Sunstone Nanocrystals from Intelligent Material Solutions Inc. are a proprietary, novel series of rare earth-doped nanocrystals of small size, high quantum efficiency, and high photoluminescent intensity functionalized for use in industrial and life sciences applications. These patented materials possess unique and inherent atomic states that allow the conversion of various wavelengths of light energy up and down the electromagnetic spectrum.
Sunstone Nanocrystals are synthesized using specific compositions of individual rare earths and other host elements. Upconversion luminescence by Sunstone Nanocrystals occurs through a combination of a trivalent rare-earth sensitizer (e.g. Yb, Nd, Er, or Sm) as the element that initially absorbs the electromagnetic radiation and a second lanthanide activator (e.g. Er, Ho, Pr, Tm) ion in an optical passive crystal lattice that serves as the emitting elements. By varying the concentrations and ratios of rare earths, different emission spectra can be elicited from the same combination of elements.
Sunstone Nanocrystals available are 30 nm, which are small enough for life science applications without further processing. Sunstone Nanocrystals have a high degree of structural homogeneity, allowing for finely tuned temporal properties and narrow spectral emission. The nanocrystals are synthesized in the β crystal phase (β-NaYF4), requiring low phonon energy for upconversion. Sunstone Nanocrystals exhibit excellent size distribution, uniformity in shape, and high monodispersity. The crystals are being tested for therapeutic, diagnostic and imaging applications.