METASTABLE SILVER NANOPARTICLE COMPOSITES WITH COLOR INDICATING PROPERTIES

摘要

Embodiments of the present invention relate to a metastable silver nanoparticle composite, a process for its manufacture, and its use as a source for silver ions and/or colorimetric signaling In various embodiments, the composite comprises, consists essentially of or consists of metastable silver nanoparticles that change shape when exposed to moisture, a stability modulant that controls the rate of the shape change, and a substrate to support the silver nanoparticles and the modulant.

主权项

1. An article comprising a plurality of plasmonic sifter nanoparticles present at a density effective to provide a colorimetric display,
wherein: a first surface of the article comprises plasmonic silver nanoplates, wherein the silver nanoplates are capable of being contacted with a solvent under conditions such that a plurality of silver ions are released from the silver nanoplates thereby producing a colorimetric display; and wherein the release of a plurality of silver ions from a plurality of plasmonic silver nanoplates results in a shift of the peak extinction wavelength of the plasmonic silver nanoplates of at least 5 nm.