||Because the gold nanoparticles (AuNPs) have unique optical properties depending on the particle size as noble metals, they are applicable to make a variety of optical devices. For a broad spectrum of applications, it is essential to carry out a solution processing, which is more comfortable to do it in aqueous solution. However, it is difficult to fabricate stable AuNPs in aqueous solution Because of their strong hydrophobic surface. Here, we report highly stable AuNPs in aqueous solution, which is non-covalently functionalized by their encapsulation using polymerized surfactants. The non-covalent functionalized AuNPs are highly stable in aqueous solution and remain their nanostructure after harsh process such as freeze drying, which is confirmed by UV-vis spectrum and small angle X-ray scattering.