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Tiras de folhas delgadas sonicar durante 5 min cada em acetona ultrapura, álcool isopropílico, metanol, e água Dl, respectivamente. Seque com ultrapura N 2 gás, cobrindo parcialmente um copo com folha de alumínio e injectaring uma N2 bico na abertura. Fluxo de gás até que todo o líquido tenha evaporado.

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