Sigma-Aldrich form liquid Quality Level 100 concentration 50 mg/mL in toluene diameter <15 nm λ max

Silver selenide (Ag₂Se) quantum dots (QD) are semiconducting inorganic nanoparticles, offered as a concentrated solution (50 mg/mL) in toluene with a maximum absorption (λ_max) at a frequency of 980 nm in the near-infrared (NIR) region. They have low cytotoxicity are an environmental friendly alternative to Cd- or Pb-based nanoparticles, as they don′t contain toxic heavy metals.

Ag₂Se quantum dots exhibit low toxicity and sharp absorption and fluorescence in the NIR region, making them ideal for bioimaging. They can also be used as blocking layers in DSSCs[1] and for SERS in vibrational studies, for example with "in vivo" analysis of biomolecules.[2] In addition, recent studies suggest they may serve as promising mid-wavelength infrared absorbers for thermal sensors and imagers.[3] Our quantum dots are suitable for R&D applications like solar cells, bioimaging, and photovoltaics.

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