Fragmentation of metal(II) bis(acetylacetonate) complexes induced by slow electrons

• Janina Kopyra and
• Hassan Abdoul-Carime

Beilstein J. Nanotechnol. 2023, 14, 980–987, doi:10.3762/bjnano.14.81

• phase; metal(II) bis(acetylacetonate); negative ions; organometallic complexes; Introduction Nowadays, organometallic compounds are used in many applications. They receive great interest in the field of nanoscale technologies [1][2][3]. For example, in nanoscale design processes, the combination of an

• collision experiments. Negative ions that are produced in the reaction area after the electron–molecule interaction are extracted from the collision area by a small draw-out field (ca. 0.5 V·cm−1), then analyzed by the QMA and finally detected using a single-pulse counting technique. The electron energy

Selected properties of Al_xZn_yO thin films prepared by reactive pulsed magnetron sputtering using a two-element Zn/Al target

• Witold Posadowski,
• Artur Wiatrowski,
• Jarosław Domaradzki and
• Michał Mazur

Beilstein J. Nanotechnol. 2022, 13, 344–354, doi:10.3762/bjnano.13.29

• outside the external pole piece of the magnetron. In such a configuration, substrates were placed in the region where both electrons emitted from the target and the negative ions of oxygen were not present. Summarizing the review of literature resources, it can be pointed out that regardless of the type

Low-energy electron interaction and focused electron beam-induced deposition of molybdenum hexacarbonyl (Mo(CO)₆)

• Po-Yuan Shih,
• Maicol Cipriani,
• Christian Felix Hermanns,
• Jens Oster,
• Klaus Edinger,
• Armin Gölzhäuser and
• Oddur Ingólfsson

Beilstein J. Nanotechnol. 2022, 13, 182–191, doi:10.3762/bjnano.13.13

• experiments were reported in the mid-1970s by Winters et al. [19], where the peak positions of negative ions formed through sequential CO loss from one up to four carbonyl groups were reported. Pignataro et al. [20] also published the energy dependence of the same fragment formation from about 0 eV up to

• [38], thermochemical thresholds for the formation of negative ions through DEA were calculated using ORCA [39]. Geometry optimizations and single-point energy calculations were performed at the PBE0 (hybrid GGA functional) [40][41] PBE0/ma-def2-TZV [42][43] level of theory. The Def2 effective core

• spectrometer (QMS). Both positive and negative ions resulting from the electron–molecule interaction are analyzed and detected using the quadrupole mass spectrometer. The flow of the molecular beam can be controlled with a leak valve. The TEM is heated to 120 °C with two halogen lamps in order to avoid

Effects of surface charge and boundary slip on time-periodic pressure-driven flow and electrokinetic energy conversion in a nanotube

• Mandula Buren,
• Yongjun Jian,
• Yingchun Zhao,
• Long Chang and
• Quansheng Liu

Beilstein J. Nanotechnol. 2019, 10, 1628–1635, doi:10.3762/bjnano.10.158

• equation where ρe is the volumetric net charge density. When the number concentrations of the positive and negative ions in symmetric electrolyte in a nanochannel [17] obey the Boltzmann distribution, the volumetric net charge density ρe can be obtained through the relationship where n0 is the bulk ionic

Effect of annealing treatments on CeO₂ grown on TiN and Si substrates by atomic layer deposition

• Silvia Vangelista,
• Rossella Piagge,
• Satu Ek and
• Alessio Lamperti

Beilstein J. Nanotechnol. 2018, 9, 890–899, doi:10.3762/bjnano.9.83

• beam (25 keV, 2.6 pA) for analysis over a 50 μm × 50 μm area centered on the sputtered crater and therein collecting secondary negative ions [27]. The recorded intensities of the secondary ions were normalized to the intensity of 30Si in bulk Si. The chemical state of the annealed CeO2 films [28] was

Electron interactions with the heteronuclear carbonyl precursor H₂FeRu₃(CO)₁₃ and comparison with HFeCo₃(CO)₁₂: from fundamental gas phase and surface science studies to focused electron beam induced deposition

• Ragesh Kumar T P,
• Paul Weirich,
• Lukas Hrachowina,
• Marc Hanefeld,
• Ragnar Bjornsson,
• Helgi Rafn Hrodmarsson,
• Sven Barth,
• D. Howard Fairbrother,
• Michael Huth and
• Oddur Ingólfsson

Beilstein J. Nanotechnol. 2018, 9, 555–579, doi:10.3762/bjnano.9.53

• the HOMO/LUMO gap of this molecule supporting electron attachment and the formation of long lived, transient negative ions at high energies through multiple electron excitations associated with the attachment process, i.e., the formation of "multi-particle multi-hole resonances". This is enabled

Electron interaction with copper(II) carboxylate compounds

• Michal Lacko,
• Peter Papp,
• Iwona B. Szymańska,
• Edward Szłyk and
• Štefan Matejčík

Beilstein J. Nanotechnol. 2018, 9, 384–398, doi:10.3762/bjnano.9.38

• used to identify the fragmentation pattern of the coordination compounds produced in crossed electron – molecular beam experiments and to measure the dependence of ion yields of positive and negative ions on the electron energy. The dissociation pattern of positive ions contains a sequential loss of

• the evaporation of whole complex molecules. A significant production of Cu+ ion was observed only for [Cu2(µ-O2CC2F5)4], a weak yield was detected for [Cu2(EtNH2)2(µ-O2CC2F5)4] as well. The dissociative electron attachment processes leading to formation of negative ions are similar for all

• states have been obtained from their maxima. The first electronic transition represents the value of the ionization energy. For both Cu alkylamine complexes the ionization energy was thus estimated to 9.3 eV. Negative ions Mass spectra resulting from electron attachment to all four measured compounds are

