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Seperation of SWNT via hydroxyl group reaction

Created by: Hyun Jae Kim

Self-Selective Separation of Single-Walled Carbon Nanotubes via a Hydroxyl Group Reaction

 We developed a method of separating metallic single-walled carbon nanotubes (SWNTs) from semiconducting nanotubes (NTs) in suspension using a sodium hydroxide treatment and centrifugation. The semiconducting NTs remained suspended in the solvent while the metallic NTs precipitated out. This self-selective separation occurred because the metallic SWNTs bonded to hydroxyl groups due to strong surface hydrogen-bond interactions. We fabricated thin-film transistors based on random networks of semiconducting SWNTs on a glass substrate and obtained an on/off current ratio of 6.25 x 104

DOI: https://doi.org/10.1149/1.3236389

 Figure 6 shows the current–voltage I-V curve characteristics of the SWNT TFT as a function of drain–source voltage VDS to illustrate the electrical characteristics of the semiconducting SWNT TFT in detail. The gate voltage VG varied over the 10 V range. The SWNT TFT behaved normally as a p-channel transistor. The on/off current ratio increased rapidly as VDS increased. The inset shows that the maximum transconductance gm = dID/dVG was about 6.4 x 10-11 A/V, and the on/off current ratio was approximately 6.25 x 104. The subthreshold slope {S = dV/ [d(log10 ID)]} was about 700 mV/decade at a VDS of 0.7 V. Thus, this method could be very useful for random networks of SWNT electronics.

Cite this article

Hyun Jae, Kim. Seperation of SWNT via hydroxyl group reaction, Encyclopedia, 2020, v1, Available online: https://encyclopedia.pub/498