Effect of substrate on the structure and optical properties of ZnO nanorods

Nayak, J.; Sahu, S.N.; Kasuya, J; Nozaki, Satoshi

doi:10.1088/0022-3727/41/11/115303

Cited by 26 publications

(19 citation statements)

References 31 publications

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“…Due to a small lattice mismatch, almost perfectly vertically aligned ZnO nanowire arrays can be grown on GaN (n-type [48] and p-type [145][146][147][148][149]), AlN, SiC, Al 2 O 3 , and MgAl 2 O 4 substrates [150], either by hydrothermal decomposition [151] or electrodeposition. In particular, ZnO and GaN have the same wurtzite-type structure with a low lattice mismatch of 1.8% [152], which is much smaller than that (12.7%) with Au(111).…”

Section: N-gan/p-ganmentioning

confidence: 99%

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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Section: N-gan/p-ganmentioning

confidence: 99%

One-dimensional ZnO nanostructures: Solution growth and functional properties

2011

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“…It is also noted that a lower concentration increases the aspect ratio. rods consists of two peaks, one in the UV range and the other in the visible wavelength region [8]. The narrower PL peak at 377 nm is associated with the near bandgap emission, while the broader peak at 580 nm is associated with point defects.…”

Section: Resultsmentioning

confidence: 99%

“…The details of the growth have been described elsewhere [8]. Aqueous solutions of the β-D glucose (β form of dextrose, mol.…”

Section: Methodsmentioning

confidence: 99%

Hydrothermal Growth of Zinc Oxide Nanorods and Glucose-Sensor Application

Nozaki

Sarangi²,

Uchida³

et al. 2013

SNL

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High-quality zinc oxide nanorods were grown on various substrates using zinc nitrate (Zn(NO 3 ) 2 ) and hexamethylenetetramine ((CH 2 ) 6 N 4 ). The substrates greatly affect the hydrothermal growth of ZnO nanorods. Making the best use the substrate effect, we engineered substrates to make a single nanorod in each hole of 100 nm × 100 nm in the array of the holes on the photoresist-patterned substrate. It is also interesting to note that high-quality ZnO nanorods grown on GaN substrates by the hydrothermal growth technique have demonstrated the potential application as a glucose sensor without oxidase for the first time. The photoluminescence in the UV wavelength range was quenched by immobilizing glucose on the ZnO surface. The peak intensity decreased increased with the increased glucose concentrations. A good linearity and high sensitivity were obtained for the glucose concentrations of 0.5 -30 mM in the calibration curve. The calibration curve was not influenced by the presence of bovin serum albumin (BSA), ascorbic acid (AA) and uric acid (UA), which are also included in human blood and could cause interference in estimating glucose concentrations in human blood. The PL quenching was attributed to the H 2 O 2 molecules, which were produced by the photo-oxidation of glucose during exposure to UV light. The PL-quenching glucose sensor made of ZnO nanorods has been evaluated for the first time by estimating the glucose concentrations in the human serum samples which include those of diabetes, and a good correlation was obtained between the concentrations by the PL quenching and the clinical data provided by a local hospital.

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“…On the other hand, it was found that, due to higher rate of nucleation on the Si substrate, the surface density of nucleation centres was very high [26] and incompatibility of the lattice structure between the cubic Si substrate and the hexagonal ZnO. As a result, this led to formation of less-aligned ZnO NWs and randomly oriented on the Si substrate [27]. Moreover, the Si surface readily got oxidized during the nucleation stage of the ZnO growth process via thermal evaporation method, in which these oxides were an amorphous film without crystal orientation [43].…”

Section: Resultsmentioning

confidence: 99%

High-quality ZnO nanowire arrays directly synthesized from Zn vapor deposition without catalyst

Khai¹,

Maneeratanasarn²,

Choi³

et al. 2011

Journal of the Korean Crystal Growth and Crystal Technology

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Vertically well-aligned ZnO nanowire (NW) arrays were synthesized directly on GaN/sapphire and Si substrate from Zn vapor deposition without catalysts. Experimental results showed that the number density, diameter, crystallinity and degree of the alignment of ZnO NWs depended strongly on both the substrate position and kind of the substrates used for the growth. The photoluminescence (PL) characteristics of the grown ZnO NW arrays exhibit a strong and sharp ultraviolet (UV) emission at 379 nm and a broad weak emission in the visible range, indicating that the obtained ZnO NWs have a high crystal quality with excellent optical properties. The as-grown ZnO NWs were characterized by using scanning electron microscopy (SEM), high resolution transmission electronic microscopy (HR-TEM), and X-ray diffraction (XRD).

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Effect of substrate on the structure and optical properties of ZnO nanorods

Cited by 26 publications

References 31 publications

One-dimensional ZnO nanostructures: Solution growth and functional properties

One-dimensional ZnO nanostructures: Solution growth and functional properties

Hydrothermal Growth of Zinc Oxide Nanorods and Glucose-Sensor Application

High-quality ZnO nanowire arrays directly synthesized from Zn vapor deposition without catalyst

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