If we talk about the XRD analysis of GQD's then what result we conclude about the crystal nature of GQD's from XRD..either GQD's are cubic, orthorhombic etc ????
Quantum dots have a molecular structure formation and doesn't diffract XRD since it doesn't have lattice periodicity
the following power point may help to understand that
"Solid Surface and Nanoscale materials Structure"
Presentation · July 2016 with 142 Reads
DOI: 10.13140/RG.2.2.31947.59684
Charmo, University of Charmo, University of Salahaddin, DOI:10.13140/RG.2.2.31947.59684
Cite this publication
Omar M S at Salahaddin University - Hawler, Arbil, Kurdistan, Iraq
Omar M S
39.05Salahaddin University - Hawler, Arbil, Kurdistan, Iraq
Hi Nouman, I suggest reading one of the review articles about graphene quantum dots, for instance this one: Graphene quantum dots and their possible energy applications: A review (10.1016/j.cap.2016.03.026 ).
But directly related to your question: term GQD is generally related to nanosized (< 30nm) single to up-to 10 layers of graphene (well, I googled that, so it's not my definition), therefore the size of the crystallites will already be a big problem for XRD (broad peak etc.). And since graphene differ from graphite by "lack of bonding" in 100, you will also not get those reflections in XRD (otherwise we're talking about graphite). For more in-depth reading about the problem of the graphene structure I would recomend this chapter: Structure and Properties of Graphene (10.1016/B978-0-12-812651-6.00001-X), but generally graphene (and GQDs) are not cubic, orthorhombic, etc., but layered 2D structures of carbon atoms arranged in a hexahonal lattice.
(Yes, it can also be considered as an indefinitely large molecule).
Thank you so much sir Omar M S and Janez Zavašnik for your replies.
Sir Omar M S your presentation is not opened from me..i dont know why
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