asteroza + silicon   133

Open Lunar Foundation
Space Bros think $3billion should be enough for a moon base on commercial launches...
moon  moonbase  base  silicon  valley  space  newspace 
september 2019 by asteroza
Identification of the mechanism responsible for the boron oxygen light induced degradation in silicon photovoltaic cells: Journal of Applied Physics: Vol 125, No 18
PV solar cell degradation actually has a previously unseen mechanism, which has now been identified. It appears the solution to "repair" degraded solar panels (increase effective lifetime) is to heat them in the dark for a few minutes at 200C, but that only resets the lifetime and doesn't prevent degradation? Unfortunately, wire solder melts at below 200C, so you can't just bake an old panel in your home oven to fix it or the interconnects will dribble out.
PC  solar  panel  cell  silicon  light  degradation  lifetime  mechanism  physics  chemistry  materials  science  research  technology 
june 2019 by asteroza
CCT Energy Storage
energy extraction from molten silicon via unidentified heat engine, wonder if it's a TPV since they claim only 3 moving parts...
molten  silicon  thermal  energy  storage  battery  hardware  electronics  devices 
april 2019 by asteroza
"Economic advantages of dry-etched black silicon in passivated emitter " by Chiara Modanese, Hannu S. Laine et al.
Using a surface treatment on black multicrystalline silicon, net cost is lower than conventional silicon solar cells (10% less)
black  silicon  atomic  layer  deposition  solar  PV  cell  manufacturing  cost  materials  science  research  technology  multicrystalline 
september 2018 by asteroza
IFEs batteriforskere har knekt batteri-kode: Kan revolusjonere rekkevidde og levetid — IFE
SiliconX, aka IFE silicon alloy, a silicon nanoparticle composite, might be a future battery anode
batery  anode  materials  science  research  technology  SiliconX  silicon  nanoparticle  composite  IFE  alloy 
july 2018 by asteroza – Energy for all, at all times
appears to use an externally fired gas turbine for power production, but no indicator of how they heat it
molten  silicon  thermal  energy  storage 
june 2018 by asteroza
NACC-FIRES is predicated on cheap brick heated by resistance heaters, but I wonder if you could do something like this, where you use the induction furnace to melt the silicon, and bubble the air through somehow...
molten  silicon  thermal  energy  storage 
june 2018 by asteroza
Very high temperature (up to 1400C) molten silicon thermal energy storage. The kicker seems to be using concentrated solar power to melt, and a thermophotovoltaic system to recover power rather than a brayton cycle turbine using an intermediary fluid.
molten  silicon  thermal  energy  storage  concentrating  solar  thermophotovoltaic  TPV  power  generator 
june 2018 by asteroza
Non‐Volatile Silicon Photonics Using Nanoscale Flash Memory Technology - Grajower - - Laser & Photonics Reviews - Wiley Online Library
MONOS allows using conventional NAND flash CMOS manufacturing techniques to yield potentially terahertz speed circuits. Heat is probably still a problem, but this may make chip internal optics easier, as well the mentioned filter/switch/modulator/resonater/laser optics applications
metal  oxide  nitride  silicon  semiconductor  terahertz  IC  circuit  research  technology  manufacturing  optics  optonics  photonics  photonic  materials  science 
march 2018 by asteroza
Adaptive metalenses with simultaneous electrical control of focal length, astigmatism, and shift | Science Advances
Interesting thing film metalens manipulated by transparent polymer artificial muscle to fix focus/image shift/astigmatism simultaneously
materials  science  research  technology  artificial  eye  polymer  muscle  silicon  thin  film  metalens  optics  nanotechnology 
march 2018 by asteroza
Ultrahard carbon film from epitaxial two-layer graphene | Nature Nanotechnology
SiC coated with exactly two layers of aligned graphene can turn into diamene, a temporary state that is harder than bulk diamond, when compressed at room temperature. Sorta like those shear thickening liquid armors.
