Micromechanical properties of strain-sensitive lyriform organs of a wandering spider (Cupiennius salei).
Micromechanical properties of strain-sensitive lyriform organs of a wandering spider (Cupiennius salei).
复制标题
DOI：
10.1016/j.actbio.2016.06.009
复制
发表时间：
2016-09
影响因子：
9.7
通讯作者：
Seth L. Young;Marius Chyasnavichyus;F. Barth;I. Zlotnikov;Yael Politi;V. Tsukruk
中科院分区：
文献类型：
--
作者：
Seth L. Young;Marius Chyasnavichyus;F. Barth;I. Zlotnikov;Yael Politi;V. Tsukruk
位于漫游蜘蛛（cupiennius saleius）腿上的高度敏感的lyriform器官使蜘蛛能够检测到外骨骼中由运动或基底振动引起的纳米级应变。lyriform器官的形态特征导致它们对特定机械刺激的专门化和选择性敏感性，这使得它们对生物启发的应变传感器很感兴趣。本研究利用原子力显微镜（AFM）的力谱技术，对沙棘棘鱼两种lyriform器官——振动敏感跖lyriform器官（HS10）和本体感受性胫骨lyriform器官（HS8）的覆盖膜进行了纳米尺度的力学性能研究。力距曲线（fdc）显示出典型的多层结构特性，不同区域和压痕深度的弹性模量在150 ~ 500 MPa之间。此外，我们用大半径尖端探测了lyriform器官，这允许在不损坏表面的情况下，通过施加高强度和大规模变形来探测结构变形。在这种探测中观察到的传感器材料的粘弹性行为表明，机械松弛时间可能在lyriform器官的时间依赖性行为中起作用。位于漫游蜘蛛（cupiennius saleius）腿上的高度敏感的lyriform器官使蜘蛛能够检测到外骨骼中由运动或基质振动引起的纳米级应变。lyriform器官的形态特征导致它们对特定机械刺激的专门化和选择性敏感性，这使它们成为生物启发应变传感器的有趣之处。本研究利用原子力显微镜（AFM）的力谱技术，对沙棘棘鱼两种lyriform器官——振动敏感跖lyriform器官（HS10）和本体感受性胫骨lyriform器官（HS8）的覆盖膜进行了纳米尺度的力学性能研究。力距曲线（fdc）显示出典型的多层结构特性，不同区域和压痕深度的弹性模量在150 ~ 500 MPa之间。在这种探测中观察到的传感器材料的粘弹性行为表明，机械松弛时间在lyriform器官的时间依赖性行为中起作用。
Highly sensitive lyriform organs located on the legs of the wandering spiderCupiennius saleiallow the spider to detect nanometer-scale strains in the exoskeleton resulting from locomotion or substrate vibrations. Morphological features of the lyriform organs result in their specialization and selective sensitivity to specific mechanical stimuli, which make them interesting for bioinspired strain sensors. Here we utilize atomic force microscopy (AFM)-based force spectroscopy to probe nano-scale mechanical properties of the covering membrane of two lyriform organs found onCupiennius salei: the vibration sensitive metatarsal lyriform organ (HS10) and the proprioreceptive tibial lyriform organ (HS8). Force distance curves (FDCs) obtained from AFM measurements displayed characteristic multi-layer structure behavior, with calculated elastic moduli ranging from 150 MPa to 500 MPa for different regions and indentation depths. In addition, we probed the lyriform organs with a large radius tip, which allowed for probing structural deformation by the application of high forces and large scale deformations without damaging the surface. The viscoelastic behavior of the sensor materials observed in this probing suggests mechanical relaxation times potentially playing a role in the time-dependent behavior of the lyriform organs.Statement of SignificanceHighly sensitive lyriform organs located on the legs of the wandering spiderCupiennius saleiallow the spider to detect nanometer-scale strains in the exoskeleton resulting from locomotion or substrate vibrations. Morphological features of the lyriform organs result in their specialization and selective sensitivity to specific mechanical stimuli, which make them an interesting for bioinspired strain sensors. Here we utilize atomic force microscopy (AFM)-based force spectroscopy to probe nano-scale mechanical properties of the covering membrane of two lyriform organs found onCupiennius salei: the vibration sensitive metatarsal lyriform organ (HS10) and the proprioreceptive tibial lyriform organ (HS8). Force distance curves (FDCs) obtained from AFM measurements displayed characteristic multi-layer structure behavior, with calculated elastic moduli ranging from 150 MPa to 500 MPa for different regions and indentation depths. The viscoelastic behavior of the sensor materials observed in this probing suggests mechanical relaxation times playing a role in the time-dependent behavior of the lyriform organs.