Radiation losses in the microwave K_u band in magneto-electric nanocomposites

• Talwinder Kaur,
• Sachin Kumar,
• Jyoti Sharma and
• A. K. Srivastava

Beilstein J. Nanotechnol. 2015, 6, 1700–1707, doi:10.3762/bjnano.6.173

• ], electrical properties, dielectric properties [25][26], and mechanical properties [27] are better than those of the bulk material. Hexaferrite is also extensively studied by researchers for radiation absorption which is based on magnetic resonance phenomena because of the anisotropy field [10][28]. In this

• hexaferrite alone. This may be due to the electrical properties of polyaniline. Multiple reflections, due to the embedding of ferrite in polyaniline and polarization, because of electron hopping between ferric ions and magnetic losses collectively, increase the reflection loss. For radiation loss measurements

Electrical properties and mechanical stability of anchoring groups for single-molecule electronics

• Riccardo Frisenda,
• Simge Tarkuç,
• Elena Galán,
• Mickael L. Perrin,
• Rienk Eelkema,
• Ferdinand C. Grozema and
• Herre S. J. van der Zant

Beilstein J. Nanotechnol. 2015, 6, 1558–1567, doi:10.3762/bjnano.6.159

• , in order to explore how the nature of the molecule–electrode contact influences the conductance measurements. The electrical properties were studied by measuring the conductance and current–voltage characteristics as a function of electrode distance. A statistical analysis of the I–Vs with a fit to a

Current–voltage characteristics of manganite–titanite perovskite junctions

• Benedikt Ifland,
• Patrick Peretzki,
• Birte Kressdorf,
• Philipp Saring,
• Andreas Kelling,
• Michael Seibt and
• Christian Jooss

Beilstein J. Nanotechnol. 2015, 6, 1467–1484, doi:10.3762/bjnano.6.152

• , mixed halides. The constituents for manganite oxide are: A = rare earth, alkali metal, mixed composition, B = Mn, and X = O. The organic/inorganic halide perovskites exhibit good optical absorption and favorable electrical properties, thus offering the possibility for use in high efficiency solar cells

DNA–melamine hybrid molecules: from self-assembly to nanostructures

• Rina Kumari,
• Shib Shankar Banerjee,
• Anil K. Bhowmick and
• Prolay Das

Beilstein J. Nanotechnol. 2015, 6, 1432–1438, doi:10.3762/bjnano.6.148

• molecules with DNA, in particular, heterocyclic compounds that can offer attractive options to home nitrogen, sulfur or other interesting heteroatoms. Heterocyclic compounds could potentially be used to tune the molecular and electrical properties of a self-assembled system on the nanoscale. Moreover, being

Electron and heat transport in porphyrin-based single-molecule transistors with electro-burnt graphene electrodes

• Hatef Sadeghi,
• Sara Sangtarash and
• Colin J. Lambert

Beilstein J. Nanotechnol. 2015, 6, 1413–1420, doi:10.3762/bjnano.6.146

• nanometre-sized gap. The molecule can be placed in this gap, enabling the study of its electrical properties. Moreover, the ability to place a gate electrode beneath the gap makes this an excellent platform for tuning and studying quantum effects in single-molecule transport. Due to the combustion process

• Green’s function of the electrodes, respectively. GR = (ES−HS−ΣL−ΣR)−1 is the retarded Green’s function, where HS is the Hamiltonian of the scattering region and S is the overlap matrix. Electrical properties: In a similar manner as described in [23], using the obtained transmission coefficient, T(E), the

Electrical characterization of single molecule and Langmuir–Blodgett monomolecular films of a pyridine-terminated oligo(phenylene-ethynylene) derivative

• Henrry M. Osorio,
• Santiago Martín,
• María Carmen López,
• Santiago Marqués-González,
• Simon J. Higgins,
• Richard J. Nichols,
• Paul J. Low and
• Pilar Cea

Beilstein J. Nanotechnol. 2015, 6, 1145–1157, doi:10.3762/bjnano.6.116

• -aggregates. Scanning tunneling microscopy (STM), in particular the “STM touch-to-contact” method, was used to determine the electrical properties of LB films of 1. From these STM studies symmetrical I–V curves were obtained. A junction conductance of 5.17 × 10−5 G0 results from the analysis of the

