Selective functionalization and free solution electrophoresis of single-walled carbon nanotubes: Separate enrichment of metallic and semiconducting SWNT
Selective functionalization and free solution electrophoresis of single-walled carbon nanotubes: Separate enrichment of metallic and semiconducting SWNT
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DOI：
10.1021/cm061862n
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发表时间：
2007-04-03
影响因子：
8.6
通讯作者：
Strano, Michael S.
中科院分区：
文献类型：
--
作者：
Kim, Woo-Jae;Usrey, Monica L.;Strano, Michael S.
利用对羟基苯重氮盐对金属单壁碳纳米管（SWNT）进行45℃高选择性功能化。碱性溶液中的去质子化作用在功能化的SWNT上引起负电荷，用于电泳分离。我们将这一概念应用于利用诱导的电泳迁移率差异分别富集金属和半导体组分。自由溶液电泳可将反应样品选择性地分为非迁移和负迁移两部分。拉曼光谱和UV-vis-nIR吸收光谱都证实了反应和未反应的SWNT的分离，并且退火后，金属和半导体SWNT分别以两个不同的组分富集。
p-Hydroxybenzene diazonium salt was utilized to selectively functionalize metallic single-walled carbon nanotubes (SWNT) at 45 degrees C with high selectivity. Deprotonation in alkaline solution induces a negative charge on the functionalized SWNT for electrophoretic separation. We applied this concept to enrich metallic and semiconducting fractions separately using the induced differences in electrophoretic mobilities. Free solution electrophoresis was utilized to separate selectively reacted samples into nonmobile and negative electrophoretic mobility fractions. Raman spectroscopy and UV-vis-nIR absorption spectroscopy confirm both the separation of reacted and unreacted SWNT, and after annealing, the enrichment of metallic and semiconducting SWNT respectively in two distinct fractions.