Large-area monolayer WS2 is a desirable material for applications in next-generation electronics and optoelectronics. However, the chemical vapour deposition (CVD) with rigid and inert substrates for large-area sample growth suffers from a non-uniform number of layers, small domain size and many defects, and is not compatible with the fabrication process of… (More)
The growth of single-walled carbon nanotubes (SWCNTs) with predefined structure is of great importance for both fundamental research and their practical applications. Traditionally, SWCNTs are grown from a metal catalyst with a vapor-liquid-solid mechanism, where the catalyst is in liquid state with fluctuating structures, and it is intrinsically… (More)
a fruitful discussion regarding the environmental effect. I am grateful to the former and present group members including Masaru Furukawa who was a very kind tutor for my first year life acknowledge a financial support from the MEXT scholarship. I am thankful to many other people who contributed to this thesis in one form or another.