• molecular junctions [37][38], exciton migration control [39], top-contact metallization [24][40][41], optical and opto-electronic applications [42][43], modulation of the electrical properties of the junction [24], inclusion of a metal atom in the organic structure of a molecular wire [44], and electrical

• synthesis or deployment as a contact group (cf. thioacetate, –SAc, commonly used to prepare thiolate-contacted junctions). These promising features and results from single molecule studies have motivated us to explore the electrical properties of a monomolecular Langmuir–Blodgett film of 1 (Figure 1), and

Observing the morphology of single-layered embedded silicon nanocrystals by using temperature-stable TEM membranes

• Sebastian Gutsch,
• Daniel Hiller,
• Jan Laube,
• Margit Zacharias and
• Christian Kübel

Beilstein J. Nanotechnol. 2015, 6, 964–970, doi:10.3762/bjnano.6.99

• generation photovoltaics [1][2], light emitting diodes [3][4], lasers [5], but are also envisioned to be used as non-volatile memories [6][7][8][9][10]. The optical and electrical properties of ensembles of Si NCs are strongly influenced by the structural properties such as size distribution, separation

Morphology control of zinc oxide films via polysaccharide-mediated, low temperature, chemical bath deposition

• Florian Waltz,
• Hans-Christoph Schwarz,
• Andreas M. Schneider,
• Stefanie Eiden and
• Peter Behrens

Beilstein J. Nanotechnol. 2015, 6, 799–808, doi:10.3762/bjnano.6.83

• during the first CBD step, allow the formation of a more dense ZnO layer during the final CBD. Consequently, as the total material supply is limited, axial growth is diminished, that is, the films become thinner. Electrical properties of the films ZnO is a semiconductor with a direct bandgap of 3.37 eV

• films grown in the first and in the subsequent CBD steps were deduced from cross section SEM micrographs. Electrical properties of ZnO films: comparison of the specific resistance and sheet resistance of ZnO films after the second CBD step. The films were grown with different addition times of HYA

• achieved via doping of ZnO [50][51][52], which is not a topic covered in this work. Here, we use electrical conductivity data as an additional means to judge the quality of the films. In order to obtain reproducible and meaningful results, and to be able to compare the quality of our films, the electrical

Simple approach for the fabrication of PEDOT-coated Si nanowires

• Mingxuan Zhu,
• Marielle Eyraud,
• Judikael Le Rouzo,
• Nadia Ait Ahmed,
• Florence Boulc’h,
• Claude Alfonso,
• Philippe Knauth and
• François Flory

Beilstein J. Nanotechnol. 2015, 6, 640–650, doi:10.3762/bjnano.6.65

• (a conductive, non-electroactive, and easily-polished substrate). This was followed by EDOT oxidation on SiNW substrates. Optical and electrical properties, as well as morphology and composition of the samples, were determined using spectroscopy, current density–voltage curves, scanning electron and

Chains of carbon atoms: A vision or a new nanomaterial?

• Florian Banhart

Beilstein J. Nanotechnol. 2015, 6, 559–569, doi:10.3762/bjnano.6.58

• bonds or only double bonds, lead to a variety of electrical properties, ranging from semiconducting to metallic. Furthermore, the strong covalent σ-bonds raise expectations of exceptional mechanical strength. Producing isolated chains of carbon atoms has remained a challenge for a long time, due to the

• . Calculations are facilitated by the fact that chains consist of typically 10 atoms only and constitute very small systems as compared to two- or three-dimensional nanomaterials. Of high importance, however, is the nature of the contacts at the ends of the chains. The mechanical and electrical properties of

• bandgap. Simulations show that a strain of 10% leads to a bandgap of 1.5–3.0 eV, depending on the approximation (DFT, GW) [19][23]. The electrical properties of chains can only be measured by contacts through single atoms. The bonding characteristics at this particular point are of paramount importance

