求翻译：Since both titania and graphene oxide are negatively charged, positively charged PEI was deposited between graphene oxide layer是什么意思？

待解决

悬赏分：1 - 离问题结束还有

Since both titania and graphene oxide are negatively charged, positively charged PEI was deposited between graphene oxide layer

问题补充：

匿名	2013-05-23 12:26:38 由于二氧化钛和石墨烯氧化负电，正电裴被存放石墨烯氧化层之间

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