Nanocomposite–parylene C thin films with high dielectric constant and low losses for future organic electronic devices

• Marwa Mokni,
• Gianluigi Maggioni,
• Abdelkader Kahouli,
• Sara M. Carturan,
• Walter Raniero and
• Alain Sylvestre

Beilstein J. Nanotechnol. 2019, 10, 428–441, doi:10.3762/bjnano.10.42

• other pure materials such as SiO2, polyimide, polyethylene, alumina (Al2O3), benzocyclobutenes (BCB) and SiO2/poly(methyl methacrylate) (PMMA), nanocomposite parylene C (NCPC) exhibits some interesting properties [39][40][41][42][43][44][45][46][47]. As an example, parylene C/Silica nanocomposites show

• C/Al2O3 bilayers applied to medical devices exhibit a longer-term reliability in comparison to pure PPXC. The goal of this study is to improve the electrical properties of parylene C used in advanced electronic devices [52][53][54] as a gate dielectric or an insulation coating. The challenge is to

Sub-wavelength waveguide properties of 1D and surface-functionalized SnO₂ nanostructures of various morphologies

• Venkataramana Bonu,
• Binaya Kumar Sahu,
• Arindam Das,
• Sankarakumar Amirthapandian,
• Sandip Dhara and
• Harish C. Barshilia

Beilstein J. Nanotechnol. 2019, 10, 379–388, doi:10.3762/bjnano.10.37

• of SnO2 QDs was discussed in our earlier report [18]. In the case of VLS growth, a mixture of SnO2 QDs of diameter 2.4 nm and graphite powder (Alfa Aesar, 99.9995%) in a 3:1 weight ratio was placed in a high purity Al2O3 (99.99 %) boat. Au-coated Si (100) was used as the substrate. A Au film of 3 nm

• thickness was coated on the Si (100) substrate by using the thermal evaporation (Hind Vacuum, India) technique under a base pressure of 5.0 × 10−6 mbar. The Si substrate coated with the Au film, used as a catalyst in the growth of SnO2 NWs, was placed 10 mm away from the precursor material in the Al2O3 boat

• one case the growth temperature was 950 °C and in the other case it was 1000 °C (Figure S1a). In the case of VS growth, a mixture of SnO2 QDs of size 2.4 nm and graphite powder (Alfa Aesar, 99.9995%) in a 3:1 weight ratio was placed in a high purity Al2O3 crucible (99.99%). The NWs were grown in the

Relation between thickness, crystallite size and magnetoresistance of nanostructured La_1−xSr_xMn_yO_3±δ films for magnetic field sensors

• Rasuole Lukose,
• Valentina Plausinaitiene,
• Milita Vagner,
• Nerija Zurauskiene,
• Skirmantas Kersulis,
• Virgaudas Kubilius,
• Karolis Motiejuitis,
• Birute Knasiene,
• Voitech Stankevic,
• Zita Saltyte,
• Martynas Skapas,
• Algirdas Selskis and
• Evaldas Naujalis

Beilstein J. Nanotechnol. 2019, 10, 256–261, doi:10.3762/bjnano.10.24

• 10.3762/bjnano.10.24 Abstract In the present study the advantageous pulsed-injection metal organic chemical vapour deposition (PI-MOCVD) technique was used for the growth of nanostructured La1−xSrxMnyO3±δ (LSMO) films on ceramic Al2O3 substrates. The compositional, structural and magnetoresistive

• ) [19][20] was used to enable easy and reproducible control of the growth rate and nucleation site density by introducing the additional supply source of the precursor solution to the reaction chamber. The novelty of our investigations concerns the growth of La1−xSrxMnyO3±δ (LSMO) films on ceramic Al2O3

• show no secondary phases, only the characteristic peaks associated with the Al2O3 substrate and polycrystalline LSMO films with a perovskite-like crystal structure with rhombohedral distortions (the space group ) for both deposition series. The shift of the characteristic LSMO peaks to higher θ/2θ

Interaction of Te and Se interlayers with Ag or Au nanofilms in sandwich structures

• Arkadiusz Ciesielski,
• Lukasz Skowronski,
• Marek Trzcinski,
• Ewa Górecka,
• Wojciech Pacuski and
• Tomasz Szoplik

