Hydrothermal synthesis of ZnO nanorod arrays with the addition of polyethyleneimine

Zhou, Ying; Wu, Weibing; Hu, Guangda; Wu, Haitao; Cui, Shougang

doi:10.1016/j.materresbull.2007.09.024

Cited by 102 publications

(67 citation statements)

References 14 publications

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“…We should reduce diameters and increment length of Zno nanowire to achievelarge internal surface area of the ZnO nanostructure in a highly effective agent to improve the separation of electrical charges in semiconductor devices 23 . In conventional hydrothermal method we cannot achieve such structure.…”

Section: Resultsmentioning

confidence: 99%

Efficiency Investigation of Dye-Sensitized Solar Cells Based on the Zinc Oxide Nanowires

Ahmad¹,

Tabatabaei²

2014

Orient. J. Chem

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In this paper, we synthesized ZnO nanowires in dye sensitized solar cells. The nanowires have been fabricated using fast-microwave-hydrothermal process.We verify the effects of different lengths of ZnO nanowires on efficiency and absorptionofdye sensitized solar cells. J-V curves of the fabricated ZnO nanowire-based mercurochrome-sensitized solar cells indicated that the shortcircuit current density would increase with increasing the length of nanowires.We also fabricate more efficient N719-sensitized solar cellsand investigate the effect of different length of Zno nanowires on the efficiency.

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Section: Resultsmentioning

confidence: 99%

Efficiency Investigation of Dye-Sensitized Solar Cells Based on the Zinc Oxide Nanowires

Ahmad¹,

Tabatabaei²

2014

Orient. J. Chem

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“…(c) φ-scan profiles of the ZnO nanowires/GaN/c-sapphire structure with the family of planes of ZnO nanowires on the top, and the GaN film at the bottom [153]. Reproduced with permission side surfaces and enhance the vertical growth, such as amines like polyethylenimine (PEI) [18,155,156] and ethylenediamine [67,137]; those that cap onto the basal plane of the ZnO nanostructures and promote lateral growth, such as Cl - [124] and C 3 H 5 O(COO) 3 3− (citrate ions) [150,157,158]. The isoelectric point of ZnO powder is at around pH = 9.5 [54].…”

Section: Capping Agent-assisted Growthmentioning

confidence: 99%

“…Other than their capping behavior, PEI additives also help to grow longer nanowires by extending the growth time [156], as shown in Fig. 11(b).…”

Section: Capping Agent-assisted Growthmentioning

confidence: 99%

“…Also after the growth, less precipitate was expected to form in the bulk solution in the presence of PEI coordination than without PEI. Thus, longer nanowire arrays could be produced through prolonging the growth time without refreshing the growth solution, because the Zn 2+ depleted during the growth would be replenished through the decomposition of PEI-Zn 2+ complexes [156]. Citrate ions are characterized by three negative charges under the normal growth environment.…”

Section: Capping Agent-assisted Growthmentioning

confidence: 99%

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One-dimensional ZnO nanostructures: Solution growth and functional properties

2011

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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, positioncontrolled growth on substrates, and finally, their functional properties as catalysts, hydrophobic surfaces, sensors, and in nanoelectronic, optical, optoelectronic, and energy harvesting devices.

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“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] 그러나, 벌크재 료의 UV 여기발광(UV stimulated emission) 및 레이저 특성은 저온에서 관찰되므로, 상온에서 UV 여기발광특 성을 관찰하기 위해서는 크기효과(size effect)에 따른 양 자구속효과(quantum confinement effect)를 가질 수 있는 1차원 나노구조가 요구된다. …”

Section: 서 론unclassified

Growth and UV Emission of Preferred Oriented ZnO Nanowires Using Hydrothermal Process

Kim¹,

Lim²,

Kim³

et al. 2011

Korean. J. Mater. Res.

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1-D ZnO nanowires have been attractive for their peculiar properties and easy growth at relatively low temperature. The length, diameter, and density of ZnO nanowires were determined by the several synthetic parameters, such as PEI concentration, growth time, temperature, and zinc salt concentration. The ZnO nanowires were grown on the <001> oriented seed layer using the hydrothermal process with zinc nitrate and HMTA (hexamethylenetetramine) and their structure and optical properties were characterized. The morphology, length and diameter of the nanowires were strongly affected by the relative and/ or absolute concentration of Zn 2+ and OH −1 and the hydrothermal temperature. When the concentrations of the zinc nitrate HMTA were the same as 0.015 M, the length and diameter of the nanowires were 1.97 µm and 0.07 µm, respectively, and the aspect ratio was 28.1 with the preferred orientation along the <001> direction. XRD and TEM results showed a high crystallinity of the ZnO nanowires. Optical measurement revealed that ZnO nanowires emitted intensive stimulated UV at 376 nm without showing visible emission related to oxygen defects.

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Hydrothermal synthesis of ZnO nanorod arrays with the addition of polyethyleneimine

Cited by 102 publications

References 14 publications

Efficiency Investigation of Dye-Sensitized Solar Cells Based on the Zinc Oxide Nanowires

Efficiency Investigation of Dye-Sensitized Solar Cells Based on the Zinc Oxide Nanowires

One-dimensional ZnO nanostructures: Solution growth and functional properties

Growth and UV Emission of Preferred Oriented ZnO Nanowires Using Hydrothermal Process

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