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中文摘要：
近年来，碳纳米管（CNTs）在生物领域得到了广泛应用。经聚合物、DNA、蛋白质等大分子修饰后，CNTs的比表面积显著增大，且生物相容性好，在生理溶液中的溶解性及其对目标物的选择性结合能力均明显提高。本研究将超枝化阳离子聚合物聚乙烯亚胺（PEI）通过静电作用吸附在羧基化的多壁碳纳米管（MCNTs）表面，得到比表面积大，生物相容性好，
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