Cadmium Based Quantum Dots
NOM Cd based core/shell Quantum Dots provide narrow band fluorescent emission at wavelengths ranging from 420 nm to 880 nm. These core/shell complexes provide higher levels of photoluminescence and stability when compared to core only complexes. Our organic soluble quantum dots are surface coated with organic surfactants that make them lipophilic and soluble in organic solvents such as toluene, chloroform, and hexane. Our water soluble Cd based Quantum Dots are coated with hydrophilic ligands and are available with a choice of three different end functional groups: acid, amine or diol.
Lead Based Longer Near Infrared Quantum Dots
Our improved PbS/CdS Near infrared (NIR) Quantum Dots extend fluorescent emission wavelengths available from quantum dots to the range of 900 nm to 1000 nm. These core/shell Quantum Dots have higher quantum yields (are brighter) and have greater wavelength stability relative to the core only PbS quantum dots that are commercially available. The organic soluble version of these core/shell quantum dots are surface coated with organic surfactants that make them lipophilic and soluble in organic solvents such as toluene, chloroform, and heptane. Water soluble versions of these QDs are coated with hydrophilic surfactants terminated with a choice of acid, amine or diol functional groups. All emission center wavelengths in the range of 900 nm to 1000 nm, ±10 nm are available from inventory.
Cadmium Free Quantum Dots
For applications where the toxicity of Cd based Quantum Dots (QDs) limits their use, NanoOptical Materials offers Cd Free Quantum Dots having fluorescent emission over a wide range of visible and near infrared wavelengths, 520nm to 760nm.
For the visible emission region of the spectrum, we provide InP/ZnSe/ZnS core/shell QDs emitting at wavelengths over the range of 520 to 640 nm, selectable at 20 nm intervals. These QDs have high quantum yields (brightness) and bandwidths in the range of 40 to 60 nm, slightly larger than Cd based QDs.
For the spectral region of 660 to 760 nm (selectable at 20 nm intervals), we provide CuInZnS/ZnS core/shell QDs. CuInZnS/ZnS QDs have larger FWHM bandwidths (95 to 125 nm) and Quantum Yields from 40% to 70%.