Ultralarge elastic deformation of nanoscale diamond

Banerjee, Amit; Bernoulli, Daniel; Zhang, Hongti; Yuen, Muk-Fung; Liu, Jiabin; Dong, Jichen; Ding, Feng; Lü, Jian; Dao, Ming; Zhang, Wenjun; Lü, Yang; Suresh, S.

doi:10.1126/science.aar4165

Cited by 259 publications

(179 citation statements)

References 41 publications

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“…Hence, our perception of materials being hard or stiff is often inaccurate at the nanoscopic level, as illustrated by the many examples of cells deforming nanostructures made from macroscopically stiff materials . Even diamond nanoneedles undergo large elastic deformations at the nanoscale . While stiffness‐related effects have been studied extensively, and shown to influence biological response, there lacks a clear and consistent approach to measuring the impact of this behavior.…”

Section: Resultsmentioning

confidence: 99%

High‐Aspect‐Ratio Nanostructured Surfaces as Biological Metamaterials

et al. 2020

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Materials patterned with high‐aspect‐ratio nanostructures have features on similar length scales to cellular components. These surfaces are an extreme topography on the cellular level and have become useful tools for perturbing and sensing the cellular environment. Motivation comes from the ability of high‐aspect‐ratio nanostructures to deliver cargoes into cells and tissues, access the intracellular environment, and control cell behavior. These structures directly perturb cells' ability to sense and respond to external forces, influencing cell fate, and enabling new mechanistic studies. Through careful design of their nanoscale structure, these systems act as biological metamaterials, eliciting unusual biological responses. While predominantly used to interface eukaryotic cells, there is growing interest in nonanimal and prokaryotic cell interfacing. Both experimental and theoretical studies have attempted to develop a mechanistic understanding for the observed behaviors, predominantly focusing on the cell–nanostructure interface. This review considers how high‐aspect‐ratio nanostructured surfaces are used to both stimulate and sense biological systems.

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Section: Resultsmentioning

confidence: 99%

High‐Aspect‐Ratio Nanostructured Surfaces as Biological Metamaterials

et al. 2020

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“…Recently, elastic deformation of diamond nanopillars was investigated by in situ nanoscale indentation that demonstrated reversible elastic deformation of diamond . Here we leverage recent advances in diamond nanofabrication and a contact‐free electrostatic deformation technique to show unprecedented plastic deformation of diamond nanopillars.…”

mentioning

confidence: 94%

“…The third stretching simulation employs a nanopillar with (111) orientation, and in this case (Figure c) and pink curve in Figure d brittle fracture occurs along a (111) plane. The critical strain for fracture is 13%, in excellent agreement with recent density functional theory (DFT) calculations which found the same value.…”

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confidence: 95%

Plastic Deformation of Single‐Crystal Diamond Nanopillars

et al. 2020

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Diamond is known to possess a range of extraordinary properties that include exceptional mechanical stability. In this work, it is demonstrated that nanoscale diamond pillars can undergo not only elastic deformation (and brittle fracture), but also a new form of plastic deformation that depends critically on the nanopillar dimensions and crystallographic orientation of the diamond. The plastic deformation can be explained by the emergence of an ordered allotrope of carbon that is termed O8‐carbon. The new phase is predicted by simulations of the deformation dynamics, which show how the sp3 bonds of (001)‐oriented diamond restructure into O8‐carbon in localized regions of deforming diamond nanopillars. The results demonstrate unprecedented mechanical behavior of diamond, and provide important insights into deformation dynamics of nanostructured materials.

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“…The N 2 adsorption/desorption isotherms indicate the characteristics of dense structure of the nanofibers (Brunauer–Emmett–Teller (BET) surface area: 5.07 m 2 g −1 ). The dense structure and relatively smooth surface of the nanofibers were beneficial for the improvement of the mechanical properties due to reduced internal defects . It is worthwhile mentioning that the relatively large diameter of Al 2 O 3 ‐La 2 O 3 nanofibers, dense structure, thermal stability, and excellent flexibility would be critical for the subsequent self‐assembly process.…”

Section: Resultsmentioning

confidence: 99%

Self‐Assembly of Perovskite Crystals Anchored Al₂O₃‐La₂O₃ Nanofibrous Membranes with Robust Flexibility and Luminescence

Han

Cui

et al. 2018

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Inorganic luminescent materials as one of the important high-performance materials are widely used for industry and scientific research, mainly owing to their outstanding luminescence properties. However, inorganic luminescent materials are typically brittle and inelastic, which greatly limit their use in practical applications, particularly in flexible optoelectronic devices. In this work, it is shown that "plum-pudding" like CsPbBr /Cs PbBr perovskite crystals anchor onto Al O -La O (CCAL) nanofibrous membranes, which are synthesized via a facile electrospinning and subsequent supersaturated recrystallization process. The as-synthesized CCAL membranes exhibit outstanding mechanical flexibility and luminescence properties. Meanwhile, the crystal structure and luminous performance of the CCAL membranes are regulated by different molar ratios of CsBr/PbBr . The photoluminescence reaches a maximum value for the CCAL membranes produced with a CsBr/PbBr ratio of 1, and shows a narrow emission line-width of 18 nm. Furthermore, the potential applications of the CCAL nanofibrous membranes in green light devices through a remote nanofibrous membranes packaging approach are demonstrated. A pure green emission is achieved with the Commission Internationale de L'Eclairage color coordinates of (0.28, 0.65). This facile strategy would open a new avenue to flexible inorganic luminescent materials for the lighting and backlight display industries.

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Ultralarge elastic deformation of nanoscale diamond

Cited by 259 publications

References 41 publications

High‐Aspect‐Ratio Nanostructured Surfaces as Biological Metamaterials

High‐Aspect‐Ratio Nanostructured Surfaces as Biological Metamaterials

Plastic Deformation of Single‐Crystal Diamond Nanopillars

Self‐Assembly of Perovskite Crystals Anchored Al₂O₃‐La₂O₃ Nanofibrous Membranes with Robust Flexibility and Luminescence

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Ultralarge elastic deformation of nanoscale diamond

Cited by 259 publications

References 41 publications

High‐Aspect‐Ratio Nanostructured Surfaces as Biological Metamaterials

High‐Aspect‐Ratio Nanostructured Surfaces as Biological Metamaterials

Plastic Deformation of Single‐Crystal Diamond Nanopillars

Self‐Assembly of Perovskite Crystals Anchored Al2O3‐La2O3 Nanofibrous Membranes with Robust Flexibility and Luminescence

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Self‐Assembly of Perovskite Crystals Anchored Al₂O₃‐La₂O₃ Nanofibrous Membranes with Robust Flexibility and Luminescence