Chemical kinetics and mass transport effects in solution-based selective-area growth of ZnO nanorods

Coltrin, Michael E.; Hsu, Julia W. P.; Scrymgeour, David; Creighton, J. R.; Simmons, Neil C.; Matzke, Carolyn M.

doi:10.1016/j.jcrysgro.2007.11.030

Cited by 25 publications

(22 citation statements)

References 19 publications

(22 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The wavelength of the UV light, however, is normally hundreds of nanometers, and therefore the feature size of the pattern is limited to the micrometer range, which gives rise to very dense nanowire arrays growing out of one spot on seeded substrates [77,99]. On a patterned substrate, the growth rate of the nanowires was shown to be inversely proportional to the nanowire density [267,268], simply because the growth nutrient was shared between the competing nanowires. Also, the as-grown nanowires were not straight or uniformly oriented on seeded substrate [77], even though well-controlled ZnO nanowire arrays were grown on GaN substrates using photolithography with one or two nanowires growing out of one spot [269].…”

Section: Photolithographymentioning

confidence: 99%

One-dimensional ZnO nanostructures: Solution growth and functional properties

2011

View full text Add to dashboard Cite

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.

show abstract

Section: Photolithographymentioning

confidence: 99%

One-dimensional ZnO nanostructures: Solution growth and functional properties

2011

View full text Add to dashboard Cite

show abstract

“…10,11 Coltrin et al have developed a two-dimensional model of the growth of ZnO nanowires on patterned silver substrates that took into account the mass transport of reactants to the substrate surface, the reaction and diffusion of the ZnO precursor at the nanowire surface and the desorption of hydrogen from the surface of the nanowires. 12 From their model and experiments they concluded that the rate limiting step in the nanowire growth is the desorption of hydrogen from the nanowire surface.…”

Section: Introductionmentioning

confidence: 99%

Transport Limited Growth of Zinc Oxide Nanowires

Boercker

Schmidt

Aydil

2009

Crystal Growth & Design

View full text Add to dashboard Cite

Vertical arrays of crystalline zinc oxide (ZnO) nanowires grown on various substrates find applications in dyesensitized and hybrid organic/inorganic bulk-heterojunction solar cells. The ability to grow dense nanowires at high rates and the fundamental understanding of the growth process are important for these applications. Herein, we show that heterogeneous growth of ZnO nanowires on substrates seeded with ZnO nanoparticles in an aqueous solution of methenamine and zinc nitrate is mass transport limited. Mass transport limited growth leads to an inverse relationship between the nanowire dimensions (height and diameter) and the nanowire number density. This mass transport limitation also leads to nonuniform growth near the boundaries between seeded and unseeded regions. Stirring the reaction solution increases the nanowire growth rate. Experimental results were interpreted within the framework of two simple but nontrivial models of the solution phase species transport and the nanowire growth. Additionally, it was determined that the anisotropic growth is due to the intrinsic growth kinetics of the (101 j 0) and (0001) surfaces of ZnO in zinc nitrate and methenamine and not due to the growth process being mass transport limited as previously suggested.

show abstract

“…Increasingly complex structures can evolve from using principles of self-organization in a bottom-up approach rather than from lithography-based topdown approaches. The key issue for intelligent self-assembly of complex structures is the design of local geometrically selec-tive and site-selective interactions on the nanometer scale [3][4][5][6]. The more selective the interaction between the individual assembled components, the higher the complexity of the resulting structures that can be achieved.…”

Section: Introductionmentioning

confidence: 99%

Template-controlled mineralization: Determining film granularity and structure by surface functionality patterns

Blumenstein¹,

Berson²,

Walheim³

et al. 2016

Nano Online

View full text Add to dashboard Cite

We present a promising first example towards controlling the properties of a self-assembling mineral film by means of the functionality and polarity of a substrate template. In the presented case, a zinc oxide film is deposited by chemical bath deposition on a nearly topography-free template structure composed of a pattern of two self-assembled monolayers with different chemical functionality. We demonstrate the template-modulated morphological properties of the growing film, as the surface functionality dictates the granularity of the growing film. This, in turn, is a key property influencing other film properties such as conductivity, piezoelectric activity and the mechanical properties. A very pronounced contrast is observed between areas with an underlying fluorinated, low energy template surface, showing a much more (almost two orders of magnitude) coarse-grained film with a typical agglomerate size of around 75 nm. In contrast, amino-functionalized surface areas induce the growth of a very smooth, fine-grained surface with a roughness of around 1 nm. The observed influence of the template on the resulting clear contrast in morphology of the growing film could be explained by a contrast in surface adhesion energies and surface diffusion rates of the nanoparticles, which nucleate in solution and subsequently deposit on the functionalized substrate.1763

show abstract

Chemical kinetics and mass transport effects in solution-based selective-area growth of ZnO nanorods

Cited by 25 publications

References 19 publications

One-dimensional ZnO nanostructures: Solution growth and functional properties

One-dimensional ZnO nanostructures: Solution growth and functional properties

Transport Limited Growth of Zinc Oxide Nanowires

Template-controlled mineralization: Determining film granularity and structure by surface functionality patterns

Contact Info

Product

Resources

About