Tin diselenide (SnSe2) is an n-type binary semiconductor having two-dimensional (2D) layered transition metal disulfide (TMDC) characteristics. Every sixth selenium atom in each layer is positioned at the corner of an octahedron and exhibits inversion symmetry. The layer structure enables both solid and liquid exfoliation, allowing layers to be stripped from bulk crystals or powders.
The photoresponsiveness of atomically layered SnSe2 is superior to that of most other two-dimensional layered materials, with very fast rise and fall response rates. As a result, layerless SnSe2 appears to be a potential active 2D material for electrical and optoelectronic applications. Powder-exfoliated SnSe2 films with a layered structure provide up new possibilities for practical applications in lithium-ion batteries, electrical bonding, field-effect transistors, photodetectors, and supercapacitors.
Alfa Chemistry specializes in 2D nanomaterials research. Our R&D team is led by a group of PhDs with international studies and years of research experience. We can "personalize" our SnSe2 flake solutions to meet the needs of our customers. Please contact us today to assist you in quickly solving your application problems.
Tin Diselenide Solution Synthesis and Characterization
Alfa Chemistry creates customized dispersion solutions with SnSe2 monolayer and layerless sheets. Because of its good dispersion, stability, and performance, we will give SnSe2 flakes suspended in isopropanol by default. However, if your research requires other solvents, please contact us for more details. The types of dispersions we can provide include, but are not limited to:
- Ethanol
- Isopropanol
- Deionized water
- NMP
Fig 1. Supercell structure of SnSe2. (Kim J. T, et al. 2018)
To make unique solutions, we use liquid-phase exfoliation, which helps to exfoliate and generate monolayer dispersions and multiple layers of nanosheets. We start by synthesizing SnSe2 crystals with a purity of 99.9995 percent, then ultrasonically disperse them into a high-purity dispersion. The SnSe2 layers are sonicated to form extremely crystalline SnSe2 monolayers and a few layers are suspended in the dispersion solution because the starting material is highly crystalline. Depending on your needs, we may create monolayer, few-layer, multilayer, or even bulk layered solutions.
Custom solutions are environmentally stable and can be easily deposited on selected substrates or surfaces. The lateral dimensions of SnSe2 flakes deposited on various substrates range from approximately 10 nm to 10 um, while the thickness ranges from 1 L to thicker flakes. Scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), electron energy dispersive spectroscopy (EDAX), Raman spectroscopy, and radio photoelectron spectroscopy (XPS) have all been used to corroborate various characterizations of SnSe2 nanomaterials.
Fig 2. Supercell structure of SnSe2. (Li X, et al. 2020)
Note
In order to reduce shipping costs, we mainly ship supersaturated 2D solutions, the concentration of which depends specifically on the type of 2D layer. The supersaturated solution can be diluted into a large amount after the customer gets it. The customer can then deposit the 2D layer onto the desired substrate by a simple process. Please do not hesitate to contact us if you have any needs.
References
- Kim J. T, et al. (2018). "Role of Fluorine in Two-Dimensional Dichalcogenide of SnSe2." Scientific Reports. 8: 1645.
- Li X, et al. (2020). "Layered SnSe2 Microflakes and SnSe2/SnO2 Heterojunctions for Low-Temperature Chemiresistive-Type Gas Sensing." J. Mater. Chem. C. 8: 15804-15815.
Please kindly note that our products are for research use only.
