The heat of adsorption of Pb on an MgO(100) thin film at 190 K is
measured calorimetrically as a function of coverage using a removable
pyroelectric polymer ribbon as the heat-detecting element. This is
the first demonstration that this versatile method of heat detection
can be used for single-crystal adsorption calorimetry at cryogenic
conditions. The results are compared to earlier measurements at room
temperature. Similar to room temperature, the initial heat of adsorption
at 190 K is 100 kJ/mol. However, the heat of adsorption grows much
more slowly with coverage toward the bulk heat of sublimation, consistent
with a larger Pb island density (and smaller, flatter islands) at
low temperature. Measurement of the sticking probability for Pb onto
the MgO(100) thin film at temperatures down to 167 K are also consistent
with this.
%0 Journal Article
%1 Starr2001
%A Starr, D. E.
%A Campbell, C. T.
%D 2001
%J J. Phys. Chem. B
%K ; MgO; PVDF; Pb lead low microcalorimetry; science, surface temperature,
%P 3776�3782
%R 10.1021/jp003411a
%T Low-Temperature Adsorption Microcalorimetry: Pb on MgO(100)
%V 105
%X The heat of adsorption of Pb on an MgO(100) thin film at 190 K is
measured calorimetrically as a function of coverage using a removable
pyroelectric polymer ribbon as the heat-detecting element. This is
the first demonstration that this versatile method of heat detection
can be used for single-crystal adsorption calorimetry at cryogenic
conditions. The results are compared to earlier measurements at room
temperature. Similar to room temperature, the initial heat of adsorption
at 190 K is 100 kJ/mol. However, the heat of adsorption grows much
more slowly with coverage toward the bulk heat of sublimation, consistent
with a larger Pb island density (and smaller, flatter islands) at
low temperature. Measurement of the sticking probability for Pb onto
the MgO(100) thin film at temperatures down to 167 K are also consistent
with this.
@article{Starr2001,
abstract = {The heat of adsorption of Pb on an MgO(100) thin film at 190 K is
measured calorimetrically as a function of coverage using a removable
pyroelectric polymer ribbon as the heat-detecting element. This is
the first demonstration that this versatile method of heat detection
can be used for single-crystal adsorption calorimetry at cryogenic
conditions. The results are compared to earlier measurements at room
temperature. Similar to room temperature, the initial heat of adsorption
at 190 K is 100 kJ/mol. However, the heat of adsorption grows much
more slowly with coverage toward the bulk heat of sublimation, consistent
with a larger Pb island density (and smaller, flatter islands) at
low temperature. Measurement of the sticking probability for Pb onto
the MgO(100) thin film at temperatures down to 167 K are also consistent
with this.},
added-at = {2009-10-30T10:04:05.000+0100},
author = {Starr, D. E. and Campbell, C. T.},
biburl = {https://www.bibsonomy.org/bibtex/2249994ce286380b35c105bfed90ea9ff/jfischer},
doi = {10.1021/jp003411a},
interhash = {15af23d425867f5b7d3b96e9cbaca27b},
intrahash = {249994ce286380b35c105bfed90ea9ff},
journal = {J. Phys. Chem. B},
keywords = {; MgO; PVDF; Pb lead low microcalorimetry; science, surface temperature,},
pages = {3776�3782},
timestamp = {2009-10-30T10:04:19.000+0100},
title = {Low-Temperature Adsorption Microcalorimetry: Pb on MgO(100)},
volume = 105,
year = 2001
}