Journal ArticleDOI
Raman scattering from acoustic phonons confined in Si nanocrystals.
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TLDR
It was found that the Raman spectra depend strongly on the size of the nanocrystals and the peaks shift to higher frequencies as the size decreases, and the depolarized Ramen spectra appear at much lower frequencies than the polarized ones.Abstract:
We have observed Raman scattering from acoustic phonons confined in Si nanocrystals. It was found that the Raman spectra depend strongly on the size of the nanocrystals and the peaks shift to higher frequencies as the size decreases. We also found that the depolarized Raman spectra appear at much lower frequencies than the polarized ones.read more
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Raman Spectroscopy of Nanomaterials: How Spectra Relate to Disorder, Particle Size and Mechanical Properties
TL;DR: In this article, the authors provide a basic understanding of the information micro-Raman Spectroscopy (mRS) may yield when applied to nanomaterials, a generic term for describing nano-sized crystals and bulk homogeneous materials with a structural disorder at the nanoscale.
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Size dependence of nanostructures: Impact of bond order deficiency
Chang Q. Sun,Chang Q. Sun +1 more
TL;DR: The BOLS correlation mechanism has been initiated and intensively verified as discussed by the authors, which has enabled the tunability of a variety of properties of a nanosolid to be universally reconciled to the effect of bond order deficiency of atoms at sites surrounding defects or near the surface edges of the nano-material.
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1.54 μm photoluminescence of Er3+ doped into SiO2 films containing Si nanocrystals: Evidence for energy transfer from Si nanocrystals to Er3+
TL;DR: In this paper, SiO2 films containing Si nanocrystals (nc-Si) and Er were studied and their photoluminescence properties were assigned to electron-hole recombination in nc-Si and the intra-4f transition in Er3+, respectively.
Journal ArticleDOI
Size dependent properties of Au particles: Coherent excitation and dephasing of acoustic vibrational modes
TL;DR: In this article, it was shown that the low frequency acoustic breathing modes of Au particles are impulsively excited by the rapid heating of the particle lattice that occurs after laser excitation.
Journal ArticleDOI
Photoluminescence from SiO2 films containing Si nanocrystals and Er: Effects of nanocrystalline size on the photoluminescence efficiency of Er3+
TL;DR: In this article, SiO2 films containing Si nanocrystals (nc-Si) and Er were prepared and their photoluminescence (PL) properties were studied, which could be assigned to the electron-hole recombination in nc-Si and the intra-4f transition in Er3+, respectively.