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008 150608s2014 ua dh f m 000 0 eng d
040 _aEG-GiCUC
_beng
_cEG-GiCUC
041 0 _aeng
049 _aDeposite
097 _aM.Sc
099 _aCai01.24.05.M.Sc.2014.Ho.P
100 0 _aHossam Salah Rady Mohammed
245 1 0 _aPreparation of some metallic nanoparticles and their graphene nanocomposites in organic medium using different light sources /
_cHossam Salah Rady Mohammed ; Supervised Alsayed Abdelmajeid Elsherbini , Mona Bakr Mohamed
246 1 5 _aتحضير بعض الجسيمات الفلزية متناهية الصغر ومتراكباتها الجرافينية فى وسط عضوى باستخدام مصادر ضوئية مختلفة
260 _aCairo :
_bHossam Salah Rady Mohammed ,
_c2014
300 _a70 P. :
_bcharts , facsimiles ;
_c25cm
502 _aThesis (M.Sc.) - Cairo University - National Institute of Laser Enhanced Sciences - Department of Laser Applications in Environmental Metrology Photochemistry and Agriculture
520 _aA facile one-pot photochemical method has been developed to prepare different shapes of plasmonic nanomaterials and their graphene nanocomposites capped with a mixture of Oleyl Amine (O.Am) and Oleic Acid (O.Ac). Different light sources such as sunlight, UV (n = 254 nm) and halogen lamp have been used. The size, shape and morphology of the nanocrystals could be tailored by varying the light source and the exposure time. These factors strongly affect the particle shape, their self assembly into graphene surface and also the growth rate. Remarkable increase in the growth rate even at sunlight occurs upon introducing graphene oxide into the reaction mixture. The role of graphene as a catalyst and strong light absorber leads to increasing the growth rate and enhances the formation of rods, wires and more anisotropic shapes. By controlling the catalytic reduction of gold ions and the diffusion rate of gold seeds into graphene sheets, more complex structure such as snow flake gold nanostructure or self assembled regular shaped nanocrystals superlattice could be constructed on the graphene surface. The Photothermal response of these graphene based plasmonic nanomaterials has been monitored as a function of time
530 _aIssued also as CD
653 4 _aGraphene Composites
653 4 _aMetallic Nanoparticles
653 4 _aPhotochemical Synthesis
700 0 _aAlsayed Abdelmajeid Elsherbini ,
_eSupervisor
700 0 _aMona Bakr Mohamed ,
_eSupervisor
856 _uhttp://172.23.153.220/th.pdf
905 _aNazla
_eRevisor
905 _aSoheir
_eCataloger
942 _2ddc
_cTH
999 _c51242
_d51242