News

Graphene nanoribbons - chiral or not?

Fabian's paper on growth of chiral nanoribbons out in J. Phys. Chem. C
text9862_en.png

We show that the precursor geometry controls whether we form regular armchair or chiral graphene nanoribbons (GNRs). On Cu(111), bianthryl precursors (dibromo-, dichloro-, or halogen-free bianthryl) unexpectedly yield chiral GNRs. Using atomically resolved noncontact atomic force microscopy (nc-AFM), we studied the growth mechanism in detail. In contrast to the nonplanar BA-derived precursors, planar dibromoperylene (DBP) molecules do form armchair GNRs by Ullmann coupling on Cu(111), as they do on Au(111). These results highlight the role of the substrate, precursor shape, and molecule–molecule interactions as decisive factors in determining the reaction pathway. Our findings establish a new design paradigm for molecular precursors and opens a route to the realization of previously unattainable covalently bonded nanostructures.

The results are published in the Journal of Physical Chemistry C

  • Published:
  • Updated:
Share
URL copied!

Related news

Risto Sarvas pitelee näppäimistöä olallaan ja katsoo hymyillen kameraan.
Research & Art Published:

A new podcast reveals how computer science is involved in pretty much everything

A new Finnish podcast explains how technology plays a key role in solving different kinds of problems
three models wearing candle headpieces and capes
Research & Art, Studies, University Published:

Fashion Design graduates among finalists in the Designers' Nest competition

Graduates from Fashion Design are once again paving the way for Finnish fashion design with their innovative and unique collections.
Tummien värialueiden lomassa glitterimäisiä sinisiä ja kultaisia raitoja, kuva Valeria Azovskaya
Research & Art, University Published:

Aalto granted 15.4 million euros for profiling

The objective is to produce revolutionary expertise in four areas: AI-driven healthcare, Computational imagination, Co-innovating circular systems and Leading for creativity
Taiteellinen kuva panssaroidusta superhydrofobisesta pinnasta, joka kestää iskuja ja hylkii nesteitä tehokkaasti. Kuva: Juha Juvonen.
Cooperation, Press releases, Research & Art Published:

New funding to commercialise high-tech liquid-repelling coatings

New funding to get damage-resistant, liquid-repelling surfaces out of the laboratory and onto solar panels, skis, and more