Abstract
Thin films are ideal building blocks for hyperacute sensors and flexible electronic devices. However, most thin films either lack strength for practical applications or are not compatible with mass-production processes. Here, we reported an orb-web-inspired polymer-carbon nanocomposite-based, strong, lightweight, flexible mesh-type film that was compatible with standard microfabrication and suitable for high-performance acoustic sensing. Taking advantage of the superior mechanical strength of the three-dimensional (3D) heterogeneous nanocomposites constructed by one-dimensional (1D), two-dimensional (2D) carbon-based nanoparticles and polymer matrixes, we fabricated a 564-nm-thick mesh-type film that could be suspended freely both in liquid and air, and folded and stretched repeatedly over a macroscale opening. The sensing application of the mesh-type nanocomposite film was further demonstrated, which could even detect weak airborne sound waves with high fidelity, large dynamic range (>115 dB), and fine frequency resolution (<0.05 Hz) over the audible range. This work provides an approach to manufacturing designable, thin film-based flexible devices across scales with superior performance.
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