1Department of Chemistry and Biochemistry 9510, University of California, Santa Barbara, CA 93106, USA
2Program in Chemical Engineering, University of California, Santa Barbara, CA 93106, USA
3Department of Chemistry and Biochemistry, University of California, San Diego, CA 92093, USA
4Program in Biomolecular Sciences and Engineering, University of California, Santa Barbara, CA 93106, USA
*To whom correspondence should be addressed. Tel: +1 805 893 8364; Fax: +1 805 893 4120; Email: chen@chem.ucsb.edu. Correspondence may also be addressed to Ulrich F. Müller. Tel: +1 858 534 6823; Fax: +1 858 534 6255; Email: ufmuller@ucsd.edu
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