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中文摘要：
通过在金纳米通道阵列膜上修饰聚Ⅳ．异丙基丙烯酰胺（PNIPAm）分子，发展了一种温度敏感的纳米通道阵列膜．以荧光素钠和水溶性量子点为探针，考察了这种膜在不同温度下的渗透性．结果表明，该PNIPAm分子修饰的膜能够可逆地响应外界温度的变化，使纳米通道的孔径大小被改变，进而影响膜的渗透性．当温度为25℃（〈低临界溶液温度，LCST）时，荧光探针的渗透较慢，甚至基本上被阻止，这是因为PNIPAm分子呈现膨胀构象使通道尺寸变小所致；而当温度为40℃（〉LCST）时，荧光探针的渗透明显加快，这是因为PNIPAm分子呈现紧缩构象使通道尺寸变大所致．这种温度敏感的金纳米通道阵列膜的渗透性可以被可逆地调控，有望用于纳米级阀门等装置．
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