Surfactant-mediated variation of band-edge emission in CdS nanocomposites

C. O'Dwyer; V. Lavayen; N. Mirabal; M. A. Santa Ana; E. Benavente; S. Ormazabal; G. González; Z. Lopez; O. Schöps; U. Woggon; C. M. Sotomayor Torres

doi:10.1016/j.photonics.2007.07.011

Surfactant-mediated variation of band-edge emission in CdS nanocomposites

C. O'Dwyer
, V. Lavayen
, N. Mirabal
, M. A. Santa Ana
, E. Benavente
, S. Ormazabal
, G. González
, Z. Lopez
, O. Schöps
, U. Woggon
, C. M. Sotomayor Torres

School of Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

The optical-structural characteristics of the direct optical band-gap semiconducting series of surfactant template-mediated laminar (CdS)_x(CdCl₂)_y(C_nH_2n+4N)_z nanocomposites are reported. X-ray diffraction measurements of the nanocomposites exhibited interlaminar distances in the range 2.9-3.6 nm with observations of eighth order {0 0 l} diffraction planes indicative of a high degree of laminarity and crystallographic order. Diffuse reflectance measurements have determined that the profile of their emission spectrum is that of a direct band-gap with absorption edges in the range 2.11-2.40 eV, depending on the CdS mole fraction in the nanocomposite. Photoluminescence (PL) excitation and time-resolved PL spectroscopies give an estimate of the maximum relative absorbance of the nanocomposites at ∼420 nm while the minimum was observed at ∼560 nm. The main emission was observed at ∼700 nm with emission from doubly ionized sulphur vacancies observed at ∼615 nm at room temperature. The CdS-containing nanocomposite is thus a surfactant-mediated modular system with variable band-gap energy emission.

Original language	English
Pages (from-to)	45-52
Number of pages	8
Journal	Photonics and Nanostructures - Fundamentals and Applications
Volume	5
Issue number	2-3
DOIs	https://doi.org/10.1016/j.photonics.2007.07.011
Publication status	Published - Oct 2007

Keywords

Cadmium sulphide
Nanostructures
Optical properties
Photoluminescence
Scanning electron microscopy

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10.1016/j.photonics.2007.07.011

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O'Dwyer, C., Lavayen, V., Mirabal, N., Santa Ana, M. A., Benavente, E., Ormazabal, S., González, G., Lopez, Z., Schöps, O., Woggon, U., & Sotomayor Torres, C. M. (2007). Surfactant-mediated variation of band-edge emission in CdS nanocomposites. Photonics and Nanostructures - Fundamentals and Applications, 5(2-3), 45-52. https://doi.org/10.1016/j.photonics.2007.07.011

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title = "Surfactant-mediated variation of band-edge emission in CdS nanocomposites",

abstract = "The optical-structural characteristics of the direct optical band-gap semiconducting series of surfactant template-mediated laminar (CdS)x(CdCl2)y(CnH2n+4N)z nanocomposites are reported. X-ray diffraction measurements of the nanocomposites exhibited interlaminar distances in the range 2.9-3.6 nm with observations of eighth order \{0 0 l\} diffraction planes indicative of a high degree of laminarity and crystallographic order. Diffuse reflectance measurements have determined that the profile of their emission spectrum is that of a direct band-gap with absorption edges in the range 2.11-2.40 eV, depending on the CdS mole fraction in the nanocomposite. Photoluminescence (PL) excitation and time-resolved PL spectroscopies give an estimate of the maximum relative absorbance of the nanocomposites at ∼420 nm while the minimum was observed at ∼560 nm. The main emission was observed at ∼700 nm with emission from doubly ionized sulphur vacancies observed at ∼615 nm at room temperature. The CdS-containing nanocomposite is thus a surfactant-mediated modular system with variable band-gap energy emission.",

keywords = "Cadmium sulphide, Nanostructures, Optical properties, Photoluminescence, Scanning electron microscopy",

