| dc.description.abstract | The field of nanotechnology has witnessed amazing development in the past decade. In particular, studies of low-dimensional materials, including carbon nanotubes (CNTs), graphene, and other two-dimensional (2D) materials, have evolved into a fast-growing area. From insulating hexagonal boron nitride, semiconducting transition metal dichalcogenides, to semimetallic graphene and CNTs in either semiconducting or metallic forms, these materials exhibit unique electronic and optoelectronic properties that are especially fascinating. With the advances in their synthesis and device fabrication techniques, low-dimensional materials have been demonstrated as promising candidates for a variety of applications, such as battery anode materials, light emitting diodes, electric circuits, solar cells, etc.
This dissertation focuses on the optoelectronic and bioelectronic applications of low-dimensional materials. We start by investigating the optical and thermal properties of CNTs and curled graphene ribbons, followed by the photocurrent generation mechanisms in 2D materials and their heterostructure. Finally, we bring the low-dimensional materials into a biological environment by studying single-molecule interaction between CNT and DNA. These novel low-dimensional materials provide new opportunities for future optoelectronic and bioelectronic devices. | |
