In this work, nanostructured porous silicon (pSi) prepared by a metal-assisted stain etched route is investigated for its ability to act as a carrier for sustained delivery of the antibacterial drug triclosan.The morphol., analyzed by transmission electron microscopy, reveals a rather different microstructure than traditional anodized porous silicon; as a consequence, such morphol. manifests a different loaded drug crystallinity, triclosan release behavior, and associated antibacterial activity vs. Staphylococcus aureus relative to high porosity anodized porous silicon.In addition to electron microscopies and antibacterial disk diffusion assays, a combination of x-ray diffraction, thermogravimetric analyses, and UV/Vis spectrophotometric anal. of triclosan release are employed to carry out the above investigations.