Transformation of Colloidal Quantum Dot: From Intraband Transition to Localized Surface Plasmon Resonance

Extra Form
author Kwang Seob Jeong
Homepage https://kwangsjeong.wixsite.com/ksjlab-koreauniv
journal Nano Letters
?

Shortcut

PrevPrev Article

NextNext Article

ESCClose

+ - Up Down Comment Print

An increase in the carrier density of semiconductor nanocrystals can gradually change the origin of the optical property from the excitonic transition to the localized surface plasmon resonances. Here, we present the evolution of the electronic transition of self-doped Ag2Se colloidal quantum dots, from the intraband transition to the localized surface plasmon resonances along with a splitting of the intraband transition (1Pe–1Se). The minimum fwhm of the split intraband transition is only 23.7 meV, which is exceptionally narrow compared to that of metal oxide nanocrystals showing LSPRs, inferring that the electron–electron scattering is significantly suppressed due to the smaller carrier density. The splitting of the intraband transition mainly results from the asymmetrical crystal structure of the tetragonal Ag2Se CQDs and becomes distinct when the nanocrystal changes its crystal structure from the cubic to tetragonal structure. Maximizing the discrete energy levels in the quantum dot along with mixing with plasmonic characters may provide opportunities to fully harness merits of both the quantum confinement effect and localized surface plasmon resonance characters.

 

TOC-1.jpg

 

 

 

 

 

doi.org/10.1021/acs.nanolett.0c01080

 

최동선.jpg                   손주희.jpg

 Choi Dong-seon                          Son Joo-hee

      (co-first author, Integrated)          (co-first author, master's course)

 


Articles

1 2 3 4 5 6 7 8

Designed by sketchbooks.co.kr / sketchbook5 board skin

나눔글꼴 설치 안내


이 PC에는 나눔글꼴이 설치되어 있지 않습니다.

이 사이트를 나눔글꼴로 보기 위해서는
나눔글꼴을 설치해야 합니다.

설치 Cancel

Sketchbook5, 스케치북5

Sketchbook5, 스케치북5

Sketchbook5, 스케치북5

Sketchbook5, 스케치북5