Description
For applications where the toxicity of Cd based Quantum dots (QDs) limits their use, NanoOptical Materials offers Cd Free Quantum Dots composed of CuInS cores surrounded by a discrete shell of ZnS. These Cd Free QDs share the nearly ideal luminescent properties of other QDs because of their high brightness, strong optical absorbance over a wide excitation wavelength range, photostability and defined emission spectra. State of the art synthesis results in high quantum yields (brightness) because the CuInS cores contain no Zn which is confined only to the ZnS shell enhancing quantum containment. We provide these CuInS/ZnS core/shell QDs to achieve fluorescent emission over the spectral region of 660 to 1010 nm (selectable at 20 nm intervals). These CuInZnS/ZnS QDs have FWHM bandwidths in the range of 160 to 210 nm and high Quantum Yields from 60% to >70%.
Water soluble forms of CuInS/ZnS QDs are prepared by coating the QDs with hydrophilic surfactants that are thiols with terminal end groups of either a carboxylic acid, and primary amine or a diol. A choice of these coatings are available with the wavelength selections shown below (660 nm to 1010nm at 20 nm intervals). The longer wavelengths (900 to 940) are especially useful for in vivo imaging with biological specimens and materials with minimal autofluorescence. All wavelengths are useful for other biolabeling applications such as immunoassays as well.
The organic soluble forms of these quantum dots are surface coated with surfactants that make them lipophilic and dispersable in organic solvents such as toluene, chloroform, and hexane. These high quality Cd Free CuInS/ZnS core/shell QDs are available starting at $145. They are normally dispersed in toluene but other solvents are available by request. Please see the product code and links in the description table below to see specifications and spectra. The organic soluble form is especially useful for the fabrication of display devices, illumination, and light emitting diode light source at wavelengths from red to the near infrared (NIR).
Available CuInZnS/ZnS Core/Shell Water Soluble Quantum Dots
| Product Code | Emission Peak Center (nm) ± 10 nm | Coating End Functional Group |
| Thiol molecule terminated with Acid, Amine or Diol | ||
| CISZ680-WS | 680 | Thiol molecule terminated with Acid, Amine or Diol |
| CISZ700-WS | 700 | Thiol molecule terminated with Acid, Amine or Diol |
| CISZ720-WS | 720 | Thiol molecule terminated with Acid, Amine or Diol |
| CISZ740-WS | 740 | Thiol molecule terminated with Acid, Amine or Diol |
| CISZ760-WS | 760 | Thiol molecule terminated with Acid, Amine or Diol |
| CISZ780-WS | 780 | Thiol molecule terminated with Acid, Amine or Diol |
| CISZ800-WS | 800 | Thiol molecule terminated with Acid, Amine or Diol |
| CISZ820-WS | 820 | Thiol molecule terminated with Acid, Amine or Diol |
| CISZ840-WS | 840 | Thiol molecule terminated with Acid, Amine or Diol |
| CISZ860-WS | 860 | Thiol molecule terminated with Acid, Amine or Diol |
| CISZ880-WS | 880 | Thiol molecule terminated with Acid, Amine or Diol |
| CISZ900-WS | 900 | Thiol molecule terminated with Acid, Amine or Diol |
| CISZ920-WS | 920 | Thiol molecule terminated with Acid, Amine or Diol |
| CISZ940-WS | 940 | Thiol molecule terminated with Acid, Amine or Diol |
| CISZ960-WS | 960 | Thiol molecule terminated with Acid, Amine or Diol |
| CISZ980-WS | 980 | Thiol molecule terminated with Acid, Amine or Diol |
| CISZ1010-WS | 1010 | Thiol molecule terminated with Acid, Amine or Diol |
We encourage you to Contact Us for questions or special requirements.
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