Surface Coating / Alfa Chemistry

Customized Nanocoating on Gold Substrate


Gold possesses qualities that make it appropriate for all electrochemical procedures due to its great stability over a wide variety of potentials. Gold is one of the most often utilized substrates due to its ability to produce thin films, as well as microfabrication and photopatterning. Alfa Chemistry provides unique functionalized coating services for gold substrates, which offer various performance advantages in a variety of applications. You may increase the performance of practically any gold-based product with our extensive and simple-to-apply specialty coating technologies. Join together with us to make your stainless steel surfaces more functional!

Extensive Surface Modification Technology Options

Alfa Chemistry offers a number of coating processes that may be used to functionalize gold surfaces and provide a number of performance advantages. Our gold surface alteration possibilities include, but are not limited to, the following:

  • Surface Waterproofing Coating Technology - We can make gold substrates very water and oil-resistant by functionalizing the surface, making them highly resistive to practically any liquid.
  • Hydrophilic Coating Technology - We functionalize gold substrate surfaces to make them very hydrophilic using hydrophilic coating technology.
  • Adhesion Promotion Coating Technology - We can improve the adhesive capabilities of gold substrates by functionalizing them.
  • Particle Modification Coating Technology - Alfa Chemistry can improve particle behavior, reduce aggregation, and promote cross-linking by functionalizing gold powders and particles.
  • Lubricant Coating Technology - To reduce surface friction, we can functionalize gold substrates.

These coatings are all nanoscale in size, optically clear, and long-lasting.

Extensive Surface Modification Technology Options

Learn more about our hydrophobic and oleophobic coatings.
Learn more about our hydrophilic 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: Polyaniline (PANI)/Polycrystalline Gold Composites

The biocompatible conductive polymer polyaniline (PANI) is a low-cost conductive polymer. PANI coatings can be used to create biological interfaces that improve cell-electrode communication in functions like nervous system patterning and recording.

Alfa Chemistry employs a three-step process to achieve stable and homogenous coatings: (1) 4-nitrophenyl group functionalization of the gold surface, (2) electrochemical reduction of nitro to amines, and (3) aniline electropolymerization of aminophenyl modified gold electrodes on the surface.

Case 2: Polyethylene glycolized gold nanoparticles (AuNP)

PEG is frequently used to protect adenovirus (Ads), ablate Ad-loving, and enhance tumor formation. Alfa Chemistry's polyethylene glycolized AuNPs offer good potential for use as Ad vector coatings to improve CAR-negative cell transduction.

Coating adenovirus with functionalized gold nanoparticles is beneficial for uptake, intracellular transport and anticancer therapeutic effects.Fig 1. Coating adenovirus with functionalized gold nanoparticles is beneficial for uptake, intracellular transport and anticancer therapeutic effects. (Gonzalez-Pastor R, et al. 2021)

Why Choose Alfa Chemistry?

  • Our custom coatings are thin, light, environmentally friendly, and safe.
  • We create the right coating solution for the specific requirements of your product.
  • We have extensive experience and have been working on gold-related surface chemistry technologies.


  • Gonzalez-Pastor R, et al. (2021). "Coating An Adenovirus with Functionalized Gold Nanoparticles Favors Uptake, Intracellular Trafficking and Anti-Cancer Therapeutic Efficacy." Acta Biomaterialia. 134: 593-604.

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

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