Silicon (Si) nanopartilces which studied are in the size range (7 – 23 nm) have
been synthesized by mechanical milling. The milled powder was etched by HF &
CH3COOH acids. The size, structural, and optical characterization of these
nanoparticles were determined by X-ray diffraction(XRD),Atomicforce microscopy
(AFM),Fourier transform infrared spectroscopy (FTIR) and UV-VIS spectroscopy. The
result confirmed that Si isnanoparticles in crystal phase with band gap 3.15eV, due to
the effect of quantum confinement. This technique has been shown to have an
advantage over other methods of producing nanoparticles because of low cost, small
particles size, low agglomeration, narrow size distributions and uniformity of crystal
structure and morphology.
Keywords: Si Nan particles, Mechanical Milling, FTIR, Optical Band Gap.
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