Self-assembly of Eucalyptus gunnii wax tubules and pure ß-diketone on HOPG and glass

• Miriam Anna Huth,
• Axel Huth and
• Kerstin Koch

Beilstein J. Nanotechnol. 2021, 12, 939–949, doi:10.3762/bjnano.12.70

• specimens with recrystallized structures of wax and ß-diketone were prepared for SEM (Gemini Supra 40VP, Zeiss, Oberkochen, Germany) three days after the evaporation of the solvent. They were fixed on aluminum stubs (Plano, Wetzlar, Germany) with double-sided adhesive tape (Double-sided Tape Universal, Tesa

Nanogenerator-based self-powered sensors for data collection

• Yicheng Shao,
• Maoliang Shen,
• Yuankai Zhou,
• Xin Cui,
• Lijie Li and
• Yan Zhang

Beilstein J. Nanotechnol. 2021, 12, 680–693, doi:10.3762/bjnano.12.54

• ion triboelectric nanosensor [16]. By adding three ligand molecules to the surface of nanoporous anodic aluminum oxide, the detection sensitivity for Cu2+, Pb2+, and Cr3+ reached 0.005 × 10−6, 0.003 × 10−6, and 0.004 × 10−6 M, respectively. The self-powered tribo-nanosensor generates different output

A review of defect engineering, ion implantation, and nanofabrication using the helium ion microscope

• Frances I. Allen

Beilstein J. Nanotechnol. 2021, 12, 633–664, doi:10.3762/bjnano.12.52

• silicon substrate supporting an amorphous nanoporous aluminum oxide structure was irradiated with helium ions causing dome-shaped swelling of the substrate and thereby 3D deformation of the supported material, accompanied by enlargement of the nanopores to accommodate the new topography [96]. 3

• responsible for the thinning effect encountered. In a related study, helium ion irradiation of an amorphous nanoporous aluminum oxide sample caused pores to markedly shrink in size, also attributed to ion-induced mass transport [96] (Figure 4b). Further related to mass transport, local helium ion irradiation

Impact of GaAs(100) surface preparation on EQE of AZO/Al₂O₃/p-GaAs photovoltaic structures

• Piotr Caban,
• Rafał Pietruszka,
• Jarosław Kaszewski,
• Monika Ożga,
• Bartłomiej S. Witkowski,
• Krzysztof Kopalko,
• Piotr Kuźmiuk,
• Katarzyna Gwóźdź,
• Ewa Płaczek-Popko,
• Krystyna Lawniczak-Jablonska and
• Marek Godlewski

Beilstein J. Nanotechnol. 2021, 12, 578–592, doi:10.3762/bjnano.12.48

• the removal of the native oxide layer followed by an adequate surface passivation technique [13] and/or by a proper choice of the dielectric and its deposition method. Regarding the dielectric, the most common ones are aluminum oxide (Al2O3) and hafnium dioxide (HfO2) for which the preferable

• for aluminum-doped zinc oxide). Experimental GaAs surface treatment We used lightly Zn-doped GaAs single-crystal (100) wafer (p = 6.8 × 1016 cm−3, ρ = 3.2 × 10−1 Ω·cm, μ ≤ 225 cm2/Vs, d = 400 μm) (fabricated at the Institute of Electronic Materials Technology, ITME) as the substrate. Before starting

• passivation layer in the first few ALD cycles. By applying ALD, we were able to create both Al2O3 and AZO layers in a single ALD process conducted at 160 °C. Aluminum oxide was deposited within five cycles of (trimethylaluminum/Al(CH3)3, TMA, CAS:75-24-1) and H2O precursor supply while AZO required 10 multi

On the stability of microwave-fabricated SERS substrates – chemical and morphological considerations

• Limin Wang,
• Aisha Adebola Womiloju,
• Christiane Höppener,
• Ulrich S. Schubert and
• Stephanie Hoeppener

Beilstein J. Nanotechnol. 2021, 12, 541–551, doi:10.3762/bjnano.12.44

• solution. Subsequently, the microwave vial was capped with an aluminum crimp cap and a Teflon septum seal and was subjected to microwave irradiation. The microwave was set to operate at a constant irradiation power of 300 W. According to our previous investigations of the process parameters, the synthesis

Determination of elastic moduli of elastic–plastic microspherical materials using nanoindentation simulation without mechanical polishing

• Hongzhou Li and
• Jialian Chen

Beilstein J. Nanotechnol. 2021, 12, 213–221, doi:10.3762/bjnano.12.17

• aluminum, respectively (low-density polyethylene with E = 1.37 GPa, σy = 20 MPa, and E/σy ≈ 69; aluminum with E = 70 GPa, σy = 228 MPa, and E/σy ≈ 307). Figure 2 shows curves of the microsphere with 11.5 µm radius being indented to different depths by a rigid conical indenter to produce different maximum

