1 micron Amphoteric Surface Groups, Green Fluorescent Powder, from natural diamond, contains traces of red FL particles

Fluorescent diamond particles are a chemically and mechanically robust, infinitely photostable, and biocompatible fluorophore. We provide diamond particles with nitrogen-vacancy (NV) centers with red-to-near-infrared (NIR) fluorescence, NVN centers with green fluorescence, and novel particles containing silicon-vacancy (SiV) centers emitting in NIR. Perspective applications include exceptionally bright fluorescent labels in combination with sensing capability (via NV centers) in the fields where particles with microns sizes can be tolerated. For example, with unmistakable fluorescence characteristics and chemical robustness, fluorescent diamonds provide protection against counterfeiters for your products. Diamond fluorescence exhibits a uniqueness that is not easily replicated and can be validated with an array of analysis techniques for assurance and peace of mind. Other applications include fluorescent fluid tracers, fluorescent paints, forensic, bioimaging, energy applications.

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Background

Diamond particles containing color centers (fluorescent crystallography defects) embedded within diamond lattices outperform other classes of fluorophores due to their excellent photostability, magneto-optical coupling properties, biocompatibility, and mechanical and chemical stability. This unique combination of properties makes fluorescent diamond particles ideal fluorophores with emerging applications in a variety of fields, including bioimaging, nanoscale ultrasensitive metrology, fluorescent labeling in industrial applications, and possibly even as magnetic resonance imaging contrast agents.
Optically active defects of various origins and structures exist in diamond, including intrinsic and impurity defects, as well as point and extension defects. The impurities known to form optically active defects in diamond particles are H, He, Ne, Xe, Li, B, N, O, P, Si, Ge, As, Ti, Cr, Ni, Co, Zn, Zr, Ag, W, Tl, etc., most of which are introduced by ion implantation. Most optically active defects in diamond are complexes consisting of impurity atoms bound to intrinsic structural defects.