Buffer layer effect on ZnO nanorods growth alignment

Zhao, Dongxu; Andreazza, Caroline; Andreazza, Pascal; Ma, Jiangang; Liu, Yichun; Shen, Dezhen

doi:10.1016/j.cplett.2005.04.038

Cited by 41 publications

(29 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From the FESEM image it is revealed that ZnO seed droplet is present on the top of the NRs. It was reported that the quality and diameters of the ZnO NRs depended on the crystallinity and particle size of the seed layer (Cui et al, 2005;Song & Lim, 2007;Zhao et al, 2005). In our case, the grown NRs are non uniform in diameter and length and also not well aligned due to the non uniform distribution of ZnO seed layer.…”

Section: Self Catalytic Seed Layer Assisted Growthmentioning

confidence: 72%

“…So, for the Au/ZnO/Si substrate the nucleation sites of ZnO NRs have the same orientation as ZnO thin film by the effect of the seed layer. The catalyst layer transfers the orientation from seed layer to NRs leading to a vertically well-aligned growth (Zhao et al, 2005;Giri et al, 2010). In the first step of ZnO NRs growth, a ZnO seed layer was deposited by RF-magnetron sputtering followed by deposition of ultrathin Au layer by DC sputtering.…”

Section: Combined Seed Layer and Gold Catalyst Assisted Growthmentioning

confidence: 99%

“…Zhao et al (Zhao et al, 2005) first used the ZnO buffer layer along with Au catalyst and a well-aligned ZnO NRs is obtained. We also studied the effect of pre-depositing ZnO seed layer on the structure, morphology and optical properties of Au catalytic grown vertically aligned ZnO NRs arrays at different temperatures.…”

Section: Combined Seed Layer and Gold Catalyst Assisted Growthmentioning

confidence: 99%

See 2 more Smart Citations

ZnO Nanorods Arrays and Heterostructures for the High Sensitive UV Photodetection

Dhara¹,

Giri²

2012

Nanorods

View full text Add to dashboard Cite

Section: Self Catalytic Seed Layer Assisted Growthmentioning

confidence: 72%

Section: Combined Seed Layer and Gold Catalyst Assisted Growthmentioning

confidence: 99%

Section: Combined Seed Layer and Gold Catalyst Assisted Growthmentioning

confidence: 99%

See 1 more Smart Citation

ZnO Nanorods Arrays and Heterostructures for the High Sensitive UV Photodetection

Dhara¹,

Giri²

2012

Nanorods

View full text Add to dashboard Cite

“…with the SEM data in Fig. 2 [8,9,18]. SEM data from PLD-grown ZnO nanorods at 30º tilt view is shown in Fig.…”

Section: Surface Morphologiesmentioning

confidence: 99%

“…Many deposition techniques including vapour phase transport (VPT) [5][6][7][8][9], metal-organic chemical vapour deposition (MOCVD) [1,10], hydrothermal deposition [11], pulsed laser deposition (PLD) [12], electrochemical deposition [13], and chemical bath deposition (CBD) [14] have been used to grow vertically aligned ZnO nanorods with good crystalline quality and optical properties.…”

Section: Introductionmentioning

confidence: 99%

Origin of the 3.331 eV emission in ZnO nanorods: Comparison of vapour phase transport and pulsed laser deposition grown nanorods

Inguva

Gray

McGlynn

et al. 2016

Journal of Luminescence

View full text Add to dashboard Cite

*Corresponding authors: saikumar.inguva2@mail.dcu.ie and enda.mcglynn@dcu.ie. KEYWORDSZnO seed layers, vertically aligned ZnO nanorods, vapour phase transport, pulsed laser deposition, 3.331 eV emission. 2 ABSTRACTIn this work, we report the growth of vertically aligned ZnO nanorods with excellent optical quality by both catalyst free vapor phase transport (VPT) and catalyst free pulsed laser deposition (PLD). We compare the near band edge emission of such deposits, with a focus on the identification of the origin of the 3.331 eV emission feature. X-ray diffraction (XRD), scanning electron microscopy (SEM) and low-temperature (13 K) photoluminescence (PL) were used to characterise these nanorod deposits. XRD and SEM data reveal that both techniques lead to highly textured ZnO nanorod arrays with uniform c-axis orientation normal to the substrate surface. The VPT-grown nanorods are well separated and show smooth, facetted surfaces whereas the PLD-grown nanorods are more closely packed and display comparatively rougher surfaces. The optical quality of the samples obtained by both growth methods was very good and low-temperature PL spectra were dominated in both cases by a strong I 6 bound exciton (BX) emission (3.36 eV), and also showed emission from the surface exciton and the free exciton. A comparatively weak visible emission was also observed in samples deposited by both techniques.The main difference between the PLD-and VPT-grown nanorod samples is the presence of the 3.331 eV emission in the former, and its complete absence in the latter (as well as in continuous PLD-grown seed layers) which is discussed in light of the differing surface morphologies mentioned above and which provides strong support for our previous assignment of the origin of this defect to structural defects in the inhomogeneous sub-surface region close to the rough nanorod surface.3

show abstract

Characterization and Field‐Emission Properties of Vertically Aligned ZnO Nanonails and Nanopencils Fabricated by a Modified Thermal‐Evaporation Process

Shen

Bandô

Liu

et al. 2005

Adv Funct Materials

247

179

View full text Add to dashboard Cite

Vertically aligned ZnO nanonails and nanopencils are synthesized on a silicon substrate using a modified thermal‐evaporation process, without using a catalyst or predeposited buffer layers. An adiabatic layer is used to provide an abrupt temperature decrease and high gas concentration for the nanostructures growth. The structure and morphology of the as‐synthesized ZnO nanonails and nanopencils are characterized using X‐ray diffraction, and scanning and transmission electron microscopies. Raman and photoluminescence properties are also investigated at room temperature. Field‐emission characterization shows that the turn‐on fields for the vertically aligned ZnO nanonails and nanopencils are 7.9 and 7.2 V μm–1, respectively.

show abstract

Buffer layer effect on ZnO nanorods growth alignment

Cited by 41 publications

References 14 publications

ZnO Nanorods Arrays and Heterostructures for the High Sensitive UV Photodetection

ZnO Nanorods Arrays and Heterostructures for the High Sensitive UV Photodetection

Origin of the 3.331 eV emission in ZnO nanorods: Comparison of vapour phase transport and pulsed laser deposition grown nanorods

Characterization and Field‐Emission Properties of Vertically Aligned ZnO Nanonails and Nanopencils Fabricated by a Modified Thermal‐Evaporation Process

Contact Info

Product

Resources

About