2D Materials / Alfa Chemistry
h-BN Solution Customization
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h-BN Solution Customization

Alfa Chemistry specializes in two-dimensional (2D) nanomaterials technology business. Our R&D team is led by a group of PhDs with international experience and many years of research.

Two-dimensional boron nitride (BN) nanosheets are made up of layers of hexagonal boron and nitrogen atoms that alternate. Alfa Chemistry has been working hard in recent years to improve the separation of BN nanosheets in order to obtain higher dispersion, which will help with applications in optical devices, biological systems, and composites.

We can "personalize" our hexagonal boron nitride solution products to meet our customers' needs. Please contact us as soon as possible so we can help you solve your application problems quickly.

h-BN Solution Synthesis and Characterization

Alfa Chemistry provides customers with unique solutions incorporating h-BN monolayers as well as layerless. We prepare custom solutions using the liquid phase exfoliation (LPE) method, a simple but cost-effective solution processing technique. Ultrasonic treatment, in which waves created by cavitation of bubbles in the solvent medium aid to strip the layers off the body, is an effective method for stripping layered materials. Ultrasonic vibrations in the liquid medium contribute to peeling in LPE, allowing monolayers and multiple nanosheets to peel and disperse.

Solution-processed layered hexagonal boron nitride dielectrics are fabricated for high-performance flexible devices.Fig 1. Solution-processed layered hexagonal boron nitride dielectrics are fabricated for high-performance flexible devices. (Gupta B, et al. 2019)

Due to the high crystalline nature of the beginning h-BN material, sonication to delaminate yields highly crystalline h-BN monolayers, a few layers, and some large layers suspended in solution. Depending on your needs, we may create single-layer, few-layer, multi-layer, or even bulk-layered solutions. To create a stable and concentrated dispersion during the peeling process, we normally eliminate additives by selecting a solvent with a Hansen solubility parameter (HSP) that closely matches the substance to be peeled.

The tailored solutions are stable in ambient circumstances and may be simply applied to form a thin film coating on any substrate or surface. The thickness of h-BN flakes formed on various substrates ranges from 1L to 10s of layers, with lateral dimensions ranging from around 25 nm to 10 mm. SEM photos, high resolution transmission electron microscopy (HRTEM) images, electron energy dispersive spectroscopy (EDAX), Raman spectroscopy, and X-ray photoelectron spectroscopy (XPS) measurements were used to assess the crystallinity of h-BN nanomaterials.

Specifications
IdentificationThe h-BN solution produced by layering h-BN crystals by ultrasonic technology
Physical Sizes1 to 10 layers thick (thicker fragments may be observed depending on usage), 10 nm to 10 µm lateral dimension.
Purity99.999%
SmoothnessAtomically smooth surface with roughness < 0.35 nm.
CrystallinityHighly crystalline nanomaterials. No amorphous flakes, contaminants or hidden second phases.
Dispersant solutionEthanol, isopropanol, deionized water, NMP, other solvents can be prepared as needed.
StabilityHigh environmental and dispersant stability.
SupportWe provide full technical support and guarantee your satisfaction with our renowned customers.
Characterization MethodsRaman, EDS, AFM, SEM; Contact us for more information

Please contact us to determine which type of solution you prefer.

TEM image of exfoliated few-layered BN, selected area electron diffraction pattern shows layered BN structure.Fig 2. TEM image of exfoliated few-layered BN, selected area electron diffraction pattern shows layered BN structure. (Lei W. W, et al. 2015)

Note

We ship supersaturated 2D solutions to save money on shipping (concentration depends specifically on the type of 2D layer). Once the supersaturated solution is in the hands of the customer, it is diluted into a bulk solution, and the 2D layers are deposited into the selected substrate using a simple and cost-effective rotary casting technique. Because of its environmental stability, dispersing properties, and non-polluting nature, we propose ethanol as a dispersant solvent. Please contact us if your research necessitates the use of different solvents.

References

  1. Gupta B, et al. (2019). "Solution-Processed Layered Hexagonal Boron Nitride Dielectrics: A Route toward Fabrication of High Performance Flexible Devices." ACS Appl. Electron. Mater. 1(10): 2130-2139.
  2. Lei W. W, et al. (2015). "Boron Nitride Colloidal Solutions, Ultralight Aerogels and Freestanding Membranes through One-Step Exfoliation and Functionalization." Nature Communications. 6: 8849.

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Alfa Chemistry provides cost effective, high quality and hassle free services to our clients worldwide. We guarantee on-time delivery of our results.

If you have any questions at any time during this process, please contact us. We will do our best to meet your needs.

Please kindly note that our products are for research use only.