Evaluation of gas-sensing properties of ZnO nanostructures electrochemically doped with Au nanophases

• Elena Dilonardo,
• Michele Penza,
• Marco Alvisi,
• Cinzia Di Franco,
• Francesco Palmisano,
• Luisa Torsi and
• Nicola Cioffi

Beilstein J. Nanotechnol. 2016, 7, 22–31, doi:10.3762/bjnano.7.3

• electron microscopy (TEM, SEM), as well as X-ray photon electron spectroscopy (XPS), revealing the successful decoration of ZnO spherical and rod-like nanostructures, obtained at 300 and 550 °C, respectively, with nano-phase gold at the elemental oxidation state. The main focus of this study is to

• washed with distilled water until complete elimination of chlorine ions in the liquid phase and then dehydrated at 120 °C for 2 h to maintain hydroxy (–OH) groups on the oxide surface, that are ideal to stabilize Au nanoparticles during the electrosynthesis [43][44][45][46]. Electrochemical decoration of

• on ZnO by SAE process was about 1.2–1.5 atom %. In Figure 3A–C the morphological evolution of ZnO structures, dried at 120 °C and annealed at 300 and 550 °C is reported. In particular, the dried ZnO powder, used in the electrochemical decoration process, revealed an amorphous morphology. Furthermore

Calculations of helium separation via uniform pores of stanene-based membranes

• Guoping Gao,
• Yan Jiao,
• Yalong Jiao,
• Fengxian Ma,
• Liangzhi Kou and
• Aijun Du

Beilstein J. Nanotechnol. 2015, 6, 2470–2476, doi:10.3762/bjnano.6.256

• of noble gases is not as good as that of 2D Sn. Therefore, the hydrogen functionalization of 2D Sn results in the degradation of the noble gas permeability due to the steric effect caused by hydrogen decoration. It is expected that the stanene functionalized with fluorine will be a good candidate for

The Kirkendall effect and nanoscience: hollow nanospheres and nanotubes

• Abdel-Aziz El Mel,
• Ryusuke Nakamura and
• Carla Bittencourt

Beilstein J. Nanotechnol. 2015, 6, 1348–1361, doi:10.3762/bjnano.6.139

• can be extended to the fabrication of nanotubes. CdS nanotubes were synthesized by high temperature sulfidation of Cd nanowires prepared by electrochemical step-edge decoration on graphite electrode surfaces. Since the as-grown nanowires were in contact with the surface of the graphite substrate, the

Pt- and Pd-decorated MWCNTs for vapour and gas detection at room temperature

• Hamdi Baccar,
• Atef Thamri,
• Pierrick Clément,
• Eduard Llobet and
• Adnane Abdelghani

Beilstein J. Nanotechnol. 2015, 6, 919–927, doi:10.3762/bjnano.6.95

• Pd nanoparticles. Sputtering allows for an oxygen plasma treatment that removes amorphous carbon from the surface of the carbon nanotubes and creates oxygenated surface defects in which metal nanoparticles nucleate within a few minutes. The decoration with the 2 nm Pt or the 3 nm Pd nanoparticles is

• compounds studied (measured at concentrations up to 50 ppm). Therefore, these sensors could be useful in a small, battery-operated alarm detector, for example, which is able to discriminate aromatic from non-aromatic volatile organic compounds in ambient. Keywords: gas and vapour sensing; metal decoration

• , hydrogen sulphide, ammonia and hydrogen [28]. However, this technique leads to an inhomogeneous decoration of the carbon nanotubes with high irregularities in the shape and size of the metal nanoparticles, which eventually may result in poor sensor reproducibility. Espinosa and co-workers decorated plasma

A versatile strategy towards non-covalent functionalization of graphene by surface-confined supramolecular self-assembly of Janus tectons

• Ping Du,
• David Bléger,
• Fabrice Charra,
• Vincent Bouchiat,
• David Kreher,
• Fabrice Mathevet and
• André-Jean Attias

Beilstein J. Nanotechnol. 2015, 6, 632–639, doi:10.3762/bjnano.6.64

• ) for the precise nanometer-scale 2D decoration of flat sp2-hybridized carbon supports (such as HOPG and graphene) with periodic arrays of functional 3D building blocks, known as Janus tectons [25]. Here, we summarize this general, versatile, and convenient approach for simultaneously (i) generating

