Structural modification and coalescence of single-walled carbon nanotubes by femtosecond laser irradiation
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초록
내용
The inter-allotropic structural transformation of sp2 structured nanocarbon holds significant potential for both fundamental research and scalable nanomanufacturing. Traditionally, such transformations require extremely high temperatures or high-energy irradiation, often leading to destructive and time-consuming processes. In this study, we present a novel method for engineering the molecular structure of single-walled carbon nanotubes (SWNTs) using femtosecond laser irradiation. This innovative technique enables effective coalescence between SWNTs, transforming them into various allotropic nanocarbon structures, including double-walled, triple-walled, and multi-walled nanotubes, as well as forming linear carbon chains. The resultant nanocarbon network demonstrates an extraordinarily strong coalescence-induced mode in Raman spectra and a two-fold enhancement in electrical conductivity. Our findings suggest a powerful approach for engineering sp2 carbon allotropes and their junctions.