Polyaminoboranes [N(R)H-BH2]n (1: R = H, 2: R = Me) were pyrolyzed on a range of substrates: silicon, metal foils (stainless steel, nickel, and rhodium), and sapphire wafers, as well as on Al2O3 and AlN powders. The pyrolysis of 2 on a Si-wafer resulted in porous nanostructures containing hexagonal-boron nitride (h-BN). In the case of 1 or H3N·BH3 as precursor, using rhodium foil as substrate a...

Abstract The generation of high-order harmonics in finite, hexagonal nanoribbons is simulated. Ribbons with armchair and zig-zag edges are investigated by using a tight-binding approach only nearest-neighbor hopping. By turning an alternating on-site potential off or on, the system describes for example graphene boron nitride, respectively. incoming laser pulse linearly polarized along ribbons....

Cutting and folding 2D systems is one of the explored paths to tune physical chemical properties in one-atom-thick matter. Contrary graphene, boron nitride (BN) nanoribbons are difficult obtain, folded BN nanoribbon structures have not been reported yet. Here, we show that pressure application multiwalled nanotubes leads different types tube internal organizations including formation folds. The...

High-harmonic generation (HHG) in graphene heterostructures, consisting of metallic nanoribbons separated from a sheet by either few-nanometer layer aluminum oxide or an atomic monolayer hexagonal boron nitride, is investigated. The amplify the near-field at relative to externally applied pumping, thus allowing observation third- and fifth-harmonic carbon modest pump powers mid-infrared. depend...

Using Fe-Au and Ni-Au thin films as catalysts for the VLS growth of Bi 2 Se 3 nanoribbons, we obtain two distinct morphologies in the case of Fe-Au thin films and three distinct morphologies in the case of Ni-Au thin films. For Fe-doped Bi 2 Se 3 nanoribbons, we observe wide nanoribbons (Fig. S1(c,d)) and narrow, long nanoribbons (Fig. S1(e,f)). For Ni-doped Bi 2 Se 3 nanoribbons, we observe wi...