Time-dependent growth of silica shells on CdTe quantum dots

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081715%3A_____%2F18%3A00491812" target="_blank" >RIV/68081715:_____/18:00491812 - isvavai.cz</a>

Alternative codes found

RIV/00216224:14740/18:00103164 RIV/00216305:26620/18:PU128229

Result on the web

<a href="http://dx.doi.org/10.3390/nano8060439" target="_blank" >http://dx.doi.org/10.3390/nano8060439</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/nano8060439" target="_blank" >10.3390/nano8060439</a>

Result language

angličtina

Original language name

Time-dependent growth of silica shells on CdTe quantum dots

Original language description

The purpose of this study is to investigate the time dependent growth of silica shells on CdTe quantum dots to get their optimum thicknesses for practical applications. The core/shell structured silica-coated CdTe quantum dots (CdTe/SiO2 QDs) were synthesized by the Strober process, which used CdTe QDs co-stabilized by mercaptopropionic acid. The coating procedure used silane primer (3-mercaptopropyltrimethoxysilane) in order to make the quantum dots (QDs) surface vitreophilic. The total size of QDs was dependent on both the time of silica shell growth in the presence of sodium silicate, and on the presence of ethanol during this growth. The size of particles was monitored during the first 72 h using two principally different methods: Dynamic Light Scattering (DLS), and Scanning Electron Microscopy (SEM). The data obtained by both methods were compared and reasons for differences discussed. Without ethanol precipitation, the silica shell thickness grew slowly and increased the nanoparticle total size from approximately 23 nm up to almost 30 nm (DLS data), and up to almost 60 nm (SEM data) in three days. During the same time period but in the presence of ethanol, the size of CdTe/SiO2 QDs increased more significantly: up to 115 nm (DLS data) and up to 83 nm (SEM data). The variances occurring between silica shell thicknesses caused by different methods of silica growth, as well as by different evaluation methods, were discussed.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10406 - Analytical chemistry

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Nanomaterials

ISSN

2079-4991

e-ISSN

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Volume of the periodical

8

Issue of the periodical within the volume

6

Country of publishing house

CH - SWITZERLAND

Number of pages

9

Pages from-to

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UT code for WoS article

000436505200084

EID of the result in the Scopus database

2-s2.0-85048639279