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Search for "ultrasonic" in Full Text gives 222 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.
Optical properties and electrical transport of thin films of terbium(III) bis(phthalocyanine) on cobalt
Beilstein J. Nanotechnol. 2014, 5, 2070–2078, doi:10.3762/bjnano.5.215
- conditions (10−8 mbar). The substrates were cleaned in acetone and ethanol for 5 minutes each in an ultrasonic bath. On top of the cobalt, the TbPc2 films were prepared by organic molecular beam deposition at a rate of 0.5 nm/min at a pressure below 10−7 mbar. The evaporation took place at a temperature of
Photodetectors based on carbon nanotubes deposited by using a spray technique on semi-insulating gallium arsenide
Beilstein J. Nanotechnol. 2014, 5, 1999–2006, doi:10.3762/bjnano.5.208
- 10 and 30 nm. The procedure for the preparation of the solution is reported elsewhere [7]. The only difference is that an ultrasonic atomizer NS60K50-Sonaer 60 kHz system has been used in place of an airbrush, in order to obtain a better film uniformity. Due to the low deposition temperature (60 °C
- image of the two device layouts used: single face sample (SFS) and double face sample (DFS). TEM micrographs of CNTs dispersion spray obtained by means of: the ultrasonic atomizer a); the airbrush b). Scale bars: 100 nm. SEM image of the MWCNT film on a semi-insulating gallium arsenide substrate. Dark
High speed e-beam lithography for gold nanoarray fabrication and use in nanotechnology
Beilstein J. Nanotechnol. 2014, 5, 1918–1925, doi:10.3762/bjnano.5.202
- surfaces and nanodots to 1 mM solution of 11-ferrocenyl-1-undecanethiol (from Aldrich) in 80% ethanol (VLSI grade from Carlo Erba) 20% dichloromethane during 24 h in a glovebox in the darkness. Then, we rinsed the treated substrates with ethanol followed by a cleaning in an ultrasonic bath of chloroform
Synthesis of Pt nanoparticles and their burrowing into Si due to synergistic effects of ion beam energy losses
Beilstein J. Nanotechnol. 2014, 5, 1864–1872, doi:10.3762/bjnano.5.197
- samples. Before taking the spectra, an energy calibration was performed using the Au and Si edges (reference sample: Au deposited on the glass). For HRXTEM analysis, the sample was cut in 4 × 5 mm pieces using an ultrasonic disc cutter. These pieces were glued together (face-to-face and face-to-back) to
- form a cross. A 2.3 mm-diameter piece was drilled out (along the cross section) using an ultrasonic cutter. This piece was fixed (using epoxy) in a 3 mm-diameter brass tube. Thin slices were cut from this tube for mechanical thinning up to 100 µm. Then, the center of the slice was dimpled to achieve 20
Experimental techniques for the characterization of carbon nanoparticles – a brief overview
Beilstein J. Nanotechnol. 2014, 5, 1760–1766, doi:10.3762/bjnano.5.186
- nanoparticles and allow for observation of the changes in the quasi-graphitic ordering induced by ultrasonic irradiation and with the so-called quasi-high pressure effect under adsorption conditions. Structural changes have strong influence on the electronic properties, especially the localization of charge
- graphite were treated with ultrasonic irradiation [16]. This procedure results in the development of an internal strain which generates the stacking fault by shifting the layers laterally as well as increasing the distance between them. The in-plane coherence length and the degree of three dimensional
- crystal, especially along the crystallographic c direction perpendicular to the graphene layers. Translation of these layers is the mechanical consequence of ultrasonic radiation. An accurate analysis reveals the presence of a set of extra peaks whose positions suggest the occurrence of a rhombohedral
Precise quantification of silica and ceria nanoparticle uptake revealed by 3D fluorescence microscopy
Beilstein J. Nanotechnol. 2014, 5, 1616–1624, doi:10.3762/bjnano.5.173
