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Method for electrical field assisted molecular combing of carbon nanotubes and other linear molecules

IP.com Disclosure Number: IPCOM000130474D
Publication Date: 2005-Oct-25
Document File: 4 page(s) / 254K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for electrical field assisted molecular combing of carbon nanotubes and other linear molecules. Benefits include improved functionality and improved performance.

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Method for electrical field assisted molecular combing of carbon nanotubes and other linear molecules

Disclosed is a method for electrical field assisted molecular combing of carbon nanotubes and other linear molecules. Benefits include improved functionality and improved performance.

Background

      Molecules, such as deoxyribonucleic acid (DNA) and carbon nanotubes (CNTs) must be patterned and aligned in a controlled manner for use in technological applications. One conventional method of controlling the pattern/alignment is molecular combing. A liquid solution is used in a process that immobilizes electrically charged molecules. Capillary force aligns the molecules as a result of the liquid contact line movement. However, this process increases the complexity of the semiconductor process and impairs its controllability.

      A contact line is the edge of the droplet where the liquid, vapor, and solid phases meet. The contact line exerts a local force on the molecules perpendicular to the liquid front.

General description

              The disclosed method increases the interaction of linear molecules, such as carbon nanotubes and DNA, with a substrate during molecular combing. The key elements of the method include the following:

•             Electrostatic charged molecules in a solution, such as DNA
•             Neutral molecules, such as CNTs, that are functionalized with a charged molecule

•             Neutral linear molecules that are functionalized with a charged molecule (or a functional group) at a specific location, such as at the end of a CNT

•             Application of a bias to a substrate, which increases the affinity of the substrate to the molecules of interest, such as DNA functionalized nanotubes

•             Partially immobilized linear molecules that are stretched straight and aligned by molecular combing

•             Control the location of aligned l...