**Acknowledgements**

produced from the 15% w/v PLA solution to that of the GorTex for one of our devices. The decision to use the 15% w/v PLA membrane was done under the bases that this membrane

The device utilized to test the suitability of the PLLA based composite membrane was a pseudo-capacitor device, using as electrode material the oxidized and neutralized species of poly-3,4-propylenedioxythiophene (the process for the construction of this device have been previously reported by our group) [22,23]. The results indicated (figure 10) that over slow charging-discharging rates our membrane performed better than the bench mark membrane, but as we moved from moderate to fast charge-discharge rates, the performance of both

**Figure 10.** Specific capacitance as a function of scan rate and voltage window for poly-3,4-propylenedioxythiophene

pseudo-capacitor using GorTexTM and PLLA separator membranes.

posses more uniformity in the average pores' size than the others.

**10. Concluding remarks**

160 Advances in Nanofibers

membranes are comparable.

We would like to acknowledge support from the following sources:

The Penn's Nano-Bio Interface Center (NBIC) through the NSF sponsored grant NSEC DM R08-32802.

R. Cardona would like to acknowledge the University of Pennsylvania Provost Office and the Laboratory for the Research on the Structure of Matter (LRSM) through the NSF grant DMR11-20901 for her support as a postdoctoral fellow.

We like to acknowledge the SEM microscopy work of our collaborator Prof. Eva Campo from Penn' s LRSM.

We acknowledge the help offered by our graduate students Mr. Timothy Jones, and Hitesh Sahoo, as well as the NSF – REU sponsored undergraduates Mr. Matt Biggers, Mr. Esteban Villareal, Mr. Raymond Xu, Mr. Melvin Berrios and the two H.S. interns, Mr. Adam Flecher and the ACS-Seed fellow, Ms. Rebecca Irizarry.