- light scattering) were measured in ultrapure water and in cell medium (see section ‘Cell culture’ for details) with a Zetasizer Nano (Malvern Instruments, UK). In order to break down agglomerates, the resulting solution was vortexed for 10 s, treated in an ultrasonic bath for 10 min and vortexed again
- growth. Before addition to cells, the solution was vortexed for 10 s, treated in an ultrasonic bath for 10 min and vortexed again for 10 s. After the incubation time, and just before measurements, the cell membrane was stained with a solution of 10 µg·mL−1 wheat germ agglutinin, Alexa Fluor® 488 (Life
A sonochemical approach to the direct surface functionalization of superparamagnetic iron oxide nanoparticles with (3-aminopropyl)triethoxysilane
Beilstein J. Nanotechnol. 2014, 5, 1472–1476, doi:10.3762/bjnano.5.160
- synthesized in an ice bath for heat dissipation. The colloidal suspension of SPION was initially dispersed for 2 min by using a Vibra-Cell ultrasonic horn. Subsequently, APTES was then added and the mixture was further sonicated for 20 min. The resulting product was left overnight and then separated with
- magnets (1.5 T, for details see Supporting Information File 1). The ultrasonic irradiation of the mixture causes the formation, growth and collapse of bubbles (acoustic cavitation process) within the liquid content. These bubbles behave as individual microreactors as they are often accompanied by a
Near-field photochemical and radiation-induced chemical fabrication of nanopatterns of a self-assembled silane monolayer
Beilstein J. Nanotechnol. 2014, 5, 1441–1449, doi:10.3762/bjnano.5.156
- and water in an ultrasonic bath. Exposure conditions In process 1 an area of about 1 mm2 of the sandwich structure was exposed to light of a 75 W high pressure Xenon arc lamp for 1 h in an epi-fluorescence microscope by using an objective lens of a NA of 0.5. According to the absorption peak of the
- fluorescein dye at around 496 nm a bandpass filter around 480 nm was used to define the spectral region of the excitation source. After exposure and removal of the mask the sample was cleaned in an ultrasonic water bath and thoroughly rinsed with water. For process 2 a sandwich of mask 2 and an APTES SAM was
Purification of ethanol for highly sensitive self-assembly experiments
Beilstein J. Nanotechnol. 2014, 5, 1254–1260, doi:10.3762/bjnano.5.139
- at 343–363 K and then heated to 723 K for 2.5 h in a tube furnace in N2 stream. Characterization of zeolite-supported gold NPs by STEM and EDX For transmission electron microscopy (TEM) investigations, samples of the zeolite-supported gold NPs were dispersed in ethanol using an ultrasonic bath
Topology assisted self-organization of colloidal nanoparticles: application to 2D large-scale nanomastering
Beilstein J. Nanotechnol. 2014, 5, 1203–1209, doi:10.3762/bjnano.5.132
- pitch varied between 5 to 20 times the diameters of the beads (Figure 1). Self-organization of PS beads on patterned silicon substrate PS beads were deposited on the silicon patterned substrates by a convective self-assembly technique. Figure 1 shows a schematic of the entire process. The ultrasonic
Nanodiamond-DGEA peptide conjugates for enhanced delivery of doxorubicin to prostate cancer
Beilstein J. Nanotechnol. 2014, 5, 937–945, doi:10.3762/bjnano.5.107
- water using an ultrasonic water bath. Then, 400 µL activation buffer were added to the ND-DGEA suspension and the mixture was continuously mixed for 30 min. 500 µL of DOX (1 mg/mL) was added, and the mixture was continuously mixed for an additional hour. Last, 400 µL of the pH 8.5 coupling buffer was
Integration of ZnO and CuO nanowires into a thermoelectric module
Beilstein J. Nanotechnol. 2014, 5, 927–936, doi:10.3762/bjnano.5.106
- powder source) to avoid undesired condensation over the substrate. High-purity alumina substrates (20 mm × 20 mm, Kyocera, Japan) have been used as target substrate for both morphological and electrical investigations. Substrates have been cleaned in acetone using ultrasonic bath for 10 min and then
