Published September 30, 2014 | Version v1
Journal article Metadata-only

Influence of Cd2+/S2− molar ratio and of different capping environments in the optical properties of CdS nanoparticles incorporated within a hybrid diureasil matrix

Creators

  • 1. Centro de Física – Departamento de Física, Universidade do Minho, 4710-057 Braga (Portugal)
  • 2. Centro de Química – Departamento de Química, Universidade do Minho, 4710-057 Braga (Portugal)
  • 3. School of Chemistry, University of New South Wales, Sydney 2052 (Australia)

Description

Graphical abstract: - Highlights: • Optical properties of the CdS NPs are dependent on the experimental conditions. • Better preservation of original optical properties of NPs when MPTMS is used. • Use of MPTMS is affected by the Cd2+/S2− molar ratio of the CdS NPs. • Cd2+/S2− molar ratio influenced the stability of the CdS NPs within the matrix. • The hybrid intrinsic matrix PL is affected by CdS NPs when MPTMS is used. - Abstract: The incorporation of CdS nanoparticles (NPs), as prepared through colloidal methods using reverse micelles, within diureasil hybrid organic–inorganic sol–gel matrices was investigated. Several experimental conditions, namely the influence of capping agent 3-mercaptopropyltrimethoxysilane (MPTMS) or the use of tetraethoxysilane (TEOS), were studied in order to assure the preservation of the original optical properties of colloidal CdS NPs after the incorporation of the NPs within the solid diureasil hybrid matrix. The diureasil matrix is based on a siliceous network cross linked through urea bonds to poly(oxyethylene)/poly(oxypropylene) (PEO/PPO) chains. The influence of the Cd2+/S2− molar ratio of the NPs in the stability and dispersion of the NPs within the diureasil matrix was also investigated. The obtained CdS doped hybrid matrix was characterized by absorption, steady-state and time-resolved photoluminescence (PL) spectroscopy and by transmission electron microscopy (TEM). The stability of the CdS NPs within the hybrid matrix showed to be dependent on the Cd2+/S2− molar ratio used in the synthesis of the NPs. The use of MPTMS proved to be crucial in the preservation of the original optical properties of the colloidal CdS NPs after the incorporation of the NPs within the hybrid matrix. The effect of MPTMS was in turn influenced by the Cd2+/S2− molar ratio employed in the synthesis of the CdS NPs. The use of MPTMS was less effective when Cd2+/S2− molar ratio equal to 0.5 was used. In the absence of MPTMS or TEOS larger NPs size distribution and clustering of the CdS NPs were obtained after the transfer of the NPs into the hybrid matrix

Availability note (English)

Available from http://dx.doi.org/10.1016/j.apsusc.2014.06.181

Additional details

Identifiers

DOI
10.1016/j.apsusc.2014.06.181;
PII
S0169-4332(14)01499-8;

Publishing Information

Journal Title
Applied Surface Science
Journal Volume
314
Journal Page Range
p. 877-887
ISSN
0169-4332
CODEN
ASUSEE

INIS

Country of Publication
Netherlands
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
46106944
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
ABSORPTION; CADMIUM IONS; CADMIUM SULFIDES; DOPED MATERIALS; GELS; HYBRIDIZATION; NANOPARTICLES; OPTICAL PROPERTIES; PHOTOLUMINESCENCE; PRESERVATION; SPECTROSCOPY; STABILITY; STEADY-STATE CONDITIONS; SURFACES; TIME RESOLUTION; TRANSMISSION ELECTRON MICROSCOPY; UREA
Descriptors DEC
AMIDES; CADMIUM COMPOUNDS; CARBONIC ACID DERIVATIVES; CHALCOGENIDES; CHARGED PARTICLES; COLLOIDS; DISPERSIONS; ELECTRON MICROSCOPY; EMISSION; INORGANIC PHOSPHORS; IONS; LUMINESCENCE; MATERIALS; MICROSCOPY; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; PARTICLES; PHOSPHORS; PHOTON EMISSION; PHYSICAL PROPERTIES; RESOLUTION; SORPTION; SULFIDES; SULFUR COMPOUNDS; TIMING PROPERTIES

Optional Information

Copyright
Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.