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retrieved from: http://blogs.rsc.org/cc/2016/09/01/3d-graphene-adds-dimension-to-deaf%E2%80%93mute-communication/
Chinese scientists have developed wearable
electronic device with conductive 3D graphene structure to translate sign
language into written text. This technology can be applied by injecting
graphene ink from a syringe under printed electronic field. For medical field,
such as adhesive patches which determine heart, brain signal and neural activity,
wearable and bio-integrated medical devices are very important.
Due to noticeable properties of cast graphene,
for example a 2D honeycomb lattice, excellent mechanical and electrical behaviors,
Graphene has an important material in warble technology. However, it is
difficult to preserve advantages of Graphene material in a 3D material which
has an information about forces from every angle.
Yanlin Song and co-workers at the University of the Chinese Academy of Sciences,
Beijing, and Shenyang Jianzhu University, Shenyang, have recently developed a
3D graphene material which is consisting of air-filled voids providing it to be
compressed and stretched in any directions. To determine the body movements
from electrical senses, aerogel is generally used because of its conductivity
varies with physical deformations. Graphene could recognize hand gestures and
translate them into written and spoken languages by the help of aerogel
equipped with electrodes in poly(dimethylsiloxane). The researchers stated that
aerogel, which is used in quite traditional printing technology, was extruded
with oxidized graphene ink by a syringe then it was dried in vacuum freezer to
remove liquid part of the ink. Aerogel’s electrical conductivity was achieved
after the chemical reduction of the material with hydroiodic acid. The scientists also used conductive aerogels
with silver nanoparticles and quantum dots to produce electronic devices.
Marcus Worsley from Lawrence Livermore National
Laboratory, US, comments that applying graphene aerogels to wearable flexible
electronics is a big step for demonstrating their great potential in the
future.
For more information: http://pubs.rsc.org/en/Content/ArticleLanding/2016/CC/C6CC05910D#!divAbstract
http://nanografi.com/blog/new-way-of-deafmute-communication-with-3d-graphene/
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