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935123

Sigma-Aldrich

Infrared Ag2S quantum dots

λmax, 800 nm, 10 mg/mL in DMF

Synonym(s):

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

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About This Item

Empirical Formula (Hill Notation):
Ag2S
Molecular Weight:
247.80
MDL number:
MFCD00003406
UNSPSC Code:
12352302
PubChem Substance ID:
24854485
NACRES:
NA.21

description

>= 4 (peak/valley ratio)

Quality Level

100

form

liquid

concentration

10 mg/mL in DMF

diameter

<15 nm

λmax

≤70 nm (FWHM)
800 nm

storage temp.

2-8°C

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General description

Silver sulfide (Ag2S) quantum dots (QD) are semiconducting inorganic nanoparticles, offered as a concentrated solution (10 mg/mL) in N,N-dimethylformamide. The most important property of a Ag2S QD is its excitonic absorption peak wavelength, which is controlled by the particle size. These infrared Ag2S quantum dots have an excitonic absorption peak wavelength of 800 nm and narrow peak width, indicating that they are a monodisperse ensemble of nanoparticles, all a very similar size. In addition, Ag2S quantum dots do not contain toxic elements (such as Cd and Pb), making them a greener alternative to Cd- and Pb-based QDs.

Application

Ag2S quantum dots have a range of potential applications in nanodiagnostics, solar cells, and photoelectrochemical biosensors. These nanocrystals can be used as NIR optical imaging probes in research activities aimed at studying nanodiagnostics and imaging in vivo. Additionally, studies have shown that Ag2S QDs can serve as a highly efficient and broadband sensitizer for solar cells, making them a promising material for research and development activities in the field of photovoltaics Ag2S QDs have also demonstrated potential as PEC biosensors, with studies showing that they have extensive potential in this application due to their simplicity, low toxicity, sensitivity, and wide range of potential uses

Legal Information

INFIQ is a registered trademark of Quantum Science Ltd.

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Danger

Hazard Classifications

Acute Tox. 4 Dermal - Acute Tox. 4 Inhalation - Eye Irrit. 2 - Flam. Liq. 3 - Repr. 1B

Storage Class

3 - Flammable liquids

wgk_germany

WGK 2

flash_point_f

135.5 °F - closed cup

flash_point_c

57.5 °C - closed cup

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Ag2S quantum dot-sensitized solar cells
Tubtimtae A, et al.
Electrochemistry Communications, 12, 1158-1160 (2010)
Low-toxic Ag2S quantum dots for photoelectrochemical detection glucose and cancer cells
Zhang X, et al.
Biosensors And Bioelectronics, 56, 307-312 (2014)
Peng Jiang et al.
Biomaterials, 33(20), 5130-5135 (2012-04-10)
A one-step method for synthesizing water-soluble Ag(2)S quantum dots terminated with carboxylic acid group has been reported. The crystal structure and surface of the prepared Ag(2)S quantum dots were characterized. The prepared Ag(2)S quantum dots exhibited bright photoluminescence and excellent

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