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I like where they say "a sheet that is only a bit over a single atom thick, due to the angles between its chemical bonds" it's funny that material science has a

I like where they say "a sheet that is only a bit over a single atom thick, due to the angles between its chemical bonds" it's funny that material science has achived ultimate precision, but it can only be talked about in general terms Is there any exact way to describe the thickness of molebdium disulfide sheets?, beyond "a bit over one atom thick" clearly they are etching parts of the sheet, and somehow attaching leads, but is it done strictly in two dimensions, ie: litteral, flat land?

fc417fc802 2y ago
> Is there any exact way to describe the thickness of molebdium disulfide sheets? It's the same set of issues that you'll run into if you try to precisely quantify the thickness of a sheet of printer paper. It really depends on what you mean when you ask the question. The geometry of the electron shell, the minimum theoretical width once assembled into the theoretically optimal sheet, the impact of various imperfections in practice, the potential for more than a single layer to exist (and the associated averages), and a number of other things that aren't immediately coming to mind. It's an issue of precision on the part of the party asking the question. We usually work on scales that are so large that such details aren't meaningful (if you can even measure them in the first place).
roywiggins 2y ago
Looks like a monolayer is about a nanometer thick. https://www.acsmaterial.com/monolayer-molybdenum-disulfide.html https://www.acsmaterial.com/monolayer-molybdenum-disulfide.h...