A broadband detector based on series YBCO grain boundary Josephson junctions

• Egor I. Glushkov,
• Alexander V. Chiginev,
• Leonid S. Kuzmin and
• Leonid S. Revin

Beilstein J. Nanotechnol. 2022, 13, 325–333, doi:10.3762/bjnano.13.27

• detection at frequencies higher than 100 Hz, where the noise falls [45], and second, to reduce the noise by annealing the YBCO bicrystal junction in atomic oxygen [39]. (a–c) Three log-periodic antennas of various geometries; (d) system with a lens (d) and (e) beam pattern at 250 GHz. Normalized level of

Oxidation of Au/Ag films by oxygen plasma: phase separation and generation of nanoporosity

• Abdel-Aziz El Mel,
• Said A. Mansour,
• Mujaheed Pasha,
• Atef Zekri,
• Janarthanan Ponraj,
• Akshath Shetty and
• Yousef Haik

Beilstein J. Nanotechnol. 2020, 11, 1608–1614, doi:10.3762/bjnano.11.143

• : metal alloys; nanoporous; oxygen plasma; silver; thin films; Introduction Silver corrosion upon exposure to atomic oxygen is a phenomenon that was highly studied in the 1980s. At that time, the main aim was to avoid the degradation of silver interconnects and switches used in satellites navigating in

• the low earth orbit (LEO) [1][2][3][4][5][6][7][8][9]. Silver degradation related to this phenomenon was attributed to the strong chemical reaction between silver and atomic oxygen present in the LEO resulting in the transformation of the metallic silver into highly stressed and nanoporous silver

• a few have reported on the oxidation of silver alloys [15][20][21]. Gao et al. investigated the oxidation of Ag/Cu alloy by exposure to atomic oxygen. They demonstrated that the resistance of silver against corrosion by atomic oxygen was improved due to the presence of copper in the alloy [21]. From

One-step synthesis of carbon-supported electrocatalysts

• Sebastian Tigges,
• Nicolas Wöhrl,
• Ivan Radev,
• Ulrich Hagemann,
• Markus Heidelmann,
• Thai Binh Nguyen,
• Stanislav Gorelkov,
• Stephan Schulz and
• Axel Lorke

Beilstein J. Nanotechnol. 2020, 11, 1419–1431, doi:10.3762/bjnano.11.126

• %), the substrate temperature does not have any influence on Pt loading (not shown here). The addition of hydrogen into the plasma reduces the degree of oxidation of the whole Pt/CNW layer (P10 vs P9 vs P8; Table 3), most likely due to a depletion of atomic oxygen, as determined by OES (Supporting

Improved catalytic combustion of methane using CuO nanobelts with predominantly (001) surfaces

• Qingquan Kong,
• Yichun Yin,
• Bing Xue,
• Yonggang Jin,
• Wei Feng,
• Zhi-Gang Chen,
• Shi Su and
• Chenghua Sun

Beilstein J. Nanotechnol. 2018, 9, 2526–2532, doi:10.3762/bjnano.9.235

• release atomic oxygen after exceeding the small barrier of 0.47 eV, which can oxidize adsorbed CO to form CO2, as outlined in Figure 4i–l. The energy profile for the above full process is given in Figure 5 in units of eV, using the total energy of a clean (001) surface and free gas-phase CH4 and O2 as the

Comparing postdeposition reactions of electrons and radicals with Pt nanostructures created by focused electron beam induced deposition

• Julie A. Spencer,
• Michael Barclay,
• Miranda J. Gallagher,
• Robert Winkler,
• Ilyas Unlu,
• Yung-Chien Wu,
• Harald Plank,
• Lisa McElwee-White and
• D. Howard Fairbrother

Beilstein J. Nanotechnol. 2017, 8, 2410–2424, doi:10.3762/bjnano.8.240

• surface area Pt catalysts and may reverse the effects of sintering. In marked contrast to the effect observed with AH, densification of the structure was observed during the postdeposition purification of PtCx deposits created from MeCpPtMe3 using atomic oxygen (AO), although the limited penetration depth

• of AO restricts its effectiveness as a purification strategy to relatively small nanostructures. Keywords: atomic hydrogen; atomic oxygen; electron beam processing; focused electron beam induced deposition (FEBID); purification; Introduction Focused electron beam induced deposition (FEBID) has

• roughness. Wnuk et al. [28] subjected deposits created from Me2Au(acac) to AH and/or atomic oxygen (AO). AH removed all of the O atoms and the majority of C atoms from the deposit while AO removed all of the C atoms far more efficiently than AH, but with some accompanying Au oxidation. However, exposure to

Formation of pure Cu nanocrystals upon post-growth annealing of Cu–C material obtained from focused electron beam induced deposition: comparison of different methods

• Aleksandra Szkudlarek,
• Alfredo Rodrigues Vaz,
• Yucheng Zhang,
• Andrzej Rudkowski,
• Czesław Kapusta,
• Rolf Erni,
• Stanislav Moshkalev and
• Ivo Utke

Beilstein J. Nanotechnol. 2015, 6, 1508–1517, doi:10.3762/bjnano.6.156

• [38]. The metal content could be then increased by two sequential purification steps: 1) deposit bombardment with atomic oxygen 2) deposit bombardment with atomic hydrogen. In the first step the carbonaceous material was fully removed from the material and in the next step the metal oxide was reduced

Electron-stimulated purification of platinum nanostructures grown via focused electron beam induced deposition

