Hypothetical energy flow in piezoelectrotrophy. This schematic depicts the proposed transduction pathway for piezoelectrotrophy, converting mechanical energy (left input) to bioavailable chemical energy (right output) via nano-bio interface processes. Mechanical stress induces shape changes in piezoelectric materials, causing charge separation and the generation of electrons (e⁻) and protons (H⁺) through the piezoelectric effect. Captured charges transfer across the microbial membrane via conductive nanowires, outer membrane cytochromes, or soluble mediators, establishing a membrane potential and proton gradient. The membrane potential and proton gradient drive ATP synthesis by ATP synthase or the reduction of electron carriers like NAD(P)H, integrating with cellular metabolism for growth and maintenance. The mechanism distinguishes piezoelectrotrophy from established paradigms by utilizing ubiquitous mechanical forces in energy-limited environments.