Functionalization of α-synuclein fibrils

• Simona Povilonienė,
• Vida Časaitė,
• Virginijus Bukauskas,
• Arūnas Šetkus,
• Juozas Staniulis and
• Rolandas Meškys

Beilstein J. Nanotechnol. 2015, 6, 124–133, doi:10.3762/bjnano.6.12

• fluorophore binds to the target and becomes highly fluorescent [42]. Reches and Gazit also demonstrated the chemical and biological decoration of aromatic dipeptide nanotubes with biotin moiety and avidin [43]. Finally, the functionalization of amyloids with enzymes and other tags that are suitable for the

Synthesis and characterization of fluorescence-labelled silica core-shell and noble metal-decorated ceria nanoparticles

• Rudolf Herrmann,
• Markus Rennhak and
• Armin Reller

Beilstein J. Nanotechnol. 2014, 5, 2413–2423, doi:10.3762/bjnano.5.251

• simplified procedure gave the same particles as the joint addition of AHA and PVP. Thus, our final decoration procedure consists in mixing a dispersion of the ceria NP in water with the noble metal precursor (K2PtCl4, PdCl2, RhCl3) and stirring between room temperature and 70 °C for ca. 20 h. The long

• “decoration” of the surface. If the surface of an agglomerate of 50 nm diameter would be totally covered with platinum NP of 2 nm diameter, 37% of the total weight of the hybrid Pt/CeO2 particle would consist of platinum. In practice, we could not apply more than 8% of platinum without provoking nucleation of

• platinum NP not attached to ceria. Similar observations were made with palladium and rhodium. In the STEM images, however, the contrast difference between cerium and the metal is considerably lower, and EDX mapping is the best way to determine the extent and the distribution of decoration. Figure 8 shows

Sequence-dependent electrical response of ssDNA-decorated carbon nanotube, field-effect transistors to dopamine

• Hari Krishna Salila Vijayalal Mohan,
• Jianing An and
• Lianxi Zheng

Beilstein J. Nanotechnol. 2014, 5, 2113–2121, doi:10.3762/bjnano.5.220

• affinity and specificity of molecular recognition, whereas an electronic route promises faster detection [8][9]. In particular, single-stranded deoxyribonucleic acid (ssDNA) decoration on SWCNT has garnered tremendous attention because of its selectivity and sensitivity towards a wide range of analytes

• surface. The presence of multiple bases allows the design of sequences to achieve affinity to different biological/chemical molecules [13]. Thus, ssDNA decoration on SWCNTs achieves the two-fold goal of surface functionalization and receptor immobilization as it renders the CNT surface responsive and acts

• -decorated, SWCNT-based FETs for sensitive and selective detection of DA. This work is divided into two parts: First, we analyze the effect of ssDNA decoration of SWCNT on the FET response to DA, UA and DA–UA solution mixtures. Second, we interpret the sequence-dependent electrical response of both homo- and

Carbon nano-onions (multi-layer fullerenes): chemistry and applications

• Juergen Bartelmess and
• Silvia Giordani

Beilstein J. Nanotechnol. 2014, 5, 1980–1998, doi:10.3762/bjnano.5.207

• multitude of different synthetic pathways for the covalent surface functionalization has been reported. An alternative to the covalent functionalization is the surface decoration of CNOs with polymers or their incorporation into composites. CNOs have been implemented in different electronic applications, as

Imaging the intracellular degradation of biodegradable polymer nanoparticles

• Anne-Kathrin Barthel,
• Martin Dass,
• Melanie Dröge,
• Jens-Michael Cramer,
• Daniela Baumann,
• Markus Urban,
• Katharina Landfester,
• Volker Mailänder and
• Ingo Lieberwirth

Beilstein J. Nanotechnol. 2014, 5, 1905–1917, doi:10.3762/bjnano.5.201

• decoration quality, pristine magnetite-labeled PLLA nanoparticles were subjected to TEM investigation. Figure 3 shows TEM micrographs of the magnetite-decorated PLLA nanoparticles prepared by either drop casting on a carbon support film and additional carbon evaporation (Figure 3A), or prepared by high

