New Way of Deaf-Mute Communication with 3D Graphene

Image retrieved from: http://blogs.rsc.org/cc/2016/09/01/3d-graphene-adds-dimension-to-deaf%E2%80%93mute-communication/

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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.

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For more information: http://pubs.rsc.org/en/Content/ArticleLanding/2016/CC/C6CC05910D#!divAbstract

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