Paper Titles
Cu(In,Ga)Se2 Prepared by a 2 and 3-Stage Hybrid RF-Magnetron Sputtering and Se Evaporation Method: Properties and Solar Cell Performance
p.93
Push-Pull Tricyanovinyl-Substituted Thienylpyrroles: Synthesis, Solvatochromic and Electrochemical Properties
p.98
Donor-Acceptor Substituted Thienylpyrrole Azo Dyes: Synthesis, Solvatochromic and Electrochemical Properties
p.103
Organically Modified Silica-Based Xerogels Derived from 3-Aminopropyltrimethoxysilane and 3-Isocyanatepropyltriethoxysilane through Carboxylic Acid Solvolysis
p.108
Photoluminescence of Di-Ureasil Hybrids Doped with Silica Coated Ag Nanoparticles
p.113
Photoluminescence Changes Induced by Self-Organisation in Bridged Silsesquioxanes
p.118
Preparation of Photoluminescent Materials from a Lanthanide-Doped Microporous Titanosilicate Precursor
p.123
Photoluminescence of Nanocrystalline Bismuth Titanate Thin Films Synthesized by the Sol-Gel Method
p.128
EPR and TEM Characterization of Electroluminescent Alq3
p.133

Photoluminescence of Di-Ureasil Hybrids Doped with Silica Coated Ag Nanoparticles

Article Preview

Abstract:

Photoluminescence of di-ureasil hybrids containing homogeneously dispersed Ag nanoparticles, covered with silica shells was investigated at room temperature and compared with emission of undoped hybrids. Metal-doped di-ureasils show a broad emission band in the blue spectral region similar to what has been observed in pure di-ureasils but with lower relative intensity. A broad minimum arises around 438 nm for Ag@SiO2 - containing di-ureasils which coincides with the peak of plasmon resonance band in the absorption spectrum. This behaviour can be attributed to inner filtering effect, which manifests itself as absorption by metal nanoparticles of light emitted from the matrix. Low-temperature time-resolved spectroscopy and lifetime measurements demonstrate that changes are induced in the time-scale behind the di-ureasil host emission when the nanoparticles are incorporated. In particular, the lifetime values for Ag@SiO2- doped di-ureasils are smaller than those measured for the undoped host, suggesting that energy transfer might exist between the hybrid's emitting centres (NH groups and siliceous nanodomains) and the nanoparticles.

You might also be interested in these eBooks
Advanced Materials Forum III View Preview

Info:

Periodical:

Materials Science Forum (Volumes 514-516)

Pages:

113-117

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.514-516.113

Citation:

Cite this paper

Online since:

May 2006

Authors:

Victor I. Boev, Rute A. Sá Ferreira, Sonia S. Nobre, Carlos J.R. Silva, M.J.M. Gomes, Luís M. Liz-Marzán, Luís D. Carlos

Keywords:

Di-Ureasil, Metal Nanoparticle, Photoluminescence (PL), Sol-Gel Process

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2006 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

References

[1] M. Armand, C. Poinsignon, J. Y. Sanchez and V. Z. Bermudez: U.S. Patent 5283310 (1994).

Google Scholar

[2] V. Z. Bermudez, L. D. Carlos, M. C. Duarte, M. M. Silva, C. J. R. Silva, M. J. Smith, M. Assunção and L. Alcácer: J. Alloys and Compounds Vol. 21 (1998), p.275.

DOI: 10.1016/s0925-8388(98)00266-7

Google Scholar

[3] E. Stathatos, P. Lianos, U. Lavrenic-Stangar and B. Orel: Adv. Mater. Vol. 14 (2002), p.354.

Google Scholar

[4] L.D. Carlos, Y. Messaddeq, H. F. Brito, R. A. Sá Ferreira, V. de Zea Bermudez and S. J. Ribeiro: Adv. Mater. Vol. 12 (2000), p.594.

DOI: 10.1002/(sici)1521-4095(200004)12:8<594::aid-adma594>3.0.co;2-s

Google Scholar

[5] V. I. Boev, J. Pérez-Juste, I. Pastoriza-Santos, C. J. R. Silva, M. J. M. Gomes and L. M. LizMarzán: Langmuir, Vol. 20 (2004), p.10268.

Google Scholar

[6] V. I. Boev, A. Soloviev, C. J. R. Silva and M. J. M. Gomes: to be published.

Google Scholar

[7] L. D. Carlos, V. de Zea Bermudez, R. A. Ferreira. L. Marques and M. Assunção: Chem. Mat. Vol. 11 (1999), p.581.

Google Scholar

[8] M. C. Gonçalves, V. de Zea Bermudez, R. A. Ferreira, L. D. Carlos, D. Ostrovskii and J. Rocha: Chem. Mat. Vol. 16 (2004), p.2530.

Google Scholar

[9] R. A. Ferreira and L. D. Carlos: J. Sol-Gel Sci. Tech. Vol. 26 (2003), p.315.

Google Scholar

[10] J. R. Lakowicz, B. Shen, S. D´Auria and I. Gruczynski: Biochem. Biophys. Res. Commun. Vol. 286 (2001), p.875.

Google Scholar

[11] J. Cersten and A. Nitzan: J. Chem. Phys. Vol. 75 (1981), p.1139.

Google Scholar

[12] K. G. Tomas and P. V. Kamat: J. Am. Chem. Soc. Vol. 122 (2000), p.2655.

Google Scholar

[13] E. Dulkeith, A. C. Morteani, T. Niedereichholz, T. A. Klar, J. Feldmann, S. A. Levi, F. C. J. M. van Veggel, D. N. Reinhoudt, M. Möller and D. I. Gittins: Phys. Rev. Let., Vol. 89 (2002), p.203002.

DOI: 10.1103/physrevlett.89.203002

Google Scholar

[14] L. Lu, H. Wang; Y. Zhou, S. Xi, H. Zhang, J. Hu and B. Zhao: Chem. Comm. Vol. 2 (2002), p.144.

Google Scholar

[15] L. M. Liz-Marzán, M. Giersig and P. Mulvaney: Langmuir Vol. 12 (1996), p.4329.

Google Scholar

[16] A. Mooradian: Phys. Rev. Lett. Vol. 22 (1969), p.185.

Google Scholar

[17] L.D. Carlos, R.A. Sá Ferreira and V. de Zea Bermudez: Light Emission from OrganicInorganic Hybrids Lacking Activator Centers in Handbook of Organic-Inorganic Hybrid Materials and Nanocomposites (American Scientific Publishers, USA 2003).

Google Scholar

[18] L. D. Carlos, R. A. Sá Ferreira, R. N. Pereira, M. Assunção and V. de Zea Bermudez: J. Phys. Chem B Vol. 108. (2004) p.14924.

Google Scholar

[19] R. A. Sá Ferreira, L. D. Carlos, R. R. Gonçalves, S. J. L. Ribeiro and V. de Zea Bermudez: Chem. Mat. Vol. 13 (2002) p.2991.

Google Scholar

[20] R. J. Förster: Discuss. Faraday Soc. Vol. 27 (1959) p.7.

Google Scholar

[21] B. W. Van der Meer, M. A. Raymer, S. L. Wagoner, R. L. Hackney, J. M. Beechem and E. Gratton: Biophys. J. Vol. 64 (1993) p.1243.

DOI: 10.1016/s0006-3495(93)81490-5

Google Scholar