The performance of materials in many engineering applications is significantly influenced by their mechanical behavior. Due to its special nanoscale structure and potential for a variety of uses, including microelectronics and sensors, porous silicon has become a material of interest. To realize its full potential, it is essential to comprehend and improve its mechanical qualities. Polymer treatment is a viable method for enhancing porous silicon's mechanical properties. Because of their mechanical adaptability and plasticity, polymers are a good choice for altering the characteristics of porous silicon. We seek to examine the effects of various treatments on the elastic properties of porous silicon, such as stiffness and resilience. In this study, we conduct a thorough analysis of the elastic characteristics of porous silicon that has not been treated and porous silicon that has been modified using polymers. With chances for innovation and technological advancement, our study aims to offer useful insights into the possible enhancements and applications of these materials in the fields of materials science and engineering. The chapter describes the theoretical calculation of elastic properties of porous silicon and polymers treated porous silicon. The Elastic properties of porous silicon and polymers treated porous silicon were also depending upon the porosity. It is concluded that the theoretical calculation is a simple way to confirm the experimental results.

Porous Silicon (PS), Polymers treated porous silicon, Elastic Property, Etching time, PMMA & PVC Concentrations