Selective functionalization and free solution electrophoresis of single-walled carbon nanotubes: Separate enrichment of metallic and semiconducting SWNT

被引：121

作者：

Kim, Woo-Jae ^{[1
]}

Usrey, Monica L. ^{[1
]}

Strano, Michael S. ^{[1
]}

机构：

[1] Univ Illinois, Dept Chem & Biomol Engn, Urbana, IL 61801 USA

来源：

CHEMISTRY OF MATERIALS | 2007年 / 19卷 / 07期

关键词：

D O I：

10.1021/cm061862n

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：1571 / 1576

页数：6

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