Beilstein J. Nanotechnol. 2019, 10, 238–246, doi:10.3762/bjnano.10.22

• common sublayers for silver and gold are Cr [1][2], Ti [2][13][14], Ni [14][15], Cu [16], Ge [3][14][15][17] as well as amorphous hydrogenated carbon (a-C:H) [4], polymer layers [18][19] and recently also Al2O3 [9]. The use of these materials is relatively inexpensive and is an easy way to promote the

Nanoporous water oxidation electrodes with a low loading of laser-deposited Ru/C exhibit enhanced corrosion stability

• Sandra Haschke,
• Dmitrii Pankin,
• Vladimir Mikhailovskii,
• Maïssa K. S. Barr,
• Adriana Both-Engel,
• Alina Manshina and
• Julien Bachmann

Beilstein J. Nanotechnol. 2019, 10, 157–167, doi:10.3762/bjnano.10.15

• inside the Al2O3 pores (with additional material on the front sample side, Figure 6a,d). In a last step, an ITO electrical contact is sputter-coated onto the front side of the sample. EDX spectroscopy reveals the presence of expected elements Al, O, P and In of the substrate and electrical contact, as

• samples, or equivalently, 41 mg cm−3 (given the density of the Al2O3 framework) [44], or alternatively, as areal loadings, for example 53 µg cm−2 for a pore length of 13 µm. The volumetric value is comparable to state-of-the-art catalytic water oxidation systems based on supported RuOx (40–50 mg cm−3 have

• (“bulk”). The overview XPS spectrum of an as-prepared nanostructured sample features only Ru, O and C (Figure 8a) from the Ru/C layer, whereas the Al2O3 substrate is completely covered and reveals no Al signal. Deconvolution of the Ru 3d region, which is superimposed with C 1s (Figure 8b), reveals two

A comparison of tarsal morphology and traction force in the two burying beetles Nicrophorus nepalensis and Nicrophorus vespilloides (Coleoptera, Silphidae)

• Liesa Schnee,
• Benjamin Sampalla,
• Josef K. Müller and
• Oliver Betz

Beilstein J. Nanotechnol. 2019, 10, 47–61, doi:10.3762/bjnano.10.5

• higher compared with those on the smooth (difference in mean value = 18.5; p < 0.001) and the micro-rough (difference in mean value = 15.4; p < 0.001) surfaces. For the nanotribometer experiments, we used the same silanized Al2O3 grinding disc surfaces as previously described by Betz and co-workers [19

• ]. The roughness parameters of the micro-rough and the rough Al2O3 grinding discs were as determined by Betz et al. (Table 1 in [19]) and amounted to 0.05 µm (“nano-rough”), 3 µm (“micro-rough”) and 11 µm (“rough”) (given as Ra values). These surfaces were better wettable with non-polar substances (such

• texture, the calculated surface free energies of 33.3 mN·m−1 (micro-rough surface) and 42.2 mN·m−1 (rough surface) (Table 2 in [19]), respectively, should not be considered as absolute values, which can only be determined for ideal, perfectly smooth surfaces [20]. The plasma-treated Al2O3 grinding disc

Electrostatic force microscopy for the accurate characterization of interphases in nanocomposites

• Diana El Khoury,
• Richard Arinero,
• Jean-Charles Laurentie,
• Mikhaël Bechelany,
• Michel Ramonda and
• Jérôme Castellon

Beilstein J. Nanotechnol. 2018, 9, 2999–3012, doi:10.3762/bjnano.9.279

• nm) were deposited or grown over the whole sample surface. Aluminum oxide (Al2O3) shells were prepared using the atomic layer deposition (ALD) method, polyvinyl acetate (PVAc) shells by spin coating, and silicon dioxide (SiO2) shells by plasma sputtering deposition (PSD). The signature of each

• . Approach 1: PS + Al2O3 and PS + Al2O3 + PVAc In the first method, the EFM signals for PS + 100 nm Al2O3 and PS + 100 nm Al2O3 + PVAc samples were compared (Figure 1). These samples mimicked a nanodielectric that has interphase (Al2O3) without and with a matrix surface layer, respectively. Al2O3 was the

