If you were referring to a different "solid" topic (like solid-state batteries or solid-phase extraction), these frequently cited papers often appear in searches with high-resolution "Graphical Abstract" downloads around that same size (265 KB):

This paper focuses on environmental engineering and the reduction of organic matter in sewage sludge.

The study uses impedance spectroscopy to analyze how fluorine vacancies migrate across grain boundaries in tysonite-type structures.