Two-dimensional extremely thin single-crystalline α-Si[sub 3]N[sub 4] microribbons

Hu, J. Q.; Bando, Y.; Sekiguchi, T.; Xu, F. F.; Zhan, J. H.
February 2004
Applied Physics Letters;2/2/2004, Vol. 84 Issue 5, p804
Academic Journal
Two-dimensional extremely thin single-crystalline α-Si[sub 3]N[sub 4] microribbons have been achieved in bulk via a thermal decomposition nitridation. The α-Si[sub 3]N[sub 4] microribbons have small thicknesses of ∼10–20 nm, large widths of ∼10–25 μm and long lengths ranging from several hundred micrometers to the order of millimeters, and have the same growth direction of [1010] crystallographic orientation and are enclosed by ±(0001) and ±(2110) facets. Room temperature cathodoluminescence from individual ribbons shows one intensive UV emission peak at ∼305 nm, and two weak and broad emission peaks at ∼540 and ∼735 nm, respectively. The form of α-Si[sub 3]N[sub 4] is expected not only to possess many interesting mechanical properties, but also to have different optical properties. © 2004 American Institute of Physics.


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