Four hybrid configuration pesticide electrical sensors were synthesized by incorporating gold nanoparticles AuNPs on pore-like, mud-like, horizontally aligned nanopillars (HA-Si nanopillars), and Si quantum dots (SiQDs) silicon structures. Laser-induced etching; at different power densities, was employed to synthesize the Si nanostructures. The hybrid configurations were produced via an easy, low cost and fast dipping process in an aqueous solution of HAuCl4. Two configurations of pesticide electrical sensors: Al/Si nano/n c-Si/Al and Al/AuNPs/Si nano/n c-Si/Al were prepared and studied. Electrical properties of the sensors with and without chlorpyrifos pesticide were recorded at room temperature. The results displayed sensors’ performance affected by Au nanoparticles' grain size, deposition manner, specific surface area (SSA) of AuNPs, and morphological features of the Si nanostructure. A significant improvement in sensitivity and stability of the hybrid configuration were achieved. The pore-like hybrid configurations sensors showed better performance than the hybrid configuration sensors; due to the higher integrated SSA and the deposition of AuNPs on pore boundaries, in addition to the high pores density.