Stories
Slash Boxes
Comments

SoylentNews is people

posted by janrinok on Sunday November 23 2014, @07:40PM   Printer-friendly [Skip to comment(s)]
from the there-is-always-blow-on-money... dept.

Scientific American reports that simply breathing on money could soon reveal if it's the real deal or counterfeit thanks to a photonic crystal ink developed by Ling Bai and Zhongze Gu and colleagues at Southeast University in Nanjing, China that can produce unique color changing patterns on surfaces with an inkjet printer system which would be extremely hard for fraudsters to reproduce. The ink mimics the way Tmesisternus isabellae – a species of longhorn beetle – reversibly switches its color from gold to red according to the humidity in its environment. The color shift is caused by the adsorption of water vapor in their hardened front wings, which alters the thickness and average refractive index of their multi-layered scales.

To emulate this, the team made their photonic crystal ink using mesoporous silica nanoparticles, which have a large surface area and strong vapor adsorption capabilities that can be precisely controlled. The complicated and reversible multi-color shifts of mesoporous CPC patterns are favorable for immediate recognition by naked eyes but hard to copy. "We think the ink's multiple security features may be useful for anti-fraud applications," says Bai, "however we think the technology could be more useful for fabricating multiple functional sensor arrays, which we are now working towards."

This discussion has been archived. No new comments can be posted.
Display Options Threshold/Breakthrough Mark All as Read Mark All as Unread
The Fine Print: The following comments are owned by whoever posted them. We are not responsible for them in any way.
  • (Score: 0) by Anonymous Coward on Sunday November 23 2014, @08:12PM

    by Anonymous Coward on Sunday November 23 2014, @08:12PM (#119190)

    There's a Mt. Gox joke in here somewhere.

  • (Score: 1) by Pseudonymous Coward on Sunday November 23 2014, @08:15PM

    by Pseudonymous Coward (4624) on Sunday November 23 2014, @08:15PM (#119192)

    It's not like any of this will backfire with Ebola going around and stuff!

    • (Score: 0) by Anonymous Coward on Sunday November 23 2014, @09:09PM

      by Anonymous Coward on Sunday November 23 2014, @09:09PM (#119197)

      I think that might be the idea.

  • (Score: 2) by c0lo on Sunday November 23 2014, @10:07PM

    by c0lo (156) Subscriber Badge on Sunday November 23 2014, @10:07PM (#119212) Journal
    My first reading of TFT was "Blow On Monkey to Tell If It Is Counterfeit"
    --
    https://www.youtube.com/watch?v=aoFiw2jMy-0
  • (Score: 2) by c0lo on Sunday November 23 2014, @10:21PM

    by c0lo (156) Subscriber Badge on Sunday November 23 2014, @10:21PM (#119219) Journal
    I like better the "multiple functional sensor arrays" research direction. 'Cause security (no matter money or such) has this annoying section of "denial of service: e.g. what if drenching your money with some soapy water, will they expose the same reaction to humidity once they dry?
    --
    https://www.youtube.com/watch?v=aoFiw2jMy-0
    • (Score: 3, Funny) by mhajicek on Sunday November 23 2014, @11:49PM

      by mhajicek (51) on Sunday November 23 2014, @11:49PM (#119257)

      Don't you know money laundering is illegal?

  • (Score: 2) by Snotnose on Monday November 24 2014, @12:09AM

    by Snotnose (1623) on Monday November 24 2014, @12:09AM (#119263)

    Compared to "blow for money"?

    --
    Having a big nose is no reason to not wear a mask. I mean, I still wear underwear....
  • (Score: 2) by aristarchus on Monday November 24 2014, @03:05AM

    by aristarchus (2645) on Monday November 24 2014, @03:05AM (#119294) Journal

    Funny how the only requirement for money these days is that it be non-copyable. Whether it's BlowBills or BitCoin, the only thing that makes it money is how hard it is to make your own.

    --
    Someone please explain to Hemo that my AC posts never get moderated because no one understands them. (Stolen AC sig. )
    • (Score: 2) by jcross on Monday November 24 2014, @02:34PM

      by jcross (4009) on Monday November 24 2014, @02:34PM (#119411)

      Is there some type of money that isn't that way? Seems to me like even gold and cowrie shells have that property.

      • (Score: 2) by jcross on Monday November 24 2014, @02:39PM

        by jcross (4009) on Monday November 24 2014, @02:39PM (#119414)

        I guess that unlike BitCoins, gold and cowrie shells are also pretty, but then shiny beetle wing ink could be as well.

    • (Score: 1) by monster on Monday November 24 2014, @05:33PM

      by monster (1260) on Monday November 24 2014, @05:33PM (#119477) Journal

      It was always that way. What it requires now, and may be a problem for this tech to be used, is to also be cheaper to produce than its nominal value.

      Copper cents were retired because of that. Even the low value euro cents are in danger of disappearing (not just being substituted, but outright retirement) because of it.

  • (Score: 1) by Mesa Mike on Monday November 24 2014, @07:46PM

    by Mesa Mike (2788) on Monday November 24 2014, @07:46PM (#119528)

    I always blow all my money shortly after getting paid.