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发帖数: 623 | 1 Graphene oxide的高度到底是多少，我在mica上测出来是1.1nm
这篇paper上计算的高度是0.78nm,但是实际测量值也不是0.78nm
http://pubs.acs.org/doi/abs/10.1021/jp060936f?
journalCode=jpcbfk&quickLinkVolume=110&quickLinkPage=8535&volume=110
然后给出的解释也不是特别给力～
The fact that the averaged height minima of the sheets reflected by the
histogram are higher than dGO is due to following reasons: (i) roughness
on
scales smaller than the AFM probe (20 nm) is not detected by this
measurement and will lead to an overestimate of the sheet thickness, as
the
tip cannot reach the lowest points in this case, and (ii) the value of dGO
is determined from layered bulk material. For a single functionalized
graphene sheet on top of an HOPG substrate, however, the van der Waals
force
is reduced. |
|