• interphase model material to be detected, while PVAc (matrix) and PS (particle) were the known materials (depicted in Figure 1). As in the absence of interphase, εPVAc = 3.2 > εPS = 2.6, PVAc addition over the particles should increase the signal [34][35][36]. Conversely, in the presence of the Al2O3

Controlling surface morphology and sensitivity of granular and porous silver films for surface-enhanced Raman scattering, SERS

• Sherif Okeil and
• Jörg J. Schneider

Beilstein J. Nanotechnol. 2018, 9, 2813–2831, doi:10.3762/bjnano.9.263

• Scientific UV–vis spectrophotometer (Evolution 600). The water contact angle was measured using a Krüss DSA 30 model drop-shape analysis system. The water contact angle was measured by placing 5 µL water droplets on the silver surface. Atomic layer deposition (ALD) of Al2O3 Silver films on glass substrates

• were inserted into the ALD chamber (Savannah G2, Ultratech/CNT, Cambridge Nanotech) for deposition of a 1 nm thick layer of Al2O3 using trimethylaluminium (98+%, Strem Chemicals, Inc.) and water (HPLC grade, Sigma Aldrich) as precursors at 200 °C. The precursors were vaporized at room temperature and

• 20 sccm argon was used as carrier gas. The exposure time for both, trimethylaluminium and water, were 0.015 s and the flushing between the precursor pulses was done with argon for 5 s. For deposition of 1 nm Al2O3 ten cycles were carried out. SERS measurements on the prepared silver films Rhodamine B

Oriented zinc oxide nanorods: A novel saturable absorber for lasers in the near-infrared

• Pavel Loiko,
• Tanujjal Bora,
• Josep Maria Serres,
• Haohai Yu,
• Magdalena Aguiló,
• Francesc Díaz,
• Uwe Griebner,
• Valentin Petrov,
• Xavier Mateos and
• Joydeep Dutta

Beilstein J. Nanotechnol. 2018, 9, 2730–2740, doi:10.3762/bjnano.9.255

• exciton binding energy (60 meV) [3], allowing for efficient excitonic photoluminescence at room temperature, and due to their good mechanical and thermal stability. Arrays of ZnO NRs can be grown on various substrates (e.g., Si, Al2O3, glass) either by gas phase processes (e.g., by vapor–liquid–solid

Friction reduction through biologically inspired scale-like laser surface textures

• Johannes Schneider,
• Vergil Djamiykov and
• Christian Greiner

Beilstein J. Nanotechnol. 2018, 9, 2561–2572, doi:10.3762/bjnano.9.238

• against metallic (100Cr6), polymeric (PEEK) and ceramic (Al2O3) counter bodies. Additionally, a possible size effect was investigated by changing the scale diameter between 13 and 150 µm under dry sliding contact against sapphire. Our results demonstrate that depending on the contact conditions a

• were observed (see Figure S3, Supporting Information File 1 for an optical micrograph of a PEEK disc after a tribological experiment). Ceramic counter body (Al2O3) For tribological applications, a wide range of ceramics has been experimentally tested in contacts involving laser surface textures

• . Aluminium oxide is a common material in those investigations [35][36]. Therefore, and because Al2O3 can be considered as the model engineering ceramic, it was chosen as the counter body material for testing the performance of the scale-like surface morphology in a steel-on-ceramic contact. The results of

High-temperature magnetism and microstructure of a semiconducting ferromagnetic (GaSb)_1−x(MnSb)_x alloy

• Leonid N. Oveshnikov,
• Elena I. Nekhaeva,
• Alexey V. Kochura,
• Alexander B. Davydov,
• Mikhail A. Shakhov,
• Sergey F. Marenkin,
• Oleg A. Novodvorskii,
• Alexander P. Kuzmenko,
• Alexander L. Vasiliev,
• Boris A. Aronzon and
• Erkki Lahderanta

Beilstein J. Nanotechnol. 2018, 9, 2457–2465, doi:10.3762/bjnano.9.230

• , which was sputtered by the second harmonic radiation of a Q-switched YAG:Nd laser (λ = 532 nm). Al2O3(0001) single crystals were used as substrates. A more detailed description of the growth technology can be found in [15]. Magnetization was measured at temperatures of T = 5–310 K in magnetic fields up

