+ = 1 On unoccupied sites: On occupied sites: Pad + Pmig + Pdes P'mig + P des = 1 Kisliuk Model Pmig + P'mig - OP'des Q2

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1 On Unoccupied Sites On Occupied Sites Pad Pmig Pdes P Mig P Des 1 Kisliuk Model Pmig P Mig Op Des Q2 1 (107.21 KiB) Viewed 55 times

+ = 1 On unoccupied sites: On occupied sites: Pad + Pmig + Pdes P'mig + P des = 1 Kisliuk Model Pmig + P'mig - OP'des Q2: Derive this equation. P Po Pop 1-P P 1- Pirap = 1 -(1 - 0)Pad - (1 - 0)Pdes adsorption desorption desorption s = (1 - 0)Pad Po(Pmig + P'mig)" n=0 1-0 = So (1-0)+OK Pad adsorption migration desorption K = Pad+P des Pad+P des adsorption migration desorption So: initial sticking probability adsorption migration desorption S 1-0 So (1 - 0) + OK Po Precursor on occupied site Pides P. So = Precursor on unoccupied site 2000 0.8 0.6 ASSUMPTIONS 1. Colliding atoms or molecules are different from those consisting of substrate, and they do not adsorb on those already adsorbing on the substrate. 2. Density of precursors on unoccupied sites is the same as that on occupied sites. 1 0.4 0 =1&R #1 Langmuie model K0 -K-0.01 --K-0.1 -:-K-0.5 -- K-1 0.2 0 0 0.2 0.8 0.4 0.6 0 (ML) 岩澤康裕他、「ベーシック表面化学」(化学同人, 2010) 10