Surface Effect Induced Optical Bandgap Shrinkage in GaN Nanotubes
Cited 0 times inCited 0 times in
- Surface Effect Induced Optical Bandgap Shrinkage in GaN Nanotubes
- Park, Youngsin; Lee, Geunsik; Holmes, Mark J.; Chan, Christopher C. S.; Reid, Benjamin P. L.; Alexander-Webber, Jack A.; Nicholas, Robin J.; Taylor, Robert A.; Kim, Kwang S.; Han, Sang W.; Yang, Woochul; Jo, Y; Kim, J; Im, Hyunsik
- Issue Date
- AMER CHEMICAL SOC
- NANO LETTERS, v.15, no.7, pp.4472 - 4476
- We investigate nontrivial surface effects on the optical properties of self-assembled crystalline GaN nanotubes grown on Si substrates. The excitonic emission is observed to redshift by ∼100 meV with respect to that of bulk GaN. We find that the conduction band edge is mainly dominated by surface atoms, and that a larger number of surface atoms for the tube is likely to increase the bandwidth, thus reducing the optical bandgap. The experimental findings can have important impacts in the understanding of the role of surfaces in nanostructured semiconductors with an enhanced surface/volume ratio.
- Appears in Collections:
- CHM_Journal Papers
- Files in This Item:
- There are no files associated with this item.
can give you direct access to the published full text of this article. (UNISTARs only)
Show full item record
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.