Your Next Smartphone May Have A Self-Healing Screen

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While smartphones continue to get increasingly sophisticated and resilient, the same cannot be said about the display screen. The Gorilla Glass cover used for most high-end cell phones tends to shatter easily, leaving owners with little choice but to pay for an expensive replacement screen or buy a new device altogether. However, this issue may soon be a thing of the past thanks to a new self-healing, Wolverine-inspired material which automatically repairs itself within 24 hours.

Dr. Chao Wang, the leading researcher of the UC Riverside team who developed the material, says, “When I was young, my idol was Wolverine from the X-Men. He could save the world, but only because he could heal himself. A self-healing material, when carved into two parts, can go back together like nothing has happened, just like our human skin. I’ve been researching making a self-healing lithium ion battery, so when you drop your cell phone, it could fix itself and last much longer.”

Testing the new polymer (Photo Credit: Wang Labs)

Cell phones with self-healing technology is not a new concept — the LG smartphone model G Flex 2, released in 2015, already has a self-healing back panel which can repair everyday scratches within minutes. However, the material is held together by hydrogen bonds that are unable to conduct electricity and hence unsuitable for display screens, given that most smartphones rely on a grid of electrodes underneath the screen. When the human finger touches the screen, a tiny electrical charge transfers to the finger to complete the circuit and tells the phone what you are trying to accomplish.

How touchscreens work (Image Credit: By Mercury13 [CC BY-SA 3.0 via Wikimedia Commons)

To overcome the shortcoming, the UC Riverside team turned to a different kind of chemical bonding. Called ion-dipole interaction, it is a type of intermolecular force between fully charged ions and partially charged polar molecules.

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For their self-healing material, the researchers selected salt ions and a transparent polymer that can be stretched to 50 times its normal size.

To see if it worked, the scientists tore it in half. Sure enough, the dynamic bond between the ions and polymer molecules caused the torn parts to align themselves back to their original configuration within a day.

To test the material’s conductivity, the researchers created an “artificial muscle” by placing a non-conductive membrane between two layers of the newly created material. When an electric current was applied, the “artificial muscle” responded by moving, similar to how the human bicep moves upon receiving a signal from the brain.

Wang, who presented his research at the 253rd National Meeting & Exposition of the American Chemical Society (ACS) on April 4, says, “Ion-dipole interactions have never been used for designing a self-healing polymer, but it turns out that they’re particularly suitable for ionic conductors.”

Photo Credit: Wang Labs

The team now plans to work on improving the properties of the polymer so that is it durable even when exposed to harsh external conditions such as high humidity. According to Wang, previous self-healing polymers have not held up well when exposed to moisture, and therefore, not been useful for real-world applications. The optimistic researcher believes that self-healing cell phone screens will be a reality within just three years! We sure hope he is right!


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Reading Comprehension (8 questions)

  1. What is the problem with current smartphone screens?
  2. How will the new material help solve it?

Critical Thinking Challenge

What other uses can you see for this self-healing material?

Vocabulary in Context

“When the human finger touches the screen, a tiny electrical charge transfers to the finger to complete the circuit and tells the phone what you are trying to accomplish...

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  • DustinTuesday, September 19, 2017 at 9:27 am
    i agree with you anime...not
    • AnimeTuesday, September 19, 2017 at 8:06 am
      Just use a flip phone. those things don't break.
      • DustinMonday, September 18, 2017 at 11:10 am
        this is such a cool idea, im doing my project on this
        • HaleytWednesday, September 13, 2017 at 8:53 am
          I think its just smarter to just pay for a shatter proof phone, but this idea is cool
          • jjyoder
            jjyoderWednesday, September 13, 2017 at 6:16 am
            my brother needs a phone docter I guess he could take this for his shatterd screen
            • alexplays003
              alexplays003Friday, September 8, 2017 at 7:20 am
              I need that! xD
              • UnknownThursday, September 7, 2017 at 2:31 pm
                my class has a project to do. I'm definitely doing it on this. Only has to be about five mins long so this is good.
                • Camdog Thursday, September 7, 2017 at 12:12 pm
                  Me too
                  • jjyoder
                    jjyoderWednesday, September 13, 2017 at 6:16 am
                    me three
                  • joeWednesday, September 6, 2017 at 1:22 pm
                    i need this phone
                    • UnknownWednesday, September 6, 2017 at 10:56 am
                      Omg so cool i need one

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