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- W2078331411 startingPage "2496" @default.
- W2078331411 abstract "The surface chemistry of pristine, 6-nm silicon nanoparticles has been investigated. The particles were produced in an RF plasma and studied using a tandem differential mobility analysis apparatus, Fourier transform infrared spectroscopy (FTIR), time-of-flight secondary ion mass spectrometry (ToF-SIMS), and transmission electron microscopy. Particles were extracted from the plasma, which operates at ∼20 Torr, into an atmospheric pressure aerosol flow tube, and then through a variable-temperature furnace that could be adjusted between room temperature and 1200 °C. DMA measurements show that freshly generated silicon particles shrink with heating, with particle diameters decreasing by ∼0.25 nm between 350 and 400 °C. FTIR results indicate that freshly generated particles are primarily covered with SiH2 groups and smaller amounts of SiH and SiH3. Spectra recorded as a function of heating temperature indicate that the amount of surface hydrogen, as measured by the intensity of modes associated with SiH, SiH2, and SiH3, decreases with heating. ToF-SIMS measurements also suggest that hydrogen desorbs from the particles surfaces over the same temperature range that the particles shrink." @default.
- W2078331411 created "2016-06-24" @default.
- W2078331411 creator A5023388612 @default.
- W2078331411 creator A5008645929 @default.
- W2078331411 date "2007-02-07" @default.
- W2078331411 modified "2023-10-06" @default.
- W2078331411 title "Surface Chemistry of Aerosolized Silicon Nanoparticles: Evolution and Desorption of Hydrogen from 6-nm Diameter Particles" @default.
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- W2078331411 doi "https://doi.org/10.1021/ja0658970" @default.
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- W2078331411 hasPublicationYear "2007" @default.
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