title: Shape-directing role of cetyltrimethylammonium bromide in the green synthesis of Ag-nanoparticles using Neem (Azadirachta indica) leaf extract.
abstract: The shape-directing role of cetyltrimethylammonium bromide, CTAB, is reported to the green synthesis of Ag-nanoparticles for the first time using Neem (Azadirachta indica) leaf extract. UV-vis spectroscopy, transmission electron microscopy (TEM), and selected area electron diffraction (SAED) patterns were used to monitor the growth kinetics, morphology and crystalline nature of Ag-nanoparticles, respectively. It was observed that the growths of Ag-nanoparticles are stopped within 40 min of reaction time. The Ag-nanoparticles are polydispersed spherical and exhibiting an interesting triangle, flat, plate-like hexagonal and some irregular morphology in presence of different [CTAB]. Hexagonal particles aggregated in a systematic manor, leads to produce a fine tiles-like arrangement of Ag-nanoparticles with dimensions between 10 and 37 nm. The nature of reaction-time curves to the reduction of Ag(+) ions by Neem leaf extract are much different than those observed by us in our earlier studies using different bio-reductants.
authors.affiliation: Nano-Science Research Lab, Department of Chemistry, Jamia Millia Islamia (Central University), New Delhi 110025, India. drkhanchem@yahoo.co.in
authors.forename: Zaheer
authors.initials: Z
authors.lastname: Khan
authors.forename: Javed Ijaz
authors.initials: JI
authors.lastname: Hussain
authors.forename: Athar Adil
authors.initials: AA
authors.lastname: Hashmi
mesh_terms: D031601:Azadirachta / Q000737:chemistry*; D000077286:Cetrimonium; D002593:Cetrimonium Compounds / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D010936:Plant Extracts / Q000737:chemistry* / Q000302:isolation & purification; D018515:Plant Leaves / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*
chemical_list: D002593:Cetrimonium Compounds; D010936:Plant Extracts; D012834:Silver; D000077286:Cetrimonium