Semiconductor quantum dots (QDs) exhibit remarkable photostability, large absorption spectra, tunable emission peaks, and high quantum yields. These features originate from their lowdimensionality. It is necessary to control the shape of QDs because their specific characteristics are normally determined by their particular shape and size. We employed first-principle calculations to identify the optimal structures of CdSe quantum dots and investigated the shape-determining mechanism governing the formation of low-dimensional nanomaterials. The anisotropy of surface energy is a key factor determining the shape of nanomaterials and we suggest how to control their geometry and characteristics by adjusting the surface energy.
Bibliographical noteFunding Information:
This work was supported by the Industrial Fundamental Technology Development Program (10063268) funded by the Ministry of Trade, Industry & Energy (MOTIE) of Korea.
© 2018, The Korean Physical Society.
- First principle calculation
- Quantum dot
- Shape effect
- Surface energy
ASJC Scopus subject areas
- General Physics and Astronomy