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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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HIGH-SENSITIVITY AND BROADBAND TERAHERTZ FOCAL PLANE ARRAYS BASED ON PLASMONIC PHOTOCONDUCTIVE NANOCAVITIES
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Final Technical Report Title: Ultra-sensitive Detection of Groundwater Contaminants Using Surface Enhanced Raman Scattering (SERS) Sensor with Pinpointed Plasmonic-Active Nanotubes
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Synthesis and Properties of Plasmonic Boron-Hyperdoped Silicon Nanoparticles
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Plasmonic nanoplatforms: From surface-enhanced Raman scattering sensing to biomedical applications
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Ultrafast Early Warning of Heart Attacks through Plasmon‐Enhanced Raman Spectroscopy using Collapsible Nanofingers and Machine Learning
Abstract As the leading cause of death, heart attacks result in millions of deaths annually, with no end in sight. Early intervention is the only strategy for rescuing lives threatened by heart disease. However, the detection time of the fastest heart‐attack detection system is >15 min, which is too long considering the rapid passage of life. In this study, a machine learning (ML)‐driven system with a simple process, low‐cost, short detection time (only 10 s), and high precision is developed. By utilizing a functionalized nanofinger structure, even a trace amount of biomarker leaked before a heart attack can be captured. Additionally, enhanced Raman profiles are constructed for predictive analytics. Five ML models are developed to harness the useful characteristics of each Raman spectrum and provide early warnings of heart attacks with >98% accuracy. Through the strategic combination of nanofingers and ML algorithms, the proposed warning system accurately provides alerts on silent heart‐attack attempts seconds ahead of actual attacks.
Important Considerations in Plasmon-Enhanced Electrochemical Conversion at Voltage-Biased Electrodes
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Plasmon-enhanced sub-Debye-length nanogap photoelectrochemical cells for field-assisted electrolyte-free water splitting
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Building Atomic and Plasmonic Devices via Electron Beams: from Desired Structures to Desired Properties
The evolution of the aberration correction in Scanning Transmission Electron Microscopy (STEM) has enabled multiple advances including high-resolution structural imaging, pm-level position detection of atomic columns, and ~3-5 mV resolution electron energy loss spectroscopy of the chemical and physical functionalities. These developments have further enabled the precise manipulation of the atomic structure of materials, including removal and formation of atomic planes in 3D materials, controlled atomic motion, and even direct atomic assembly of homo- and heteroatomic artificial molecules. Here, we will discuss several recent advances in STEM-EELS automated experiments as applied to quantum and nanoplasmonic systems.
Fe Cations Control the Plasmon Evolution in CuFeS2 Nanocrystals
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