Influence of Polyethyleneimine and Ammonium on the Growth of ZnO Nanowires by Hydrothermal Method

Chen, Liang‐Yih; Yin, Yu-Tung; Chen, Ching‐Hsiang; Chiou, J. W.

doi:10.1021/jp2056199

Cited by 76 publications

(75 citation statements)

References 52 publications

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“…Chen et al have shown that various defects can be induced in hydrothermally grown ZnO NWs (using ZnO seed layer) by the addition of NH3 molecules during the growth stage [41]. Although the addition of NH4OH is not crucial for the growth of ZnO NWs using ZnO seed layer, for the seedless growth of ZnO NWs on Au surfaces, the addition of NH4OH plays a key role in controlling the number of nucleation sites on Au surface.…”

Section: Resultsmentioning

confidence: 99%

Photoluminescence Study of the Influence of Additive Ammonium Hydroxide in Hydrothermally Grown ZnO Nanowires

Dahiya¹,

Boubenia²,

Franzò³

et al. 2018

Preprint

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We report the influence of ammonium hydroxide (NH4OH), as growth additive, on zinc oxide nanomaterial through the optical response obtained by photoluminescence (PL). A lowtemperature hydrothermal process is employed for the growth of ZnO nanowires (NWs) on seedless Au surface. A more than two order of magnitude change in ZnO NW density is demonstrated via careful addition of NH4OH in the growth solution. Further, we show by systematic experimental study and PL characterization data that the addition of NH4OH can degrade the optical response of ZnO NWs produced. The increase of growth solution basicity with the addition of NH4OH may slowly degrade the optical response of NWs by slowly etching its surfaces, increasing the point defects in ZnO NWs. The present study demonstrates the importance of growth nutrients to obtain quality controlled density tunable ZnO NWs on seedless conducting substrates.

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Section: Resultsmentioning

confidence: 99%

Photoluminescence Study of the Influence of Additive Ammonium Hydroxide in Hydrothermally Grown ZnO Nanowires

Dahiya¹,

Boubenia²,

Franzò³

et al. 2018

Preprint

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show abstract

“…The aim of this study consists both in investigating the effect of the RF power discharge on structural, optical and electrical properties and in understanding the relationships existing between these properties and lattice stoichiometry variation. At this purpose, a detailed structural, electrical and optical characterization has been performed and photoluminescence (PL) technique has been used successfully [17][18][19][20][21] to characterize Al-doped ZnO stoichiometric composition. The excitonic photoluminescence of ZnO:Al is very sensitive to the quality of the crystal and to the presence of defects.…”

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 99%

Effect of the RF sputtering power on microstructural, optical and electrical properties of Al doped ZnO thin films

Spadoni

Addonizio

2015

Thin Solid Films

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“…The structural properties are related to its wurtzite structure (space group P6 3 mc), that allows obtaining varied morphologies of the oxide: colloidal nanoparticles [1], nanostructured colloids [2], nanorods [3][4][5][6], nanowires [7][8][9], and tetrapods [10], thin films [11], among another complex nanostructures [12][13][14]. To obtain these morphologies several methods such as: thermal evaporation [7,10,13], laser ablation [4], hydrothermal synthesis [3,6,8,14], forced hydrolysis [2,12], precipitation [1] and electro-deposition [5,15], are implemented.…”

Section: Introductionmentioning

confidence: 99%

Structural characterization and EXAFS wavelet analysis of Yb doped ZnO by wet chemistry route

Otal

Sileo

Aguirre

et al. 2015

Journal of Alloys and Compounds

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a b s t r a c tLanthanide doped ZnO are interesting materials for optical and electrical applications. The wide band gap of this semiconductor makes it transparent in the visible range (E gap = 3.2 eV), allowing a sharp emission from intra shell transition from the lanthanides. From the electrical side, ZnO is a widely used material in varistors and its electrical properties can be tailored by the inclusion of lanthanides. Both applications are influenced by the location of the lanthanides, grain boundaries or lattice inclusion. Yb doped ZnO samples obtained by wet chemistry route were annealed at different temperatures and characterized by Transmission Electron Microscopy (TEM), X-ray Diffraction (XRD), Rietveld refinement of XRD data, and X-ray Absorption Fine Structure (XAFS). These techniques allowed to follow the changes occurred in the matrix and the Yb environment. The use of the Cauchy continuous wavelet transform allowed identifying a second coordination shell composed of Zn atoms, supporting the observations from XRD Rietveld refinement and XAFS fittings. The information obtained confirmed the incorporation of Yb in O h sites of the wurtzite structure without Yb 2 O 3 clustering in the lattice.

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Influence of Polyethyleneimine and Ammonium on the Growth of ZnO Nanowires by Hydrothermal Method

Cited by 76 publications

References 52 publications

Photoluminescence Study of the Influence of Additive Ammonium Hydroxide in Hydrothermally Grown ZnO Nanowires

Photoluminescence Study of the Influence of Additive Ammonium Hydroxide in Hydrothermally Grown ZnO Nanowires

Effect of the RF sputtering power on microstructural, optical and electrical properties of Al doped ZnO thin films

Structural characterization and EXAFS wavelet analysis of Yb doped ZnO by wet chemistry route

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