defense  military  armor  shear  thickening  hardening  diamene  graphene  silicon  carbide  materials  science  research  technology  nanotechnology 
december 2017 by asteroza
Working on molten silicon thermal energy storage
EU  europe  molten  silicon  boron  high  temperature  thermal  energy  storage  TIPV  thermionic  photovoltaic  conversion 
august 2017 by asteroza
How HBO’s Silicon Valley built “Not Hotdog” with mobile TensorFlow, Keras & React Native – Medium
How Not Notdog the app was built. Lots of interesting tricks, though some of the practical tuning tips may be dependent on the small neural network size and focus on recognizing one thing...
humor  HBO  silicon  valley  not  hotdog  app  software  iOS  iPhone  android  machine  vision  deep  leaning  computer  mobile  TensorFlow  Keras  react.js  nerual  network  training 
june 2017 by asteroza
An 8X8 Heterodyne Lens-less OPA Camera
lensless camera by using an optical phased array (in silicon photonics)
silicon  photonics  optics  research  technology  optical  phased  array  lensless  camera  OPA 
june 2017 by asteroza
Velcro®-Inspired SiC Fuzzy Fibers for Aerospace Applications - ACS Applied Mater...
Coating silicon carbide fibers with fuzzy silicon carbide nanotubes/nanowire like a velco surface of fuzzy fibers improves composite ceramic performance in high heat applications.
silicon  carbide  nanotube  nanofiber  reinforced  composite  ceramic  materials  science  research  technology  velcro  surface  treatment  fiber  fuzzy  Delicious 
march 2017 by asteroza
Transparent polycrystalline cubic silicon nitride : Scientific Reports
Neat, but requires twice the pressure to make compared to diamond, then again it can work in a hotter regime. Good for engine optical monitoring ports?
transparent  cubic  silicon  nitride  ceramic  spinel  materials  science  research  technology  Delicious 
march 2017 by asteroza – Energy for all, at all times
Interesting molten silicon based thermal energy storage battery. But melt point is 1414C...
high  temperature  thermal  energy  storage  battery  TESS  molten  silicon  Delicious 
february 2017 by asteroza
High thermal conductivity in polaritonic SiO2 nanoparticle beds - Materials Hori...
A heat transfer material that electrically insulates, apparently the surface phonon effect starts at 50C, so easy to use with electronics.
silicon  dioxide  SiO2  nanoparticle  packed  particle  bed  thermal  conductor  surface  phonon  polariton  macroscopic  heat  transfer  ethylene  glycol  cooling  Delicious 
july 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
Optics InfoBase: Optica - Flexible photonic metastructures for tunable coloration
Interesting method for structured color changing. If they can get MEMS actuators to flex the silicone substrate on demand, you have a real chameleon skin cloak.
high  contrast  metastructure  silicon  bar  grating  flexible  silicone  backing  substrate  structural  color  chameleon  skin  materials  science  research  technology  camouflage  Delicious 
march 2015 by asteroza
Enhanced photovoltaics inspired by the fovea centralis : Scientific Reports : Nature Publishing Group
Interesting nanostructure research to improve solar cell efficiency by improving light capture. The takeaway is that straight right cylinder nanowires actually perform worse than nanowires with uneven shapes, one extreme being a nanofunnel (wouldn't this be more like a cone or frustrum though?)
silicon  nanofunnel  microfunnel  funnel  structure  nanostructure  surface  plasmon  light  trap  solar  cell  materials  science  physics  research  technology  nanotechnology  nanowire  Delicious 
february 2015 by asteroza
Passive radiative cooling below ambient air temperature under direct sunlight : Nature : Nature Publishing Group
Interesting mixed material which re-emits heat at atmospheric IR transparency windows, effectively becoming a passive cooler. So an external radiator on earth covered with this paint can get pretty cool.
photonic  radiative  cooling  solar  radiator  mirror  selective  thermal  emitter  materials  science  research  technology  passive  hafnium  silicon  dioxide  tuned  cooler  nanoparticle  layer  IR  infrared  transparency  window  atmospheric  green  paint  surface  treatment  Delicious 
december 2014 by asteroza
Armor Applications
Interesting hollow silicon carbide ceramic shells impregnating metal to create metal foam armor.
low  weight  lightweight  syntactic  armor  plate  silicon  carbide  ceramic  hollow  shell  sphere  defense  military  research  technology  metal  foam  Delicious 
november 2014 by asteroza
RSI Silicon
Uses a novel process to make solar grade silicon. But the interesting point is they make/use high purity carbon derived from sugar sent through an arc furnace...