- alumina substrates [24]. Samples have been first cleaned in acetone using ultrasonic bath for 10 min and then dried with synthetic air. Then, a thin layer of metallic Cu has been deposited on samples by RF magnetron sputtering (50 W Ar plasma at room temperature, pressure 5 × 10−3 mbar, thickness 1 μm
Antimicrobial nanospheres thin coatings prepared by advanced pulsed laser technique
Beilstein J. Nanotechnol. 2014, 5, 872–880, doi:10.3762/bjnano.5.99
- biological assays. Prior to placing the substrates inside the deposition chamber, they were cleaned in an ultrasonic bath with acetone, ethanol and deionized water for 15 min, and then dried in a jet of high purity nitrogen. Characterization Transmision electron microscopy The transmission electron
Enhancement of photocatalytic H2 evolution of eosin Y-sensitized reduced graphene oxide through a simple photoreaction
Beilstein J. Nanotechnol. 2014, 5, 801–811, doi:10.3762/bjnano.5.92
- with 5% HCl and water until pH 5 and dried in an oven at 60 °C. 0.5 g of graphite oxide powder was added into 1 L of distilled water, and the dispersion was treated with ultrasound (KQ-800KDB, KunShan Ultrasonic Instrument Co. Ltd) for 2 h until the solution became clear to obtain a graphene oxide (GO
Antimicrobial properties of CuO nanorods and multi-armed nanoparticles against B. anthracis vegetative cells and endospores
Beilstein J. Nanotechnol. 2014, 5, 789–800, doi:10.3762/bjnano.5.91
- incubator shaker bath at 150 rpm and ultrasonic cleaning bath (Spectralab, India). It was expected that accelerated mixing in ultrasonic bath would lead to higher mechanical damage to cells in test suspension carrying bacterial cells and CuO NPs due to an increased frequency of collisions between the two
- (P5) against B. anthracis vegetative cells at 2mg/mL of P5 in saline – under sonication in ultrasonic bath or shaking at 150 rpm in an incubator shaker (at 35 °C). Antibacterial activity of multi-armed copper oxide nanoparticles (P5) and CuO nanorods (PS2) against B. anthracis spores with 10 mg/mL of
Carbon dioxide hydrogenation to aromatic hydrocarbons by using an iron/iron oxide nanocatalyst
Beilstein J. Nanotechnol. 2014, 5, 760–769, doi:10.3762/bjnano.5.88
- by suspending the catalyst in ethanol and agitating in an ultrasonic bath for 15 min. A catalyst sample (10 µL) was placed onto copper mesh grid with lacey carbon film. The wet grids were allowed to air-dry for several minutes prior to being examined under TEM. The catalyst particle size and
Nanostructure sensitization of transition metal oxides for visible-light photocatalysis
Beilstein J. Nanotechnol. 2014, 5, 696–710, doi:10.3762/bjnano.5.82
- resistance to photobleaching. Up to now, many methods [112][113][114][115][116][117][118][119][120][121][122][123][124][125][126][127] are available for the fabrication of carbon nanodots, for instance, the electrochemical method, the microwave method, the ultrasonic method, the hydrothermal method. Due to
Enhanced photocatalytic activity of Ag–ZnO hybrid plasmonic nanostructures prepared by a facile wet chemical method
Beilstein J. Nanotechnol. 2014, 5, 639–650, doi:10.3762/bjnano.5.75
- ., and a post-column Imaging Filter (Quantum SE, Model 963) from Gatan Inc. The sample was dispersed in ethanol by using an ultrasonic bath, mounted on a carbon coated Cu grid, dried, and used for TEM measurements. The optical properties of the samples were studied by UV–visible absorption spectroscopy
Towards precise defect control in layered oxide structures by using oxide molecular beam epitaxy
Beilstein J. Nanotechnol. 2014, 5, 596–602, doi:10.3762/bjnano.5.70
- -layer growth mode is achieved. The STO substrate was TiO2 terminated by etching in buffered HF acid and a following annealing at 950 °C in oxygen flow. The LSAO substrate was simply cleaned in an ultrasonic bath with aceton and following isopropanol without special treatment for surface termination
Hole-mask colloidal nanolithography combined with tilted-angle-rotation evaporation: A versatile method for fabrication of low-cost and large-area complex plasmonic nanostructures and metamaterials