Filling of carbon nanotubes and nanofibres

• Reece D. Gately and
• Marc in het Panhuis

Beilstein J. Nanotechnol. 2015, 6, 508–516, doi:10.3762/bjnano.6.53

• well known that they can improve the mechanical and electrical properties of various dispersants [121][122][123][124]. However, the properties of the resulting materials prepared from dispersions of TCNSs filled with various materials have not been fully investigated. One interesting application area

Electrical properties of single CdTe nanowires

• Elena Matei,
• Camelia Florica,
• Andreea Costas,
• María Eugenia Toimil-Molares and
• Ionut Enculescu

Beilstein J. Nanotechnol. 2015, 6, 444–450, doi:10.3762/bjnano.6.45

• ]. However, the number of reports dealing with the electrical properties of individual CdTe nanowires are very few. In the present report, in addition to basic characterization regarding morphology, structure and composition determination, the nanowires were connected with electrical contacts by means of a

• combination of lithography and focused ion beam-induced metallization (FIBIM). The electrical properties were determined for individual nanowires prepared under different conditions. Further, the effect of a bottom gate on the charge carriers transported through the nanowire channel was examined. It was also

• found that (similar to other cases of semiconductor nanowires) the surface passivation leads to an improvement in the electrical properties [16][17]. Results and Discussion Electrochemical deposition of CdTe is a process that has been studied over several decades, and is one of the first reports of an

Electrical response of liquid crystal cells doped with multi-walled carbon nanotubes

• Amanda García-García,
• Ricardo Vergaz,
• José F. Algorri,
• Xabier Quintana and
• José M. Otón

Beilstein J. Nanotechnol. 2015, 6, 396–403, doi:10.3762/bjnano.6.39

• nanoparticles. Elongated nanoparticles and nanotubes can be aligned and reoriented by the liquid crystal, inducing noticeable changes in their optical and electrical properties. In this work, cells of liquid crystal doped with high aspect ratio multi-walled carbon nanotubes have been prepared, and their

• outstanding physical properties, CNTs have attracted a great deal of interest during the past 25 years [3][4][5][6]. They are formed from one or several rolled-up graphene sheets. CNTs show peculiar electrical properties: In single-walled carbon nanotubes (SWCNT), the conductivity is either metallic or

Boosting the local anodic oxidation of silicon through carbon nanofiber atomic force microscopy probes

• Gemma Rius,
• Matteo Lorenzoni,
• Soichiro Matsui,
• Masaki Tanemura and
• Francesc Perez-Murano

Beilstein J. Nanotechnol. 2015, 6, 215–222, doi:10.3762/bjnano.6.20

• that the chemical properties of the CNF benefit the generation of a narrower water meniscus, while at the same time maintaining a higher oxidation rate. In this sense, the limited electrical conduction of CNF is not a restrictive point, and the interplay between chemical and electrical properties of

Synthesis of boron nitride nanotubes and their applications

• Saban Kalay,
• Zehra Yilmaz,
• Ozlem Sen,
• Melis Emanet,
• Emine Kazanc and
• Mustafa Çulha

Beilstein J. Nanotechnol. 2015, 6, 84–102, doi:10.3762/bjnano.6.9

• chemical and physical properties. In contrast to CNTs, their electrical properties are not dependent on their chirality and diameter since they have a large band gap of about 5.5 eV. BNNTs also have excellent radiation shielding properties when compared to CNTs [4]. Since the BNNTs are composed of B and N

Characterization of 10,12-pentacosadiynoic acid Langmuir–Blodgett monolayers and their use in metal–insulator–metal tunnel devices

• Saumya Sharma,
• Mohamad Khawaja,
• Manoj K. Ram,
• D. Yogi Goswami and
• Elias Stefanakos

Beilstein J. Nanotechnol. 2014, 5, 2240–2247, doi:10.3762/bjnano.5.233

• –Mg structure was studied by Geddes et al [5]. Mochizuki et al. also explored the use of the LB technique in MIM tunnel diodes by deposition of conductive LB films of bis(ethylenedioxy)tetrathiafulvalene which served as a top electrode [6]. Iwamoto reported on the electrical properties of MIM