solar  silicon  production  carbon  Delicious 
september 2014 by asteroza
Optics InfoBase: Optica - Radiative cooling of solar cells
Etching silicon pyramids to increase surface area on a silicon PV cell improves heat rejection
solar  PV  cell  radiative  cooling  silicon  pyramid  structure  radiator  surface  treatment  Delicious 
august 2014 by asteroza
Carbon-fiber epoxy honeycombs mimic the material performance of balsa wood | Harvard School of Engineering and Applied Sciences
Interesting way of making honeycomb structures but the fiber alignment direction is not ideal, so it stiffens it up but not in ideal directions.
3D  printing  fabbing  technique  materials  science  research  technology  nanoclay  platelet  silicon  carbide  whisker  chopped  carbon  fiber  thermoset  epoxy  composite  honeycomb  cellular  structure  Delicious 
june 2014 by asteroza
Empa - Shape Memory Alloys - A shape-conscious alloy
Low temp iron based SMA's make SMA reinforced prestressed concrete beams practical, which can be prestressed without elaborate tensioning systems. The only issue is the 160 degree transition temperature means if such a beam ever got exposed to a vehicle fire, it might fail faster than conventional prestressed concrete using steel rebar...
iron  manganese  silicon  SMA  shape  memory  alloy  metal  materials  science  research  technology  prestressed  concrete  tension  rebar  alternative  construction  building  architecture  Delicious 
june 2014 by asteroza
How to tap the sun’s energy through heat as well as light - MIT News Office
CNT absorber fronting a photonic crystal matched to a PV cell to make a new higher performance solar thermophotovoltaic power generator.
nanphotonic  photonic  crystal  solar  thermophotovoltaic  CNT  carbon  nanotube  heat  absorber  silicon  dioxide  emitter  PV  cell  high  temperature  power  generator  green  energy  materials  science  research  technology  nanotechnology  two  layer  STPV  Delicious 
january 2014 by asteroza
Point of Light | Caltech
By proxy, exceeding the diffraction limit of visible wavelength light using surface plasmon polaritons on a nanoscale silicon dioxide waveguide.
optics  nanotechnology  technology  research  science  materials  physics  dioxide  silicon  waveguide  focus  limit  diffraction  light  visible  polariton  plasmon  surface  SPP  Delicious 
december 2012 by asteroza
Bonding-induced thermal conductance enhancement at inorganic heterointerfaces using nanomolecular monolayers : Nature Materials : Nature Publishing Group
Basically a form of phonon impedance fuzzing, by sticking an intermediate material (the nanolayer monolayer) that has intermediate phonon properties, to allow transmission of the phonon across the change in materials, when they would otherwise be reflected back at the materials interface. The short form is improved heat transfer from silicon CPU's to copper heatsinks, assuming you can get the thermal interface layer right. Not for amateurs.
technology  research  science  materials  silicon  copper  transfer  heatsink  heat  impedance  phonon  interfacial  conductivity  conductance  interface  thermal  nanocomposite  nanomolecular  NML  nanoglue  monolayer  nanolayer  Delicious 
december 2012 by asteroza
natcore technology - advancing solar science - solar energy cells
Apparently they have perfected a liquid phase deposition chemical technique for applying black silicon to wafers, which makes black silicon based solar cells commercially viable. Promising 3% improvement over existing silicon based PV.
energy  green  generator  power  silicon  black  cell  solar  deposition  phase  liquid  research  technology  science  materials  manufacturing  Delicious 
november 2012 by asteroza
Lilliputian Systems
Silicon wafer based SOFC, claiming 40% direct chemical to electrical efficiency. Apparently Brookstone will be carrying the SOFC as a portable charger pack for small electronics like cellphones. Uses butane apparently, so is aircraft approved, and relatively easy to get replacement fuel (conventional lighter butane ought to work). Wonder how it operates on natural gas, which isn't pure methane...
silicon  wafer  SOFC  solid  oxide  fuelcell  thin  film  surface  coating  materials  science  research  technology  compact  small  form  factor  power  generator  green  energy  butane  Delicious 
may 2012 by asteroza
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