Imidazolium-based ionic liquids used as additives in the nanolubrication of silicon surfaces

• Patrícia M. Amorim,
• Ana M. Ferraria,
• Rogério Colaço,
• Luís C. Branco and
• Benilde Saramago

Beilstein J. Nanotechnol. 2017, 8, 1961–1971, doi:10.3762/bjnano.8.197

• . Although the use of ionic liquids (ILs) as additives to base oils in the lubrication of steel/steel or other types of metal/ metal tribological pairs has been investigated, the number of studies involving Si is very low. In this work, we tested imidazolium-based ILs as additives to the base oil

• of ceramics. Other investigators followed this idea and added imidazolium-based ILs to base oils to lubricate steel/aluminum contacts [5][6][7] and steel/steel contacts [8][9][10][11][12][13]. Jiménez and Bermúdez [7] tested two ILs with the short alkyl chain imidazolium cation [EMIM], and the anions

• imidazolium-based cations and the anions [BF4], hexafluorophosphate [PF6] and [NTf2] as additives to PEG and polyurea grease in the lubrication of steel/steel pairs, at room temperature and high temperatures. Recently, Pejaković et al. [14] tested several imidazolium sulfate ILs and found significant

Evaluation of preparation methods for suspended nano-objects on substrates for dimensional measurements by atomic force microscopy

• Petra Fiala,
• Daniel Göhler,
• Benno Wessely,
• Michael Stintz,
• Giovanni Mattia Lazzerini and
• Andrew Yacoot

Beilstein J. Nanotechnol. 2017, 8, 1774–1785, doi:10.3762/bjnano.8.179

• preparation methods in which all of precipitated particles are deposited on the substrate, so the estimation is relevant for membrane filtration (if particle size > pore size) and droplet drying. Membrane filtration: The membranes were fixed and flowed off in a filter element (stainless steel 316, diameter 13

Nanotribological behavior of deep cryogenically treated martensitic stainless steel

• Germán Prieto,
• Konstantinos D. Bakoglidis,
• Walter R. Tuckart and
• Esteban Broitman

Beilstein J. Nanotechnol. 2017, 8, 1760–1768, doi:10.3762/bjnano.8.177

• , SE581 83 Linköping, Sweden 10.3762/bjnano.8.177 Abstract Cryogenic treatments are increasingly used to improve the wear resistance of various steel alloys by means of transformation of retained austenite, deformation of virgin martensite and carbide refinement. In this work the nanotribological

• behavior and mechanical properties at the nano-scale of cryogenically and conventionally treated AISI 420 martensitic stainless steel were evaluated. Conventionally treated specimens were subjected to quenching and annealing, while the deep cryogenically treated samples were quenched, soaked in liquid

• cryogenic treatments increased both hardness and elastic limit of a low-carbon martensitic stainless steel, while its tribological performance was enhanced marginally. Keywords: carbide refinement; cryogenic treatments; friction; nanoindentation; nanoscratch; wear-resistance improvement; Introduction AISI

Surface functionalization of 3D-printed plastics via initiated chemical vapor deposition

• Christine Cheng and
• Malancha Gupta

Beilstein J. Nanotechnol. 2017, 8, 1629–1636, doi:10.3762/bjnano.8.162

• ). Monomers were loaded into stainless steel jars and subsequently attached to the reactor chamber. To achieve appropriate monomer vapor pressure, PFDA was heated to 60 °C or 50 °C (for S1-S3, F1-F2, H1-H2), HEMA was heated to 50 °C, and EGDA was heated to 35 °C. TBPO was kept at room temperature of 25 °C and

Luminescent supramolecular hydrogels from a tripeptide and nitrogen-doped carbon nanodots

• Maria C. Cringoli,
• Slavko Kralj,
• Marina Kurbasic,
• Massimo Urban and
• Silvia Marchesan

