Affinity-mediated sorting order reversal of single-walled carbon nanotubes in density gradient ultracentrifugation. (7th September 2016)

• Record Type: Journal Article
• Authors: Jang, Myungsu; Kim, Somin; Jeong, Haneul; Ju, Sang-Yong
• Is Part Of: Nanotechnology. Volume 27:Number 41(2016)
• Publication Date: 2016-09-07
• Subjects: single-walled carbon nanotube -- separation -- density gradient ultracentrifugation -- buoyant density -- binding affinity; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/0957-4484/27/41/41LT01
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: 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 ( ρ ), and buoyant ρ 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.