• using S/TEM, AFM and MFM methods. In the present TEM/EDX microanalysis study of the GaSb–MnSb/α-Al2O3 system the actual investigation was performed on a cross-sectional piece of sample GM3 with lateral sizes of about 1 μm. The results are presented in Figure 4a and Figure 4b. The film thickness is about

Surface energy of nanoparticles – influence of particle size and structure

• Dieter Vollath,
• Franz Dieter Fischer and
• David Holec

Beilstein J. Nanotechnol. 2018, 9, 2265–2276, doi:10.3762/bjnano.9.211

• surface energy that occurs after the minimum around the 3 nm particle diameter mark. The values corrected according to Holec et al. [53] take the physical size of the nanoparticles into account. High-resolution electron micrograph of a zirconia, ZrO2, and an alumina, Al2O3 nanoparticles. (a) A perfectly

Electrospun one-dimensional nanostructures: a new horizon for gas sensing materials

• Muhammad Imran,
• Nunzio Motta and
• Mahnaz Shafiei

Beilstein J. Nanotechnol. 2018, 9, 2128–2170, doi:10.3762/bjnano.9.202

• -Fe2O3 nanostructured NFs/NTs have been functionalized by Ca [205], La [206], Pd [207], Sm [208], Al2O3 [209] and Ce [10] and applied to sensing of ethanol, acetone and formaldehyde. The sensing performance of α-Fe2O3 is improved by increased doping with Ca. Mismatch between the radii of Ca2+and Fe3

• , respectively [225]. Al2O3–In2O3 composites with a heterostructure and mesoporous tubular structure have been applied to room temperature NOx sensing [226]. These composite NTs can detect 291 ppb of NOx at room temperature with a response of 0.74 and a response time of 24 s. The atomic ratios of In and Al were

• 100:0, 100:15, 100:20 and 100:25, and are labelled as pure In2O3 NTs, meso-15AI NTs, meso-20AI NTs and meso-25AI NRs, respectively. The average diameter of the NTs is around 200 nm. The crystallite size of In2O3 reduces with increasing Al2O3 content. The grain size in pure In2O3 reduces from 30–50 nm

Synthesis of carbon nanowalls from a single-source metal-organic precursor

• André Giese,
• Sebastian Schipporeit,
• Volker Buck and
• Nicolas Wöhrl

Beilstein J. Nanotechnol. 2018, 9, 1895–1905, doi:10.3762/bjnano.9.181

• carbon, aluminium, chromium and iron from the stainless steel substrate, and oxygen can be identified. The oxygen is likely from the metal-organic precursor, which also contains oxygen. Thus, in addition to the Al3C4 clusters, also Al2O3 compounds in the films are possible, also H2O adsorption cannot be

Cryochemical synthesis of ultrasmall, highly crystalline, nanostructured metal oxides and salts

• Elena A. Trusova and
• Nikolai S. Trutnev

Beilstein J. Nanotechnol. 2018, 9, 1755–1763, doi:10.3762/bjnano.9.166

• , aqueous solutions of Al- and Fe-sulfates were used to obtain highly dispersed Al2O3 and Fe2O3 crystallites by a freeze-drying technique. The formation and growth of chain-like aggregates of crystallites was shown as a process followed the surface diffusion mechanism. It was observed that the orientation

Light extraction efficiency enhancement of flip-chip blue light-emitting diodes by anodic aluminum oxide

• Yi-Ru Huang,
• Yao-Ching Chiu,
• Kuan-Chieh Huang,
• Shao-Ying Ting,
• Po-Jui Chiang,
• Chih-Ming Lai,
• Chun-Ping Jen,
• Snow H. Tseng and
• Hsiang-Chen Wang

Beilstein J. Nanotechnol. 2018, 9, 1602–1612, doi:10.3762/bjnano.9.152

• of the pore structure in this direction. In Figure 3e, the orange dotted line represents the boundary between pores and the sapphire substrate of AAO60. The area bounded by the yellow dotted line is Al, the area bounded by the blue dotted line is a pore, and the area between these lines is Al2O3. In

