Additional file 3.

FTIR supplemental image. FTIR spectra of as prepared silicon Nanoparticles (top), acrylic acid functionalized Si NPs (middle), and a polyacrylic acid reference sample (bottom), with the assigned group frequencies.

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Bywalez et al. Nanoscale Research Letters 2012 7:76   doi:10.1186/1556-276X-7-76