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Ultrathin Quantum-Confined Silver Sulfide Nanoplatelets: Synthesis and Characterization

UW ID: 17-126

Description of Technology

          A semiconducting nanoplatelet, or NPL, is a semiconducting nanomaterial. They have applications in display technologies, light emitting devices, and photovoltaics. The traditional way of producing NPLs creates significant barriers. These come in the form of a lack of adaptability and difficulty in producing high quality products.

          Researchers at the University of Wyoming have created a new way of producing silver sulfide (Ag2S) NPLs via wet-chemical synthesis. NPLs created using this method are nontoxic and can be easily produced, manipulated, and applied. They are also ultrathin with a uniform thickness as small as 3.5±0.2 Å. This creates a quantum confinement ratio of 12.6 which is twelve times smaller than the 4.4 nm 1S Bohr diameter. This quantum confinement creates about a 30% photoluminescence quantum yield which is the largest ever measured from any form of Ag2S. These NPLs are also stable for several months in solution. 


          The stability of these NPLs makes them well suited for detailed optical and electrical studies. Also, because of the absorption properties of the Ag2S NPLs, the material is feasible for optical energy harvesting. Along with those, since the NPLs are nontoxic and have such a high PL quantum yield they have a potential use in biomedical imaging.

Features & Benefits

  • Ease of production, scalable

  • Easily manipulated and applied

  • Almost an order of magnitude thinner than any other previously synthesized colloidal nanoplatelets

  • Nontoxic

  • High absorption properties

  • Largest photoluminescence quantum yield ever measured from any form of Ag2S

  • Stable for several months in solution

Downloadable PDF: 17-126


Kubie, Lenore
King, Laurie A.
Kern, Meghan E.
Murphy, Joseph R.
Kettel, Sabash
Yang, Qian


Patent Status:  

Patent Pending

Contact Us: 

University of Wyoming Technology Transfer and Research Products Center 

Dept. 3672

1000 E. University Ave. 

Laramie, WY 


Phone: 307-766-2520

Fax: 307-766-2530

Contact Us

Wyoming Technology Transfer and Research Products Center

Dept. 3672

1000 E. University Ave.

Laramie, WY 82071

Phone: (307) 766-2520

Fax: (307) 766-2530


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