Surfactant adsorption at solid-liquid interfaces is important in many industrial processes, including corrosion inhibition, dispersion stabilization, and lubrication. Furthermore, surfactant adsorption may provide novel and exciting means to guide soft materials to self-assemble into a myriad of tailored shapes. Recently, PCCM researchers have made a breakthrough in elucidating the physical mechanisms behind surfactant self-assembly on a graphite surface [1].
To create a nationally replicable model of a sustainable and continuously up-gradable hands-on undergraduate teaching laboratory of scanning probe methods, GEMSEC is working with researchers from the UW's Center for Nanotechnology, educators from North Seattle Community College, representatives from a scanning probe microscopy manufacturer, and a nanotechnology SPM distributor. This partnership, NUE UNIQUE, will inaugurate a new paradigm of initiating, operating, and maintaining a SPM laboratory to serve entire classes of undergraduate students with a student to instrument ratio of ~3:1.
Functionally active thin film coatings find many important uses in the biomedical field as sensors and drug delivery systems. Members of IRG-II have created a new multilayer coating that can serve both functions. By creating a patterned multilayer stack comprised of alternating regions of low refractive index (nanoporous regions) and high refractive index (dense regions), the coating exhibits bright iridescent colors similar to those observed in, for example, hummingbird wings (see Figure below).
Members of of IRG-I have recently introduced a new concept in fiber lasers. Until now, emission from fiber lasers originated solely from the fiber ends in the axial direction with a spot size dictated by the core radius. In contrast, these novel lasers, termed surface-emitting fiber lasers (SEFLs), emit radiation radially and are capable of dynamic tuning of both the gain-medium position along the fiber axis and the direction of emission.These interesting results suggest that the direction of the laser beam can be controlled remotely just by rotating the pump polarization.
In 2004, PCCM launched a partnership with ASM to run a week-long "Materials Camp" for high school teachers. Over the past four years, over 120 teachers have been trained to teach materials science in local schools. In follow-up evaluations and refresher sessions, teachers report in using this knowledge in their classrooms.
Magnetic storage of digital data is now possible at densities approaching 1 Terabit per square inch at a cost of only about a tenth of a cent per Megabit. To a large extent, the breathtaking progress in this area of technology is sustained by discovery of bits. The invention of “GMR" sensors based on stacks of ultra-thin films of magnetic metals (for which the Nobel Prize in Physics was awarded in 2007) is a perfect example.
The Princeton Center for Complex Materials has run a highly successful Research Experience for Undergraduates (REU) program for over a decade. The 33 participants in 2007's program were selected from a strong pool of 310 applicants, and through our Partnership for Research and Education in Materials (PREM) with California State University - Northridge (CSUN), we were able to include five CSUN undergraduates in this group. Through our REU program, students become familiar with Princeton as well as research; five former REU students are currently enrolled here as Ph.D.