Laser Desorption from Metal Oxides (Kay's BES-Surface Kinetics, PNNL Scope #16248)
EMSL Project ID
21794
Abstract
Laser ablation and desorption techniques form the basis of unique methods for producing novel materials, performing sophisticated chemical analysis or medical procedures. Although laser ablation/desorption techniques are utilized extensively across a diverse range of disciplines, detailed mechanistic understanding has proved elusive due to the inherent complexity of the initial laser solid interaction and subsequent particle emission processes. The primary laser absorption may occur through linear or nonlinear mechanisms and through intrinsic or extrinsic photo-centers; further complications are introduced by the many-bodied dynamics that ultimately lead to particle emission. Many of the key processes (i.e. electron-hole recombination, trapping, exciton relaxation, electron/phonon interactions, etc.) occur on a sub-nanosecond time-scale and femtosecond laser studies are needed to clarify the role of ultrafast phenomena involved in laser desorption processes. To obtain detailed understanding of highly complex laser desorption processes, a collaborative experimental and theoretical effort is proposed.
Project Details
Project type
Exploratory Research
Start Date
2006-09-22
End Date
2007-09-24
Status
Closed
Released Data Link
Team
Principal Investigator
Team Members