View attachment 1327099
Evening all,
I have been working on FGR's Raman Shift Curves.
D = Defect band,
G = higher the intensity the higher the number of layers.
2D = Location at 2700 means there is not graphite,
Each layer of graphene is .34nm in thickness
I have added the Puregraph 5 & 20, and the November Product information sheet onto the Puregraph 10.
The Raman shift plot that was in the Capability statement has used a different light intensity reading, It would have been handy to add that one to as it was 1-7 layers. Nanene's Plot is also using different equipment so I cannot add it to the chart,
What we know from the previous information FGR has provided,
November Product Information sheet FGR graphene was 5-10nm in thickness / .34nm (layer thickness) = 15-30 layers.
this is represented on the chart with the light intensity @ 16000 (pink)
I do not understand why the original plots all run from zero, where the new plots start at around 400, then run on a slight upward direction.
In the new Product information sheet for the Puregraph Range, the company has stated the graphene is MLG,
I am going to assume the MLG is 10 layers in thickness as UoM have previously indicated this is what MLG is. alga's presentations also have MLG listed as 3-10 Layers.
Puregraph 10 (Blue) & 20 (Red) plots are very similar, with P20 having a slightly higher intensity = more layers, I can understand why it being a larger platelet graphene.
I wouldn't be surprised if Puregraph 10 (Green) is FLG / MLG,
Density of FGR graphene vs others
Versarien Nanene - 90% 10 layers or less, has a Tap Density of 162kg per m3
America Elements - 5 layer, has a Tap Density of 100kg per m3
FGR Puregraph 20 - has a Tap Density of 251kg per m3
FGR Puregraph 10 -has a Tap Density of 124kg per m3
FGR Puregraph 5 - has a Tap Density of 62kg per m3
With America Elements having a Tap Density of 100kg per m3 and being 5 layers in thickness, and Nanene being 10 layers in thickness with 162 kgs, Wouldn't this mean that Puregraph 5 is less than 5 layers in thickness ?
Puregraph 10 would be slightly more than 5 Layers but less than Nanene's 90% less than 10 layer, and
Puregraph 20 might be slightly more than 10 layers, or be majority 5-10 layer graphene ?