Industrial-scale separation of high-purity single-chirality single-wall carbon nanotubes for biological imaging

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作者
Yohei Yomogida
Takeshi Tanaka
Minfang Zhang
Masako Yudasaka
Xiaojun Wei
Hiromichi Kataura
机构
[1] Nanomaterials Research Institute,
[2] National Institute of Advanced Industrial Science and Technology (AIST),undefined
[3] CNT-Application Research Center,undefined
[4] National Institute of Advanced Industrial Science and Technology (AIST),undefined
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Single-chirality, single-wall carbon nanotubes are desired due to their inherent physical properties and performance characteristics. Here, we demonstrate a chromatographic separation method based on a newly discovered chirality-selective affinity between carbon nanotubes and a gel containing a mixture of the surfactants. In this system, two different selectivities are found: chiral-angle selectivity and diameter selectivity. Since the chirality of nanotubes is determined by the chiral angle and diameter, combining these independent selectivities leads to high-resolution single-chirality separation with milligram-scale throughput and high purity. Furthermore, we present efficient vascular imaging of mice using separated single-chirality (9,4) nanotubes. Due to efficient absorption and emission, blood vessels can be recognized even with the use of ∼100-fold lower injected dose than the reported value for pristine nanotubes. Thus, 1 day of separation provides material for up to 15,000 imaging experiments, which is acceptable for industrial use.
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