Growth and characterization of chemical-vapor-deposited zinc oxide nanorods

Wu, Chin‐Tao; Chang, Li; Chen, Hou Guang; Lin, Chia‐Wen; Chang, Te Fu; Chao, Yen Cheng; Yan, Jhih Kun

doi:10.1016/j.tsf.2005.07.096

Cited by 50 publications

(22 citation statements)

References 16 publications

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“…[23][24][25] We have encountered two main difficulties in studying the Au-ZnO epitaxial relationship, specifically; ͑a͒ the rather large size and consequent opacity to electrons of the ϳ100 nm thick Au dots and ͑b͒ the low fraction of VLS grown ZnO NR with Au droplets. Due to the consequent scarcity of data we must regard the conclusions above as tentative, and work is continuing to fully understand the nature of the epitaxial relationships between Au droplets and VLS grown ZnO NR.…”

Section: Temmentioning

confidence: 99%

Growth of ZnO nanostructures on Au-coated Si: Influence of growth temperature on growth mechanism and morphology

Kumar

McGlynn

Biswas

et al. 2008

Journal of Applied Physics

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ZnO nanostructures were grown on Au-catalyzed Si silicon substrates using vapor phase transport at growth temperatures from 800 to 1150°C. The sample location ensured a low Zn vapor supersaturation during growth. Nanostructures grown at 800 and 850°C showed a faceted rodlike morphology with mainly one-dimensional ͑1D͒ growth along the nanorod axis. Samples grown at intermediate temperatures ͑900, 950, and 1050°C͒ in all cases showed significant three dimensional ͑3D͒ growth at the base of 1D nanostructures. At higher growth temperatures ͑1100 and 1150°C͒ 3D growth tended to dominate resulting in the formation of a porous, nanostructured morphology. In all cases growth was seen only on the Au-coated region. Our results show that the majority of the nanostructures grow via a vapor-solid mechanism at low growth temperatures with no evidence of Au nanoparticles at their tip, in sharp contrast to the morphology expected for the vapor-liquid-solid ͑VLS͒ process often reported as the growth mechanism on Au-catalyzed Si. We see VLS growth only at 900 and 950°C. Transmission electron microscopy data indicate that the nanorods are single crystalline without gross structural defects. Luminescence data reveal strong ultraviolet emission in all samples and weak defect emission in the visible region. We discuss the growth mechanisms with reference to various models in the literature and suggest reasons for VLS growth only in a narrow temperature range. We also discuss the potential effects of the Zn oxidation reaction on the growth morphologies, aspects largely ignored in the general literature on this subject.

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Section: Temmentioning

confidence: 99%

Growth of ZnO nanostructures on Au-coated Si: Influence of growth temperature on growth mechanism and morphology

Kumar

McGlynn

Biswas

et al. 2008

Journal of Applied Physics

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“…However, in attaining the right dimensions and morphologies, a control synthesis procedure for the production of 1D nanoscale ZnO must be sought and optimised. Various methods such as thermal evaporation [10], hydrothermal process [11], microemulsion growth [12], chemical vapor deposition (CVD) [13], and metal-organic CVD [14] have been applied to grow 1D ZnO nanostructures. Nevertheless, most of these methods suffer from two shortcomings: firstly, they require extreme conditions and expensive equipment; and also they are not suitable for controllable synthesis.…”

Section: Introductionmentioning

confidence: 99%

Room temperature anodic deposition and shape control of one-dimensional nanostructured zinc oxide

Sreekantan

Gee

Lockman

2009

Journal of Alloys and Compounds

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“…nanorods, nanowires and nanobelts, become one of the major focuses, and demonstrate potential in various fields, including light emitting diodes (C. H. Liu et al, 2003;Willander et al, 2009), Schottky diode (Nam, Baek, & Park, 2014), field-effect transistor (Schneider et al, 2010), UV sensor (Lai, Wang, Zhao, Fong, & Zhu, 2013), solar cells (Law, Greene, Johnson, Saykally, & Yang, 2005), and photocatalysts (Y. S. Liu, Han, Qiu, & Gao, 2012). Up to now, different experimental techniques have been used for synthesis ZnO nanorods arrays, including, pulsed laser deposition (PLD) (Yu et al, 2008), electrochemical deposition (Guo, Zhou, & Lin, 2008), molecular beam epitaxy (MBE) (Robin et al, 2009), sputtering (Z. , vapor phase transport (VPT) (Li, You, Duan, Shi, & Qin, 2004), thermal evaporation (Ahn, Han, Kong, & Cho, 2009) and chemical vapor deposition (CVD) (Wu et al, 2006). However, these techniques usually require high operation temperature and expensive equipment, which are not compatible with organic substrates for implementations in flexible and wearable electronics.…”

Section: Introductionmentioning

confidence: 99%

The Influence of the Growth Time on the Size and Alignment of Zno Nanorods

Abdulrahman¹,

Ahmed²,

Ahmed³

2017

SJUOZ

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ABSTRACT:Vertically aligned ZnO nanorods arrays were synthesized on glass substrates. ZnO seed layers were prepared on glass substrate by RF Sputtering technique. ZnO nanorods synthesized using low-cost chemical bath deposition method at low temperature (95 ºC). The effect of the different growth time such as (0.5, 1, 2, 3, 4 and 5) h on the morphology, elemental chemical composition and structure of the ZnO nanorods were obtained systemically, and tested by Field emission scanning electron microscopy (FESEM), Energy dispersive analysis (EDX), and XRD measurements. The results found that the ZnO nanorods with hexagonal wurtzite structure grow vertically on the glass substrates. Most of the prepared samples have strong and sharp (002) peak intensities and the diffraction peaks (002) become higher and narrower as growth time increasing, obtaining that the ZnO crystalline quality became better with growth time increasing. The growth rate was decreases with increasing growth time, and the high aspect ratio was found at 4 h as a growth time. The size, length and crystalline size of the ZnO nanorods increase with increasing growth time. Furthermore the ZnO nanorods vertically grow at (002) direction along the c-axis on the glass substrate, with elementary chemical compositions of zinc and oxygen only for all prepared samples.

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Growth and characterization of chemical-vapor-deposited zinc oxide nanorods

Cited by 50 publications

References 16 publications

Growth of ZnO nanostructures on Au-coated Si: Influence of growth temperature on growth mechanism and morphology

Growth of ZnO nanostructures on Au-coated Si: Influence of growth temperature on growth mechanism and morphology

Room temperature anodic deposition and shape control of one-dimensional nanostructured zinc oxide

The Influence of the Growth Time on the Size and Alignment of Zno Nanorods

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