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Unravelling the multilayer growth of the fullerene C60 in real time.


ABSTRACT: Molecular semiconductors are increasingly used in devices, but understanding of elementary nanoscopic processes in molecular film growth is in its infancy. Here we use real-time in situ specular and diffuse X-ray scattering in combination with kinetic Monte Carlo simulations to study C60 nucleation and multilayer growth. We determine a self-consistent set of energy parameters describing both intra- and interlayer diffusion processes in C60 growth. This approach yields an effective Ehrlich-Schwoebel barrier of EES=110?meV, diffusion barrier of ED=540?meV and binding energy of EB=130?meV. Analysing the particle-resolved dynamics, we find that the lateral diffusion is similar to colloids, but characterized by an atom-like Schwoebel barrier. Our results contribute to a fundamental understanding of molecular growth processes in a system, which forms an important intermediate case between atoms and colloids.

SUBMITTER: Bommel S 

PROVIDER: S-EPMC4272254 | biostudies-literature | 2014 Nov

REPOSITORIES: biostudies-literature

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Unravelling the multilayer growth of the fullerene C60 in real time.

Bommel S S   Kleppmann N N   Weber C C   Spranger H H   Schäfer P P   Novak J J   Roth S V SV   Schreiber F F   Klapp S H L SH   Kowarik S S  

Nature communications 20141105


Molecular semiconductors are increasingly used in devices, but understanding of elementary nanoscopic processes in molecular film growth is in its infancy. Here we use real-time in situ specular and diffuse X-ray scattering in combination with kinetic Monte Carlo simulations to study C60 nucleation and multilayer growth. We determine a self-consistent set of energy parameters describing both intra- and interlayer diffusion processes in C60 growth. This approach yields an effective Ehrlich-Schwoe  ...[more]

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