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  1. 1. 100 nm
  2. 2. Fluorescent and magnetic monodisperse Fe3O4 nanoparticles covered by a biocompatible fluorescent silica shell Magnetism of the nanoparticles Photograph showing the high stability in water of the nanoprobes TEM image of the Fe3O4 monodispersed nanoparticles TEM images of the Fe3O4 nanoprobes 50 nm 25 nm ___ 25 nm ___ 20 nm ___ 100 nm ___ 100 nm 100 nm
  3. 3. Enzyme Immobilization on Magnetic Nanoparticles Applications  Synthesis of enantioenriched monomers and macromers  Polymerization reaction  Biodiesel production Example: Immobilization of lipolytic enzyme (E.C on Fe3O4 nanoparticles Advantages  Easiness of recovery and reuse  High enzyme loading capability due to their large specific surface area  Lower diffusion limitation in solutions TEM image of Fe3O4 nanoparticles
  4. 4. Bi-layer graphene Graphene CCVD synthesis on Ni substrate
  5. 5. 110 200 211 Mean diameter 4.12 nmMean diameter 4.12 nm Standard deviation 0.86 nmStandard deviation 0.86 nm 2 graphene layers Core-Shell graphene Fe/Co nanoparticles by CCVD
  6. 6. Graphene /SiC 0.35 a CBA 0.35 nm C/SiO2/SiC
  7. 7. N=100 Graphene flakes by physical exfoliation of graphite in NMP
  8. 8. TEM images of FE3O4 nanoparticles on graphene nanosheets obtained by physical exfoliation of graphite, at increasing magnification Synthesis and characterization of FLG/Fe3O4 nanohybrid supercapacitor 100 1000 10000 100000 0 20 40 60 80 Energy density (Wh/kg) Powerdensity(W/kg) 0 30 60 90 120 150 180 0 200 400 600 800 1000 Cycle Number Capacitanceretention(F/g) 20 A/g 0 0,5 1 0 50 100 150 200 250 Time (sec) Potential(V) Galvanostatic charge/discharge curves of the nanohybrid (a, b, c). Cyclic voltammetry of the nanohybrid (d). Capacitance retention at 20 A/g (e). Ragone Plot ( f). d e f a b c
  9. 9. Tribological resultsTribological results WS2@oleylamineMoS2@oleylamine SynthesisSynthesis Rheological resultsRheological results Nanoparticles and characterization Raman Analysis Surface 3D-profile analysis SEM images of thin-film GO chemically synthesized in high yield. SEM images of thin-film GO chemically synthesized in high yield. TEM/SEM (c) Oil+0.05 wt.% of graphene Pure oil
  10. 10. Enhancing Lubricating Greases with Nano-sized Inorganic based Additives
  11. 11. Dehalogenation and Contemporaneous Removal of Halocarbon using Ni/Graphene Nanoparticles (Ni/FLG) Raman Spectrum of Ni-FLG G 2D DNiO TEM images of Ni/FLG: lots of particles, 400-500 nm in size and uniformly dispersed on FLG, are visible Diameter of 40-50 nm solvent peaks (hexane) GC-MS spectra after 15 min GC-MS spectra Chlordane The chlordane was completely removed in 15 min.
  12. 12. WS2@oleylamine a b c d e f rGO Magnetite/Graphene Oxide (Fe3O4/GO) as a novel nanoplatform for electrochemical detection of Arsenic (III) TEM images of as prepared of Fe3O4/rGO Electrochemical detection of Fe3O4/rGO: Comparison of cyclic voltammograms (CV) of GO, Fe3O4 and Fe3O4/rGO in PBS (a). CV of Fe3O4/rGO at increasing As (III) concentration (b). Square wave anodic stripping voltammetry (SWASV) of Fe3O4/rGO (c). Relation between arsenite concentration with peak current from CV as in (b); (d, e). Relation between arsenite concentration with peak current from SWASV as in (c); (f). As(III) was detected with a sensitivity of 2.6 μA ppb-1 and a theoretical limit of detection (LOD) of 0.38 ppb.
  13. 13. Tomato waste for biodiesel production CH2—OCOR1 | CH—OCOR2 | CH2—OCOR3 3CH3OH CH2OH | CHOH | CH2OH R1COOCH3 R2COOCH3 R3COOCH3 Tomato seed Oil Methanol Glycerol Methyl-ester Fe3O4/Au@CA_L GC Spectra Biodiesel producted Functionalization and immobilization Lipase Production Biodiesel using immobilizated lipase Study of ratio molar oil/methanol and cycle number on conversion biodiesel