NanoBrand offers the service of modification of our Gold and Silver nanoparticles bare (citrate) surface, to create the nanoparticles with targeted properties for diverse applications. Nanoparticles surfaces can be coated with a wide selection of substances, including organic molecules, polymers, biomolecules (such as antibodies or peptides), inorganic or metallic layers, etc. These coatings can form single or multiple layers to achieve specific functionalities. Coatings can be engineered for specific end uses, such as drug delivery, antimicrobial activity, or enhanced optical, catalytic, or protective properties. Surface chemistry can be tailored to impart desired properties such as specific charge (anionic, cationic, neutral), which governs interactions with cells, proteins, and other materials, as well as hydrophobicity, or biocompatibility. Functional groups, targeting ligands, and reporter molecules can be conjugated to the surface to enable targeting, sensing, or enhanced stability. Tailoring both nanoparticle morphology and surface coatings is essential for maximizing performance, safety, and specificity in advanced applications