title: Morphology and nanoindentation properties of mouthparts in Cyrtotrachelus longimanus (Coleoptera: curculionidae).
abstract: Microstructure and nanoindentation properties of the mouthparts for the skillful driller Cyrtotrachelus longimanus are presented. The composition and morphological examinations are made using light, fluorescent, scanning electron microscopy, and Energy Disperse Spectroscopy, respectively. Nanoindentation was carried out to measure the elastic modulus and the hardness of mouthparts. The hardness and modulus for "dry" samples is 0.202 ± 0.065 and 8.604 ± 0.838 GPa, respectively, and the values of "fresh" ones is 0.126 ± 0.0196 and 6.951 ± 0.065 GPa, respectively. These results are critical for analyze the drilling mechanism of the weevil and provide a biological template to inspire the biomimetic design.
authors.affiliation: College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, 29 Yudaojie Street, Nanjing, 210016, China.|Institute of Bio-inspired Structure and Surface Engineering, Nanjing University of Aeronautics and Astronautics, 29 Yudaojie Street, Nanjing, 210016, China.
authors.forename: Longhai
authors.identifier: http://orcid.org/0000-0002-8522-9511
authors.initials: L
authors.lastname: Li
authors.affiliation: Institute of Bio-inspired Structure and Surface Engineering, Nanjing University of Aeronautics and Astronautics, 29 Yudaojie Street, Nanjing, 210016, China.
authors.forename: Ce
authors.initials: C
authors.lastname: Guo
authors.affiliation: Key Laboratory of Bionic Engineering (Ministry of Education, China), The College of Biological and Agricultural Engineering, Jilin University at Nanling Campus, 5988 Renmin Street, Changchun, 130025, China.
authors.forename: Shun
authors.initials: S
authors.lastname: Xu
authors.affiliation: Institute of Bio-inspired Structure and Surface Engineering, Nanjing University of Aeronautics and Astronautics, 29 Yudaojie Street, Nanjing, 210016, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Li
authors.affiliation: Institute of Bio-inspired Structure and Surface Engineering, Nanjing University of Aeronautics and Astronautics, 29 Yudaojie Street, Nanjing, 210016, China.
authors.forename: Cheng
authors.initials: C
authors.lastname: Han
mesh_terms: D000818:Animals; D004548:Elasticity; D006244:Hardness; D008853:Microscopy; D008855:Microscopy, Electron, Scanning; D009055:Mouth / Q000033:anatomy & histology* / Q000648:ultrastructure*; D013052:Spectrometry, X-Ray Emission; D048889:Weevils / Q000033:anatomy & histology* / Q000648:ultrastructure*
keywords: biomimetic; microstructure; mouthparts; nanoindentation properties