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Affinity-mediated sorting order reversal of single-walled carbon nanotubes in density gradient ultracentrifugation

机译:密度梯度超速离心的单壁碳纳米管的亲和介导的分拣顺序逆转

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摘要

Sorted single-walled carbon nanotubes (SWNTs) are of paramount importance for their utilization in high-end optoelectronic applications. Sodium cholate (SC)-based density gradient ultracentrifugation (DGU) has been instrumental in isolating small diameter (d(t)) SWNTs. Here, we show that SWNTs wrapped by flavin mononucleotide (FMN) as a dispersing agent are sorted in DGU, and show sorting order reversal behavior, departing from prototypical SC-SWNT trends. Larger d(t) SWNTs are sorted in lower density (rho), and buoyant rho distribution of FMN-SWNT ranges from 1.15-1.25 g cm(-3). Such a nanotube layering pattern originates from both the binding affinity between FMN and SWNT and the less-susceptible hydrated volume of remote phosphate sidechains of FMN according to nanotube d(t) change.
机译:分类的单壁碳纳米管(SWNT)对于它们在高端光电应用中的利用至关重要。 基于胆碱(SC)的密度梯度超速离心(DGU)在隔离小直径(D(T))SWNT时一直有助于仪器。 在这里,我们表明用黄素单核苷酸(FMN)包裹的SWNT作为分散剂在DGU中分类,并显示排序顺序逆转行为,脱离原型SC-SWNT趋势。 较大的D(t)SWNT在较低的密度(RHO)中分类,并且FMN-SWNT的浮力分布范围为1.15-1.25g cm(-3)。 根据纳米管D(t)变化,这种纳米管分层图案来自FMN和SWNT之间的结合亲和力和FMN的远程磷酸盐侧面的较低的水合体积。

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