合作客戶/
拜耳公司 |
同濟(jì)大學(xué) |
聯(lián)合大學(xué) |
美國保潔 |
美國強(qiáng)生 |
瑞士羅氏 |
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石墨烯與磷脂之間的作用——結(jié)論、致謝！
來源：上海謂載 瀏覽 1007 次 發(fā)布時(shí)間:2021-11-11
結(jié)論
在本研究中，朗繆爾單層技術(shù)作為二維 方法適用于空氣-水/水界面 了解彼此之間互動(dòng)的性質(zhì)和方向 GO 和脂質(zhì)模型。 具有相同 18 碳烷基的五種脂質(zhì) 鏈，但故意選擇不同的頭組電荷 使可能的相互作用合理化。 實(shí)驗(yàn)結(jié)果 表明這些脂質(zhì)和 GO 之間的相互作用是明確的 受靜電相互作用支配。 當(dāng)這些脂質(zhì) 散布在空氣-GO 分散界面，GO 可以結(jié)合 或被吸附到單層帶正電荷的脂質(zhì)中 DODAB 和 DSEPC，增加平均分子面積。 然而，單層帶中性電荷的頭基 （磷酸膽堿）或帶負(fù)電荷的頭部基團(tuán)（磷酸和羧基）不吸附 GO，因?yàn)闆]有偏愛 靜電相互作用。 因?yàn)榱字?在生物系統(tǒng)中帶負(fù)電或中性電， GO 可能被細(xì)胞攝取到膜中 是由于 GO 和 磷脂，但通過膜的生物活性。
當(dāng) GO 被注入到 DODAB 和 DSEPC 帶正電荷單層，不同 發(fā)現(xiàn)了表面壓力的觀察結(jié)果。 GO 可以插入 單層 DODAB 以 20 mN/m 增加表面 壓力。 然而，GO 不能擴(kuò)散到與 即使在低得多的表面壓力下 DSEPC 單層 可能是由于屏蔽了乙基磷基團(tuán)。 GO 綁定到 DODAB 時(shí)的定向模型和 提出 DSEPC 單層來解釋不同的 GO在空氣-水界面的吸附行為。 建議采用“邊緣向內(nèi)”而不是“面向內(nèi)”的方向 描述 GO 納米片插入時(shí)的方向 DODAB 的單層。
作者信息
通訊作者
*電子郵件：rml@miami.edu (RML)。
筆記
作者聲明沒有競(jìng)爭(zhēng)性經(jīng)濟(jì)利益。
致謝
這項(xiàng)工作得到了 2012 年橋梁基金資助 邁阿密大學(xué)。
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