Improved electrophoretic deposition of vertical single wall carbon nanotubes with nanoscopic electrostatic lenses

Document Type

Article

Publication Date

3-1-2020

Abstract

Under certain conditions, electrophoretic deposition (EPD) of single-wall carbon nanotubes (SWCNTs) onto metal at the base of nanoscale insulating windows can result in a single SWCNT per window, bonded at one end to the metal. During EPD charge, buildup on the insulator creates electrostatic lenses at the windows that control the trajectory of the SWCNTs. The aim is to develop a reproducible process for deposition of individual vertically oriented SWCNTs into each window to enable novel devices. The length of the SWCNTs is shown to be the most critical parameter in achieving results that could be used for devices. In particular, single nanotube deposition in windows by EPD was achieved with SWCNTs with lengths on the order of the window depth. By performing current vs voltage (IV) measurements against a platinum wire in a phosphate buffer and by modeling the data, the presence of the nanotube can be detected, the contact interface can be studied, and the nanotube's viability for device applications can be determined. These results provide a basis for process integration of vertical SWCNTs using EPD.

Identifier

85082885104 (Scopus)

Publication Title

Micromachines

External Full Text Location

https://doi.org/10.3390/mi11030324

e-ISSN

2072666X

Issue

3

Volume

11

Grant

FA8650-08-1-7825

Fund Ref

Defense Advanced Research Projects Agency

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