Beilstein J. Nanotechnol.2019,10, 2275–2279, doi:10.3762/bjnano.10.219
approaches to modify a gold surface. However, only few techniques are capable of characterizing the formation of these monolayers on porous substrates. Here, we present a method to in situ monitor the adsorption and desorption of self-assembled monolayers on nanoporous gold by resistometry, using cysteine as
resistometry. From the desorption peak related to the (111) surface of the structure, which is associated with a resistance change of 4.8%, an initial surface coverage of 0.48 monolayers of cysteine could be estimated.
Keywords: L-cysteine; in situ resistometry; nanoporous gold; self-assembled monolayer (SAM
-/desorption of SAMs on nanoporous gold (npAu), based on our experience on in situ resistometry as a highly sensitive diagnosis tool for ad-/desorption processes [9]. The selected SAM material for this study is cysteine, due to its beneficial properties such as the short carbon backbone, the solubility in
PDF
Figure 1:
Relative change in electrical resistance measured in situ during the exposure of npAu in 20 mM cyst...
Beilstein J. Nanotechnol.2016,7, 1197–1201, doi:10.3762/bjnano.7.110
reversible actuation clearly exceeds the values found in the literature, which is most likely due to the unique structure of np-Pd with an extraordinarily high surface-to-volume ratio.
Keywords: dealloying; dilatometry; hydrogen storage; nanoporous palladium; resistometry; Findings
The knowledge about the
platelet. The mid-positioned wire served as working-electrode contact connected to a PGZ-100 potentiostat (Radiometer Analytical), the other wires were connected to a Keithley 2400 Source Meter for four-point resistometry.
For dilatometry a square shaped sample platelet (ca. 5 × 5 mm2) was placed under the
for nanoporous gold, which is caused by alterations in the atomic bindings in superficial atomic layers [19].
In conclusion, resistometry and dilatometry represent two efficient, independent methods to characterize the hydrogen concentration in nanoporous palladium. The volume expansion of nanoporous
PDF
Figure 1:
Cyclic voltammetry of np-Pd with a scan rate of 1 mV/s, recorded between potentials UAg/AgCl of −10...