Mesoporous silica and vegetal extracts combined as sustainable stone heritage protection against biodeterioration
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Researchers developed an eco-friendly method to protect historic stone buildings and sculptures from fungal damage. They trapped natural plant oils (from oregano and thyme) inside tiny nano-containers made of silica, which slowly releases the antimicrobial compounds over time. When tested on marble samples, this coating prevented fungal growth for two months without harmful chemicals, making it safe for both the environment and workers preserving cultural heritage.