Novel graphene thermoacoustic speakers bend and stretch while retaining acoustic performance
Researchers from the Korea Research Institute of Chemical Technology have demonstrated a new class of shape‑configurable thermoacoustic loudspeakers that defy the traditional tradeoff between film thickness, flexibility, and acoustic output. Instead of relying on vibrating membranes, these devices use vertical graphene microstructures to convert electrical signals into sound through rapid heating and cooling, enabling loud, robust, and stretchable audio elements that can be integrated directly onto curved or deformable surfaces.
Fabrication, morphology, and structural features of patterned VrGO films using dual-laser patterning. (a) Schematic illustration of the dual-laser processing strategy for fabricating patterned VrGO TA loudspeakers and their working mechanism. (b,c) SEM images of CO2 -laser and pulsed-laser-irradiated GO films (scale bar: 500 μm). (d) SEM image showing vertically aligned rGO sheets in the VrGO structure (scale bar: 10 μm). (e) 100% stretched kirigami and (f) 3D-structured VrGO films fabricated via pulsed laser-based patterning. Image from: Advanced Science
A core challenge in thermoacoustic speakers is that high sound pressure levels (SPLs) typically require ultrathin conductive films, which are mechanically fragile, difficult to process at scale, and limited in power handling. Thicker films are more durable and easier to manufacture, but they trap heat within their bulk, suppressing thermoacoustic efficiency and causing SPL to collapse as thickness increases. This thickness–performance tradeoff has restricted most previous flexible TA speakers, such as MXene‑based devices, to tens of nanometers thickness, SPLs below 75 dB, and moderate strains around 50%.
Source: https://www.graphene-info.com/novel-graphene-thermoacoustic-speakers-bend-and-stretch-while-retaining
Anyone can join.
Anyone can contribute.
Anyone can become informed about their world.
"United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.
Before It’s News® is a community of individuals who report on what’s going on around them, from all around the world. Anyone can join. Anyone can contribute. Anyone can become informed about their world. "United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.
LION'S MANE PRODUCT
Try Our Lion’s Mane WHOLE MIND Nootropic Blend 60 Capsules
Mushrooms are having a moment. One fabulous fungus in particular, lion’s mane, may help improve memory, depression and anxiety symptoms. They are also an excellent source of nutrients that show promise as a therapy for dementia, and other neurodegenerative diseases. If you’re living with anxiety or depression, you may be curious about all the therapy options out there — including the natural ones.Our Lion’s Mane WHOLE MIND Nootropic Blend has been formulated to utilize the potency of Lion’s mane but also include the benefits of four other Highly Beneficial Mushrooms. Synergistically, they work together to Build your health through improving cognitive function and immunity regardless of your age. Our Nootropic not only improves your Cognitive Function and Activates your Immune System, but it benefits growth of Essential Gut Flora, further enhancing your Vitality.
Our Formula includes: Lion’s Mane Mushrooms which Increase Brain Power through nerve growth, lessen anxiety, reduce depression, and improve concentration. Its an excellent adaptogen, promotes sleep and improves immunity. Shiitake Mushrooms which Fight cancer cells and infectious disease, boost the immune system, promotes brain function, and serves as a source of B vitamins. Maitake Mushrooms which regulate blood sugar levels of diabetics, reduce hypertension and boosts the immune system. Reishi Mushrooms which Fight inflammation, liver disease, fatigue, tumor growth and cancer. They Improve skin disorders and soothes digestive problems, stomach ulcers and leaky gut syndrome. Chaga Mushrooms which have anti-aging effects, boost immune function, improve stamina and athletic performance, even act as a natural aphrodisiac, fighting diabetes and improving liver function. Try Our Lion’s Mane WHOLE MIND Nootropic Blend 60 Capsules Today. Be 100% Satisfied or Receive a Full Money Back Guarantee. Order Yours Today by Following This Link.
| Visits: | 1,772,416,106 |
| Stories: | 8,573,787 |
Whistler Blowers, Insiders
