence: 99%

First-Principles Investigation of the Structure and Properties of Au Nanoparticles Supported on ZnO

Hung

McKenna

2019

J. Phys. Chem. C

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We present a first-principles investigation of the structure, stability, and reactivity of Au nanoparticles (NPs) supported on ZnO. The morphologies of supported Au NPs are predicted using the formation energy of Au surfaces and the adhesion energy between Au and the dominant ZnO surfaces exposed on ZnO tetrapods. We show how Zn interstitials (a stable intrinsic defect in ZnO) are attracted toward the Au/ZnO interface and in the presence of oxygen can lead to the encapsulation of Au by ZnO, an effect that is observed experimentally. We find that O 2 molecules absorb preferentially at the perimeter of the NP in contact with the ZnO support. These results provide atomistic insight into the structure of ZnO-supported Au NPs with relevance to CO oxidation.

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A Comparison of ZnO Nanowires and Nanorods Grown Using MOCVD and Hydrothermal Processes

Cited by 18 publications

References 33 publications

Using Novel Semiconductor Features to Construct Advanced ZnO Nanowires-Based Ultraviolet Photodetectors: A Brief Review

Using Novel Semiconductor Features to Construct Advanced ZnO Nanowires-Based Ultraviolet Photodetectors: A Brief Review

Design strategies of ZnO heterojunction arrays towards effective photovoltaic applications

First-Principles Investigation of the Structure and Properties of Au Nanoparticles Supported on ZnO

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