Graphene-Diamond Composite Solar Sail Architecture for Propellant-Free Cislunar, Interplanetary, and Interstellar Transport: A Defensive Publication Establishing Prior Art

This defensive publication places in the public domain an integrated spacecraft architecture combining graphene-diamond composite membranes as ultra-low areal density solar sails, polycrystalline diamond piezoelectric energy harvesting from solar radiation pressure, and continuous-illumination trajectory design. The integration may substantially reduce or eliminate electrochemical energy storage requirements across cislunar, interplanetary, and interstellar mission profiles. Four embodiments are disclosed: cislunar cycler, inner solar system transit, perihelion-boost outer planet trajectories, and laser-driven interstellar adaptation. All embodiments are dedicated to the public domain. No ownership is claimed over constituent technologies. Publication purpose: prior-art establishment preventing subsequent patent enclosure of the disclosed integrated architecture. Keywords: solar sail, graphene, piezoelectric, diamond membrane, cislunar, propellant-free, prior art, defensive publication