Publications by authors named "Diana Al Husseini"

Deep-red fluorescence was implemented in this fully injectable, nonenzymatic glucose biosensor design to allow for better light penetration through the skin, particularly for darker skin tones. In this work, a novel method was developed to synthesize Cy5.5 labeled mannose conjugates (Cy5.

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Chip-scale infrared spectrometers consisting of a microring resonator array (MRA) were developed for volatile organic compound (VOC) detection. The MRA is serially positioned to serve as a wavelength sorting element that enables wavelength demultiplexing. Unlike conventional devices operated by a single microring, our MRA can perform multiwavelength mid-infrared (mid-IR) sensing by routing the resonant wavelength light from a broadband mid-IR source into different sensing channels.

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Article Synopsis
  • Researchers developed mid-infrared sensors using silicon nitride (SiN) waveguides to detect volatile organic compounds (VOCs) like acetone, ethanol, and isoprene.
  • SiN thin films offer a broader transparent range and lower refractive index compared to traditional silicon, enhancing sensitivity through a stronger evanescent wave.
  • This is the first instance of SiN waveguides being utilized for on-chip mid-IR measurements, featuring five-fold greater sensitivity than Si waveguides, making them promising for health, agricultural, and environmental monitoring applications.
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Functionalization of optical waveguides with submicron coatings of zinc peroxide (ZnO) and silica (SiO) nanoparticles (NPs) is reported that enabled selective concentration of acetone vapors in the vicinity of the waveguide, boosting the sensitivity of a mid infrared (MIR) on-chip detector. Controlled thickness was achieved by introducing precise control of the substrate withdrawal speed to the layer-by-layer (LbL) deposition technique.

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