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Mushroom-like nanowires stand up for elastronics
摘要： A dense forest of mushroom-like gold nanowires grown on soft, flexible substrates could enable a new generation of wearable or implantable stretchable electronic devices, believe researchers [Wang et al., ACS Nano (2018), DOI: 10.1021/acsnano.8b05019 https://doi.org/10.1021/acsnano.8b05019]. Elastronics – electronic devices that can bend and flex repeatedly without impacting on performance – are ideally suited to on-the-skin monitoring or diagnostic applications.
关键词： elastronics,gold nanowires,stretchable electronics,wearable devices
更新于2025-09-23 15:21:01
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Infrared plasmonics: STEM-EELS characterization of Fabry-P??rot resonance damping in gold nanowires
摘要： Materials possessing strong midinfrared responses are of current interest because of their potential application to long-wavelength metamaterials, photonic devices, molecular detection, and catalysis. Here, we utilize high-energy resolution (80 cm?1, 10 meV) electron-energy-loss spectroscopy (EELS) in a monochromated and aberration-corrected scanning transmission electron microscope (STEM) to resolve multipolar surface plasmon resonances (SPRs), sometimes called Fabry-Pérot (FP) resonances, in gold nanowires with mode energies spanning from ～1000 to 8000 cm?1. STEM-EELS provides access to these mid- to near-IR responses in a single acquisition, avoiding the difficulties inherent in obtaining the same data using near-field optical techniques. The experimentally measured FP resonance energies and linewidths, together with analytical modeling and full-wave numerical electrodynamics simulations, provide a comprehensive picture of the radiative and intrinsic contributions to the total damping rates. We find some FP modes with dephasing times >60 fs, which is almost twice the longest previously reported plasmon dephasing time for individual Au nanoparticles in the infrared. The long dephasing times and the broad tunability of the FP resonance energies throughout the infrared region suggest additional opportunities for harnessing infrared plasmonic energy before dephasing occurs.
关键词： gold nanowires,plasmon dephasing times,Fabry-Pérot resonance,infrared plasmonics,STEM-EELS
更新于2025-09-23 15:19:57
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A Wearable Second Skin-Like Multifunctional Supercapacitor with Vertical Gold Nanowires and Electrochromic Polyaniline
摘要： A Wearable Second Skin-Like Multifunctional Supercapacitor with Vertical Gold Nanowires and Electrochromic Polyaniline. An ideal wearable/implantable bio-diagnostics can be powered by second skin-like energy devices in that they offer advantages such as conformal attachment/integration, lightweightness, and moduli-matching properties. Past several years have witnessed encouraging progresses in soft stretchable supercapacitors by various material combinations and design strategies; however, it remains nontrivial to achieve highly flexible high-performance supercapacitors in a skin-thin layout yet with multifunctionality. Here, such a second skin-like electrochromic supercapacitor is demonstrated using self-assembled vertical gold nanowires (v-AuNWs) and electrodeposited polyaniline (PANI). The v-AuNW film is highly conductive yet offers great flexibility and deformability, while PANI plays a dual role in enhancing capacitance and as charge/discharge-level indicator. The assembled supercapacitors offer superior skin-conformability and could achieve an areal specific capacitance of 11.76 mF cm?2 (scan rate of 10 mV s?1) with high durability. A second skin-like wearable tattoo energy device can be designed with negligible performance deterioration under multiple hand movements and skin deformations.
关键词： vertical gold nanowires,skin-conformable,multifunctional,electrochromic
更新于2025-09-10 09:29:36