Journal article
ZnO Nanowires Grown by Chemical Bath Deposition in a Continuous Flow Microreactor
Crystal growth & design, v 9(10), pp 4538-4545
01 Oct 2009
Abstract
We report on a continuous flow microreactor for chemical bath deposition that enables rapid process characterization. The chemical bath flows through a submillimeter channel and material is deposited on a heated glass/silicon substrate that serves as one reactor wall. The microreactor operates in plug flow; bath composition changes as a function of distance down the reaction channel but the concentration profile is time-invariant. Spatially resolved characterization of the substrate enables rapid and direct correlation of material properties to growth conditions, which is not possible with a batch reactor where bath composition changes with time. We have used this microreactor to grow dense arrays of well-aligned, single-crystal ZnO nanowires. Slow flow rates result in nanowires whose lengths, growth mechanisms, and optical properties vary along the length of the substrate; fast flow rates produce nanowires that are more spatially uniform. Spatially resolved characterization of a single substrate reveals that, along the direction of flow, nanowire lengths decreased, morphology changed from pyramidal tops to flat tops, growth mechanism transitioned from two-dimensional nuclei to spiral growth, and band gap blue-shifted because of compressive strain. The continuous flow microreactor, demonstrated here for ZnO, can also be used to deposit other oxide and chalcogenide nanowires and thin films.
Metrics
Details
- Title
- ZnO Nanowires Grown by Chemical Bath Deposition in a Continuous Flow Microreactor
- Creators
- Kevin M. McPeak - Drexel UniversityJason B. Baxter - Drexel University
- Publication Details
- Crystal growth & design, v 9(10), pp 4538-4545
- Publisher
- American Chemical Society; Washington, DC
- Number of pages
- 8
- Grant note
- Drexel University
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemical and Biological Engineering
- Web of Science ID
- WOS:000270461400051
- Scopus ID
- 2-s2.0-70350221690
- Other Identifier
- 991019168993104721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Multidisciplinary
- Crystallography
- Materials Science, Multidisciplinary