Date of Graduation

Spring 2018

Document Type

Honors Research Project

Degree Name

Bachelor of Science

Major

Physics

Research Sponsor

Dr. Jutta Luettmer-Strathmann

First Reader

Dr. Robert Mallik

Second Reader

Dr. Ben Hu

Abstract

Thiophenes are π-conjugated organic molecules with applications in electronic devices. Alpha-sexithiophene (α-6T) is a rod-like molecule consisting of six thiophene rings. Previous experimental research has shown that vapor deposition of rod-like organic molecules onto substrates at different temperatures yields films with a range of phases. These include smectic liquid crystalline phases, which have been shown to promote anisotropic charge carrier mobility. In this work, we use a course-grained model for α-6T, representing it as a chain of discotic particles with fixed bond lengths and fixed bond angles. We perform Monte Carlo simulations of multiple chains introduced at different rates in vacuum near two adsorbing surfaces. These simulations are not chemically realistic, instead focusing on the general features of the physical systems. The goal of this work is to simulate vapor deposition of materials on a substrate over a range of temperatures and deposition rates and to investigate the resulting structures.

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