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Authors
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Chae, S.; Choi, W.; Lee, S.-H.; Besford, Q. A.; Fery, A.
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Title
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Tunneling barrier-integrated gold nanofilms for negative strain gauging with near-zero energy consumption
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Date
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24.02.2025
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Number
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0
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Abstract
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Wireless strain sensors with minimal power needs are essential for long-term monitoring in energy-limited environments. We present a soft tunneling barrier-integrated gold thin film for negative strain sensing with near-zero energy consumption. The device features a strain-induced transition from an insulating to a metallic state, increasing conductivity by 9 orders of magnitude under a controlled strain. It consists of Au-PDMS-Au nanofilm layers, where the Au structures are near the percolation threshold and the PDMS layer acts as a tunneling barrier. Under strain, thinning due to the Poisson effect lowers the barrier’s potential height, enabling electron tunneling and forming an electrical path. With a standby power consumption of ∼10–5 mW over 106 times lower than conventional sensors (∼12.5 mW), this device is ideal for real-time, long-term stationary structural monitoring in multiple locations.
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Publisher
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American Chemical Society
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Wikidata
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Citation
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Nano Letters 25 (2025) 3556-3564
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DOI
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https://doi.org/10.1021/acs.nanolett.4c06365
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Tags
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