Surface Coating / Alfa Chemistry

Customized Nanocoating on Germanium Substrate


Germanium is a glossy, hard, off-white metal-like material with chemical properties similar to those of its cousins, tin, and silicon. Tetraethylgermanium and isobutylgermanane are two examples of organometallic compounds made from germanium. Germanium is a semiconductor substance that is utilized in the production of transistors and other electrical devices. Fiber-optic systems and infrared optics, as well as catalysts for polymerization operations, electronic device production, and solar power, are the most common end-use applications.

Alfa Chemistry offers unique surface modification services for germanium materials that offer numerous performance benefits in a wide range of applications with functional surfaces. With our extensive and specialized surface treatment technologies, you can enhance the surface properties of virtually any germanium-related product. Feel free to work with us to modify the surface properties of your products with ease!

Extensive Surface Modification Technology Options

Alfa Chemistry provides a wide range of surface coating processes for semiconductor materials that can be used to functionalize the surface of germanium substrates and impart various surface features. The following are some of our surface alteration technologies, but they are not exhaustive. Please contact us for more information on our technologies.

  • Surface Waterproof Coating Technology - We can coat the surface of germanium substrates with hydrophobic and oleophobic qualities, making them highly water and oil resistant and effectively impermeable to all liquids.
  • Modified Coating Technology - We can improve particle behavior, reduce aggregation, improve cross-linking, and give them new features by functionalizing germanium particles.
  • Adhesion Promotion Coating Technology - By functionalizing the surface of germanium substrates, we can improve their surface adhesion.
  • Lubricant Coating Technology - We are able to lubricate the surface of germanium substrates to improve their surface friction properties.

Customized Nanocoating on Germanium Substrate

Learn more about our hydrophobic and oleophobic coatings.
Learn more about our adhesion promotion coatings.
Learn more about our particle-modified coatings.
Learn more about our lubricant coatings.

Alfa Chemistry Coating Solution Cases

Case 1: Quantum dots Anti-reflection silicon nitride coating on polycrystalline germanium

In thermal imaging, germanium finds important applications in the form of windows, lenses, and detectors. Roughening of the outer surface of external optics made of germanium is the most common form of damage. Surface roughening results in reduced transmission through the external optics.

Alfa Chemistry has created a micron-scale silicon nitride thin film covering that protects the surface of germanium while increasing transmission in the shorter wavelength range. The silicon nitride sheets were created using a plasma-enhanced chemical vapor deposition (PECVD) technology, and the polycrystalline germanium ingots were grown using directional solidification procedures.

Quantum dots Anti-reflection silicon nitride coating on polycrystalline germanium

Why Choose Alfa Chemistry?

  • Our custom coated products are thin and green and safe.
  • Our solutions are tailored to meet the unique needs of your product.
  • We have extensive experience in surface coating of semiconductor materials.


  • Kishore R, et al. (1997). "Hard Antireflecting PECVD Silicon Nitride Coatings on Polycrystalline Germanium." Infrared Physics & Technology. 38(2): 83-85.

Our products and services are for research use only and cannot be used for any clinical purpose.

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