title: Formation of nanometal particles in the dialdehyde starch matrix.
abstract: Environmentally friendly method of the preparation of dialdehyde starch (DAS) based composites containing nanosilver (DAS/Ag) and nanogold (DAS/Au) as reducing and protecting agents was developed. UV-vis spectroscopy, transmission electron microscopy (TEM) and X-ray diffraction (XRD) confirmed formation of about 10nm ball shaped Ag and Au nanoparticles situated within the polysaccharide template. Thermal properties of the composites were characterized involving differential scanning calorimetry (DSC), whereas molecular weights of polysaccharide chains of the matrix were estimated with the size exclusion chromatography coupled with multiangle laser light scattering and refractometric detectors (HPSEC-MALLS-RI). Formation of nanosilver and nanogold containing composites led to induction of the polymerization and/or crosslinking reactions of DAS molecules, resulting in a significant rise of molecular weight of polysaccharide chains constituting DAS/Ag and DAS/Au composite templates.
authors.affiliation: Department of Chemistry and Physics, Agricultural University, Balicka Street 122, 30 149 Krakow, Poland. rrchacza@cyf-kr.edu.pl
authors.forename: Karen
authors.initials: K
authors.lastname: Khachatryan
authors.forename: Gohar
authors.initials: G
authors.lastname: Khachatryan
authors.forename: Maciej
authors.initials: M
authors.lastname: Fiedorowicz
authors.forename: Andrzej
authors.initials: A
authors.lastname: Para
authors.forename: Piotr
authors.initials: P
authors.lastname: Tomasik
mesh_terms: D053768:Metal Nanoparticles / Q000737:chemistry*; D008970:Molecular Weight; D012399:Rotation; D013213:Starch / Q000031:analogs & derivatives* / Q000737:chemistry; D013816:Thermodynamics
chemical_list: D013213:Starch; C012880:dialdehyde starch
keywords: Biocomposites; Nanogold; Nanometals; Nanosilver