COLL 290 |
| Rachel K. Smith1, Christina E. Inman2, James E. Hutchison2, and Paul S. Weiss1. (1) Departments of Chemistry and Physics, The Pennsylvania State University, 152 Davey Laboratory, University Park, PA 16802-6300, (2) Department of Chemistry and Materials Science Institute, University of Oregon, 1253 University of Oregon, Eugene, OR 97403-1253 |
| Soft lithography techniques such as microcontact printing have led to the ability to place molecules positively upon surfaces with great precision. However, both the elastomeric materials used in the "stamping" process and the chemical nature of the molecular "inks" can lead to compromised edge resolution and the blurring of boundaries between printed and backfilled molecules. We use scanning tunneling microscopy and lateral force microscopy to examine the order of these assemblies as well as the sharpness between domains of molecules on both the small and large scales. We print molecules with strong self-interactions to minimize their diffusion across the surface, and we use a stamp composed of multiple elastomers to minimize spreading of the stamp upon contact with the surface during the printing process while still maintaining conformal contact. We examine and quantify the exchange between printed and backfilled molecules. |
|
Nanoscience and Nanotechnology
6:00 PM-8:00 PM, Monday, March 29, 2004 Disneyland -- North Exhibit Hall, Poster
Division of Colloid and Surface Chemistry |