We report experimental and theoretical evidence of the different mechanisms that lead to doping of Si nanowires upon molecular adsorption of two paradigmatic Lewis bases. Pyridine genuinely dopes the nanowires by injecting charge carriers. Ethanol, on the other hand, simply modifies the dielectric screening conditions, allowing the reactivation of preexisting electrically passive impurities, and thus cannot control neither the nature (n- vs p-type) nor the concentration of the carriers.
Molecular doping and gas sensing in Si nanowires: From charge injection to reduced dielectric mismatch / Amato, Giampiero; Cultrera, A; Boarino, Luca; Lamberti, C; Bordiga, S; Mercuri, F; Cartoixa, X; Rurali, R.. - In: JOURNAL OF APPLIED PHYSICS. - ISSN 0021-8979. - 114:20(2013), p. 204302.
Molecular doping and gas sensing in Si nanowires: From charge injection to reduced dielectric mismatch
AMATO, GIAMPIERO;Cultrera A;BOARINO, LUCA;
2013
Abstract
We report experimental and theoretical evidence of the different mechanisms that lead to doping of Si nanowires upon molecular adsorption of two paradigmatic Lewis bases. Pyridine genuinely dopes the nanowires by injecting charge carriers. Ethanol, on the other hand, simply modifies the dielectric screening conditions, allowing the reactivation of preexisting electrically passive impurities, and thus cannot control neither the nature (n- vs p-type) nor the concentration of the carriers.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
