Pulsed laser ablation of bulk Pt in tetraethyl orthosilicate caused C-doped Pt and its silicides with special structures as identified by analytical electron microscopy. The former belongs to lamellar/fcc-type, whereas the latter are orthorhombic PtSi with (110) polysynthetic twinning and body-centered tetragonal Pt16Si7C1, i.e. a 2 root 2 x 2 root 2 x 1 supercell of the parental Pt2Si1-x by Si/C ordering, with well developed (132) face having periodic bond chains bypassing the covalent Si-C clusters at the body center. The C-doped PtSi particulate tended to coalesce with the fcc-Pt particulate following the epitaxial relationship [100](PtSi)[011](pt); (001)(PtSi)(100)(pt) across a curved interface for 3-D lattice match. The overall substances have significant UV absorption for potential optocatalytic applications and shed light on dynamic phase selection in the Pt-Si-C system. (C) 2017 Elsevier B.V. All rights reserved.