Smart Window Goes Clear Or Opaque In Seconds
A new smart window system for use in green homes and buildings can go from 100% opaque to almost completely clear in seconds. According to its creators, the new smart window overcomes previous drawbacks to such systems, including lower cost, long-term performance and non-toxic manufacturing processes.
Ho Sun Lim, Jeong Ho Cho, Jooyong Kim and Chang Hwan Lee... discovered that using a polymer, so-called "counterions" and a solvent such as methanol was an inexpensive and less harsh way to make a stable, robust smart window. It has the added advantage of being extremely tunable — quickly and easily switching from 100% opaque to almost completely clear in seconds.
"To our knowledge, such extreme optical switching behavior is unprecedented among established smart windows," the authors state. "This type of light control system may provide a new option for saving on heating, cooling and lighting costs through managing the light transmitted into the interior of a house."
(Smart window details)
Smart windows that can reversibly alternate between extreme optical characteristics via clicking counteranions of different hydration energies were developed on glass substrates through the facile spray-casting of poly[2-(methacryloyloxy)ethyltrimethylammonium chloride-co-3-(trimethoxysilyl)propyl methacrylate]. The optical transmittance was either 90.9% or 0% over the whole spectral range when alternately immersed in solutions containing thiocyanate (SCN–) or bis(trifluoromethane)sulfonimide (TFSI–) ions, respectively. The extreme optical transitions were attributed to formation of microporous structures via the molecular aggregation of polyelectrolyte chains bearing TFSI– ions in methanol. Because the smart windows were either highly transparent toward or completely blocking of incident light upon direct counterion exchange, this kind of nanotechnology may provide a new platform for efficiently conserving on energy usage in the interior of buildings.
( Counterion-Induced Reversibly Switchable Transparency in Smart Windows )
SF fans may recall the polawindows from Frank Herbert's 1972 novel The Godmakers:
Orne returned to his room to change for dinner, stopped at the polawindow, which he tuned to clear transmission.
Scroll down for more stories in the same category. (Story submitted 9/21/2011)
Follow this kind of news @Technovelgy.
| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |
you like to contribute a story tip?
Get the URL of the story, and the related sf author, and add
Comment/Join discussion ( 1 )
Related News Stories -
Aequoreas Floating Village 3D Printed From Ocean Junk
'... the Floating Island chain of independent international corporate entities.' - Larry Niven, 2000.
PassivDom 3D Printed House - What If You Could Live Anywhere?
'The houses are prefabricated units...' - Clifford Simak, 1952.
Rosemont Hotel Dubai Has Lobby Rainforest
'The braided waterfalls and hanging gardens that spilled down the arcology's levels..' - Paolo Bacigalupi, 2015.
Would Movable Houses Make Cities Better?
'He saw a house in the suburbs gently slide out of its place...' - Jane Webb Loudon, 1828.
Technovelgy (that's tech-novel-gee!)
is devoted to the creative science inventions and ideas of sf authors. Look for
the Invention Category that interests
you, the Glossary, the Invention
Timeline, or see what's New.
Will A Steel Umbrella Stop Russia?
'Everyone was aware that the damned platform was wandering around in its own orbit...'
EVE Artificial Womb For Lambs (For Now)
'In the crimson darkness, stewing warm on their cushion of peritoneum and gorged with blood-surrogate and hormones...'
TIKAD Armed Drone Ready To Fight
'Each a television eye and a sonic stunner...'
Bees Royal Jelly Helps Wounds Heal Faster
'An alien drug... used by an insect race.'
NASA Wants To Make Oxygen On Mars
'They plop down on the Red and if the dust is deep enough ... they burrow in...'
Hackers Insert Malware Into DNA
'They tied the memory to the bloodline and that was their record!'
X2-VelociRoACH Cooperates To Launch Tiny Drones
Little robots cooperating can do big tasks. Eventually.
'Do Not Pay' Chatbots To Replace Law Firm Associates?
'I want my lawyer program.'
MULTI Model Of Star Trek Turbolift
Cool prototype video!
A Look Into The Future Of Spacecraft!
Ever wonder how you look when you enter a new part of a spacecraft?
An 'Ethical Black Box' For Robots?
Explored by science fiction authors.
Dadbot Digital Immortality
'A hardwired ROM cassette replicating a dead man's skills...'
Should We Permit Computers To Create Their Own Language?
'Talk Between Robots radio...'
Breakthrough Starshot Sprites Yearn For Alpha Centauri
'Whoever launched it fired a laser cannon...'
Kino Project Roaming Personal Fashion Robots
'Most of the crew have the tiny imp ride on their shoulder...'
Astronaut Exercise Video, Predicted By SF Writers
'Joe got out the gravity-simulator harnesses.'
More SF in the News Stories
More Beyond Technovelgy science news stories