biostudies-literatureUnknown8(48)Chuang THSingle-flake monolayer WSe₂ holds significant promise for advanced optoelectronic applications at the quantum scale, leveraging its direct band gap electronic properties that are distinct from those of the bulk material. Probing momentum-resolved electronic structure at the single-flake level remains a key challenge in two-dimensional (2D) materials research due to the spatial mismatch between micron-scale flakes and conventional photoemission techniques. Here, we use momentum microscopy (MM) to investigate the local band structure of monolayer WSe₂ flakes grown by metal-organic chemical vapor deposition (MOCVD) on bilayer graphene (BLG) using Helium-I radiation. Despite differing crystallographic orientations, all flakes exhibit identical energy-momentum (E-k) disperACS applied nano materials23164-23170https://www.ebi.ac.uk/biostudies/studies/S-EPMC12687315biostudies-literatureMomentum Microscopy Investigation of the Local Band Structure of Monolayer WSe<sub>2</sub> Flakes: Toward Optoelectronic Device in Quantum Size.PMC12687315Shih CKWei HWZhang FRobinson JAHsu CCLi YLin YCHsu WTChuang THJhuang JSWei DHChiu WSDong CfalseMomentum Microscopy Investigation of the Local Band Structure of Monolayer WSe<sub>2</sub> Flakes: Toward Optoelectronic Device in Quantum Size.Single-flake monolayer WSe₂ holds significant promise for advanced optoelectronic applications at the quantum scale, leveraging its direct band gap electronic properties that are distinct from those of the bulk material. Probing momentum-resolved electronic structure at the single-flake level remains a key challenge in two-dimensional (2D) materials research due to the spatial mismatch between micron-scale flakes and conventional photoemission techniques. Here, we use momentum microscopy (MM) to investigate the local band structure of monolayer WSe₂ flakes grown by metal-organic chemical vapor deposition (MOCVD) on bilayer graphene (BLG) using Helium-I radiation. Despite differing crystallographic orientations, all flakes exhibit identical energy-momentum (E-k) disper2025-01-01T00:00:00Z2025 Dec2026-06-06T00:25:46.97Z2026-05-24T03:11:11.769ZS-EPMC126873154137748110.1021/acsanm.5c04341