ZnO and MXenes as electrode materials for supercapacitor devices

• Ameen Uddin Ammar,
• Ipek Deniz Yildirim,
• Feray Bakan and
• Emre Erdem

Beilstein J. Nanotechnol. 2021, 12, 49–57, doi:10.3762/bjnano.12.4

• biocompatibility, photothermal efficiency, low Seebeck coefficient, as well as good conductivity. They synthesized tantalum carbide MXene sheets from a tantalum aluminum carbide (Ta4AlC3) MAX phase through etching the intermediate aluminium with the aid of hydrofluoric acid (HF). Analysis of the synthesized

• structures with a hexagonal crystal lattice. Because the aluminum was removed, there is no visible Raman vibration. Moreover, CV, chronopotentiometry (CP), and EIS were used to test the electrochemical behavior of the synthesized tantalum carbide MXenes. In 0.1 M sulfuric acid (H2SO4) as electrolyte, a

Seebeck coefficient of silicon nanowire forests doped by thermal diffusion

• Shaimaa Elyamny,
• Elisabetta Dimaggio and
• Giovanni Pennelli

Beilstein J. Nanotechnol. 2020, 11, 1707–1713, doi:10.3762/bjnano.11.153

• is squeezed between two aluminum blocks maintained at different temperatures TH = THot and TC = TCold. Given the surface A of the sample, the squeezing pressure has been set to 20 MPa for all measured samples. A third block THRef is maintained at the same temperature as TH (within ±0.1°), so that the

• the evaluation of the Seebeck coefficient S. Simultaneously to the measurement of the thermal resistance of each sample, the voltage between the aluminum blocks TH and TC has been measured (Seebeck voltage Vseebeck for TH − TC). However, the temperature difference ΔT = TH − TC includes also the

Fabrication of nano/microstructures for SERS substrates using an electrochemical method

• Jingran Zhang,
• Tianqi Jia,
• Xiaoping Li,
• Junjie Yang,
• Zhengkai Li,
• Guangfeng Shi,
• Xinming Zhang and
• Zuobin Wang

Beilstein J. Nanotechnol. 2020, 11, 1568–1576, doi:10.3762/bjnano.11.139

• in KCl solution. In this study, the Raman intensity of R6G (2 × 10−6 mol·L−1) on the Ag substrate was larger with subsequent drying treatment than without. Anodic aluminum oxide (AAO) has been used as a mask to fabricate nanodot SERS substrates [40][41][42][43]. Using an AAO mask, Han et al. [41

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 plasma system, synthesis, and characterization methods are given in a recent publication on the growth of Al/CNW hybrid materials from aluminum acetylacetonate [17]. Synthesis The deposition experiments are performed in an inductively coupled plasma-enhanced chemical vapor deposition system

An atomic force microscope integrated with a helium ion microscope for correlative nanoscale characterization

• Santiago H. Andany,
• Gregor Hlawacek,
• Stefan Hummel,
• Charlène Brillard,
• Mustafa Kangül and
• Georg E. Fantner

Beilstein J. Nanotechnol. 2020, 11, 1272–1279, doi:10.3762/bjnano.11.111

• probes with boron-doped 1 kΩ sensing elements, connected in a Wheatstone bridge configuration with aluminum tracks [20][21] and with single crystal diamond (SCD) tips that are commercially available (SCL-SensorTech Fabrication GMBH, Vienna, Austria). The SCD tips (tip radius below 15 nm, height 12–16 µm

Plant growth regulation by seed coating with films of alginate and auxin-intercalated layered double hydroxides

• Vander A. de Castro,
• Valber G. O. Duarte,
• Danúbia A. C. Nobre,
• Geraldo H. Silva,
• Vera R. L. Constantino,
• Frederico G. Pinto,
• Willian R. Macedo and
• Jairo Tronto

Beilstein J. Nanotechnol. 2020, 11, 1082–1091, doi:10.3762/bjnano.11.93

• layered compounds, emerges as a very promising approach to a new form of growth regulator application. Thus, the presented work had three aims: (i) the synthesis and characterization of an organic–inorganic hybrid material containing a layered double hydroxide (LDH) of zinc and aluminum and the synthetic

Vibration analysis and pull-in instability behavior in a multiwalled piezoelectric nanosensor with fluid flow conveyance

• Sayyid H. Hashemi Kachapi

Beilstein J. Nanotechnol. 2020, 11, 1072–1081, doi:10.3762/bjnano.11.92

• edge and clamped-simply supported edge, respectively. The material properties of the different layers of aluminum (Al) nanoshell and piezoelectric layers (PZT-4) are shown in Table 2 and Table 3, respectively [18][20]. The other bulk and surface geometrical parameters of FC-MWPENS are shown in Table 4

