XRD peak of bare carbon dots coming at 19 degrees and surface functionalised carbon dots with hexadecylamine coming at 19 degrees and 20-22 degrees, can someone help me in analysing these peaks and finding crystal structure formed in these two dots.
In crystalline material, appearance of such sharp side peaks in the diffraction pattern is associated with a periodic variation of lattice spacings [1] (see in particular Sec. 7.2.1, p. 216, herein). It seems likely that a similar process is at work here, namely that surface functionalisation gives rise to some form of periodic self-organisation.
[1] A Guinier, X-Ray Diffraction (WH Freeman, London, 1963).
Dear Manasa,
I agree with Dr. Behnam.
Carbon compounds are hard to order them selfs in soft conditions; in general case, they will be unorganized.
Once you got your material functionalized, by the simple principle to prevent unstable steric conformations, there should happen some natural organization.
In X-ray diffraction such organization will result in space extended range arrangement, resulting in some organization that generates the appearance of Bragg predicted reflections due to the presence of symmetry relationships at long range in space.
That is what you saw in your experiment.
WNM
Edward Andrew Payzant Sample is drop casted on glass substrate and powder XRD is taken.
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