Size-dependent surface plasmon resonance in silver silica nanocomposites

Senoy Thomas, Saritha K. Nair, E. Muhammad Abdul Jamal, S. H. Al-Harthi, Manoj Raama Varma, M. R. Anantharaman

Research output: Contribution to journalArticle

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Abstract

Silver silica nanocomposites were obtained by the sol-gel technique using tetraethyl orthosilicate (TEOS) and silver nitrate (AgNO3) as precursors. The silver nitrate concentration was varied for obtaining composites with different nanoparticle sizes. The structural and microstructural properties were determined by x-ray diffractometry (XRD), Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). X-ray photoelectron spectroscopic (XPS) studies were done for determining the chemical states of silver in the silica matrix. For the lowest AgNO3 concentration, monodispersed and spherical Ag crystallites, with an average diameter of 5 nm, were obtained. Grain growth and an increase in size distribution was observed for higher concentrations. The occurrence of surface plasmon resonance (SPR) bands and their evolution in the size range 5-10 nm is studied. For decreasing nanoparticle size, a redshift and broadening of the plasmon-related absorption peak was observed. The observed redshift and broadening of the SPR band was explained using modified Mie scattering theory.

Original languageEnglish
Article number075710
JournalNanotechnology
Volume19
Issue number7
DOIs
Publication statusPublished - 2008

Fingerprint

Silver Nitrate
Surface plasmon resonance
Silver
Silicon Dioxide
Nanocomposites
Silica
Nanoparticles
X rays
Infrared transmission
Photoelectrons
Grain growth
Crystallites
Sol-gels
Nitrates
Scattering
Transmission electron microscopy
Composite materials
Fourier transform infrared spectroscopy
tetraethoxysilane

ASJC Scopus subject areas

  • Materials Science(all)
  • Bioengineering
  • Chemistry(all)
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Thomas, S., Nair, S. K., Jamal, E. M. A., Al-Harthi, S. H., Varma, M. R., & Anantharaman, M. R. (2008). Size-dependent surface plasmon resonance in silver silica nanocomposites. Nanotechnology, 19(7), [075710]. https://doi.org/10.1088/0957-4484/19/7/075710

Size-dependent surface plasmon resonance in silver silica nanocomposites. / Thomas, Senoy; Nair, Saritha K.; Jamal, E. Muhammad Abdul; Al-Harthi, S. H.; Varma, Manoj Raama; Anantharaman, M. R.

In: Nanotechnology, Vol. 19, No. 7, 075710, 2008.

Research output: Contribution to journalArticle

Thomas, S, Nair, SK, Jamal, EMA, Al-Harthi, SH, Varma, MR & Anantharaman, MR 2008, 'Size-dependent surface plasmon resonance in silver silica nanocomposites', Nanotechnology, vol. 19, no. 7, 075710. https://doi.org/10.1088/0957-4484/19/7/075710
Thomas, Senoy ; Nair, Saritha K. ; Jamal, E. Muhammad Abdul ; Al-Harthi, S. H. ; Varma, Manoj Raama ; Anantharaman, M. R. / Size-dependent surface plasmon resonance in silver silica nanocomposites. In: Nanotechnology. 2008 ; Vol. 19, No. 7.
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