• Al2O3 is 100 nm, which is consistent with the hole radius. If the hole radius decreases, then the yellow area (Al) will expand. Figure 10a shows the calculation results obtained with different Al2O3 thicknesses and diameter values of air holes in the absence of Al. All the three samples have the same

• transmittance of 440–450 nm. However, AAO80 has wider transmittance windows than other samples. Figure 10b shows that transmittance drastically decreases when Al is present in the sample structure. The thickness of Al in the form of Al2O3 is less than 10 nm. Figure 10c shows the modified absorption result for

Understanding the performance and mechanism of Mg-containing oxides as support catalysts in the thermal dry reforming of methane

• Nor Fazila Khairudin,
• Mohd Farid Fahmi Sukri,
• Mehrnoush Khavarian and
• Abdul Rahman Mohamed

Beilstein J. Nanotechnol. 2018, 9, 1162–1183, doi:10.3762/bjnano.9.108

• in DRM. Application of MgO as a co-support Abdollahifar et al. [49] investigated catalyst performance by applying the ultrasound-assisted impregnation (sonochemistry) method in the synthesis of a Ni/Al2O3–MgO catalyst for a DRM reaction. The measured surface area for the Ni/Al2O3–MgO catalyst was

• 800 °C, the recorded CO2 is markedly higher than CH4 conversion and the H2/CO ratio reaches unity. The Ni/Al2O3–MgO catalyst was stable without deactivation for up to 53 h at a reaction temperature of 700 °C. The recorded performance might be influenced by the high surface area of Al2O3 and the high

• CO2/CH4 ratio. The conversion of CO2 and CH4 was in the range of 70 to 80% when the obtained H2/CO ratio was between 1 and 1.5. The influence of the synthesis method on the Ni/Al2O3–MgO catalyst by sol–gel and impregnation techniques was investigated by Hassani Rad et al. [37]. A higher specific

Field-controlled ultrafast magnetization dynamics in two-dimensional nanoscale ferromagnetic antidot arrays

• Anulekha De,
• Sucheta Mondal,
• Sourav Sahoo,
• Saswati Barman,
• Yoshichika Otani,
• Rajib Kumar Mitra and
• Anjan Barman

Beilstein J. Nanotechnol. 2018, 9, 1123–1134, doi:10.3762/bjnano.9.104

• -thick protective layer of Al2O3 was deposited on top of the Py film in an ultrahigh vacuum chamber at a base pressure of 2 × 10−8 Torr. The Al2O3 capping layer was deposited on the Py film to protect the samples from external contamination of the environment, degradation with time, and also from direct

Comparative study of antibacterial properties of polystyrene films with TiO_x and Cu nanoparticles fabricated using cluster beam technique

• Vladimir N. Popok,
• Cesarino M. Jeppesen,
• Peter Fojan,
• Anna Kuzminova,
• Jan Hanuš and
• Ondřej Kylián

Beilstein J. Nanotechnol. 2018, 9, 861–869, doi:10.3762/bjnano.9.80

• organic cells. Because of these toxic properties the films and nanostructures of such metals or metal compounds are widely used as antibacterial and antimicrobial agents. Among them are Ag, Cu, Au, CuO, ZnO, Fe3O4, Al2O3 and TiO2, to name just a few [1][2][3]. They all exhibit bactericidal properties

Facile synthesis of a ZnO–BiOI p–n nano-heterojunction with excellent visible-light photocatalytic activity

• Mengyuan Zhang,
• Jiaqian Qin,
• Pengfei Yu,
• Bing Zhang,
• Mingzhen Ma,
• Xinyu Zhang and
• Riping Liu

Beilstein J. Nanotechnol. 2018, 9, 789–800, doi:10.3762/bjnano.9.72

• degradation [3][4][5][6], nitrogen fixation [7][8], to solar fuel production [9]. The metal oxides, such as CdO [10], Al2O3 [11], and CuO [12][13], has attracted a lot of interest in photocatalytic applications. And among all of these metal oxides, it is titanium dioxide and zinc oxide (TiO2 and ZnO) that are

A review of carbon-based and non-carbon-based catalyst supports for the selective catalytic reduction of nitric oxide

