Recent Publications

Sensitized excited free-radical processes as read–write tools: impact on non-linear lithographic processes

Stefania Impellizzeri, K. G. Stamplecoskie and J.C. Scaiano, “Sensitized excited free-radical processes as read–write tools: impact on non-linear lithographic processes”, Phys. Chem. Chem. Phys. (PCCP),15 (36), 14873-14878 (2013)

StefaniaPhysChemTOC
A prefluorescent radical probe in which a 2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPO) unit is sensitized
with visible light via energy transfer from a tethered coumarin dye has been synthesized. The excited
TEMPO moiety undergoes hydrogen abstraction from a polymer with concomitant functionalization of
the polymeric matrix; this writing process can be reversed thermally. The fluorescent probes can be
bleached under high intensity illumination, making these new materials suitable for dual-tone
lithography with potential applications in sub-diffraction lithographic imaging.