Publication detail

CdTe quantum dots: Time-dependent growth of silica shell

MODLITBOVÁ, P. KLEPÁRNÍK, K. FARKA, Z. POŘÍZKA, P. NOVOTNÝ, K. KAISER, J.

Original Title

CdTe quantum dots: Time-dependent growth of silica shell

Type

abstract

Language

English

Original Abstract

In this work, we demonstrate the growth of amorphous silica shell onto as-synthesized water-soluble cadmium telluride QDs capped by 2-mercaptopropionic acid (CdTe MPA QDs). The main purpose was to prepare CdTe/SiO2 QDs while observing and comparing the growth of the shell during ethanolic and non-ethanolic precipitation. QDs with and without silica shells and QD aliquots during shell growth have been characterized in detail by several spectroscopy and microscopy techniques: Dynamic Light Scattering (DLS), Atomic Force Microscope (AFM), Transmission Electron Microscope (TEM), and by UV-VIS spectrophotometer. The mechanisms of shell formation are discussed. Silanization, as well as precipitation, are time-dependent, i.e. duration of these processes significantly influences the thickness of the silica shell. The results obtained represent supporting information for data published so far and create opportunities to formulate new hypotheses to research.

Keywords

quantum dots, silanization, silica shell, CdTe

Authors

MODLITBOVÁ, P.; KLEPÁRNÍK, K.; FARKA, Z.; POŘÍZKA, P.; NOVOTNÝ, K.; KAISER, J.

Released

17. 4. 2018

BibTex

@misc{BUT151848,
  author="MODLITBOVÁ, P. and KLEPÁRNÍK, K. and FARKA, Z. and POŘÍZKA, P. and NOVOTNÝ, K. and KAISER, J.",
  title="CdTe quantum dots: Time-dependent growth of silica shell",
  year="2018",
  note="abstract"
}