Beilstein J. Nanotechnol. 2017, 8, 1553–1562, doi:10.3762/bjnano.8.157

• dynamic time sweep rheological analysis was conducted on a Malvern Kinexus Ultra Plus rheometer with a 20 mm stainless steel parallel plate geometry. The temperature was maintained at 25 °C using a Peltier temperature controller. The samples were prepared in situ and immediately analyzed with a gap of

Development of a nitrogen-doped 2D material for tribological applications in the boundary-lubrication regime

• Shende Rashmi Chandrabhan,
• Velayudhanpillai Jayan,
• Somendra Singh Parihar and
• Sundara Ramaprabhu

Beilstein J. Nanotechnol. 2017, 8, 1476–1483, doi:10.3762/bjnano.8.147

• and obtained 17% and 14% reduction in coefficient of friction (COF) and wear scar diameter (WSD), respectively [24]. Berman et al. studied the friction and wear characteristics of 440C steel test pairs lubricated with graphene and found a remarkable reduction in COF (from ca. 1 to ca. 0.15) and wear

• sonicator (Sonics, 500 W). Tribological testing The tribological properties of nanolubricants were studied using a four-ball tester (Magnum Engineers, Bengaluru, India). The test balls are made of chrome steel alloy having a diameter of 12.7 mm according to ANSI standard. The measurements were performed

• concentrations. Variation of COF over time for base oil and nanolubricant with N-rGO (3 mg/L). Wear scar diameter (WSD) of stainless steel balls lubricated with (a) base oil and (b) N-rGO nanolubricant (3 mg/L). Comparison of the measured temperature of base oil and N-rGO (3 mg/L) nanolubricant as a function of

Micro- and nano-surface structures based on vapor-deposited polymers

• Hsien-Yeh Chen

Beilstein J. Nanotechnol. 2017, 8, 1366–1374, doi:10.3762/bjnano.8.138

• ) surface and a poly(4-ethynyl-p-xylylene-co-p-xylylene) surface, respectively. Various substrates were successfully verified for the coating and patterning modifications: metal (silver, titanium, stainless steel), polystyrene (PS), poly(methyl methacrylate) (PMMA), silicon, glass, poly(dimethylsiloxane

Fabrication of hierarchically porous TiO₂ nanofibers by microemulsion electrospinning and their application as anode material for lithium-ion batteries

• Jin Zhang,
• Yibing Cai,
• Xuebin Hou,
• Xiaofei Song,
• Pengfei Lv,
• Huimin Zhou and
• Qufu Wei

Beilstein J. Nanotechnol. 2017, 8, 1297–1306, doi:10.3762/bjnano.8.131

• /w) of 2.25, 1.9 and 1.55 were added slowly under stirring for 12 h to obtain a microemulsion. Preparation of porous TiO2 nanofibers The prepared microemulsion was filled in a 30 mL syringe with a blunt-end stainless steel needle, which had an inside diameter of 0.3 mm. Then the microemulsion was

Oxidative chemical vapor deposition of polyaniline thin films

• Yuriy Y. Smolin,
• Masoud Soroush and
• Kenneth K. S. Lau

Beilstein J. Nanotechnol. 2017, 8, 1266–1276, doi:10.3762/bjnano.8.128

• inert carrier to help transport the oxidant and as a diluent to help control polymerization reactions. The monomer and oxidant are delivered in separate quarter-inch stainless-steel tubes to isolate the reactants prior to entering the reaction chamber and minimize polymerization and blockage in the gas

Preparation of thick silica coatings on carbon fibers with fine-structured silica nanotubes induced by a self-assembly process

• Benjamin Baumgärtner,
• Hendrik Möller,
• Thomas Neumann and
• Dirk Volkmer

Beilstein J. Nanotechnol. 2017, 8, 1145–1155, doi:10.3762/bjnano.8.116

• attractive substrate. However, an exhaustive coating can be easily achieved for fibers consisting of silicon carbide, aramid, steel, glass and basalt (Supporting Information File 1, Figure S10). Conclusion A site-selective biomimetic silica deposition was accomplished via immobilization of linear polyamines

Hierarchically structured nanoporous carbon tubes for high pressure carbon dioxide adsorption