Interactions of low-energy electrons with the FEBID precursor chromium hexacarbonyl (Cr(CO)₆)

• Jusuf M. Khreis,
• João Ameixa,
• Filipe Ferreira da Silva and
• Stephan Denifl

Beilstein J. Nanotechnol. 2017, 8, 2583–2590, doi:10.3762/bjnano.8.258

• using the SCF-Xα-MSW method [19]. Negative ions were previously reported for a series of pentacarbonyl metals of group VI in the periodic table including Fe(CO)5, showing dissociation by capture of LEE with an energy close to 0 eV [20]. Electron ionization of W(CO)6 clusters was also recently

• electron energy is higher than the ionization threshold of the molecule, electron ionization and dissociation is energetically possible. The formation of both positive and negative ions, from the molecular ion as well as from intermediate ions formed, may also occur in a slow reaction extending to the

• microsecond-timescale (metastable decay). Results and Discussion Dissociative electron attachment Figure 1 shows the ion yield curves of the negative ions formed upon electron attachment. When the incoming electron attaches to the Cr(CO)6 molecule, the transient negative ion is formed, Cr(CO)6#−. The excess

Dissociative electron attachment to coordination complexes of chromium: chromium(0) hexacarbonyl and benzene-chromium(0) tricarbonyl

• Janina Kopyra,
• Paulina Maciejewska and
• Jelena Maljković

Beilstein J. Nanotechnol. 2017, 8, 2257–2263, doi:10.3762/bjnano.8.225

• electrons and accordingly are diamagnetic. For such compounds, it has been postulated that DEA leads exclusively to the formation of fragment negative ions [26], without formation of parent anions, since the captured electron has to occupy an antibonding molecular orbital. In accordance with the predictions

• mounted at one of the flanges. The generated negative ions were extracted from the reaction area by a small electric field towards the QMA entrance and detected by a single pulse counting technique. The electron energy scale was calibrated by measuring the signal of SF6−, exhibiting an intense resonance

• transient negative ions (TNIs) and their subsequent decay by dissociation. In particular, by selecting homo- and heteroleptic complexes, namely Cr(CO)6 and (η6-C6H6)Cr(CO)3, we have studied the influence of the substitution of three CO units by the hexahapto C6H6 unit on electron-induced fragmentation. In

Advances and challenges in the field of plasma polymer nanoparticles

• Andrei Choukourov,
• Pavel Pleskunov,
• Daniil Nikitin,
• Valerii Titov,
• Artem Shelemin,
• Mykhailo Vaidulych,
• Anna Kuzminova,
• Pavel Solař,
• Jan Hanuš,
• Jaroslav Kousal,
• Ondřej Kylián,
• Danka Slavínská and
• Hynek Biederman

Beilstein J. Nanotechnol. 2017, 8, 2002–2014, doi:10.3762/bjnano.8.200

• It has been recognized that NPs grow via a three-step process involving nucleation, coagulation and growth by accretion. The nucleation stage is often considered to be governed by negative ions [19][56][57][58][59], leading to the formation of nanometer-sized nuclei. These embryonic clusters may be

Synthesis and applications of carbon nanomaterials for energy generation and storage

• Marco Notarianni,
• Jinzhang Liu,
• Kristy Vernon and
• Nunzio Motta

Beilstein J. Nanotechnol. 2016, 7, 149–196, doi:10.3762/bjnano.7.17

The role of low-energy electrons in focused electron beam induced deposition: four case studies of representative precursors

• Rachel M. Thorman,
• Ragesh Kumar T. P.,
• D. Howard Fairbrother and
• Oddur Ingólfsson

Beilstein J. Nanotechnol. 2015, 6, 1904–1926, doi:10.3762/bjnano.6.194

• [15]) can only produce ionic fragments via DEA (DD usually sets in at higher energies). Hence, negative ions collected from electron/molecule interactions at such low incident electron energies are DEA products. Figure 7 shows the negative ion yields from DEA to MeCpPtMe3 in the incident electron

The study of surface wetting, nanobubbles and boundary slip with an applied voltage: A review

• Yunlu Pan,
• Bharat Bhushan and
• Xuezeng Zhao

Beilstein J. Nanotechnol. 2014, 5, 1042–1065, doi:10.3762/bjnano.5.117

• active pharmaceutical ingredients [79]. To understand the influence of the applied voltage on the nanobubbles, a pretreated PS surface was used to study the relationship between the nanobubbles and the surface charge density. The PS surface was treated by an antistatic gun first. Negative ions were

• . It can be an explanation that the charged nanobubbles were pulled by the electric filed provided by the applied voltage. By applying negative ions on the surface, in DI water, the surface charge density increased. In the meantime, the average diameter of the nanobubbles decreased and total number of

Double layer effects in a model of proton discharge on charged electrodes

• Johannes Wiebe and
• Eckhard Spohr

Beilstein J. Nanotechnol. 2014, 5, 973–982, doi:10.3762/bjnano.5.111

• the transferred proton. With this procedure, the curve must approach a constant value corresponding to the average adsorption distance at infinitely long times. The Na+ ion deposited initially on the negatively charged surface did never desorb from the electrode. In the simulations with negative ions

Characterization and properties of micro- and nanowires of controlled size, composition, and geometry fabricated by electrodeposition and ion-track technology

• Maria Eugenia Toimil-Molares

Beilstein J. Nanotechnol. 2012, 3, 860–883, doi:10.3762/bjnano.3.97

• other half-cell contains either water or an acidic stopping medium that neutralizes the etchant as soon as the pore opens. In both cases, further etching is extensively slowed down or entirely stopped (Figure 4c). In addition, by immersing the positive anode in the etching solution, the negative ions in