A New Era for Ultrafast Photonics: Two-Dimensional Mercury-Acetylide Frameworks for Near-Infrared Nonlinear Optics (IMAGE)
Caption
(a) Schematic illustration of the chemical structure of Hg–H2TPP. (b) PXRD patterns of experimental Hg–H2TPP-B and Hg–H2TPP-EB, along with calculated patterns for AA-stacking and AB stacking. (c) SEM image of an exfoliated sample with corresponding element mapping of (d) Hg, (e) C and (f) N; the scale bar for all images (c–f) is 10 μm. (g–i) AFM images illustrating three distinctive lines over the exfoliated samples. (j–l) Height profiles of the corresponding lines shown in (g–i), respectively. (m) TEM and (n) HR-TEM image of Hg–H2TPP-EB. HR-XPS spectra of (o) C 1s and (e) Hg 4f in Hg–H2TPP-EB.
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