We provide customers with a wide range of colloidal products, hurry up and place an order!

Search:

Online Inquiry
Verification code

PbS/CdS Quantum Dots, Longer near-infrared region, Water solvent, 920nm

Typical Properties
Catalog ACMA00022636
Purity 99.9 %
Appearance Dispersion
Storage Shelf life ≥ 1 yr if stored in dark between -15 and 8 °C
Absorption coefficient at first exciton peak 8.5 x 105 Liters/mole-cm
Composition PbS/CdS
Diameter 4.0 nm
Diameter of core plus shell 4.7 nm
Emission Peak Width 154 nm
Fluorescent Emission Peak 920 nm
Functional Group Thiol molecule terminated with Acid, Amine or Diol
Quality Level 100
Quantum Yield ≥ 70 %
Shipping Ambient Temperature
Solvent Water
Surfactant Coating Thiol with carboxylic aicid/primary amine/2 adjacent hydroxyl end group
Overview
Description

Our water-soluble PbS/CdS core/shell QDs have higher quantum yields (brighter) and higher wavelength stability relative to commercially available core-only PbS QDs. The surface of these quantum dots is coated with a hydrophilic surfactant to achieve dispersion in water. PbS/CdS quantum dots exhibit bright broadband visible/near-infrared upconversion emission with decay lifetimes in the hundreds of nanoseconds. These properties make the current PbS/CdS core-shell quantum dots a promising candidate for biomedical fluorescence imaging.

Features

·Good biocompatibility
·Small non-specific adsorption
·High quantum yield
·High molar extinction coefficient
·Strong optical stability
·Narrow emission spectrum

Application

·Bioluminescent label
·Sensitized solar cells
·White LED
·Electronic communications
·LCD