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Complex microtubule structures are present in resting cells and in dividing cells. In resting cells, they are responsible for maintaining the cellular architecture, tracks for intracellular transport, positioning of organelles, assembly of cilia and flagella. They mediate the bipolar spindle assembly for chromosomal segregation and positioning of the cell division plate in dividing cells. The formation of microtubule complex structures depends on the cell type, cell stage, and cell function.
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Wood's structural properties derive from fibers aligned along the tree's length, contributing significantly to its mechanical strength. Wood exhibits up to twenty times greater tensile strength along these fibers compared to across them, and generally shows better performance under compression than tension. The length of fibers varies, with hardwoods having fibers around one twenty-fifth inch long and softwoods ranging from one-eighth to one-third inch.
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Shortly after de Broglie published his ideas that the electron in a hydrogen atom could be better thought of as being a circular standing wave instead of a particle moving in quantized circular orbits, Erwin Schrödinger extended de Broglie’s work by deriving what is now known as the Schrödinger equation. When Schrödinger applied his equation to hydrogen-like atoms, he was able to reproduce Bohr’s expression for the energy and, thus, the Rydberg formula governing hydrogen spectra.
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Self-Assembled Ag-MXA Superclusters with Structure-Dependent Mechanical Properties.

Xiaoyun Qin1,2, Dan Luo1,2,3, Zhenjie Xue1,2

  • 1Beijing National Laboratory for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.

Advanced Materials (Deerfield Beach, Fla.)
|January 16, 2018
PubMed
Summary
This summary is machine-generated.

Researchers developed a fast method to create nanoparticle superstructures with tunable mechanical properties. These plastic, moldable superclusters could enable new applications for nanocrystals in everyday life.

Keywords:
mechanical propertiesself-assemblystructure-dependentsuperclusters

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Supramolecular Chemistry

Background:

  • Nanoparticle superstructures face challenges in mechanical properties and fabrication time, limiting their practical applications.
  • Enhanced inter-nanoparticle interactions are key to improving mechanical features in crystalline assemblies.

Purpose of the Study:

  • To develop a rapid and scalable method for fabricating 2D silver-mercaptoalkyl acid superclusters.
  • To investigate the structure-dependent mechanical properties of these superclusters.

Main Methods:

  • A straightforward synthetic strategy was employed for the fast and scalable fabrication of 2D silver-mercaptoalkyl acid superclusters.
  • Exploration of hexagonal and lamellar topologies.
  • Analysis of the influence of tether length and silver-to-tether ratio on elastic modulus.

Main Results:

  • Successfully fabricated 2D silver-mercaptoalkyl acid superclusters with hexagonal or lamellar topologies.
  • Demonstrated that the elastic modulus is dependent on the supercluster's structure, specifically tether length and component ratios.
  • Observed that these superclusters are plastic and moldable to macroscopic dimensions.

Conclusions:

  • The developed method offers a fast and scalable route to ordered nanoparticle superstructures.
  • Tunable mechanical properties of these superclusters open possibilities for integrating nanocrystal properties into macroscopic applications.