author = "C. O'Dwyer and V. Lavayen and N. Mirabal and \{Santa Ana\}, \{M. A.\} and E. Benavente and S. Ormazabal and G. Gonz{\'a}lez and Z. Lopez and O. Sch{\"o}ps and U. Woggon and \{Sotomayor Torres\}, \{C. M.\}",

year = "2007",

month = oct,

doi = "10.1016/j.photonics.2007.07.011",

language = "English",

volume = "5",

pages = "45--52",

journal = "Photonics and Nanostructures - Fundamentals and Applications",

issn = "1569-4410",

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number = "2-3",

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TY - JOUR

T1 - Surfactant-mediated variation of band-edge emission in CdS nanocomposites

AU - O'Dwyer, C.

AU - Lavayen, V.

AU - Mirabal, N.

AU - Santa Ana, M. A.

AU - Benavente, E.

AU - Ormazabal, S.

AU - González, G.

AU - Lopez, Z.

AU - Schöps, O.

AU - Woggon, U.

AU - Sotomayor Torres, C. M.

PY - 2007/10

Y1 - 2007/10

N2 - The optical-structural characteristics of the direct optical band-gap semiconducting series of surfactant template-mediated laminar (CdS)x(CdCl2)y(CnH2n+4N)z nanocomposites are reported. X-ray diffraction measurements of the nanocomposites exhibited interlaminar distances in the range 2.9-3.6 nm with observations of eighth order {0 0 l} diffraction planes indicative of a high degree of laminarity and crystallographic order. Diffuse reflectance measurements have determined that the profile of their emission spectrum is that of a direct band-gap with absorption edges in the range 2.11-2.40 eV, depending on the CdS mole fraction in the nanocomposite. Photoluminescence (PL) excitation and time-resolved PL spectroscopies give an estimate of the maximum relative absorbance of the nanocomposites at ∼420 nm while the minimum was observed at ∼560 nm. The main emission was observed at ∼700 nm with emission from doubly ionized sulphur vacancies observed at ∼615 nm at room temperature. The CdS-containing nanocomposite is thus a surfactant-mediated modular system with variable band-gap energy emission.

AB - The optical-structural characteristics of the direct optical band-gap semiconducting series of surfactant template-mediated laminar (CdS)x(CdCl2)y(CnH2n+4N)z nanocomposites are reported. X-ray diffraction measurements of the nanocomposites exhibited interlaminar distances in the range 2.9-3.6 nm with observations of eighth order {0 0 l} diffraction planes indicative of a high degree of laminarity and crystallographic order. Diffuse reflectance measurements have determined that the profile of their emission spectrum is that of a direct band-gap with absorption edges in the range 2.11-2.40 eV, depending on the CdS mole fraction in the nanocomposite. Photoluminescence (PL) excitation and time-resolved PL spectroscopies give an estimate of the maximum relative absorbance of the nanocomposites at ∼420 nm while the minimum was observed at ∼560 nm. The main emission was observed at ∼700 nm with emission from doubly ionized sulphur vacancies observed at ∼615 nm at room temperature. The CdS-containing nanocomposite is thus a surfactant-mediated modular system with variable band-gap energy emission.

KW - Cadmium sulphide

KW - Nanostructures

KW - Optical properties

KW - Photoluminescence

KW - Scanning electron microscopy

UR - https://www.scopus.com/pages/publications/34748829372

U2 - 10.1016/j.photonics.2007.07.011

DO - 10.1016/j.photonics.2007.07.011

M3 - Article

AN - SCOPUS:34748829372

SN - 1569-4410

VL - 5

SP - 45

EP - 52

JO - Photonics and Nanostructures - Fundamentals and Applications

JF - Photonics and Nanostructures - Fundamentals and Applications

IS - 2-3

ER -

Surfactant-mediated variation of band-edge emission in CdS nanocomposites

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Keywords

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