Compositions of nanoparticles are stabilized by capping agents which are composed of methacrylic acid and n-butylmethacrylate random copolymers having hydrophobic and hydrophilic moieties and low molecular weight. The nanoparticle compositions have low viscosity, high nanoparticle loading and may be selectively applied to substrates by methods such as inkjet, aerosol and electrospinning.