Ilmuwan pecahkan misteri karet berpenguat berusia 100 tahun

Rabu, 13 Mei 2026

Dilaporkan oleh AI

Para peneliti di University of South Florida telah mengidentifikasi mekanisme yang membuat partikel karbon hitam memperkuat karet, menyelesaikan teka-teki ilmiah yang telah berlangsung hampir satu abad. Simulasi komputer mereka mengungkapkan bagaimana material tersebut menahan peregangan dengan cara melawan dirinya sendiri secara efektif.

Tim yang dipimpin oleh profesor teknik David Simmons tersebut melakukan 1.500 simulasi dinamika molekuler yang setara dengan total 15 tahun waktu komputasi. Bekerja sama dengan cendekiawan pascadoktoral Pierre Kawak dan mahasiswa doktoral Harshad Bhapkar, mereka menunjukkan bahwa partikel karbon hitam membatasi seberapa banyak karet menipis saat diregangkan. Hal ini memaksa material untuk berekspansi volumenya, sehingga secara signifikan meningkatkan kekakuan dan kekuatannya.

Researchers discover contactless magnetic friction

Minggu, 22 Maret 2026 Dilaporkan oleh AI Gambar dihasilkan oleh AI

Scientists at the University of Konstanz have identified a new type of sliding friction that occurs without physical contact, driven by magnetic interactions. This phenomenon breaks Amontons' law, a 300-year-old physics principle, by showing friction peaks at certain distances rather than increasing steadily with load. The findings appear in Nature Materials.

Scientists find simple liquids fracture like solids under stress

Researchers at Drexel University have discovered that certain viscous liquids can snap apart like solids when stretched with sufficient force. The finding, detailed in a study published in Physical Review Letters, challenges traditional views of fluid dynamics by linking the behavior to viscosity rather than elasticity. This phenomenon was observed in simple liquids such as tar-like hydrocarbons and styrene oligomer.

Scientists stabilize carbene in water, confirming vitamin B1 theory

Sabtu, 11 April 2026 Dilaporkan oleh AI

Chemists at the University of California, Riverside have stabilized a highly reactive carbene molecule in water, proving a 67-year-old hypothesis about vitamin B1's role in the body. The breakthrough, detailed in Science Advances, resolves a long-standing biochemical puzzle. It also suggests potential for greener chemical manufacturing.

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Physicists solve mystery of charge separation in volcanic lightning

Physicists have identified the role of carbon-containing molecules in determining charge polarity during particle collisions in volcanic ash clouds. This discovery explains the triboelectric effect that leads to volcanic lightning. The finding comes from experiments with silicon dioxide particles.

NYU scientists use light to control crystal formation

Senin, 02 Maret 2026 Dilaporkan oleh AI

Researchers at New York University have developed a method to direct the assembly of microscopic particles into crystals using light. This technique, detailed in the journal Chem, allows for real-time control over crystal growth and dissolution. The approach could enable new responsive materials for applications in optics and photonics.

13 Mei 2026 02.51