Phonon line emission revealed by self-assembly of colloidal nanoplatelets.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 23458277.
- Also identified by DOI 10.1021/nn400833d.
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Abstract
We show that colloidal nanoplatelets can self-assemble to form a 1D superlattice. When self-assembled, an additional emission line appears in the photoluminescence spectrum at low temperatures. This emission line is a collective effect, greatly enhanced when the NPLs are self-assembled. It is attributed to the longitudinal optical (LO) phonon replica of the band-edge exciton, and its presence in self-assembled nanoplatelets is explained using a model based on an efficient photons reabsorption between neighboring nanoplatelets. The presence of phonon replica at low temperatures in ensemble measurements suggests the possibility to design a laser, based on self-assembled nanoplatelets.
Medical subject headings
- Colloids
- Luminescent Measurements
- Nanostructures