{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,1]],"date-time":"2026-04-01T20:22:31Z","timestamp":1775074951617,"version":"3.50.1"},"reference-count":38,"publisher":"IOP Publishing","issue":"46","license":[{"start":{"date-parts":[[2010,11,2]],"date-time":"2010-11-02T00:00:00Z","timestamp":1288656000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/iopscience.iop.org\/page\/copyright"},{"start":{"date-parts":[[2010,11,2]],"date-time":"2010-11-02T00:00:00Z","timestamp":1288656000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/iopscience.iop.org\/info\/page\/text-and-data-mining"}],"content-domain":{"domain":["iopscience.iop.org"],"crossmark-restriction":false},"short-container-title":["J. Phys. D: Appl. Phys."],"published-print":{"date-parts":[[2010,11,24]]},"abstract":"<jats:p>Diphenylalanine (FF) peptide nanotubes (PNTs) represent a unique class of self-assembled functional biomaterials owing to a wide range of useful properties including nanostructural variability, mechanical rigidity and chemical stability. In addition, strong piezoelectric activity has recently been observed paving the way to their use as nanoscale sensors and actuators. In this work, we fabricated both horizontal and vertical FF PNTs and examined their optical second harmonic generation and local piezoresponse as a function of temperature. The measurements show a gradual decrease in polarization with increasing temperature accompanied by an irreversible phase transition into another crystalline phase at about 140\u2013150\u2009\u00b0C. The results are corroborated by the molecular dynamic simulations predicting an order\u2013disorder phase transition into a centrosymmetric (possibly, orthorhombic) phase with antiparallel polarization orientation in neighbouring FF rings. Partial piezoresponse hysteresis indicates incomplete polarization switching due to the high coercive field in FF PNTs.<\/jats:p>","DOI":"10.1088\/0022-3727\/43\/46\/462001","type":"journal-article","created":{"date-parts":[[2010,11,3]],"date-time":"2010-11-03T04:55:15Z","timestamp":1288760115000},"page":"462001","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":94,"title":["Temperature-driven phase transformation in self-assembled diphenylalanine peptide nanotubes"],"prefix":"10.1088","volume":"43","author":[{"given":"A","family":"Heredia","sequence":"first","affiliation":[]},{"given":"I","family":"Bdikin","sequence":"additional","affiliation":[]},{"given":"S","family":"Kopyl","sequence":"additional","affiliation":[]},{"given":"E","family":"Mishina","sequence":"additional","affiliation":[]},{"given":"S","family":"Semin","sequence":"additional","affiliation":[]},{"given":"A","family":"Sigov","sequence":"additional","affiliation":[]},{"given":"K","family":"German","sequence":"additional","affiliation":[]},{"given":"V","family":"Bystrov","sequence":"additional","affiliation":[]},{"given":"J","family":"Gracio","sequence":"additional","affiliation":[]},{"given":"A L","family":"Kholkin","sequence":"additional","affiliation":[]}],"member":"266","published-online":{"date-parts":[[2010,11,2]]},"reference":[{"key":"jphysd359943bib01","doi-asserted-by":"publisher","year":"2008","DOI":"10.1007\/978-0-387-76540-2"},{"key":"jphysd359943bib02","first-page":"34","volume":"21","year":"2006","journal-title":"MRS Bull."},{"key":"jphysd359943bib03","doi-asserted-by":"publisher","first-page":"1385","DOI":"10.1111\/j.1551-2916.2008.02421.x","volume":"91","year":"2008","journal-title":"J. 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