title: A Sinusoidally Architected Helicoidal Biocomposite.
abstract: A fibrous herringbone-modified helicoidal architecture is identified within the exocuticle of an impact-resistant crustacean appendage. This previously unreported composite microstructure, which features highly textured apatite mineral templated by an alpha-chitin matrix, provides enhanced stress redistribution and energy absorption over the traditional helicoidal design under compressive loading. Nanoscale toughening mechanisms are also identified using high-load nanoindentation and in situ transmission electron microscopy picoindentation.
authors.affiliation: Materials Science and Engineering Program, University of California, Riverside, CA, 92521, USA.
authors.forename: Nicholas A
authors.initials: NA
authors.lastname: Yaraghi
authors.affiliation: Lyles School of Civil Engineering, Purdue University, West Lafayette, IN, 47907, USA.
authors.forename: Nicolás
authors.initials: N
authors.lastname: Guarín-Zapata
authors.affiliation: Department of Chemical and Environmental Engineering, University of California, Riverside, CA, 92521, USA.
authors.forename: Lessa K
authors.initials: LK
authors.lastname: Grunenfelder
authors.affiliation: Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN, 55455, USA.
authors.forename: Eric
authors.initials: E
authors.lastname: Hintsala
authors.affiliation: Hysitron Inc, Minneapolis, MN, 55344, USA.
authors.forename: Sanjit
authors.initials: S
authors.lastname: Bhowmick
authors.affiliation: TESCAN USA Inc, Pleasanton, CA, 94588, USA.
authors.forename: Jon M
authors.initials: JM
authors.lastname: Hiller
authors.affiliation: TESCAN USA Inc, Pleasanton, CA, 94588, USA.
authors.forename: Mark
authors.initials: M
authors.lastname: Betts
authors.affiliation: TESCAN USA Inc, Pleasanton, CA, 94588, USA.
authors.forename: Edward L
authors.initials: EL
authors.lastname: Principe
authors.affiliation: Materials Science and Engineering Program, University of California, San Diego, La Jolla, CA, 92093, USA.
authors.forename: Jae-Young
authors.initials: JY
authors.lastname: Jung
authors.affiliation: Advanced Materials Characterization Facility, Office of the Deputy Vice-Chancellor (R&D) Western Sydney University, Penrith, NSW, 2751, Australia.
authors.forename: Leigh
authors.initials: L
authors.lastname: Sheppard
authors.affiliation: Advanced Materials Characterization Facility, Office of the Deputy Vice-Chancellor (R&D) Western Sydney University, Penrith, NSW, 2751, Australia.
authors.forename: Richard
authors.initials: R
authors.lastname: Wuhrer
authors.affiliation: Materials Science and Engineering Program, University of California, San Diego, La Jolla, CA, 92093, USA.
authors.forename: Joanna
authors.initials: J
authors.lastname: McKittrick
authors.affiliation: Lyles School of Civil Engineering, Purdue University, West Lafayette, IN, 47907, USA.
authors.forename: Pablo D
authors.initials: PD
authors.lastname: Zavattieri
authors.affiliation: Materials Science and Engineering Program, University of California, Riverside, CA, 92521, USA.|Department of Chemical and Environmental Engineering, University of California, Riverside, CA, 92521, USA.
authors.forename: David
authors.initials: D
authors.lastname: Kisailus
keywords: biomineral; composites; impact; toughness; ultrastructure