• Brett B. Lewis,
• Michael G. Stanford,
• Jason D. Fowlkes,
• Kevin Lester,
• Harald Plank and
• Philip D. Rack

Beilstein J. Nanotechnol. 2015, 6, 907–918, doi:10.3762/bjnano.6.94

• simulation coupled with (2) an explicit finite difference treatment of oxygen diffusion and the (3) Huen–Euler method to approximate the dissociative chemisorption of atomic oxygen on metal nanoparticle surfaces internal to the deposited solid. Electron energy loss converts bound oxygen into an activated

• atomic oxygen at nanoparticle surfaces. ΦO2 is the impingement rate of mobile O2 on the nanoparticle surface (this parameter is derived from Monte Carlo simulations of a diffusing test particle impinging on a spherical nanoparticle and will be discussed in detail in the future publication) and depends on

• the concentration of mobile oxygen, the nanoparticle radius, depth into the deposit and time. Also important to the adsorption interaction is the sticking parameter (δ), the number of binding sites per unit nanoparticle area (sd) and the mean residence time of atomic oxygen on the nanoparticles (τ

Cathode lens spectromicroscopy: methodology and applications

• T. O. Menteş,
• G. Zamborlini,
• A. Sala and
• A. Locatelli

Beilstein J. Nanotechnol. 2014, 5, 1873–1886, doi:10.3762/bjnano.5.198

• . In the above example of FeOx growth on Ru(0001), further oxidation by using NO2 as atomic oxygen source resulted in the transformation of the FeO wetting layer to hematite (α-Fe2O3) and the triangular Fe3O4 islands to maghemite (γ-Fe2O3) [71]. In an independent study, the real-time observation of

Volcano plots in hydrogen electrocatalysis – uses and abuses

• Paola Quaino,
• Fernanda Juarez,
• Elizabeth Santos and
• Wolfgang Schmickler

Beilstein J. Nanotechnol. 2014, 5, 846–854, doi:10.3762/bjnano.5.96

• energy of adsorption of atomic oxygen; other candidates such as OH or OOH adsorption energies show decent linear correlations with oxygen adsorption. In acid solutions, the first and rate-determining step is: In the outer sphere mode this reaction has a standard equilibrium potential of −0.046 V SHE

Synthesis of indium oxi-sulfide films by atomic layer deposition: The essential role of plasma enhancement

• Cathy Bugot,
• Nathanaëlle Schneider,
• Daniel Lincot and
• Frédérique Donsanti

Beilstein J. Nanotechnol. 2013, 4, 750–757, doi:10.3762/bjnano.4.85

• ·{In2S3} + 2·O2 plasma have similar properties, show the critical role of activated oxygen during the deposition of In2(S,O)3. Commonly existing species in oxygen plasmas are atomic oxygen that is created from molecular oxygen dissociation, excited oxygen species at different electronic levels, ionized

Ellipsometry and XPS comparative studies of thermal and plasma enhanced atomic layer deposited Al₂O₃-films

• Jörg Haeberle,
• Karsten Henkel,
• Hassan Gargouri,
• Franziska Naumann,
• Bernd Gruska,
• Michael Arens,
• Massimo Tallarida and
• Dieter Schmeißer

Beilstein J. Nanotechnol. 2013, 4, 732–742, doi:10.3762/bjnano.4.83

• °C, 100 °C, 80 °C, and 27 °C (rt) substrate temperature. Nitrogen (N2) with 40 sccm flow was used as carrier gas for TMA. Atomic oxygen was generated by SENTECH’s CCP source. Thereby, a constant oxygen flow rate of 75 sccm was adjusted. The pulse duration of the TMA was 120 ms whereas for the oxygen

Functionalization of vertically aligned carbon nanotubes

• Eloise Van Hooijdonk,
• Carla Bittencourt,
• Rony Snyders and
• Jean-François Colomer

Beilstein J. Nanotechnol. 2013, 4, 129–152, doi:10.3762/bjnano.4.14

• ). Functionalization of vertically aligned MWCNTs performed by using atomic oxygen, generated by a microwave plasma, was reported to graft oxygen functional groups onto the tips of the VA-MWCNTs, without perturbation of the CNT alignment and structure. The CNT tips are more reactive than the CNT sidewalls [104][105

Catalytic activity of nanostructured Au: Scale effects versus bimetallic/bifunctional effects in low-temperature CO oxidation on nanoporous Au

• Lu-Cun Wang,
• Yi Zhong,
• Haijun Jin,
• Daniel Widmann,
• Jörg Weissmüller and
• R. Jürgen Behm

Beilstein J. Nanotechnol. 2013, 4, 111–128, doi:10.3762/bjnano.4.13

• details see [12]). Desorption spectra of O2 (m/z = 32) recorded on the fresh NPG(Ag)-4 catalyst showed a pronounced O2 desorption peak at around 270 °C (see Figure 7a), which we assigned to the desorption of atomic oxygen species chemisorbed on Au surface sites [12]. In the spectrum recorded after the

• pulse reaction, however, this peak is essentially absent (see Figure 7a), indicating that the related oxygen species was removed by reaction with CO molecules. The desorption temperature, which is close to that reported for the desorption of atomic oxygen from Au surfaces (270–300 °C [66][67][68][69

• ]) and lower than that for the desorption of oxygen from Ag surfaces (322 ± 25 °C [70][71][72]), points to atomic oxygen species adsorbed on Au sites as the origin for this peak (for the exact nature of the oxygen species see below). This agrees with the conclusions derived from the pulse measurements