Influence of stabilising agents and pH on the size of SnO₂ nanoparticles

• Olga Rac,
• Patrycja Suchorska-Woźniak,
• Marta Fiedot and
• Helena Teterycz

Beilstein J. Nanotechnol. 2014, 5, 2192–2201, doi:10.3762/bjnano.5.228

• of dopants. For this reason, the electrical properties of oxide nanomaterials strongly depend on the kinetics of the processes occurring on its surface, which is extremely important during operation of chemical gas sensors [7][8]. Although the number of publications on the synthesis of oxide

Optical properties and electrical transport of thin films of terbium(III) bis(phthalocyanine) on cobalt

• Peter Robaschik,
• Pablo F. Siles,
• Daniel Bülz,
• Peter Richter,
• Manuel Monecke,
• Michael Fronk,
• Svetlana Klyatskaya,
• Daniel Grimm,
• Oliver G. Schmidt,
• Mario Ruben,
• Dietrich R. T. Zahn and
• Georgeta Salvan

Beilstein J. Nanotechnol. 2014, 5, 2070–2078, doi:10.3762/bjnano.5.215

• -Leopoldshafen, Germany, Université de Strasbourg, Institut de Physique et de Chimie des Materiaux de Strasbourg, CNRS UMP 7504, 23 Rue du Loess, 67034 Strasbourg Cedex 2, France 10.3762/bjnano.5.215 Abstract The optical and electrical properties of terbium(III) bis(phthalocyanine) (TbPc2) films on cobalt

• and the investigated layer stack are schematically shown in Figure 1, which includes a sketch of the molecular orientation which will be discussed later. The present manuscript reveals the optical and electrical properties of TbPc2 films with different thicknesses on Co substrates as well as the

• this work we present the optical, topographic and electrical properties of TbPc2 thin films on cobalt by utilizing ellipsometry and AFM techniques. The ellipsometric studies allowed us to determine the average molecular tilt angle in the TbPc2 films and this evaluation revealed an evolution from nearly

Photodetectors based on carbon nanotubes deposited by using a spray technique on semi-insulating gallium arsenide

• Domenico Melisi,
• Maria Angela Nitti,
• Marco Valentini,
• Antonio Valentini,
• Teresa Ligonzo,
• Giuseppe De Pascali and
• Marianna Ambrico

Beilstein J. Nanotechnol. 2014, 5, 1999–2006, doi:10.3762/bjnano.5.208

• the chemical, mechanical and electrical properties make CNTs also suitable to fabricate a wide range of radiation detectors for space applications, high energy physics and medical instrumentation [7][8][9]. The common technique obtain CNT films is chemical vapour deposition (CVD), but some deposition

Carbon-based smart nanomaterials in biomedicine and neuroengineering

• Antonina M. Monaco and
• Michele Giugliano

Beilstein J. Nanotechnol. 2014, 5, 1849–1863, doi:10.3762/bjnano.5.196

• ], within regenerative applications. Martinelli et al. [62][63] cultured neonatal rat ventricular myocytes on CNTs substrates and measured the active and passive membrane electrical properties of both single myocytes and multinucleated cells by patch-clamp cellular electrophysiology. In both cases, cells

• electrical properties and large surface area, immediately presented themselves as top candidates for the fabrication of a new class of electrodes [107][108][109][110]. Gabay and colleagues [111] developed CNTs-MEAs with improved electrochemical properties by synthesizing “islands” of CNTs on silicon dioxide

• substrates, and confirmed the capability of the device for recording the spontaneous activity of cultured rat cortical neurons. Gabriel and co-workers [112] deposited a solution of SWCNTs onto conventional platinum electrodes of a MEA, thus enhancing the electrical properties of the device and successfully

Silicon and germanium nanocrystals: properties and characterization

• Ivana Capan,
• Alexandra Carvalho and
• José Coutinho

Beilstein J. Nanotechnol. 2014, 5, 1787–1794, doi:10.3762/bjnano.5.189

• communication with the underlying substrate, and therefore largely affect the electrical properties of such structures [24]. Passivation of deep levels caused by the interface is necessary before NC-based optoelectronic devices can become reality. Vacuum annealing, which is used for NC crystallization, is known

