This invention embodies a method that can be used to increase the porosity of the gel substrate during the fabrication of microchips. This increase in gel porosity will allow larger molecules such as non-fragmented RNAs and DNA fragments greater then 100 base pairs in length, and proteins to be immobilized and introduced within the gel microchips.
CONTRACTUAL ORIGIN OF INVENTION
 The United States Government has rights in this invention pursuant to Contract No. W-31-109-ENG-38 between the U.S. Department of Energy and the University of Chicago, representing Argonne National Laboratory.