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QQ2.08 - Characterization of Green Synthesized Copper Nanoparticles Stabilized by Ocimum Leaf Extract 
April 22, 2014   4:30pm - 4:45pm

Among many metals, copper and copper based compounds are the attractive materials due to their catalytic, optical, and electrical properties. Copper nanoparticles were synthesized successfully through chemical reduction of different copper salts stabilized by Ocimum Leaf Extract, a natural biopolymer. The resulting copper nanoparticles were characterized by UV Visible Absorption Spectrometer, X-Ray Diffraction (XRD), Fourier Transform Infrared (FTIR), Scanning Electron Microscopy (SEM) and Transmission Electron Microscopy (TEM) experiments. X-ray diffraction pattern exhibits the presence of pure Cu powder. The lattice parameter ‘a’ has been calculated by using this profile is 3.61505 Ã…. The average size of copper nanoparticles is around 20 nm. The FTIR spectrum analysis has confirmed the presence of functional groups of stabilizer Ocimum leaf extract in capping the copper nanoparticles. The broad and strong bands are observed at around 3480 cm-1, 1627 cm-1 and 622 cm-1 corresponding to the O-H stretching frequency. The broad band observed at around 3480 cm-1 and 622 cm-1 illustrates the stretching frequency of hydroxyl group (OH group) present in the surface of the copper nanoparticle. It characterizes stretching vibrations of O-H bonds in H2O molecules absorbed on the nanoparticle surface. But it could be related also with the copper hydroxide presence. The band observed at around 1627 cm-1, which is characteristic for bending vibrations of O-H bonds in OH groups.Copper nanoparticles prepared displayed an absorption peak at around 558 nm. Copper nanoparticles have been used to prepare substrates for Surface Enhanced Raman Scattering measurements. These results show that the surface enhancement of copper nanoparticles is good. Novelty of this present study is that the plant extract (Ocimum leaf extract) is very cost effective and eco-friendly. Therefore, this can be economic and effective alternative for the large scale synthesis of copper nanoparticles.

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Keynote Address
Panel Discussion - Different Approaches to Commercializing Materials Research
Business Challenges to Starting a Materials-Based Company
Fred Kavli Distinguished Lectureship in Nanoscience
Application of In-situ X-ray Absorption, Emission and Powder Diffraction Studies in Nanomaterials Research - From the Design of an In-situ Experiment to Data Analysis