• Julia Patzsch,
• Deepu J. Babu and
• Jörg J. Schneider

Beilstein J. Nanotechnol. 2017, 8, 1135–1144, doi:10.3762/bjnano.8.115

• fibres (1) In a similar manner as described in [38], electrospinning was performed in a homebuilt apparatus. Polystyrene (PS) fibres were electrospun from a 16 wt % PS THF/DMF 3:2 solution. After aging the spinning solution overnight, it was loaded into a glass syringe equipped with a stainless-steel

• the range 0–3 bar, 0–30 bar and 0–100 bar with an accuracy of 0.05% of the maximum pressure rating. The all stainless steel construction was made from Swagelok® tubes and fittings. A water bath was used for maintaining isothermal conditions and K-type thermocouples monitored the gas temperature in the

Treatment of fly ash from power plants using thermal plasma

• Sulaiman Al-Mayman,
• Ibrahim AlShunaifi,
• Abdullah Albeladi,
• Imed Ghiloufi and
• Saud Binjuwair

Beilstein J. Nanotechnol. 2017, 8, 1043–1048, doi:10.3762/bjnano.8.105

• the product and a glass frit (to increase the mass of Si in the product). The water-cooled stainless steel crucible is set just under the coupling zone of the plasma torches. During the experiments reported here, the current intensity is 100 A and the voltage is 220 V. In this step an inert gas (argon

Study of the correlation between sensing performance and surface morphology of inkjet-printed aqueous graphene-based chemiresistors for NO₂ detection

• F. Villani,
• C. Schiattarella,
• T. Polichetti,
• R. Di Capua,
• F. Loffredo,
• B. Alfano,
• M. L. Miglietta,
• E. Massera,
• L. Verdoliva and
• G. Di Francia

Beilstein J. Nanotechnol. 2017, 8, 1023–1031, doi:10.3762/bjnano.8.103

• 15 min for removing the residual solvent. Sensing analysis Tests for sensing measurements upon NO2 have been performed in the gas sensor characterization system (GSCS, Kenosistec equipment) equipped with a stainless steel chamber placed in a thermostatic box, keeping constant the temperature (T = 22

CVD transfer-free graphene for sensing applications

• Chiara Schiattarella,
• Sten Vollebregt,
• Tiziana Polichetti,
• Brigida Alfano,
• Ettore Massera,
• Maria Lucia Miglietta,
• Girolamo Di Francia and
• Pasqualina Maria Sarro

Beilstein J. Nanotechnol. 2017, 8, 1015–1022, doi:10.3762/bjnano.8.102

• different points of the sensing strips by means of Renishaw InVia Reflex spectrometer, at λ = 514 nm and 20 mW incident laser power, in backscattering configuration. The chemiresistors have been tested in a Gas Sensor Characterization System (GSCS, Kenosistec equipment) consisting of a stainless steel

3D Nanoprinting via laser-assisted electron beam induced deposition: growth kinetics, enhanced purity, and electrical resistivity

• Brett B. Lewis,
• Robert Winkler,
• Xiahan Sang,
• Pushpa R. Pudasaini,
• Michael G. Stanford,
• Harald Plank,
• Raymond R. Unocic,
• Jason D. Fowlkes and
• Philip D. Rack

Beilstein J. Nanotechnol. 2017, 8, 801–812, doi:10.3762/bjnano.8.83

• sufficient to initiate carbon removal without inducing significant thermal drift and/or laser chemical vapor deposition (CVD). Laser pulses are delivered to the sample with an optical working distance of 9 mm using a multi-mode 100 µm diameter fiber optic cable housed within a stainless steel shaft with

Vapor deposition routes to conformal polymer thin films

• Priya Moni,
• Ahmed Al-Obeidi and
• Karen K. Gleason

Beilstein J. Nanotechnol. 2017, 8, 723–735, doi:10.3762/bjnano.8.76

• ], copyright 2011 American Chemical Society. SEM images of iCVD pEGDA on micro-trenches with aspect ratios of a) 1.4 b) 3.5, c) 5.5 and d) 8.4. e) Cross-sectional SEM of 25 µm stainless-steel wire with 16 µm fluoropolymer coating formed via iCVD. f) iCVD pDMAMS on nylon fiber ion beam ablated to reveal