• Shahreen Binti Izwan Anthonysamy,
• Syahidah Binti Afandi,
• Mehrnoush Khavarian and
• Abdul Rahman Bin Mohamed

Beilstein J. Nanotechnol. 2018, 9, 740–761, doi:10.3762/bjnano.9.68

• (ZSM-5), TiO2, and Al2O3 supported materials, were identified as the most up-to-date and recently used catalysts for the removal of NO gas. The main focus of this review is the study of catalyst preparation methods, as this is highly correlated to the behaviour of NO removal. The general mechanisms

• loading Zn- (Fe-, Ni-, Cu- or Ag-) promoted Co/Al2O3 catalyst to study the effect of additive metals on the SCR of NO. From the experimental studies, it was found that this technique definitely contributes towards a good homogeneous dispersion and helps prevent aggregation of highly deposited cobalt on

The effect of atmospheric doping on pressure-dependent Raman scattering in supported graphene

• Egor A. Kolesov,
• Mikhail S. Tivanov,
• Olga V. Korolik,
• Olesya O. Kapitanova,
• Xiao Fu,
• Hak Dong Cho,
• Tae Won Kang and
• Gennady N Panin

Beilstein J. Nanotechnol. 2018, 9, 704–710, doi:10.3762/bjnano.9.65

• doping by adsorbates [13], and substrate-induced electrostatic doping [16]. The G and 2D peak positions upshifted by 5–8 cm−1 and the considerably low I2D/IG ratio of 1.3–1.4 for graphene transferred onto copper and Al2O3 could be explained by similar effects, which in this case, tend to be less

• graphene transferred to Cu and Al2O3 as typical conducting and dielectric materials, a stronger carrier density change was obtained for the latter. As the pressure decreases, removal of adsorbates from the surface of graphene on Al2O3 results in the Raman spectra parameters becoming close to those typical

• (interaction energy of 0.72 J/m2 against ≈0.47 J/m2 for graphene on Al2O3 substrate [20][21]) and therefore more pronounced substrate-induced doping [16]. Besides, the electrostatic screening of the electron–electron interaction for graphene on a metallic substrate [22][23] can contribute. The screening effect

Combined pulsed laser deposition and non-contact atomic force microscopy system for studies of insulator metal oxide thin films

• Daiki Katsube,
• Hayato Yamashita,
• Satoshi Abo and
• Masayuki Abe

Beilstein J. Nanotechnol. 2018, 9, 686–692, doi:10.3762/bjnano.9.63

• ][41][42]. Different conditions of annealing and sputtering result in different types of surface reconstruction even under the same preparation conditions [26]. As an example of an insulator metal oxide, an Al2O3(0001) surface prepared using iterations of annealing and sputtering was imaged with atomic

Review: Electrostatically actuated nanobeam-based nanoelectromechanical switches – materials solutions and operational conditions

• Liga Jasulaneca,
• Jelena Kosmaca,
• Raimonds Meija,
• Jana Andzane and
• Donats Erts

Beilstein J. Nanotechnol. 2018, 9, 271–300, doi:10.3762/bjnano.9.29

• cycles with stable actuation voltages [47]. The jump-in voltage of TiN NEM switches can be lowered by using a harder material with higher melting temperature (for example, Al2O3) as the electrode coating [48]. Configuration of 2T TiN switches with three operation states (one off state and two on states

BN/Ag hybrid nanomaterials with petal-like surfaces as catalysts and antibacterial agents

• Konstantin L. Firestein,
• Denis V. Leybo,
• Alexander E. Steinman,
• Andrey M. Kovalskii,
• Andrei T. Matveev,
• Anton M. Manakhov,
• Irina V. Sukhorukova,
• Pavel V. Slukin,
• Nadezda K. Fursova,
• Sergey G. Ignatov,
• Dmitri V. Golberg and
• Dmitry V. Shtansky

Beilstein J. Nanotechnol. 2018, 9, 250–261, doi:10.3762/bjnano.9.27

• -BN compared with commonly used catalyst supports (i.e., SiO2, Al2O3, etc.). An important question that needs additional analysis is the role of catalyst support morphology. In contrast to the previous works, that were focused on the catalytic activity of 2D BN nanosheets decorated with Ag NPs during