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Morphological change during crystallization of thin amorphous solid water films on Ru(0001)
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Image of FIG. 1.
FIG. 1.

(Color) Simultaneous acquisitions of HAS, ITPD, and IRAS at (left) and (right) as a function of time. During the period up to , the temperature increases from to the designated temperature with a heating rate of . The temperature is then held at the designated temperature. [(a) and (b)] HAS results [left axis: He beam intensity of the specular reflection, , on a log scale. Right axis: [ (grey curve); black curve represents the fitting result. Red and green curves show the two components of .)] [(c) and (d)] ITPD results, the desorption rate of from Ru(0001) (grey curve; black curve represents average). [(e) and (f)] IRAS analyzed results (left axis: total weighted absorbance, summation of integrated absorption of the fraction of ASW and that of CI; right axis: converted fraction of ASW to CI phase derived from the linear fit of IRAS result). [(g) and (h)] IRAS results. Each vertical dotted line represents the moment when conversion is achieved in (e) and (f), respectively.

Image of FIG. 2.
FIG. 2.

(Color online) Converted fraction from ASW to CI calculated from the analysis of IRAS spectra. (a) The result at is analyzed using the Avrami-type equation (see text), where the equation with reproduces our result. (b) Results at various temperatures are shown as a function of isothermal annealing time. Solid curves are the calculated results based on the Backus and Bonn model (BB model) (see text).

Image of FIG. 3.
FIG. 3.

Arrhenius plot of the ASW ( ML) crystallization time (100% conversion time) derived from the IRAS analysis (see text).

Image of FIG. 4.
FIG. 4.

(Color online) Schematic diagram of the isothermal crystallization process of ASW ( ML) on Ru(0001) observed by our measurements (see text).


Generic image for table
Table I.

The kinetic parameters of bulk nucleation rate and growth rate [ML/s] derived from the fitting analysis (see text). The desorption rate [ML/s] used in the calculation is estimated from the time variation of the IRAS total absorbance.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Morphological change during crystallization of thin amorphous solid water films on Ru(0001)