#Ferroelectric

2025-08-13

:blobcatscience: Eco-friendly Plastic offers flexible Electronic Properties without 'Forever Chemicals'.

Researchers at Case Western Reserve University have developed an environmentally safer type of plastic that can be used for wearable electronics, sensors and other electrical applications. The material, a so-called ferroelectric polymer….

dx.doi.org/10.1126/science.ads

#ferroelectric #eco #friendly #electronic #plastic #chemistry #science #engineer #media #tech #news

….is made without fluorine, considered a "forever" chemical that hurts the environment because compounds made with it don't break down quickly or at all.

Polymers are large molecules comprised of long chains of smaller molecular units that can be man-made such as plastics or natural like in a person's hair or DNA. By changing a polymer's molecular structure and length, it can vary its strength, flexibility, heat-resistance and ability to be recycled.

Ferroelectricity refers to certain materials with what is known as "spontaneous polarization" that can be reversed by applying an electric field [like an on-off switch]. Ferroelectric materials allow for the development of smaller, more efficient electronic devices, reducing our reliance on traditional energy sources.

The new material, is both flexible and has what is known as tunable electronic properties, which means they can be switched on and off. They have wide applications in infrared detectors and sensors in wearable electronics, for which the materials need to be soft, pliable and elastic to be compatible with the human body. Conventional ceramic ferroelectric materials are rigid and brittle.

👾Polymers have the advantage of being flexible and lightweight, but the dominant ferroelectric polymer [poly vinylidene fluoride or PVDF], doesn't naturally degrade in the environment, making it a "forever chemical." The new material is made without fluorine.👾[ImageSource: Science (2025) DOI: 10.1126/science.ads4702]

PLM images of the powder FE-2SO2P sample during a heating and cooling cycle.

Although the researchers are still working to improve the material's electric and elastic properties, the potential is vast for its flexibility of electronic uses and eco-friendly structure.

"How this material generates its electric properties is also fundamentally new," said lead researcher Lei Zhu, a professor of macromolecular science and engineering at the Case School of Engineering. "Unlike current ferroelectric materials, it doesn't have to crystallize to lock in the polarity that gives it electrical properties."

👾Ferroelectric polymers also have applications in sensors for ultrasound diagnostic tools because they are acoustically compatible with biological tissues. They are also potentially useful in augmented and virtual reality [AR and VR] goggles.👾

"We're still in the development stage of synthesizing small quantities and investigating the properties," Zhu said. "But we're excited about the potential to replace environmentally harmful plastics in sensors and detectors."
2024-05-20

Ich weiß nicht, ob 8 KB #Ferroelectric #RAM so hilfreich sind wenn die Firmware in einem klassischen NOR-Flash liegt und man über ein #VT100-Terminal drauf zugreifen muss, weil man in 8 KB nicht mal ansatzweise ein modernes Dateisystem untergebracht bekommt... immerhin VT100 wird's in 200 Jahren vermutlich noch geben, aber USB-A? 🤔

"This USB flash drive can only store 8KB of data, but will last you 200 years"
tomshardware.com/pc-components
machdyne.com/product/blaustahl

#FRAM #Machdyne #Blaustahl

Technische Universität Münchentu_muenchen@wisskomm.social
2023-10-27

Hussam Amrouch developed an #energysaving #AIchip using #ferroelectric field effect transistors. It stores and processes data, making the chips twice as powerful as previous models: go.tum.de/420045

#DeepLearning #InMemoryComputing

📷A.Heddergott

2023-10-20
Scientific Frontlinesflorg
2023-03-08

One month after announcing a at the thinness required for modern computing components, a team at the University of Michigan has demonstrated a reconfigurable using that material.

sflorg.com/2023/03/phy03082301

2021-08-15

Making Ferroelectric Solar Cells Better

Researchers claim that using several very thin layers of ferroelectric crystals can lead to significantly better ferroelectric solar cell efficiency. But don't pull the panels off your roof yet. Conventional cells are still much more efficient than ferroelectric devices -- at least, for now.

Unlike conventional silicon-based solar cells, ferroelectric cells don't depend on a PN junction and -- in theory -- can be cheaper and easier to produce. However, they typically don't absorb as much sunlight as other materials.

Barium titanate alone exhibits some electric current when exposed to sunlight, but it isn't nearly as efficient as modern silicon solar cells. However, when the researchers produced a 200 nanometer-thick film "sandwich" made of barium titanate in between layers of strontium titanate and calcium titanate, the output current went up by a large factor. The resulting cells are still not up to par with commercial silicon cells, but they are a lot closer.

The work was done at Martin Luther University Halle-Wittenberg, a German institution. If you do a search, they seem to do a lot with ferroelectric materials like barium titanate.

If you want to roll your own panels, this material might be a bit hard to recreate. You might find some inspiration looking at other thin-film cells, though.

#science #solarhacks #bariumtitantate #ferroelectric #solarcell

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