Table 2.
Comparison of experimentally determined diffusion parameters for water monomers on different substrates, including the activation energy, Ea, the diffusion constant, D0, in Arrhenius pre-exponential form, and the hopping attempt rate, ϒ0.
| Substrate | Adsorbate | Ea (meV) | D0 (m2s−1) | ϒ0 (s−1) | T range (K) | Ref. |
|---|---|---|---|---|---|---|
| Graphene/Ni(111) | H2O | 60 | 1.1 · 10−7 | 4.0 · 1012 | 113 – 130 | [56] |
| Cu(111) | D2O | 75 | 1.8 · 10−8 | 1.8 · 1011 | 23 – 29 | [205] |
| Bi2Te3(111) | H2O | 34 | 1.3 · 10−8 | 1.7 · 1011 | 130 – 160 | [52] |
| NaCl(001)/Ag(111) | D2O | 149 | 1.5 · 10−8 | 1.0 · 1012 | 42 – 52 | [17] |
| Pd(111) | H2O | 126 | – | 1.0 · 1012 | 40 – 55 | [43] |
| h-TiO2(110) | H2O | 460 | – | 4.0 · 1010 | 170 – 210 | [206] |