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935158

Sigma-Aldrich

Infrared Ag2Se quantum dots

λmax, 980 nm, 50 mg/mL in toluene

Synonym(s):

Fluorescent nanocrystals, INFIQ® quantum dots, Silver based core type QDs

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About This Item

Empirical Formula (Hill Notation):
Ag2Se
Molecular Weight:
294.70
MDL number:
MFCD00014145
UNSPSC Code:
12352302
PubChem Substance ID:
6914520
NACRES:
NA.21

form

liquid

Quality Level

100

concentration

50 mg/mL in toluene

diameter

<15 nm

λmax

980 nm

storage temp.

2-8°C

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General description

Silver selenide (Ag2Se) quantum dots (QD) are semiconducting inorganic nanoparticles, offered as a concentrated solution (50 mg/mL) in toluene with a maximum absorption (λmax) 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.

Application

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 and for SERS in vibrational studies, for example with "in vivo" analysis of biomolecules. In addition, recent studies suggest they may serve as promising mid-wavelength infrared absorbers for thermal sensors and imagers. Our quantum dots are suitable for R&D applications like solar cells, bioimaging, and photovoltaics.

Legal Information

Product of Quantum Science Ltd
INFIQ is a registered trademark of Quantum Science Ltd.

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Signal Word

Danger

Hazard Classifications

Acute Tox. 4 Inhalation - Acute Tox. 4 Oral - Aquatic Chronic 2 - Asp. Tox. 1 - Flam. Liq. 2 - Repr. 2 - Skin Irrit. 2 - STOT RE 2 - STOT RE 2 Inhalation - STOT SE 3

Target Organs

Central nervous system

Storage Class Code

3 - Flammable liquids

WGK

WGK 3

Flash Point(F)

39.2 °F

Flash Point(C)

4 °C

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Ag2Se quantum dots for photovoltaic applications and ligand effects on device performance
Yang Y, et al.
Journal of alloys and compounds, 766, 925-932 (2018)
Silver Selenide Colloidal Quantum Dots for Mid-Wavelength Infrared Photodetection
Hafiz S B, et al.
ACS Applied Nano Materials, 3, 1631-1636 (2019)
Radial breathing modes in silver selenide quantum dots
Martinez-Nu?ez C N, et al.
Materials Letters, 167, 135-140 (2016)

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