Effects of laser-ablated impurity on aligned ZnO nanorods grown by chemical vapor deposition

Hirate, Takashi; Sasaki, Susumu; Li, Weichi; Miyashita, Hiroshi; Kimpara, Takashi; Satoh, Toshifumi

doi:10.1016/j.tsf.2005.01.031

Cited by 53 publications

(29 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition to chemical vapor deposition [5,6,13], chemical bath deposition [14,15] and thermal evaporation methods [16], chemical solution route has also become an alternative for preparing large scale-up ZnO films [7,[17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and optical properties of ZnO nanostructured thin films via mechanical oscillation and hydrothermal method

et al. 2008

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Fabrication and optical properties of ZnO nanostructured thin films via mechanical oscillation and hydrothermal method

et al. 2008

View full text Add to dashboard Cite

“…[17][18][19] Therefore, there has also been significant research into the growth and properties of ZnO nano/microstructures of wires, tubes, belts, and rods. [20,21] The synthesis of nano/microstructures of ZnO has been carried out using various methods, such as evaporation and condensation, [22][23][24][25] physical vapor deposition, [26][27][28] chemical vapor deposition, [29,30] and solvothermal [31] and hydrothermal methods. [32][33][34][35][36] Among them, the hydrothermal method is one of the most attractive candidates for industrial use because industrial processes generally require rapid, low-cost techniques, which are the advantages of the hydrothermal method.…”

mentioning

confidence: 99%

Hydrothermal Growth of Periodic, Single‐Crystal ZnO Microrods and Microtunnels

2006

View full text Add to dashboard Cite

Controlled and extended growth of micro-and nanostructured material systems is becoming increasingly important because of the ever-decreasing dimensions of a variety of devices, including those used for chemical and biological sensing and diagnosis, catalysis, energy conversion and storage, lightemitting displays, and optical storage. There is also significant academic interest in these systems because their properties can be remarkably improved over those of the bulk material due to quantum-sized effects. Beginning with the preparation of oriented carbon nanotubes, [1,2] there has been a dramatic increase in the volume of research into tubular and rodlike nano-and microscale structures for a variety of materials, such as In 1-x Ga x P [3] and MnOOH [4] Zinc oxide has been considered as the most promising candidate material for a wide variety of applications, such as room-temperature UV lasing, [10] transparent conduction electrodes, [11] surface-acoustic-wave devices, [12] and gas sensors, [13,14] because of its unique properties of a wide bandgap (E g = 3.37 eV) [15] with a large exciton binding energy (60 meV) and a large piezoelectric constant.[16] Recent progress in processing and properties of ZnO has been reviewed. [17][18][19] Therefore, there has also been significant research into the growth and properties of ZnO nano/microstructures of wires, tubes, belts, and rods. [20,21] The synthesis of nano/microstructures of ZnO has been carried out using various methods, such as evaporation and condensation, [22][23][24][25] physical vapor deposition, [26][27][28] chemical vapor deposition, [29,30] and solvothermal [31] and hydrothermal methods. [32][33][34][35][36] Among them, the hydrothermal method is one of the most attractive candidates for industrial use because industrial processes generally require rapid, low-cost techniques, which are the advantages of the hydrothermal method. The morphology of ZnO crystals can be controlled by varying growth conditions such as pH, [37] temperature, [38] and adsorbing molecules. [32,39] Nano/micrometer-scale ZnO structures that only have out-of-plane orientation without in-plane orientation with a substrate have been successfully grown.[ [40][41][42] However, the direct fabrication of periodic arrays of nano/micrometer-scale ZnO morphologies as single crystals with inplane and out-of plane epitaxial relations with a substrate have not been achieved yet.It is common to use photolithographic techniques to fabricate patterned periodic arrays of micrometer to sub-micrometer scale features of interesting materials on a substrate. A novel technique called "channel stamping" has also been developed as a soft lithographic alternative to photolithography, where either a metallo-organic precursor solution or a polymer solution is stamped from the channels of a polydimethylsiloxane (PDMS) stamp. Channel stamping has been used to produce micrometer and sub-micrometer scale features. [43,44] Several years ago, Andeen et al. [45] demonstrated that epitaxial ZnO films could be grown ...

show abstract

“…We note that the synthesis of microstructures/nanostructures of ZnO by hydrothermal/chemical method has already proven to be advantageous because of its low cost, freedom from strain and morphology controllable extended area synthesis compared to the other vapour phase methods like evaporation and condensation (Park et al 2003;Zhang et al 2005), physical vapour deposition (Li et al 2004;Kumar et al 2005) and chemical vapour deposition (Kim et al 2004;Hirate et al 2005). In the hydrothermal *Author for correspondence (arup@bose.res.in) method, the morphology of the ZnO crystals can be easily controlled by varying the growth conditions such as growth time (Chander and Raychaudhuri 2006), growth temperature (Chen et al 1999), pH (Lu and Yeh 2000), and absorbing molecules (Cao et al 2004).…”

Section: Introductionmentioning

confidence: 95%

Growth of compact arrays of optical quality single crystalline ZnO nanorods by low temperature method

2008

View full text Add to dashboard Cite

We report the synthesis and optical properties of compact and aligned ZnO nanorod arrays (dia, ~ 50-200 nm) grown on a glass substrate with varying seed particle density. The suspension of ZnO nanoparticles (size, ~ 15 nm) of various concentrations are used as seed layer for the growth of nanorod arrays via selfassembly of ZnO from solution. We studied the effect of various growth parameters (such as seeding density, microstructure of the seed layer) as well as the growth time on the growth and alignment of the nanorods. We find that the growth, areal density and alignment of the nanorods depend on the density of seed particles which can be controlled. It is observed that there is a critical density of the seed particles at which nanorod arrays show maximum preferred orientation along [002] direction. The minimum and maximum radius of the aligned nanorods synthesized by this method lie in the range 50-220 nm which depend on the seeding density and time of growth. These nanorods have a bandgap of 3⋅3 eV as in the case of bulk crystals and show emission in the UV region of the spectrum (~ 400 nm) due to excitonic recombination and defect related emission in the visible region.

show abstract

Effects of laser-ablated impurity on aligned ZnO nanorods grown by chemical vapor deposition

Cited by 53 publications

References 17 publications

Fabrication and optical properties of ZnO nanostructured thin films via mechanical oscillation and hydrothermal method

Fabrication and optical properties of ZnO nanostructured thin films via mechanical oscillation and hydrothermal method

Hydrothermal Growth of Periodic, Single‐Crystal ZnO Microrods and Microtunnels

Growth of compact arrays of optical quality single crystalline ZnO nanorods by low temperature method

Contact Info

Product

Resources

About