Carbon nanotube-wrapped Fe₂O₃ anode with improved performance for lithium-ion batteries

• Guoliang Gao,
• Yan Jin,
• Qun Zeng,
• Deyu Wang and
• Cai Shen

Beilstein J. Nanotechnol. 2017, 8, 649–656, doi:10.3762/bjnano.8.69

• aforementioned solution was added to 16.67 mL aqueous solution of 2 mg/mL short carboxyl of multi-walled carbon nanotubes (COOH-MWCNT Aladdin Corp). The mixture was magnetically stirred for 12 h. Finally, the mixture was transferred into teflon-lined stainless steel autoclave, and kept at 150 °C for 24 h. The

Diffusion and surface alloying of gradient nanostructured metals

• Zhenbo Wang and
• Ke Lu

Beilstein J. Nanotechnol. 2017, 8, 547–560, doi:10.3762/bjnano.8.59

• the diffusion activation enthalpy is slightly lower than that that of GB diffusion. In addition, the Cr-diffusion depth values were determined in GNS low carbon steel samples chromized in a packed powder mixture of Cr–NH4Cl–Al2O3, as shown in Figure 2 [32]. One can see that the diffusion depth into

• observed in a GNS H13 steel sample, in which a significantly increased Cr-diffusion depth with respect to that in the CG sample was achieved at chromizing temperatures below 600 °C, and the depth even decreased with increasing temperatures above 600 °C [33]. Meanwhile, it was noticed that an isothermal

• preannealing might decrease the Cr-diffusion depth. For example, the pre-annealing at 400 °C decreased the Cr-diffusion depth values to ≈60% of the as-prepared GNS low carbon steel (also see Figure 2). Since the surface Cr concentration is approximately constant during chromizing, the apparent diffusivity in

Colorimetric gas detection by the varying thickness of a thin film of ultrasmall PTSA-coated TiO₂ nanoparticles on a Si substrate

• Urmas Joost,
• Andris Šutka,
• Meeri Visnapuu,
• Aile Tamm,
• Meeri Lembinen,
• Mikk Antsov,
• Kathriin Utt,
• Krisjanis Smits,
• Ergo Nõmmiste and
• Vambola Kisand

Beilstein J. Nanotechnol. 2017, 8, 229–236, doi:10.3762/bjnano.8.25

• mode was utilized in order to provide an optimal performance. OTESPA AFM tips (manufactured by Bruker) were used. To measure thickness of films, they were scratched with stainless steel tweezers and the step height of the scratch was measured. To ensure that only the film was scratched away (and not

Fundamental properties of high-quality carbon nanofoam: from low to high density

• Natalie Frese,
• Shelby Taylor Mitchell,
• Christof Neumann,
• Amanda Bowers,
• Armin Gölzhäuser and
• Klaus Sattler

Beilstein J. Nanotechnol. 2016, 7, 2065–2073, doi:10.3762/bjnano.7.197

• spectra are different for the two types of foams. We discuss the foams assuming a 3D-graphene-type network with open cavities forming the micropearl structures. Experimental Hydrothermal reactor Two stainless steel autoclaves, each with a volume of 130 mL, were used for these studies; a setup which is

Effect of nanostructured carbon coatings on the electrochemical performance of Li_1.4Ni_0.5Mn_0.5O_2+x-based cathode materials

• Konstantin A. Kurilenko,
• Oleg A. Shlyakhtin,
• Oleg A. Brylev,
• Dmitry I. Petukhov and
• Alexey V. Garshev

