Abstract
High-temperature exposure of a Mo(110) surface to borazine (HBNH)3leads to the formation of two distinctly different self-assembling nanostructures. Depending on the substrate temperature during preparation, either well-aligned, ultra-thin boron nanowires or a single-layer stripe structure of hexagonal boron nitride forms. Both structures show one-dimensional (1D) characteristics, but in directions perpendicular to each other. It is also possible to grow the two phases in coexistence. The relative weights are controlled by the sample temperature during preparation.
Highlights
High-temperature exposure of a Mo(110) surface to borazine (HBNH)3 leads to the formation of two distinctly different self-assembling nanostructures
The atomic lattices of stable inorganic materials are usually too narrowly spaced for such applications, and research has focused on surfacesuperstructures with periodicities in the one to a few nanometer range, which can serve as templates e.g., for the formation of ordered layers of well-separated molecules, or for the growth of ordered metallic deposits and monodisperse metallic clusters [1]
On Ni(111), which has a lattice spacing that is nearly equal to that of hexagonal boron nitride (h-BN) (2.49 Afor nickel, 2.50 Afor h-BN), the chemical vapor deposition (CVD) of benzene-like borazine (HBNH)3 at 1050 K leads to very uniform epitaxial monolayers [6]
Summary
High-temperature exposure of a Mo(110) surface to borazine (HBNH)3 leads to the formation of two distinctly different self-assembling nanostructures. A common aspect of these boron nitride layers is that, as a result of the high preparation temperatures, they represent chemically inert and highly temperatureresistant nanotemplates for the production of ordered molecular films or monodisperse metal clusters. We report two new self-assembling nanostructures grown by high-temperature CVD of borazine on the (110) surface of bcc molybdenum.
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