A Raman spectroscopic study of photoluminescent porous silicon fibres

Huong, Pham V.; Khôi, Phan Hồng; Tam, Ngo Thi Thanh; Hoa, P.L.P.; Tuong, Le Thi Cat

doi:10.1016/s1466-6049(99)00032-x

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“…The intense peak at around 500 cm −1 is ascribed to the transverse optical phonon modes of crystalline silicon [ 12 ]. The red shift of this peak with respect to bulk Si crystals (521 cm −1 ) can be attributed to confinement effects [ 13 , 14 ]. The broad bands in the 250–350 and 900–1000 cm −1 regions correspond to the acoustic modes and the second order Raman signal of silicon, respectively.…”

Section: Resultsmentioning

confidence: 99%

Silicon Encapsulated Carbon Nanotubes

et al. 2009

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A dual stage process of depositing bamboo-like carbon nanotubes (BCNTs) by hot filament chemical vapor deposition (HFCVD) and coating Si using Radio frequency sputtering (RFS) technique. The films were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and electron field emission studies (EFE). SEM results suggest a dense network of homogeneous silicon-coated BCNTs. From the comprehensive analysis of the results provided by these techniques emerges the picture of Si encapsulated BCNTs.

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Section: Resultsmentioning

confidence: 99%