Excitonic and electronic transitions in Me–Sb₂Se₃ structures

• Nicolae N. Syrbu,
• Victor V. Zalamai,
• Ivan G. Stamov and
• Stepan I. Beril

Beilstein J. Nanotechnol. 2020, 11, 1045–1053, doi:10.3762/bjnano.11.89

• crystal layers were characterized by a high reflectance, which is characteristic of metallic aluminum mirrors. Some measurements were also carried out on the spectrometer DFS-32 coupled with a Specord M-40 and a Jasco V-670. The photoconductivity spectra were obtained on a single spectrometer (MDR-2) with

Effect of Ag loading position on the photocatalytic performance of TiO₂ nanocolumn arrays

• Jinghan Xu,
• Yanqi Liu and
• Yan Zhao

Beilstein J. Nanotechnol. 2020, 11, 717–728, doi:10.3762/bjnano.11.59

• solar energy harvesting in photovoltaic and photocatalytic applications owing to their extremely high visible-light absorption and tuned effective band gap. In this work, Ag-loaded TiO2 nanocolumn (Ag-TNC) arrays were fabricated based on anodic aluminum oxide (AAO) template by combining atomic layer

• ) of Ag and the absorption of light by TiO2. These results represent a promising step forward to the development of high-performance photocatalysts for energy conversion and storage. Keywords: anodic aluminum oxide template; nanocolumn arrays; photocatalysis; surface plasmon resonance; Introduction

• preparation of 1D TiO2 nanostructures is mainly performed by using anodization [17], hydrothermal [18] and template [19] methods. Meanwhile, the most common methods for the combination with precious metals are chemical deposition [20] and physical deposition [21]. The development of anodized aluminum oxide

Structural optical and electrical properties of a transparent conductive ITO/Al–Ag/ITO multilayer contact

• Aliyu Kabiru Isiyaku,
• Ahmad Hadi Ali and
• Nafarizal Nayan

Beilstein J. Nanotechnol. 2020, 11, 695–702, doi:10.3762/bjnano.11.57

• works of Roh et al. [30] and Ding et al. [39] who used aluminum/palladium and copper interlayers, respectively. Carrier concentration and mobility of the IAAI films are higher than those of the ITO films. The IAAI carrier concentration increased from 6.2 × 10−21 to 8.9 × 10−21 cm−3 after annealing

High dynamic resistance elements based on a Josephson junction array

• Konstantin Yu. Arutyunov and
• Janne S. Lehtinen

Beilstein J. Nanotechnol. 2020, 11, 417–420, doi:10.3762/bjnano.11.32

• followed by ultrahigh vacuum deposition of materials was used for the fabrication of the nanostructures. Hybrid QPSJ samples were made of Ti, Al and aluminum oxide [12]. The high-impedance JJs studied in this paper, similar to those from [12], were fabricated from superconducting thin film Al oxidized in

• test sample fabricated from superconducting thin film aluminum oxidized in situ to form tunnel barriers. Left panel: overview of the structure. Right panel: details of the JJ element. (a) Experimental I–V characteristics of 50 pairs of Al–AlOx junctions connected in series. Inset shows a schematic of

An investigation on the drag reduction performance of bioinspired pipeline surfaces with transverse microgrooves

• Weili Liu,
• Hongjian Ni,
• Peng Wang and
• Yi Zhou

Beilstein J. Nanotechnol. 2020, 11, 24–40, doi:10.3762/bjnano.11.3

• outer surface in a concentric annulus flow were tested exclusively. As can be seen from Figure 7a, the annulus channel was composed of aluminum pipelines with different diameters. The outer diameter of the inner scaled pipeline was 19.5 mm, the inner diameter of the outer scaled pipeline was 35 mm, and

• the inner pipeline was fixed by the centering regulators. Based on the microgrooves’ geometric parameters obtained by the numerical simulation, microgrooves were manufactured on the outer surface of the aluminum pipeline by lathe machining, as shown in Figure 7b. The height and width of the

Advanced hybrid nanomaterials

• Andreas Taubert,
• Fabrice Leroux,
• Pierre Rabu and
• Verónica de Zea Bermudez

Beilstein J. Nanotechnol. 2019, 10, 2563–2567, doi:10.3762/bjnano.10.247

• example of a hybrid material in which an indigo derivative is stabilized into magnesium aluminum phyllosilicate. This material, palygorskite, was used to produce beautiful mural paintings that are still shining centuries later [1][2][3]. Since these origins, the field of hybrid materials has developed

