Dependence on molecular weight of porogen

For the porous MSQ film templated by the F88 triblock copolymer porogen, which has the largest molecular mass in the samples studied, die positronium diffusion length was found to be the shortest and the pore size the smallest. 

The Author thanks Professor Allen P. Mills, Jr., of the University of California at Riverside Drs. R. Suzuki and T. Ohdaira of the National Institute of Advanced Industrial Science and Technology, Japan Dr. Shu Yang of Bell Labs Dr. J. Maxam of Oak Ridge National Laboratories and Professor D. Gidley of the University of Michigan for their contribution and helpful discussions. This research was sponsored by the Division of Chemical Sciences, Geosciences, and Biosciences, BES, U.S. DOE, under 

Contract DE-AC05-00OR22725 with ORNL, managed and operated by UT—Batelle, LLC. 

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