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Surface chemistry and electrical properties of germanium nanowires


, : Surface chemistry and electrical properties of germanium nanowires. Journal of the American Chemical Society 126(37): 11602-11611

Germanium nanowires (GeNWs) with p- and n-dopants were synthesized by chemical vapor deposition (CVD) and were used to construct complementary field-effect transistors (FETs). Electrical transport and X-ray photoelectron spectroscopy (XPS) data are correlated to glean the effects of Ge surface chemistry to the electrical characteristics of GeNWs. Large hysteresis due to water molecules strongly bound to GeO(2) on GeNWs is revealed. Different oxidation behavior and hysteresis characteristics and opposite band bending due to Fermi level pinning by interface states between Ge and surface oxides are observed for p- and n-type GeNWs. Vacuum annealing above 400 degrees C is used to remove surface oxides and eliminate hysteresis in GeNW FETs. High-kappa dielectric HfO(2) films grown on clean GeNW surfaces by atomic layer deposition (ALD) using an alkylamide precursor is effective in serving as the first layer of surface passivation. Lastly, the depletion length along the radial direction of nanowires is evaluated. The result suggests that surface effects could be dominant over the "bulk" properties of small diameter wires.

US$19.90

PMID: 15366907

DOI: 10.1021/ja047435x


Other references

Tommerup I.C., 1983: Spore dormancy in vesicular arbuscular mycorrhizal fungi. Spores of 4 spp. of vesicular arbuscular mycorrhizal fungi were unable to germinate when first formed. The change in their capacity to germinate was examined by using populations of newly-formed spores with a narrow age range. Percentage germinati...

Martin, Mj, 1980: Television and families. C Kansas State University Cooperative Extension Service: 81 (630)

de Souza, S.Aparecida.Fabris.; Faintuch, J.; Sant'anna, A.Fernando., 2010: Effect of weight loss on aerobic capacity in patients with severe obesity before and after bariatric surgery. Severe obesity has been associated with adverse effects on physical capacity. In a prospective study, the aerobic capacity of severely obese patients was measured in order to observe the physiological response to weight loss from bariatric surgery...

Darnaud, C., 1968: The diabetic at work. Le Diabete: Suppl:19-21

Mo, C.; Milla, P.; Athenstaedt, K.; Ott, R.; Balliano, G.; Daum, G.; Bard, M., 2003: In yeast sterol biosynthesis the 3-keto reductase protein is required for oxidosqualene cyclase activity. In Saccharomyces cerevisiae, the 3-keto reductase (Erg27p) encoded by ERG27 gene is one of the key enzymes involved in the C-4 demethylation of the sterol intermediate, 4,4-dimethylzymosterol. The oxidosqualene cyclase (Erg7p) encoded by the ERG7...

He, F.; Zhang, X.W., 2002: Acoustic characteristics of twin jets. Experiments were conducted to investigate the acoustic characteristics of underexpanded supersonic twin jets in different azimuthal measurement planes. Compared with two independent jets, the twin jets produced additional noise due to the enhanced...

Freeman, H.; Kenefick, D.P.; Rivera, M.R., 1960: A clinical evaluation of marplan in depressed patients. Diseases of the Nervous System 21(3)suppl: 104-106

Gibbons A.B.; Luft S.J.; Swadley W.C., 1979: Section NC-7; Geohegan and Mathis Quarry. Open-File Report - U S

Verma, A.; Wulffhart, Z.; Beardsall, M.; Whaley, B.; Hill, C.; Khaykin, Y., 2008: Spatial and temporal stability of complex fractionated electrograms in patients with persistent atrial fibrillation over longer time periods: relationship to local electrogram cycle length. Atrial fibrillation (AF) ablation guided by complex fractionated electrograms (CFE) has been described, but the spatial and temporal stability of the electrograms (EGMs) has been questioned. The purpose of this study was to prospectively assess th...

Ohlson, M.A.; Cederquist, D.; Donelson, E. 6.; Leverton, R.M.; Lewis, G.K.nsman; Himwich, W.L.amina Armstrong; Reynolds, M.S., 1944: Hemoglobin concentrations, red cell counts and erythrocyte volumes of college women of the North Central States. Studies of Hb concs., erythrocyte counts and cell vol. tests are presented on young ?? from 6 colleges and universities located in the North Central States. The mean Hb conc. was 13.4 g./100 ml. blood with a standard error of 0.017. Mean erythrocy...