Enhanced-Raman scattering from silicon nanoparticle substrates

Liu, F.M.; Ren, Bin; Wu, Jida; Yan, Jiawei; Xue, Xiongzhi; Mao, Bing‐Wei; Zhang, Tian

doi:10.1016/j.cplett.2003.10.102

Cited by 23 publications

(17 citation statements)

References 23 publications

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“…24,25 Due to the presence of the large Si-nc, the optical absorption coefficient and Raman signal are strongly enhanced in the ring area as described elsewhere. [32][33][34] The results of surface analysis are consistent with the observations reported in Ref. 27.…”

Section: Discussionsupporting

confidence: 90%

Surface fingerprints of individual silicon nanocrystals in laser-annealed Si/SiO2 superlattice: Evidence of nanoeruptions of laser-pressurized silicon

Nikitin

Kemell

Puukilainen

et al. 2012

Journal of Applied Physics

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Picosecond and nanosecond laser annealing and simulation of amorphous silicon thin films for solar cell applications J. Appl. Phys. 115, 043108 (2014); 10.1063/1.4863402Structural and electrical studies of ultrathin layers with Si0.7Ge0.3 nanocrystals confined in a SiGe/SiO2 superlattice J.Silicon nanocrystals prepared by continuous-wave laser annealing of a free-standing Si/SiO 2 superlattice are studied for the first time by using methods of surface analysis (scanning electron microscopy and atomic force microscopy). The surface topology and composition are compared with transmission electron microscopy images that show a projection through the whole film, allowing us to discriminate silicon nanocrystals located near the film surface. These nanocrystals have an unusual pear-like shape with the thinner part sticking out of the laser-illuminated surface. The non-spherical shape of these nanocrystals is explained by eruption of silicon pressurized at the stage of crystallization from the melt phase. This hypothesis is supported by the micro-Raman spectra which show low stress near the surface features, in contrast to the neighbouring regions having high compressive stress. V C 2012 American Institute of Physics. [http://dx.

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Section: Discussionsupporting

confidence: 90%

Surface fingerprints of individual silicon nanocrystals in laser-annealed Si/SiO2 superlattice: Evidence of nanoeruptions of laser-pressurized silicon

Nikitin

Kemell

Puukilainen

et al. 2012

Journal of Applied Physics

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“…SERS substrates are now available commercially through instrument suppliers. In the laboratory, colloids can be produced through the reduction of metallic ions in solution, 21 -23 or the surfaces may be vacuum-deposited, 24 electrochemically roughened 25,26 or produced lithographically. 27 In keeping with the intention of developing a rapid method of detection for conservation applications, a reproducible surface that is cheap, quick and easy to produce was used in this study.…”

Section: Introductionmentioning

confidence: 99%

Application of surface‐enhanced Raman spectroscopy (SERS) to the analysis of natural resins in artworks

Lau

Livett

Prawer

2008

J Raman Spectroscopy

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Surface-enhanced Raman spectroscopy (SERS) is rapidly growing as an analytical technique for the detection of extremely low concentrations of analytes. The analysis of natural resins from artworks is often restricted by sample size constraints in general, and Raman spectroscopy in particular is hampered by fluorescence when using visible irradiation wavelengths. This work demonstrates that SERS is able to overcome interference from fluorescence in such samples using the incident wavelength 514.5 nm, to allow collection of SERS spectra from extremely small samples. Characterisation of the natural resin surface coating from a painting by Tiepolo is discussed.

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“…14,15 Such features are expected to be important in the development of ultrahigh-Q and ultralow-threshold lasers. 16 Reports of the effects of structural resonances on Raman scattering have been limited mainly to theoretical and experimental investigations of nondispersive microstructures 10,14,15 of nanoparticles prepared without control of shape and size 17,18 and of lithographically patterned and substrate-integrated structures. 18,19 Within the last ten years, inorganic single-crystalline semiconducting nanowires and functional oxide nanowires and nanobelts have emerged as some of the most important building blocks for nanotechnology.…”

Section: Introductionmentioning

confidence: 99%

On the Raman scattering from semiconducting nanowires

Cao

Laim

Valenzuela

et al. 2007

J Raman Spectroscopy

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We present a short review of recent work on the unusual Raman scattering characteristics in semiconductor nanowires, focusing on the dependence of the intensity, spectral and spatial character of the scattering response on the size, shape and composition of the nanowires. Results of Raman scattering collected from individual Si and nanowires and nanocones indicate that the observed enhancement is dependent on the diameter (d), the excitation wavelength (l laser ) and the incident polarization state. Strong agreement between experimental data and model calculations of scattering from an infinite dielectric cylinder is found. This size dependence is in accordance with other recent findings in which a diameter-dependent dipolar 'antenna' pattern for the scattered intensity and a cross-sectional shape dependence of the surface optic (SO) phonon dispersions were seen. Further providing evidence of the nanowire shape and size dependence on Raman scattering, these results suggest manipulation of classical electromagnetic scattering signatures, thereby expanding opportunities for engineering the photonic and sensing properties of nanowires.

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Enhanced-Raman scattering from silicon nanoparticle substrates

Cited by 23 publications

References 23 publications

Surface fingerprints of individual silicon nanocrystals in laser-annealed Si/SiO2 superlattice: Evidence of nanoeruptions of laser-pressurized silicon

Surface fingerprints of individual silicon nanocrystals in laser-annealed Si/SiO2 superlattice: Evidence of nanoeruptions of laser-pressurized silicon

Application of surface‐enhanced Raman spectroscopy (SERS) to the analysis of natural resins in artworks

On the Raman scattering from semiconducting nanowires

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