Surface and Interface Studies of Photochemically Initiated Immobilization
EMSL Project ID
20493
Abstract
The ability to precisely control surface and interface properties is of paramount importance in applications ranging from catalysis, adhesion, sensing, to nanoscale devices. Critical to these applications are surface modification methods that are simple, reproducible and versatile. Photochemically initiated immobilization has gained increasing popularity due to its versatility and simplicity. However, the fundamental immobilization chemistry has been poorly studied. Examples in the literature have more or less adapted a similar procedure regardless of the type of systems employed. Various results were reported and there are no systematic studies on how the immobilization yield and efficiency could be affected and controlled. The objective of this proposed research is to apply surface and interface engineering principles to control the immobilization process with regard to molecular level structures at surfaces and interfaces, as well as the molecular properties of immobilized materials. The goal is to gain understanding of atomic and molecular level structure-function relationships at the surface and interface, and to develop strategies and guidelines for tailor-made surfaces and interfaces to achieve desired immobilization efficiencies for a greater variety of molecules and materials. Two systems will be investigated, i.e., solid-solid and solid-liquid interfaces. Important surface characterization tools such as XPS and SIMS will be used to assess chemical composition of created surfaces and interfaces. We have established productive working relationship with EMSL personnel. Two important publications are the direct results of the EMSL user facilities (Nano Lett. 2002; JACS 2006). We look forward to continuing our fruitful collaboration.
Project Details
Project type
Large-Scale EMSL Research
Start Date
2007-05-31
End Date
2009-09-30
Status
Closed
Released Data Link
Team
Principal Investigator
Team Members
Related Publications
Chada, S, and M Yan. 2008. "Self-Assembled Nanostructures from Homopolymer Induced by Uv and Solvent Exposure." Soft Matter 4(11):2164-2167 doi: 10.1039/b807328g (Portland State U - INS 20493).
Uppalapati S, S Chada, MH Engelhard, and M Yan. 2010. "Photochemical Reactions of Poly(4-vinylphenol) Thin Films." Macromolecular Chemistry and Physics 211(4):461-470. doi:10.1002/macp.200900484