PRODUCTION AND APPLICATIONS OF GRAPHENE AND ITS COMPOSITES

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PRODUCTION AND APPLICATIONS OF GRAPHENE AND ITS COMPOSITES ( production-and-applications-graphene-and-its-composites )

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Chapter 5 – Production of Few Layer Graphene in Organic Solvents number particle size distribution (NPSD). The presence of such uncharacteristic peaks (> 3 ΞΌm) will have an effect on the value of 𝑧-Average diameter as it considers all the peaks in the IPSD. Such peaks would affect the VPSD and NPSD as the software uses Mie theory to convert the peaks of IPSD. Hence, IPSD is the only value which could be considered, as only the solvent temperature and viscosity values are required to derive the size information.70 5.2.4.2. Correlation of lateral sizes determined by AFM, Raman and DLS In this section, the length data derived from the primary peak position of the DLS IPSD (𝐿𝐷𝐿𝑆) is compared with 𝐿𝐴𝐹𝑀 and πΏπ‘…π‘Žπ‘šπ‘Žπ‘› to see its relevance with the data. Figure 5.18: Plot between the primary peak position derived from DLS data (𝐿𝐷𝐿𝑆) vs 𝐿𝐴𝐹𝑀 and πΏπ‘…π‘Žπ‘šπ‘Žπ‘› showing its linear dependence. Error data are from the standard deviations. Figure 5.18 show the dependence between 𝐿𝐷𝐿𝑆, 𝐿𝐴𝐹𝑀 and πΏπ‘…π‘Žπ‘šπ‘Žπ‘›. It has to be noted that all data from FLG/NMP and FLG/DMF has been used in this plot. It is clear that the 𝐿𝐷𝐿𝑆 data correlates and scale linearly with both 𝐿𝐴𝐹𝑀 and πΏπ‘…π‘Žπ‘šπ‘Žπ‘›, suggesting that the data obtained by DLS is indeed the size data of graphene sheets. This in turn confirms 156

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