Beilstein J. Nanotechnol. 2016, 7, 1960–1970, doi:10.3762/bjnano.7.187

• stainless steel net (0.05 mm thick). After pressing, the electrodes were dried in vacuum (0.5–1.0 mbar) at 120 °C for 8 h. The active electrode, counter electrode (Li) and reference electrode (Li) were placed in a hermetic Teflon cell using a porous polypropylene separator. 1 M LiPF6 solution in ethylene

A new approach to grain boundary engineering for nanocrystalline materials

• Shigeaki Kobayashi,
• Sadahiro Tsurekawa and
• Tadao Watanabe

Beilstein J. Nanotechnol. 2016, 7, 1829–1849, doi:10.3762/bjnano.7.176

• nanocrystalline and ordinary polycrystalline materials [24][25]. More recently, Raabe et al. [27][28] proposed grain boundary segregation engineering for improvement of material properties, such as the stabilization of grains in nanocrystalline steel by carbon and solute element segregation. Kalidindi et al. [29

• the corresponding fractal trace of MRBC determined for a SUS316L austenitic stainless steel specimens [122]. The whole observed area is covered by the square box net with a given unit size, η. Figure 11 shows the double-logarithm plots of the number of boxes N(η) for complete coverage of the MRBC and

• steel specimens is of fractal nature. The fractal dimensions DR evaluated by the slope of the log N(η) versus log η were found to change systematically from 1.07 to 1.67 for the studied SUS316L steel specimens. Namely, the fractal dimensions show a reasonable correlation with the total length of random

3D printing of mineral–polymer bone substitutes based on sodium alginate and calcium phosphate

• Aleksey A. Egorov,
• Alexander Yu. Fedotov,
• Anton V. Mironov,
• Vladimir S. Komlev,
• Vladimir K. Popov and
• Yury V. Zobkov

Beilstein J. Nanotechnol. 2016, 7, 1794–1799, doi:10.3762/bjnano.7.172

• KBr powder followed by compacting into a thin pellet in a stainless steel die with a 1 cm inner diameter. FTIR data were recorded over the range of 4000–400 cm−1 with 128 scans. As described in [17] the compressive strength of the samples was evaluated in accordance with the ISO standard 83.100

Prediction of the mechanical properties of zeolite pellets for aerospace molecular decontamination applications

• Guillaume Rioland,
• Patrick Dutournié,
• Delphine Faye,
• T. Jean Daou and
• Joël Patarin

Beilstein J. Nanotechnol. 2016, 7, 1761–1771, doi:10.3762/bjnano.7.169

• -lined stainless-steel autoclaves and heated at 150 °C for 2 days. After synthesis the product was filtered, washed with deionized water several times and dried overnight at 100 °C. The organic compounds were finally removed by calcination at 550 °C for 8 h in air (ramp at 1 °C·min−1). Methylcellulose

Role of RGO support and irradiation source on the photocatalytic activity of CdS–ZnO semiconductor nanostructures

• Suneel Kumar,
• Rahul Sharma,
• Vipul Sharma,
• Gurunarayanan Harith,
• Vaidyanathan Sivakumar and
• Venkata Krishnan

Beilstein J. Nanotechnol. 2016, 7, 1684–1697, doi:10.3762/bjnano.7.161

• dropwise under vigorous stirring. This was followed by ultrasonic treatment of the solution for 30 min for homogenization. Then, this homogenous solution was transferred to a 100 mL teflon-lined stainless steel autoclave, sealed tightly and maintained at 180 °C for 12 h. White precipitates of ZnO NR were

• . Finally, Cd(OOCCH3)2·2H2O (0.2 M) and 4 mL of thioglycolic acid (0.2 M) was added into 40 mL of above solution under vigorous stirring. Subsequently, this homogenous suspension was transferred to 50 mL teflon-lined stainless steel autoclave and kept at 140 °C for 48 h. After the completion of reaction

• achieved, the suspension is transferred to teflon-lined stainless steel autoclave and kept at 120 °C for 24 h. The desired product was obtained after washing with water and dried at 60 °C. Based on the molar ratio of the precursors used in the synthesis, the ratio of CdS to ZnO is expected to be 1:1 while