Controlled selective growth of ZnO nanorod arrays and their field emission properties

Ahsanulhaq, Q.; Kim, Jin Hwan; Hahn, Yoon‐Bong

doi:10.1088/0957-4484/18/48/485307

Cited by 108 publications

(85 citation statements)

References 39 publications

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“…In Figure 1 Other parameters, such as temperature growth and precursor concentration, are very likely to play a role as well (15,16) and further research is necessary to fully understand their influence. In our study, we did not observe any remarkable variation in the crystal growth by varying the oven temperature between 80 and 90 °C, very likely because of the synthesis being run mostly overnight and, in any case, for more than 6 h, therefore leveling the effect of temperature on the synthesis growth rate.…”

Section: Resultsmentioning

confidence: 99%

From Stems (and Stars) to Roses: Shape-Controlled Synthesis of Zinc Oxide Crystals

Palumbo

Lutz

Giusca

et al. 2009

Crystal Growth & Design

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A novel, scalable, solution-based method suitable for the control of ZnO crystal morphology at moderate temperature from rods/stars to rose-shaped, flowerlike structures is presented here. The synthesized ZnO roselike crystals are composed by wide nanosheets folded several times on themselves. This study represents the first step toward the full understanding of the growth mechanism that led to the formation of such a structure. It is now widely acknowledged that both size and shape of the metal oxide crystals have a profound effect on their properties. The influence that two morphology directing agents, ammonia and citric acid trisodium salt dihydrate, have on the shape-controlled synthesis is illustrated. The analysis of various possible mechanisms and forces that might contribute to the roselike crystals formation, such as the influence of polar surfaces, is discussed. The chemical composition and work function of the ZnO roses is investigated via XPS and UPS. XRD analysis suggests wurtzite as the most likely crystal structure for both the ZnO stars and roses, albeit these latter have a more elusive diffractogram because of their folded configuration. PL data suggest a lower level of interstitial oxygen for both crystals synthesized, starlike and flowerlike. Analysis of the ratio of the emission in the Blue range upon the ultraviolet emission indicates that the ZnO stars are slightly more conductive than the ZnO roses, a factor associated with the lower native defect concentration in these latter structures.

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Section: Resultsmentioning

confidence: 99%

From Stems (and Stars) to Roses: Shape-Controlled Synthesis of Zinc Oxide Crystals

Palumbo

Lutz

Giusca

et al. 2009

Crystal Growth & Design

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show abstract

“…In particular, ZnO nanowires and nanorods grown by vapor deposition techniques and solution-based methods have attracted interest because of their possible applications in optoelectronic devices such as light-emitting diodes, transparent field-effect transistors, UV light detectors, and solar cells. The fabrication of nanoscale devices has become the focus of intensive research in the area of photonics [12][13][14][15][16][17][18][19][20][21][22]. ZnO nanowires grown on Si substrates are well suited for the development of such optoelectronic devices.…”

Section: Intoroductionmentioning

confidence: 99%

Effect of Ga-doping on the properties of ZnO nanowire

Ishiyama¹,

Nakane²,

Fujii

2015

AIP Conference Proceedings

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“…Thus, instead of randomly placing nanowires or nanorods on a substrate, a more desirable method would be appreciated to selectively grow and pattern nanostructures directly onto electrodes or other wanted areas of the substrate. Details of solutionbased growth methods are available elsewhere [60,72]. As shown in Fig.…”

Section: Four-probe Electrode System Based On Zno Nanorod Arrays Dirementioning

confidence: 99%

Zinc oxide nanostructures and their applications

Hahn

2011

Korean J. Chem. Eng.

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138

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Zinc oxide (ZnO) has been known as the next most important material for the fabrication of efficient nanodevices and nanosystems because of its versatile properties such as semiconducting, piezoelectric, and pyroelectric multiple properties. In this review, the state-of-the-art technologies related to the synthesis and characterization, the selective growth of ZnO nanostructures, and their applications for nanodevices are discussed. A special concern is focused on the controlled selective growth of ZnO nanostructures on wanted areas of substrates, which is crucial factor for devices applications. The device applications of ZnO nanostructures include field effect transistors (FETs), fieldemission devices, piezoelectric nanogenerators, biosensors, p-n heterjunction diodes such as light-emitting diodes and photovoltaic cells, and so on.

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Controlled selective growth of ZnO nanorod arrays and their field emission properties

Cited by 108 publications

References 39 publications

From Stems (and Stars) to Roses: Shape-Controlled Synthesis of Zinc Oxide Crystals

From Stems (and Stars) to Roses: Shape-Controlled Synthesis of Zinc Oxide Crystals

Effect of Ga-doping on the properties of ZnO nanowire

Zinc oxide nanostructures and their applications

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