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- W2019965251 abstract "We demonstrate anomalous gaseous field ionization and field desorption on branching intrinsic silicon nanowiresgrown by a two-step VLS technique. Field ionization and desorption I-V curves of argon, nitrogen, helium, andammonia, were recorded individually within a wide pressure range (10 -7 to 10 Torr). Field ionization initiated at subvolt was followed by field desorption at about 7 - 38 V (applied field of ~ 7×10 2 to 3.8×10 3 V/cm). Such voltagesare three orders of magnitude smaller than the applied voltages required to generate field ionization on sharpmetallic tips having the same tip curvature. The measured I-V curves were pressure dependent. Low voltage filedionization and desorption phenomena were attributed to the combination effects of geometrical field enhancementon the apex of nanoscale silicon branches, field penetration, increased tunneling critical distance, band gap wideningdue to quantum confinement, and the surface states formed by the catalyst. The results presented herein suggest thatgold terminated branching silicon nanowires could be strong candidates in building low power gas ionizationsensors useful in highly selective detection of gases with low adsorption energies." @default.
- W2019965251 created "2016-06-24" @default.
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- W2019965251 date "2010-04-23" @default.
- W2019965251 modified "2023-09-23" @default.
- W2019965251 title "Enhanced field ionization/desorption on branched silicon nanowires: applications in gas ionization detection" @default.
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- W2019965251 doi "https://doi.org/10.1117/12.850281" @default.
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