Zinc Sulfide/Cadmium Selenium Core Shell Nano Particles (ZnS/CdSe, 99.9%, APS: 80-100nm, Inorganic (Semiconductor) core/shell Nanoparticles)

Zinc Sulfide/Cadmium Selenium Core-Shell Nano-Particles

Introduction

Zinc Sulfide/Cadmium Selenium Core-Shell Nanoparticles are a class of core-shell nanomaterials that combine the unique optical properties of zinc sulfide (ZnS) and cadmium selenide (CdSe). In these nanoparticles, the core consists of a well-known semiconductor with excellent photoluminescence properties, while the shell is made of ZnS, a wide-bandgap semiconductor that enhances the optical and stability characteristics of the nanoparticle. This combination of materials allows  core-shell nanoparticles to exhibit tailored fluorescence, improved stability, and enhanced photophysical properties, making them ideal for a variety of applications in fields such as biomedicine, optical devices, sensing, and photovoltaics.

The core-shell architecture of ZnS/CdSe nanoparticles addresses some of the challenges inherent in quantum dot technology, including photobleaching, toxicity, and size-dependent optical properties, and enhances the overall performance and biocompatibility of the particles.

Core-Shell Structure: Composition and Design

components:

Core: Cadmium Selenide

CdSe is a widely studied semiconductor material known for its strong quantum confinement effects and emission properties, especially when reduced to the nanoscale. CdSe quantum dots exhibit size-tunable fluorescence, with emission wavelengths ranging from the green to red regions of the spectrum, depending on the size of the nanoparticles. This tunability makes an excellent material for various optical and photonic applications, such as LEDs, lasers, and biomolecular imaging.

One of the key challenges with quantum dots is their toxicity, primarily due to the presence of cadmium in the material, which raises concerns in biological and environmental contexts. The ZnS shell addresses this issue by providing a protective layer around the  core, encapsulating the cadmium and reducing the toxicity while enhancing the optical properties of the nanoparticle.