Used primarily as a surface modifier in nanotechnology, especially for functionalizing gold nanoparticles and surfaces. Its long hydrocarbon chain with a terminal thiol group enables strong self-assembly into monolayers, providing stability and controlled surface properties. Commonly applied in biosensors, molecular electronics, and colloidal gold stabilization due to its ability to form dense, ordered films. Also utilized in corrosion inhibition and hydrophobic coatings because of its non-polar tail and strong substrate adhesion.