Beilstein J. Nanotechnol. 2014, 5, 577–586, doi:10.3762/bjnano.5.68
- steps are described. The videos can be found at the website of Beilstein TV [24][25]. Experimental Hole-mask fabrication Before the mask fabrication, all substrates are cleaned with acetone and isopropanol in an ultrasonic bath for about 5 min, respectively, and then dried with nitrogen gas. In addition
- sample (see Figure 1c), as an oxygen plasma resistant layer, and the PS spheres are removed by using deionized water and an ultrasonic bath (90 W, 20 min). Finally, we treat the sample again with the oxygen plasma for an isotropic etching to create extended holes in the PMMA layer (for 230 nm PMMA 11.2
- adhesive tape. In order to eliminate residues the sample is then immersed into an acetone solution and treated in an ultrasonic bath for about 1 min. Some sensing applications, e.g., SEIRA, require further cleaning which can be realized by oxygen plasma etching (10 to 15 min). Details on mask preparation
An ultrasonic technology for production of antibacterial nanomaterials and their coating on textiles
Beilstein J. Nanotechnol. 2014, 5, 532–536, doi:10.3762/bjnano.5.62
- , Israel 10.3762/bjnano.5.62 Abstract A method for the production of antibacterial ZnO nanoparticles has been developed. The technique combines passing an electric current with simultaneous application of ultrasonic waves. By using high-power ultrasound a cavitation zone is created between two zinc
- is transported to a specially developed ultrasonic reactor, in which the nanoparticles are deposited on the textile. The nanoparticles are embedded into the fibres by the cavitation jets, which are formed by asymmetrically collapsing bubbles in the presence of a solid surface and are directed towards
- two Zn electrodes in water. Preliminary experiments have shown that if ultrasonic vibrations are applied to an electrode while an arc discharge is created in polar fluids a new form of an electrical discharge, a spatial sonoplasma discharge, is formed [4][5]. It is a form of a quasi-spatial discharge
Preparation of poly(N-vinylpyrrolidone)-stabilized ZnO colloid nanoparticles
Beilstein J. Nanotechnol. 2014, 5, 402–406, doi:10.3762/bjnano.5.47
- stirring at room temperature and the ZnO solution was added to set various ratios of Zn:PVP (from 1:0.1 to 1:0.5 wt %). The prepared mixture was put into an Erlenmeyer flask and heated to 60 °C for 4 h under continuous stirring in an ultrasonic bath. In order to remove impurities from the white powder, it
Frequency, amplitude, and phase measurements in contact resonance atomic force microscopies
Beilstein J. Nanotechnol. 2014, 5, 278–288, doi:10.3762/bjnano.5.30
- excitation either at the base of the cantilever (in the so-called ultrasonic atomic force microscopy (UAFM) configuration [4]) or to the sample stage (in the AFAM configuration [3]). In both cases, the effective resonance frequency, amplitude, and phase of various eigenmodes of the cantilever–tip system are
En route to controlled catalytic CVD synthesis of densely packed and vertically aligned nitrogen-doped carbon nanotube arrays
Beilstein J. Nanotechnol. 2014, 5, 219–233, doi:10.3762/bjnano.5.24
- during the TEM sample preparation in the ultrasonic bath left a wedge shaped cavity at the nanotube end. This behavior has never been observed for MWCNTs. A summary of representative and dominating nanotube morphologies from Synthesis VII and Synthesis VIII with the corresponding models is presented in
Photovoltaic properties of ZnO nanorods/p-type Si heterojunction structures
Beilstein J. Nanotechnol. 2014, 5, 173–179, doi:10.3762/bjnano.5.17
- . Experimental In this work, we investigate n-type ZnO/p-type Si heterostructures. P-type (100) silicon wafer with a resistance of 2.32 Ω cm was cut into pieces of the size of 0.5 cm2. Cut silicon pieces were cleaned in 2-propanol, acetone and deionized water for 5 minutes by using an ultrasonic cleaner. Then
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