Department of Chemistry and Richard E. Smalley Institute for Nanoscale Science and Technology, Rice University , 6100 Main Street, Houston, Texas 77005, United States.
Anal Chem. 2014 Nov 18;86(22):11018-23. doi: 10.1021/ac502365w. Epub 2014 Oct 31.
The recent application of density gradient ultracentrifugation (DGU) for structural sorting of single-walled carbon nanotube samples has created a need for highly selective extraction of closely spaced layers formed in the centrifuged tube. We describe a novel computer-controlled device designed for this purpose. Through the use of fine needles, systematic needle motions, and slow flow rates, multiple sample layers can be aspirated under program control with minimal cross contamination between layers. The fractionator's performance is illustrated with DGU-sorted samples of single-walled carbon nanotubes.
最近，密度梯度超速离心（DGU）在单壁碳纳米管样品的结构分类中的应用，需要对离心管中形成的紧密间隔层进行高度选择性的提取。我们描述了一种用于此目的的新型计算机控制设备。通过使用细针、系统的针运动和缓慢的流速，可以在程序控制下抽吸多个样品层，并且层与层之间的交叉污染最小。该分馏器的性能通过 DGU 分离的单壁碳纳米管样品进行了说明。
