Twisted Trilayer Graphene
Twisted trilayer graphene (TTG) stacked on hBN and transferred onto a Si/SiO₂ substrate, forming a graphene-based 2D heterostructure with controlled twist angles (θ1,2 = −θ2,3 = θ).
TFM imaging clearly visualizes the moiré superlattice (λₘₒᵢᵣₑ ≈ 14.5 nm) and further resolves the atomic lattice, approaching graphene’s ~0.25 nm lattice constant.
Scan Conditions
- System: NX20
- Scan Mode: TFM
- Scan Size: 500 nm×500 nm, 200 nm×200 nm
- Scan Rate: 0.5 Hz, 0.4 Hz
- Pixels: 512×512
- Cantilever: PPP-FMR
(k=2.8 N/m, f=75 kHz)
*Sample courtesy: Jaime Díez Mérida, Federico Stramaglia, Johann Osmond and Carmen Rubio Verdú, ICFO - Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology, Spain
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