A new microcalorimeter for measuring heats of adsorption on clean
single-crystal surfaces is described, and its operational characteristics
are presented. The principle is similar to that pioneered by David
King's group: A pulse of gas from a molecular beam adsorbs on an
ultrathin single crystal's surface, causing a measurable transient
heat input and temperature rise. Our novel heat detector is a 9 mu
m thick pyroelectric polymer ribbon, which is mechanically driven
to make a gentle mechanical/thermal contact to the back of the single-crystal
sample during measurements. Advantages include use of thicker samples
(1 mu m), sample preparation at very high temperatures, and potential
measurements at cryogenic temperatures. A novel chopped molecular
beam of metal vapor and a method of correcting for absorbed radiation
from the hot effusion cell are also described. This system is applied
to study the heats of adsorption of metals on clean, well-defined
and single-crystalline surfaces as a detailed function of coverage,
from which metal/substrate adhesion energies can also be extracted.
We obtain pulse-to-pulse standard deviations of <2% in the heat of
adsorption for pulses containing <0.03 ML of Cu and Pb, and absolute
accuracy to within a few percent.
%0 Journal Article
%1 Stuckless1998
%A Stuckless, J.
%A Frei, N.A.
%A Campbell, C.T.
%D 1998
%J Rev. Sci. Instrum.
%K COLLISIONS; COPPER; ETHYLENE; FILMS; GOLD; MICROCALORIMETRY; OXYGEN; PARTICLES PROBABILITIES; STICKING SURFACE;
%N 6
%P 2427-2438
%R 10.1063/1.1148971
%T A novel single-crystal adsorption calorimeter and additions for determining
metal adsorption and adhesion energies
%U http://tinyurl.sfx.mpg.de/pwo6
%V 69
%X A new microcalorimeter for measuring heats of adsorption on clean
single-crystal surfaces is described, and its operational characteristics
are presented. The principle is similar to that pioneered by David
King's group: A pulse of gas from a molecular beam adsorbs on an
ultrathin single crystal's surface, causing a measurable transient
heat input and temperature rise. Our novel heat detector is a 9 mu
m thick pyroelectric polymer ribbon, which is mechanically driven
to make a gentle mechanical/thermal contact to the back of the single-crystal
sample during measurements. Advantages include use of thicker samples
(1 mu m), sample preparation at very high temperatures, and potential
measurements at cryogenic temperatures. A novel chopped molecular
beam of metal vapor and a method of correcting for absorbed radiation
from the hot effusion cell are also described. This system is applied
to study the heats of adsorption of metals on clean, well-defined
and single-crystalline surfaces as a detailed function of coverage,
from which metal/substrate adhesion energies can also be extracted.
We obtain pulse-to-pulse standard deviations of <2% in the heat of
adsorption for pulses containing <0.03 ML of Cu and Pb, and absolute
accuracy to within a few percent.
@article{Stuckless1998,
abstract = {A new microcalorimeter for measuring heats of adsorption on clean
single-crystal surfaces is described, and its operational characteristics
are presented. The principle is similar to that pioneered by David
King's group: A pulse of gas from a molecular beam adsorbs on an
ultrathin single crystal's surface, causing a measurable transient
heat input and temperature rise. Our novel heat detector is a 9 mu
m thick pyroelectric polymer ribbon, which is mechanically driven
to make a gentle mechanical/thermal contact to the back of the single-crystal
sample during measurements. Advantages include use of thicker samples
(1 mu m), sample preparation at very high temperatures, and potential
measurements at cryogenic temperatures. A novel chopped molecular
beam of metal vapor and a method of correcting for absorbed radiation
from the hot effusion cell are also described. This system is applied
to study the heats of adsorption of metals on clean, well-defined
and single-crystalline surfaces as a detailed function of coverage,
from which metal/substrate adhesion energies can also be extracted.
We obtain pulse-to-pulse standard deviations of <2% in the heat of
adsorption for pulses containing <0.03 ML of Cu and Pb, and absolute
accuracy to within a few percent.},
added-at = {2009-10-30T10:04:05.000+0100},
author = {Stuckless, J. and Frei, N.A. and Campbell, C.T.},
biburl = {https://www.bibsonomy.org/bibtex/2b09cc4b2c7328b69eefa6382e037440a/jfischer},
doi = {10.1063/1.1148971},
groups = {public},
interhash = {41eaaaa79ba52d19b46d11dd6f230ae5},
intrahash = {b09cc4b2c7328b69eefa6382e037440a},
issn = {0034-6748},
journal = {Rev. Sci. Instrum.},
keywords = {COLLISIONS; COPPER; ETHYLENE; FILMS; GOLD; MICROCALORIMETRY; OXYGEN; PARTICLES PROBABILITIES; STICKING SURFACE;},
number = 6,
pages = {2427-2438},
timestamp = {2009-10-30T10:04:20.000+0100},
title = {A novel single-crystal adsorption calorimeter and additions for determining
metal adsorption and adhesion energies},
url = {http://tinyurl.sfx.mpg.de/pwo6},
volume = 69,
year = 1998
}