Nonlinear control of high-frequency phonons in spider silk

Schneider, Dietrich; Gomopoulos, Nikolaos; Koh, Cheong Yang; Papadopoulos, Periklis; Kremer, Friedrich; Thomas, Edwin L.; Fytas, George

doi:10.1038/nmat4697

Cited by 54 publications

(30 citation statements)

References 33 publications

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“…More recently, BLS investigation of spider dragonlike silk has revealed the presence of a hypersonic phononic bandgap and of a negatively dispersive region. These features have been attributed to the interplay between the uniaxial symmetry of the nanofibrils and non-local nonlinear mechanical behavior of the surrounding inhomogeneous amorphous polymer matrix [45].…”

Section: Brillouin Spectroscopy From Biomaterialsmentioning

confidence: 99%

Brillouin scattering of phonons in complex materials

Bottani

Fioretto

2018

Advances in Physics: X

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Initially, the theory of propagation of long-wavelength acoustic phonons and Brillouin scattering of laser light in condensed matter is concisely summarized. Then, the case of two relevant classes of complex materials in which Brillouin scattering can be measured is reviewed. First, in lowdensity, low-dimensional, disordered materials, the crossover between confinement and propagation is discussed on the basis of experimental findings. Moreover, the possibility of measuring the local mechanical properties of these materials at the mesoscale by Brillouin scattering is critically discussed. Second the application of Brillouin scattering to biological materials, a rather hot topic, is presented. The acoustic waves and their phonons Though the traditional ways to measure the mechanical properties of materials and, in particular, the elastic constants, are based on quasi-static deformation processes (e.g. the tensile test to measure the Young modulus), many important methods are acoustic in nature or make use of acoustic phenomena (ultrasound

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Section: Brillouin Spectroscopy From Biomaterialsmentioning

confidence: 99%

Brillouin scattering of phonons in complex materials

Bottani

Fioretto

2018

Advances in Physics: X

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“…Both assume linear stress-strain relationship, 19 and cannot resolve the direction-dependent mechanical behaviors. 20 Yet, in the case of deformation tests, the estimation of the Young's modulus is based on the assumed value of the Poisson's ratio. The frequently employed atomic force microscopy (AFM) indentation technique suffers from drawbacks originating from small contact forces in the probe-sample interaction, and the influence of the rigid substrate.…”

mentioning

confidence: 99%

Directional elastic wave propagation in high-aspect-ratio photoresist gratings: liquid infiltration and aging

Alonso-Redondo

Gueddida

et al. 2017

Nanoscale

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Determination of the mechanical properties of nanostructured soft materials and their composites in a quantitative manner is of great importance to improve the fidelity in their fabrication and to enable the subsequent reliable utility. Here, we report on the characterization of the elastic and photoelastic parameters of a periodic array of nanowalls (grating) by the non-invasive Brillouin light scattering technique and finite element calculations. The resolved elastic vibrational modes in high and low aspect ratio nanowalls reveal quantitative and qualitative differences related to the two-beam interference lithography fabrication and subsequent aging under ambient conditions. The phononic properties, namely the dispersion relations, can be drastically altered by changing the surrounding material of the nanowalls. Here we demonstrate that liquid infiltration turns the phononic function from a single-direction phonon-guiding to an anisotropic propagation along the two orthogonal directions. The susceptibility of the phononic behavior to the infiltrating liquid can be of unusual benefits, such as sensing and alteration of the materials under confinement.

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“…The ordered and amorphous regions provide the molecular basis that allows physical strength and extensibility in one fiber (Patil et al, 2014;Xu et al, 2014). This two-phased structural arrangement also contributes to phonon propagation bandgap along the fiber axis (Schneider et al, 2016).…”

Section: Molecular Basis Of Major Ampullate Spidroin Biomaterials Assmentioning

confidence: 99%

Advances in Plant-Derived Scaffold Proteins

2020

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Scaffold proteins form critical biomatrices that support cell adhesion and proliferation for regenerative medicine and drug screening. The increasing demand for such applications urges solutions for cost effective and sustainable supplies of hypoallergenic and biocompatible scaffold proteins. Here, we summarize recent efforts in obtaining plantderived biosynthetic spider silk analogue and the extracellular matrix protein, collagen. Both proteins are composed of a large number of tandem block repeats, which makes production in bacterial hosts challenging. Furthermore, post-translational modification of collagen is essential for its function which requires co-transformation of multiple copies of human prolyl 4-hydroxylase. We discuss our perspectives on how the GAANTRY system could potentially assist the production of native-sized spider dragline silk proteins and prolyl hydroxylated collagen. The potential of recombinant scaffold proteins in drug delivery and drug discovery is also addressed.

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Nonlinear control of high-frequency phonons in spider silk

Cited by 54 publications

References 33 publications

Brillouin scattering of phonons in complex materials

Brillouin scattering of phonons in complex materials

Directional elastic wave propagation in high-aspect-ratio photoresist gratings: liquid infiltration and aging

Advances in Plant-Derived Scaffold Proteins

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