Free‑Standing Ferroelectric Nanotubes Processed via Soft‑Template Infiltration Bernal, Ashley ; Tselev, Alexander ; Kalinin, Sergei ; Bassiri-Gharb, Nazanin Abstract Publication: Advanced Materials Pub Date: March 2012 DOI: 10.1002/adma.201103993 Bibcode: 2012AdM....24.1160B