• films. Here, significant progress has been made in free-standing Si NC films [22], but much more effort is needed, for instance by using different electrical characterization techniques, to understand the electrical properties of doped and embedded NCs. III Electronic structure models Effective mass

The influence of molecular mobility on the properties of networks of gold nanoparticles and organic ligands

• Edwin J. Devid,
• Paulo N. Martinho,
• M. Venkata Kamalakar,
• Úna Prendergast,
• Christian Kübel,
• Tibebe Lemma,
• Jean-François Dayen,
• Tia. E. Keyes,
• Bernard Doudin,
• Mario Ruben and
• Sense Jan van der Molen

Beilstein J. Nanotechnol. 2014, 5, 1664–1674, doi:10.3762/bjnano.5.177

• electrical properties of the S-BPP networks, which shows a clear deviation from Arrhenius behaviour above 220 K. Hence, our work suggests that the conductance behaviour of molecule–nanoparticle arrays can be tuned as an indicator of dynamical disorder in these structures, which can be a prerequisite to

Growth evolution and phase transition from chalcocite to digenite in nanocrystalline copper sulfide: Morphological, optical and electrical properties

• Priscilla Vasthi Quintana-Ramirez,
• Ma. Concepción Arenas-Arrocena,
• José Santos-Cruz,
• Marina Vega-González,
• Omar Martínez-Alvarez,
• Víctor Manuel Castaño-Meneses,
• Laura Susana Acosta-Torres and
• Javier de la Fuente-Hernández

Beilstein J. Nanotechnol. 2014, 5, 1542–1552, doi:10.3762/bjnano.5.166

• promising p-type inorganic semiconductor for optoelectronic devices such as solar cells, due its small band gap energy and its electrical properties. In this work nanocrystalline copper sulfide (CuxS), with two stoichiometric ratios (x = 2, 1.8) was obtained by one-pot synthesis at 220, 230, 240 and 260 °C

• ]. Electrical properties The CuxS films prepared in aqueous solution are amorphous with undefined morphology. They exhibit a low square electrical resistivity (about 103 Ω/sq) as shown in Figure 6. Chalcocite CuxS from organic solution has a resistance of the order of 105–106 Ω/sq, while crystalline CuxS has a

• nanostructures, and phase transition were completely described in a scheme based on the TEM images. The full phase transition from chalcocite to digenite is obtained at 260 °C in an organic media. It is clear that the optical and electrical properties are suitable for optoelectronic applications, such as solar

Enhanced photocatalytic hydrogen evolution by combining water soluble graphene with cobalt salts

• Jing Wang,
• Ke Feng,
• Hui-Hui Zhang,
• Bin Chen,
• Zhi-Jun Li,
• Qing-Yuan Meng,
• Li-Ping Zhang,
• Chen-Ho Tung and
• Li-Zhu Wu

Beilstein J. Nanotechnol. 2014, 5, 1167–1174, doi:10.3762/bjnano.5.128

• artificial catalyst for photocatalytic hydrogen evolution [23], for example, was simply constructed in situ from earth-abundant cobalt salts and CdTe quantum dots. As a new carbon material with large surface area and excellent electrical properties, graphene has raised much attention since 2004 [24][25][26

Organic and inorganic–organic thin film structures by molecular layer deposition: A review

• Pia Sundberg and
• Maarit Karppinen

Beilstein J. Nanotechnol. 2014, 5, 1104–1136, doi:10.3762/bjnano.5.123

• control of the electrical properties is required for storage capacitors, non-volatile memories as well as for transparent thin-film transistors [18][19]. Moreover, the tunability of the surface roughness is advantageous when fabricating gas sensors [20]. Over the years a number of excellent reviews

• both types of hybrids was approximately 6 Å. The GPC of the DEZ+HDD films was close to the ideal, i.e., 5.2 Å per cycle, whereas the measured GPC for the TiCl4+HDD system reached full mono layer coverage, i.e., 6 Å per cycle. Investigation of the electrical properties of the DEZ+HDD thin films revealed