title: Surface Enhanced Raman Spectroscopic investigations of 2-bromo-3-methylamino-1,4-naphthoquinone on silver nanoparticles.
abstract: Surface Enhanced Raman Spectroscopic technique has been employed to investigate the orientation of 2-bromo-3-methylamino-1,4-naphthoquinone (BMANQ) on silver nanoparticles. Silver nanoparticles have been prepared by solution combustion method with citric acid as fuel. Silver nanoparticles were characterized by X-ray Diffraction (XRD), High Resolution Transmission Electron Microscopy (HRTEM) and Scanning Electron Microscopy (SEM). XRD and morphological results confirmed the nanocrystalline nature of the prepared silver nanoparticles. The observed intense CO stretching, CBr stretching and NH2 vibration suggests that the BMANQ molecule may be adsorbed in a 'stand-on' orientation to the silver surface. The calculated highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy show that charge transfer occurs within the molecule.
authors.affiliation: Department of Physics, Mother Teresa Women's University, Kodaikanal 624101, India.
authors.forename: K
authors.initials: K
authors.lastname: Geetha
authors.affiliation: Department of Physics, Mother Teresa Women's University, Kodaikanal 624101, India. Electronic address: ums10@yahoo.com.
authors.forename: M
authors.initials: M
authors.lastname: Umadevi
authors.affiliation: UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore 452017, India.
authors.forename: G V
authors.initials: GV
authors.lastname: Sathe
authors.affiliation: Laboratoire de Pharmaco-Chimie Radicalaire, Faculté de Pharmacie, Aix-Marseille Univ, CNRS, Institut de Chimie Radicalaire ICR, UMR 7273, 27 Boulevard Jean Moulin, 13385 Marseille Cedex 05, France.
authors.forename: P
authors.initials: P
authors.lastname: Vanelle
authors.affiliation: Laboratoire de Pharmaco-Chimie Radicalaire, Faculté de Pharmacie, Aix-Marseille Univ, CNRS, Institut de Chimie Radicalaire ICR, UMR 7273, 27 Boulevard Jean Moulin, 13385 Marseille Cedex 05, France.
authors.forename: T
authors.initials: T
authors.lastname: Terme
authors.affiliation: Laboratoire de Pharmaco-Chimie Radicalaire, Faculté de Pharmacie, Aix-Marseille Univ, CNRS, Institut de Chimie Radicalaire ICR, UMR 7273, 27 Boulevard Jean Moulin, 13385 Marseille Cedex 05, France.
authors.forename: O
authors.initials: O
authors.lastname: Khoumeri
keywords: 2-Bromo-3-methylamino-1,4-naphthoquinone (BMANQ); Silver nanoparticles; Solution combustion method; Surface Enhanced Raman scattering