​PhD Mid-term Seminar Series: Designer spin states in nanographenes "seen" by scanning probe microscopy techniques

CIC nanoGUNE Seminars

Speaker

Francisco Romero
Nanoimaging group, nanoGUNE

When

2023/10/09
11:00

Place

nanoGUNE seminar room, Tolosa Hiribidea 76, Donostia - San Sebastian

Host

Nacho Pascual

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The emergence of spin states in triangular-shaped graphene fragments with zig-zag edges (triangulenes) is a conceptually attractive theoretical proposal from decades ago. Thanks to the recent development of on-surface synthesis strategies, triangulene nanostructures showing magnetic interactions can now be fabricated on metal substrates with atomic precision.

In this work, we present the synthesis and characterization of two nitrogen doped nanographenes on Au(111) surface: aza-[5]-triangulene (A5T) and π-extended-aza-triangulene (ex-AT). Theoretical models predict such structures to have more than two unpaired electrons, which could result in large spin states and/or magnetic interactions. A combination of scanning probe microscopy techniques with advanced theoretical models was used to demonstrate the spin state of the molecules on surface.