Label-free highly sensitive probe detection with novel hierarchical SERS substrates fabricated by nanoindentation and chemical reaction methods

• Jingran Zhang,
• Tianqi Jia,
• Yongda Yan,
• Li Wang,
• Peng Miao,
• Yimin Han,
• Xinming Zhang,
• Guangfeng Shi,
• Yanquan Geng,
• Zhankun Weng,
• Daniel Laipple and
• Zuobin Wang

Beilstein J. Nanotechnol. 2019, 10, 2483–2496, doi:10.3762/bjnano.10.239

• /nanomachining methods [26][27][28][29][30] have been used to fabricate SERS substrates with two main advantages. First, the wear of the tip is negligible during machining on the metal surface due to the low hardness of the metals used (copper, aluminum). Second, the micro/nanomechanical machining method is

The role of Ag⁺, Ca²⁺, Pb²⁺ and Al³⁺ adions in the SERS turn-on effect of anionic analytes

• Stefania D. Iancu,
• Andrei Stefancu,
• Vlad Moisoiu,
• Loredana F. Leopold and
• Nicolae Leopold

Beilstein J. Nanotechnol. 2019, 10, 2338–2345, doi:10.3762/bjnano.10.224

• emitting at 532 nm at a power of ≈20 mW measured on the sample. In form of 10 µL drops, the sample solution was placed on a microscope slide covered with aluminum foil. The laser was focused on the liquid drop using a 5× objective (NA = 0.12). The spectra were recorded by averaging four acquisitions of 4 s

Four self-made free surface electrospinning devices for high-throughput preparation of high-quality nanofibers

• Yue Fang and
• Lan Xu

Beilstein J. Nanotechnol. 2019, 10, 2261–2274, doi:10.3762/bjnano.10.218

• reservoir to the grounded collector was 18 cm, and the collector surfaces (200 mm × 200 mm) were covered with conductive aluminum foil in order to easily remove the electrospun nanofibers for further measurements. The electrospun nanofibers were dried at room temperature and sputter-coated with a gold film

• the yield of nanofibers, W0 and W1 are the weights of the aluminum foils before and after spinning and t is the spinning time. Results and Discussion Modeling the electric field The results of the simulations of the electric field inside the MBE, MFSE, OSFSE and SSFSE devices are illustrated in Figure

Nontoxic pyrite iron sulfide nanocrystals as second electron acceptor in PTB7:PC₇₁BM-based organic photovoltaic cells

• Olivia Amargós-Reyes,
• José-Luis Maldonado,
• Omar Martínez-Alvarez,
• María-Elena Nicho,
• José Santos-Cruz,
• Juan Nicasio-Collazo,
• Irving Caballero-Quintana and
• Concepción Arenas-Arrocena

Beilstein J. Nanotechnol. 2019, 10, 2238–2250, doi:10.3762/bjnano.10.216

• active layer thickness was measured by AFM (Easyscan2 from Nanosurf) in contact mode employing cantilever tips with the aluminum reflective coating (ContAl-G) from BudgetSensors. The AFM roughness images were acquired in dynamic force mode (using PPP-NCLAu from NanoSensors), because it shows better

Green and scalable synthesis of nanocrystalline kuramite

• Andrea Giaccherini,
• Giuseppe Cucinotta,
• Stefano Martinuzzi,
• Enrico Berretti,
• Werner Oberhauser,
• Alessandro Lavacchi,
• Giovanni Orazio Lepore,
• Giordano Montegrossi,
• Maurizio Romanelli,
• Antonio De Luca,
• Massimo Innocenti,
• Vanni Moggi Cecchi,
• Matteo Mannini,
• Antonella Buccianti and
• Francesco Di Benedetto

Beilstein J. Nanotechnol. 2019, 10, 2073–2083, doi:10.3762/bjnano.10.202

• SEM micrographs of the powders deposited on an aluminum stub after coating the sample with Au. The phase determination of the synthetic products was carried out on the Rietveld refinement of the XRD pattern by using the “GSAS II” software [46]. The instrumental parameters for the Rietveld refinement

Synthesis of highly active ETS-10-based titanosilicate for heterogeneously catalyzed transesterification of triglycerides

• Muhammad A. Zaheer,
• David Poppitz,
• Khavar Feyzullayeva,
• Marianne Wenzel,
• Jörg Matysik,
• Radomir Ljupkovic,
• Aleksandra Zarubica,
• Alexander A. Karavaev,
• Andreas Pöppl,
• Roger Gläser and
• Muslim Dvoyashkin

Beilstein J. Nanotechnol. 2019, 10, 2039–2061, doi:10.3762/bjnano.10.200