Lara Halaoui Ph.D.

Halaoui, Lara
Position Department / Business Unit
Associate Professor Physical Chemistry
Institution Disciplines
American University in Beirut Nanoparticles Quantum Dots
City State / Provence
Country Website
Beirut link
Fax

Dr. Halaoui's main research efforts are focused on the synthesis, self-assembly, and exploration of the photoelectrochemical, optical, and electrical properties of nanoparticles and ensembles of nanoparticles by means of spectroscopic, photoelectrochemical, and scanning probe microscopy techniques.

For example, we synthesize semiconductor (e.g., CdS) and metal (e.g., Pt) nanocrystallites using anionic polyelectrolytes as surface capping agents, and assemble them in multilayers at surfaces previously modified with cationic polyelectrolyte polymers, and study the factors affecting film growth.

We also explore the processes of light-induced charge separation, hopping at interfaces, recombination, and transfer to solution species or to electrode surfaces in semiconductor nanoparticles and ensembles of nanoparticles using photoelectrochemical techniques. Our group is also involved in the elucidation of mechanistic redox chemistry of novel organic molecules using electrochemical techniques.

Education

Postdoctoral Fellow, University of Texas at Austin, Advisor: Allen J. Bard (1998) Ph.D. Duke University, Advisor: Louis A. Coury, Jr. (1993-1997) B.S. with Distinction, American University of Beirut (1992)

Important Articles

• Electroluminescence at GaN and Gax In1-xN Electrodes in Aqueous Electrolytes, Electrochem. Solid-State let.1998, 1, 142 (with C. Hung, A. J. Bard, P. A. Grudowski, R. D. Dupuis, J. Molstad and F. J. Disalvo).
• STM and TS Study of InAs Quantum Dots Immobilized on Au and Pt Surfaces,. Chem. Mater. 2000, 12, 1205 (with R. L. Wells and L. A. Coury. Jr.).
• Reduction of Nitric Acid to Hydroxylamine at Glassy Carbon Surfaces Modified by the Reduction of p-Phenylenediamine and p-Aminophenol in 1.0 M Nitric Acid- A Scanning Electrochemical Microscopy Study, J. Electrochem. Soc. 2001, 148, E386 (with H. Sherifian and A. J. Bard).
• Layer-by-Layer Assembly of Polyacrylate-Capped CdS Nanoparticles in Poly(diallyldimethylammonium chloride) on Solid Surfaces, Langmuir 2001, 17, 6747.

By this Researcher

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