asteroza + lattice   31

Massive Dirac fermions in a ferromagnetic kagome metal | Nature
kagome lattices may allow room temperature superconductors by employing topological effects with quantum hall effects.
materials  science  research  technology  kagome  crystal  lattice  superconductor  quantum  hall  effect 
march 2018 by asteroza
[1708.09539] Coherent Atomically-Thin Superlattices with Engineered Strain
Stiching 3 molecule thick crystal lattices together. Notably, they made an LED, and could mess with the color output by stretching the thin film, which suggests a new variable color LED method.
materials  science  research  technology  thin  crystal  superlattice  lattice  LED 
march 2018 by asteroza
Phys. Rev. Lett. 117, 175901 (2016) - Lightweight Mechanical Metamaterials with ...
Using a cubic octet truss with internal members made of different materials, the internal expansion causes macro compression of the unit cell, shrinking things overall, achieving a negative thermal expansion coefficient metamaterial, of sorts.
negative  thermal  expansion  cubic  octet  truss  3D  printing  fabbing  materials  science  research  technology  shrink  structure  microlattice  lattice  composite  Delicious 
october 2016 by asteroza
Additive manufacturing of polymer-derived ceramics
UV cured polymer resin with cermaic particles gets printed as a microlattice, then sintered into a pure silicon carbide microlattice, similar to ceramic foams but with 10x strength.
3D  printing  fabbing  materials  science  research  technology  silicon  oxycarbide  carbide  ceramic  microlattice  lattice  truss  octet  cubic  polymer  template  sintering  Delicious 
january 2016 by asteroza
High-performance bulk thermoelectrics with all-scale hierarchical architectures : Nature : Nature Publishing Group
New lead telluride material with a ZT of 2.2 for a deltaT around 600K at a 677C/77C hot/cold split. Makes thermoelectrics borderline practical for hot engine applications.
lead  telluride  PbTe  materials  science  research  technology  nanotechnology  nanostructure  structure  lattice  thermal  conductivity  control  high  ZT  thermoelectric  power  generator  waste  heat  energy  recovery  green  CHP  Delicious 
september 2012 by asteroza
Ultralight Metallic Microlattices
Lightweight nickel lattice structure. They claim it is the lightest material currently known. Structure should be possible with other materials. Uses semiconductor lithography techniques to make a polymer template, plate the template, then etch the polymer away.
nickel  lightweight  lattice  microlattice  engineered  material  materials  science  technology  research  porous  structure  cubic  octet  truss  metal  Delicious 
november 2011 by asteroza
Batteries charge very quickly and retain capacity, thanks to new structure | News Bureau | University of Illinois
Interesting, using Styrofoam beads as a temporary lattice building framework to make a metal lattice, which is later covered with the final thin film. This creates a very high surface area, allowing super fast charging. But, still like SCiB batteries, it seems the energy density is lower than conventional electrode batteries of the same type (around 75%) . A worthy flaw to allow fast charging? But that doesn't get around the high amperage issues of fast charging, and there is the scary part about fast accidental discharge, so you face the same issues as ultracapacitors.
battery  design  thin  film  lattice  self  assembly  materials  science  research  technology  manufacturing  production  fast  high  recharge  charge  charging  recharging  rate  electrode  Delicious 
march 2011 by asteroza

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