Ag Ag2Se Core Shell Nanoparticles (Silver/Silver selenium, 99.9%, APS: 80-100nm)

Ag Ag2Se Core-Shell Nanoparticles

Introduction

Ag Ag₂Se core-shell nanoparticles are a type of nanomaterial where the core is made of silver (Ag), and the shell is made of silver selenide (Ag₂Se). These nanoparticles combine the properties of both materials, resulting in unique characteristics that are useful for a variety of applications.

Silver (Ag) is known for its excellent electrical conductivity, antimicrobial properties, and plasmonic behavior, which refers to the interaction of light with the free electrons in metal nanoparticles.

Silver selenide (Ag₂Se) is a semiconducting material with intriguing electronic and optical properties, such as tunable band gaps, which can be adjusted by varying the particle size or shell thickness. Ag₂Se has also shown promise in thermoelectric applications due to its low thermal conductivity and high electrical conductivity.

Applications

Photothermal Therapy: The plasmonic properties of the silver core can be exploited for localized heating upon light irradiation. This is particularly useful in biomedical applications, such as cancer therapy, where these nanoparticles can selectively target and heat tumor cells to induce thermal damage.

Sensing and Detection:

Surface-Enhanced Raman Spectroscopy (SERS): The silver core enhances the Raman signal, making these nanoparticles ideal for sensitive detection of biomarkers or pollutants.

Gas Sensing: The unique electronic properties of the Ag₂Se shell make these nanoparticles suitable for detecting gases such as CO₂ or NO₂.

Optoelectronics:

Photovoltaic Devices: The tunable band gap of Ag₂Se can be leveraged to improve the efficiency of solar cells, especially in the mid-infrared region.

Photodetectors: Ag/Ag₂Se core-shell nanoparticles are being explored for use in photodetectors, where their ability to absorb and respond to light can be tuned for specific wavelengths.

Thermoelectric Devices: Ag₂Se has low thermal conductivity and high electrical conductivity, making Ag/Ag₂Se core-shell nanoparticles useful in thermoelectric materials that convert waste heat into electricity.

Antimicrobial Coatings: The silver core provides antimicrobial properties, which can be useful in coatings for medical devices, textiles, and water purification systems.

Catalysis: The core-shell structure can also enhance catalytic activity. The silver core can act as an active site, while the Ag₂Se shell can provide structural stability. These materials can be applied in reactions such as CO oxidation or hydrogenation.

Energy Storage: Ag/Ag₂Se nanoparticles can be used in energy storage devices such as supercapacitors or batteries, where their unique electronic and structural properties improve performance.