Nano-Fiber Can Hear Heart Cells Beat

Nano-Fiber Can Hear Heart Cells Beat

Nano Fiber Feels Forces and Hears Sounds Made by Cells

Engineers at the University of California San Diego have developed a miniature device that’s sensitive enough to feel the forces generated by swimming bacteria and hear the beating of heart muscle cells.

The device is a nano-sized optical fiber that’s about 100 times thinner than a human hair. It can detect forces down to 160 femtonewtons — about ten trillion times smaller than a newton — when placed in a solution containing live Helicobacter pylori bacteria, which are swimming bacteria found in the gut.

US-based engineers have developed a nano-optical fibre that is sensitive enough to hear the beating of heart muscle cells and feel the forces generated by swimming bacteria. The intensity of light reflected in the fibre placed in cell solutions indicates the sound and force strength. Researchers aim to improve the fibre’s “listening” capability to create ultra-sensitive biological stethoscopes.

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