Order-Disorder Transition of Aragonite Nanoparticles in Nacre

Huang, Zaiwang; Li, Xiaodong

doi:10.1103/physrevlett.109.025501

Cited by 44 publications

(26 citation statements)

References 31 publications

(39 reference statements)

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“…These nanoparticles are basic building blocks in nacre and assembled into individual pseudo-single-crystal aragonite platelets, which jointly scatter into spot arrays in the electron diffraction pattern1920. The nanoparticle-architecture is ascribed to play an important role in nacre's toughness amplification in conjunction with the “brick-mortar” microarchitecture172122.…”

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confidence: 99%

Origin of flaw-tolerance in nacre

Huang

2013

Sci Rep

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Over the past decades, our understanding of nacre's toughening origin has long stayed at the level of crack deflection along the biopolymer interface between aragonite platelets. It has been widely thought that the ceramic aragonite platelets in nacre invariably remain shielded from the propagating crack. Here we report an unexpected experimental observation that the propagating crack, surprisingly, invades the aragonite platelet following a zigzag crack propagation trajectory. The toughening origin of previously-thought brittle aragonite platelet is ascribed to its unique nanoparticle-architecture, which tunes crack propagation inside the aragonite platelet in an intergranular manner. For comparison, we also investigated the crack behavior in geologic aragonite mineral (pure monocrystal) and found that the crack propagates in a cleavage fashion, in sharp contrast with the intergranular cracking in the aragonite platelet of nacre. These two fundamentally different cracking mechanisms uncover a new toughening strategy in nacre's hierarchical flaw-tolerance design.

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confidence: 99%

Origin of flaw-tolerance in nacre

Huang

2013

Sci Rep

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“…Transverse-gradient undulators (TGUs) have been proposed to enhance FEL performance for large energy spread beams [32]. An obvious problem here is that conventional FODO optics is not suitable for use with such undulators of substantial length, since constant high dispersion cannot be then maintained.…”

Section: Transverse-gradient Undulatormentioning

confidence: 99%

Feasibility of a ring FEL at low emittance storage rings

Agapov¹

2015

Nuclear Instruments and Methods in Physics Research Section A:

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“…Compared to pure aragonite, nacre is one fold higher in tensile strength and 1000-fold tougher in fracture toughness [1,2]. The supreme mechanical properties of nacre are attributed to the particular arrangement of this organic-inorganic composite [3][4][5]. The platelet-shaped aragonite forms a layered structure and the protein between these inorganic layers serves as an organic adhesive [6,7].…”

Section: Introductionmentioning

confidence: 97%