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dc.contributor.authorAhmad Nazrul, Rosli,-
dc.description.abstractWe make clusters of atoms of the size of less than 1 nanometer by using the density functional theory and from that we obtain the bond lengths corresponding to the minimum energy configuration. We are able to optimize large clusters of atoms and find the vibrational frequencies for each cluster. This calculation provides us with a method to identify the clusters present in an unknown sample of a glass by comparing the experimental Raman frequency with the calculated value. We start with the experimental values of the Raman frequencies of PSe (Phosphorous-Selenium) glass. We calculate the structural parameters of PSe, P4Se, P2Se2, P4Se5, PSe4, P4Se3 clusters of atoms and tabulate the vibrational frequencies. We compare the calculated values with those measured. In this way we find the clusters of atoms present in the glass. Some times, the same number of atoms can be rearranged in a different symmetry. Hence we learn the symmetries of molecules. We find that certain symmetries are broken due to self-organization in the glassy state.en_US
dc.publisherTrans Tech Publications Ltden_US
dc.subjectDensity-functional theoryen_US
dc.subjectRaman spectraen_US
dc.subjectvibrational frequencyen_US
dc.titleThe Raman Spectra of Nanocomposite Clusters of Atoms in Phosphorous-Selenium Glassy Stateen_US
dc.typeConference Paperen_US
Appears in Collections:Nanosynthesis And Nanodevice

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