Blue coloured aqueous dispersion of silver nanoparticles a process for preparation and compositions thereof

The present invention provides blue colored aqueous dispersion of silver nanoparticles and process for preparation thereof. The present invention also provides compositions comprising blue colored dispersion of silver nanoparticles. The blue colored aqueous dispersion comprising silver nanoparticles...

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Bibliographische Detailangaben
Hauptverfasser:	Srinivasan Ganesh, Paul Sangita, Agrawal Ashwini K, Pamidipati Gayatri Hela, Jassal Manjeet
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES AGRICULTURE ANIMAL HUSBANDRY BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS CORRECTING FLUIDS DYES FILLING PASTES FISHING FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR FORESTRY HUMAN NECESSITIES HUNTING INKS LAUNDERING METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PERFORMING OPERATIONS PEST REPELLANTS OR ATTRACTANTS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL PLANT GROWTH REGULATORS POLISHES PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF TEXTILES THEIR RELEVANT APPARATUS TRANSPORTING TRAPPING TREATMENT OF TEXTILES OR THE LIKE TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS,FABRICS, FEATHERS, OR FIBROUS GOODS MADE FROM SUCH MATERIALS USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	The present invention provides blue colored aqueous dispersion of silver nanoparticles and process for preparation thereof. The present invention also provides compositions comprising blue colored dispersion of silver nanoparticles. The blue colored aqueous dispersion comprising silver nanoparticles wherein dispersion is characterized by -having plasmonic peaks in the range 330-335 nm and 650-720 nm combined with missing plasmonic peaks in the range 390 to 410 nm and 410-500 nm in UV-Vis spectrum, -the dispersion having silver nanoparticles of anisotropic shape with majority of particles (>65%) having equivalent diameter in range of 0.5 to 6 nm, -Molar extinction coefficient greater than 10.1 preferably in the range of 10.1 to 15.7 mM−1 cm−1 at wavelength of maximum absorption in the range of 650-720 nm, -Dispersion stability of at least 15 months, -Minimum Bactericidal Concentration (MBC) lower than 0.10 ppm preferably in the range of 0.055-0.099 ppm.