Structure and Reactivity within Ultrathin Molecular Films
Abstract
A new technique based on the nonlinear optical phenomenon - second harmonic generation - has been developed for probing the structure of nano- to micrometer thickness thin films made of small and medium size organic molecules. It was found that the magnitude of the inter-molecular interaction plays a critical role in determining the growth mechanism, structure, crystallization kinetics, and phase transitions of the thin molecular films. The nonlinear optical technique can even allow the determination of the orientation and alignment of the molecules at the interface between the thin film and the substrate. Order of the molecules in the interfacial layer affects the crystallization mechanism in the thin film.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 27, 2004
- Accession Number
- ADA426761
Entities
People
- Hai-Lung Dai
Organizations
- University of Pennsylvania