Tellurene is a non-layered two-dimensional (2D) material made up of layers of tellurium atoms stacked in a triangular lattice. As an emerging 2D monolayer material of VIA group elements, tellurene exhibits many exciting fundamental properties, including chemical and mechanical stability, a large band gap and high carrier mobility, fast photoconductivity, high thermoelectricity, and excellent nonlinear optical response.
Alfa Chemistry specializes in 2D nanomaterials research involving transition metal disulfides (TMDC) and trisulfides (TMTC), MXenes and graphene nanomaterials. Tellurene solutions are part of our comprehensive catalog of 2D materials. Our R&D team is led by a group of PhDs with international research and many years of research experience. We can "personalize" our manganese dioxide solutions to meet our customers' needs. Contact us today for quick assistance.
Tellurene Disulfide Synthesis and Characterization
Depending on your needs, Alfa Chemistry may provide unique solutions containing tellurene in monolayers, fewer layers, or thicker flakes. To customize our solutions, we use a simple but cost-effective liquid phase exfoliation approach. We first produce tellurene crystals and then disperse them in an electronic grade chemical solvent with a purity of 99.9999 percent using ultrasonic treatment. Ultrasonic treatment produces extremely crystalline tellurene monolayers and multiple layers suspended in the dispersion because the beginning tellurene crystal material is highly crystalline. Because of its good dispersion, stability, and performance, our custom tellurene solutions are dispersed in isopropanol at high concentrations by default. Other solvents and specific concentrations are available upon request.
Fig 1. Preparation processes of few-layer tellurene nanosheets. (Xu N, et al. 2019)
We have grown tellurene crystals at 99.9995% purity by crystal growth techniques such as chemical vapor transfer (CVT), flux transfer. Tellurene nanomaterials have been characterized by techniques such as electron energy dispersive spectroscopy (EDAX), Raman spectroscopy, and scanning electron microscopy (SEM). We can also provide guidance to our customers on material characterization and selection.
Note
In order to reduce shipping costs and simplify the customs protocol/border inspection process, we primarily ship supersaturated 2D solutions, the concentration of which depends specifically on the type of 2D layer. The customized solutions are stable under ambient conditions. The supersaturated solution can be diluted to a large amount after it is in the hands of the customer and can subsequently be easily deposited on the specified substrate or surface. The lateral dimensions of tellurene sheets deposited on different substrates range from 10 nm to tens of microns.
Fig 2. Previously reported 2D Te materials. (a) vdWE-grown hexagonal Te nanoplates. (b) vdWE-grown monolayer and few-layer tellurene on a graphene/6H-SiC substrate. (c) Epitaxial Te thin film on an HOPG substrate. (d) Liquid-phase exfoliated Te nanocrystals. (Wu W, et al. 2018)
References
- Xu N, et al. (2019). "Tellurene-Based Saturable Absorber to Demonstrate Large-Energy Dissipative Soliton and Noise-Like Pulse Generations." Nanophotonics. 9(9): 0545.
- Wu W, et al. (2018). "Tellurene: Its Physical Properties, Scalable Nanomanufacturing, and Device Applications." Chem. Soc. Rev. 47: 7203-7212.
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