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. 2020 Apr 27;10(5):830. doi: 10.3390/nano10050830

Figure 1.

Figure 1

(a) Schema of the section of a supported membrane with a single layer graphene transferred on top of it, (b) calculated Raman amplification with Al2O3 (red triangles) or air (green circles) as the dielectric layer for 488 nm laser excitation, (c) scanning electron microscopy (SEM) images of an alumina supported membrane with h ≈ 200 nm.