PbS/CdS Quantum Dots, Longer near-infrared region, Water solvent, 940nm

Typical Properties
Catalog	ACMA00022637
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	9.4 x 105 Liters/mole-cm
Composition	PbS/CdS
Diameter	4.1 nm
Diameter of core plus shell	4.8 nm
Emission Peak Width	137 nm
Fluorescent Emission Peak	940 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