Date of Award

Summer 2009

Document Type

Dissertation

Degree Name

Doctor of Philosophy in Electrical Engineering - (Ph.D.)

Department

Electrical and Computer Engineering

First Advisor

Haim Grebel

Second Advisor

Andrei Sirenko

Third Advisor

Leonid Tsybeskov

Fourth Advisor

Kenneth Sohn

Fifth Advisor

Durgamadhab Misra

Abstract

Growth of individual carbon nanotube (CNT) intra-connects (bridges) between two prefabricated electrodes is a great challenge and a pre-requisite to the development of single electron devices. In this thesis, CNT intra-connects were fabricated and studied. Later on, the intra-connects were deposited with electrically conductive polymer (ECP) in the realization of CNT/ECP hybrids.

The process started by realizing two electrodes with sharp end on a silicon wafer using e-beam lithography. The intra-connects were then grown by use of chemical vapor deposition (CVD) technique. The intra-connects were later electroplated by various conductive polymers. The morphology, electrical conductivity of these intra-connects as well as their Raman spectroscopy signatures were studied. Scanning electron microscopy (SEM) was also employed. The CNT intra-connects were well-aligned from tip to tip. Their Raman spectra indicated the existence of CNT channels between metal tips and nowhere else on the wafer. Enhancement of photoconductance has been shown to correlate with a novel negative differential resistance (NDR) effect. Electroplated intraconnects exhibited unique properties both for multi-walled and single-walled carbon nanotube channels.

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