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This invention describes a gel-like material made of tiny silica particles that hold copper ions. These copper ions are released slowly over time to kill bacteria and fungi, specifically for treating citrus canker, preventing mold, and enriching soil. The claims specify that copper ions are bound in two ways within the silica nanogel and released over at least six months.
Why it matters: Since 2008, advancements in materials science and nanotechnology have made the precise engineering of sustained-release nanoparticles more achievable and cost-effective, potentially enhancing the claimed long-term, low-dose copper delivery. Stricter environmental regulations on agricultural chemicals also increase the value of formulations that reduce overall copper load.
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