Two-dimensional molecular networks at the solid/liquid interface and the role of alkyl chains in their building blocks

• Suyi Liu,
• Yasuo Norikane and
• Yoshihiro Kikkawa

Beilstein J. Nanotechnol. 2023, 14, 872–892, doi:10.3762/bjnano.14.72

• CH2 unit. The absolute value is almost identical to the desorption energy obtained by temperature-programmed desorption measurements (1.90 kcal/mol per CH2 unit) [56]. This result suggests that the longer the alkyl chain, the larger the proportion of stabilization energy caused by the alkyl chains in

The rational design of a Au(I) precursor for focused electron beam induced deposition

• Ali Marashdeh,
• Thiadrik Tiesma,
• Niels J. C. van Velzen,
• Sjoerd Harder,
• Remco W. A. Havenith,
• Jeff T. M. De Hosson and
• Willem F. van Dorp

Beilstein J. Nanotechnol. 2017, 8, 2753–2765, doi:10.3762/bjnano.8.274

• unit form weakly bound dimers with Au–Au interactions. In contrast, two molecules in the unit cell show Au–Au distances above 4.0 Å and should basically be considered monomeric. These monomerically bound MeAuPMe3 molecules have a lower desorption energy, allowing them to leave to the gas phase. Once

Modelling focused electron beam induced deposition beyond Langmuir adsorption

• Dédalo Sanz-Hernández and
• Amalio Fernández-Pacheco

Beilstein J. Nanotechnol. 2017, 8, 2151–2161, doi:10.3762/bjnano.8.214

• /m2s) the density of available sites, ν0 (1/s) is the thermal desorption attempt frequency, E (J) is desorption energy, T (K) is the temperature, kB is Boltzmann’s constant, σ (m2) is the molecule dissociation cross section and J (1/m2s) is the electron flux density. No diffusion is considered, which

• with two desorption energies (E1 and E2), making it possible to describe two types of desorption processes. E1 is the interaction energy of the first monolayer with the substrate, whereas E2 is the desorption energy for all subsequent monolayers, representing the interaction between molecules adsorbed

• on top of each other. This approach is the same followed by the Brunauer, Emmet, Teller (BET) adsorption model [43], with a different desorption energy value for the first monolayer than for the rest, and E2 usually taken as the vaporization enthalpy. E2 is therefore the standard desorption energy

Continuum models of focused electron beam induced processing

• Milos Toth,
• Charlene Lobo,
• Vinzenz Friedli,
• Aleksandra Szkudlarek and
• Ivo Utke

Beilstein J. Nanotechnol. 2015, 6, 1518–1540, doi:10.3762/bjnano.6.157

• chemisorption. We also note that most FEBIP models assume that sa is independent of temperature. The thermal desorption rate ka of the physisorbed species ‘a’ is given by: where τa is the adsorption time (i.e., adsorbate residence time), κa is the desorption attempt frequency, Ea the desorption energy, (i.e

The role of electron-stimulated desorption in focused electron beam induced deposition

• Willem F. van Dorp,
• Thomas W. Hansen,
• Jakob B. Wagner and
• Jeff T. M. De Hosson

Beilstein J. Nanotechnol. 2013, 4, 474–480, doi:10.3762/bjnano.4.56

• desorption. Keywords: desorption energy; focused electron beam induced processing; scanning transmission electron microscopy; temperature dependence; tungsten hexacarbonyl; Introduction When the electron beam in an electron microscope is focused on a sample in the presence of a precursor gas, it can be

• gas flux at the sample, etc. If we want to understand and model FEBIP, we need to understand how these parameters contribute to the final product. In this paper we determined the activation energy for desorption, Edes, from a FEBIP experiment. The desorption energy plays a significant role in FEBIP

• an Arrhenius plot. Christy measured Edes in a FEBIP experiment for a siloxane (tetramethyl tetraphenyl trisiloxane, DC-704 pump oil) and found that the value found from the FEBIP experiment underestimates the desorption energy by a factor of two to three compared to reference values [14][15]. Li et