• cap only. Hence, the size distribution is shifted to smaller values (inset of Figure 3B). The maximum diameter of the observed PLLA nanoparticle was found to be about 80 nm. The magnetite decoration of the pristine PLLA does not uniformly cover the surface, but rather tends to show some clustering

• decoration are the source of free magnetite particles within the endosomal cellular compartments. Keep in mind that the magnetite particles are initially covered with a thin layer of PLLA and thus intimately connected to the PLLA. Furthermore, the observation that the mean PLLA NP diameter decreases with

Near-field photochemical and radiation-induced chemical fabrication of nanopatterns of a self-assembled silane monolayer

• Ulrich C. Fischer,
• Carsten Hentschel,
• Florian Fontein,
• Linda Stegemann,
• Christiane Hoeppener,
• Harald Fuchs and
• Stefanie Hoeppener

Beilstein J. Nanotechnol. 2014, 5, 1441–1449, doi:10.3762/bjnano.5.156

• molecules, the nanopatterns could be visualized by AFM topography maps after decoration of the formed patterns with 1.4 nm Au nanoparticles (Figure 4c). The corresponding topographic image of a 1.2 µm APTES SAM pattern reveals periodic triangular shaped structures of 3 nm height in most parts of the image

• exploited to test the resolution potential of the fabrication methods, other methods of bottom-up fabrication of the metal masks are desirable for this purpose. For the fabrication of metal masks as used here the block-copolymer micelle nanolithography [18], the silver decoration technique or other

Highly NO₂ sensitive caesium doped graphene oxide conductometric sensors

• Carlo Piloto,
• Marco Notarianni,
• Mahnaz Shafiei,
• Elena Taran,
• Dilini Galpaya,
• Cheng Yan and
• Nunzio Motta

Beilstein J. Nanotechnol. 2014, 5, 1073–1081, doi:10.3762/bjnano.5.120

• been proven by Yuan et al. [50] that reducing the thickness of the sensing layer below 5 nm results in a significant enhancement of the sensitivity [50]; although other authors claim that very thin layers would result in a not uniform conducting path [18]. The decoration of rGO with Pd nanoparticles

Gas sensing with gold-decorated vertically aligned carbon nanotubes

• Prasantha R. Mudimela,
• Mattia Scardamaglia,
• Oriol González-León,
• Nicolas Reckinger,
• Rony Snyders,
• Eduard Llobet,
• Carla Bittencourt and
• Jean-François Colomer

Beilstein J. Nanotechnol. 2014, 5, 910–918, doi:10.3762/bjnano.5.104

• , regardless of the nanotube length. Keywords: alignment; carbon nanotubes; decoration; gas sensors; metal nanoparticles; thermal CVD; Introduction The interest in gas sensing for reaching a widespread, continuous pollution detection and control has been growing steadily in the last decades due to the

• nanoparticles can be observed only at one of the ends of these aggregates (Figure 5b and 5c), meaning that metal is deposited on the top surface of the forest and not along the entire length of the CNTs. This fact is easily explained by the technique used for the decoration of VA-CNTs by gold nanoparticles, i.e

• analyses were performed in order to evaluate if chemical changes were induced on the CNTs after the gold decoration. Figure 6 shows the XPS survey spectra of CNTs before and after the deposition of gold nanoparticles. On both spectra, the peaks at 284.3 eV and at 533.0 eV, generated by photoelectrons

Resonance of graphene nanoribbons doped with nitrogen and boron: a molecular dynamics study

• Ye Wei,
• Haifei Zhan,
• Kang Xia,
• Wendong Zhang,
• Shengbo Sang and
• Yuantong Gu

Beilstein J. Nanotechnol. 2014, 5, 717–725, doi:10.3762/bjnano.5.84

• synthesised through chemical functionalization with hydroxy and methyl groups or hydrogen [10], the decoration with quantum dots [11], noble metal nanoparticles (NPs) [12], or complex biomolecular structures [13][14]. A number of works have been conducted to investigate the properties of graphene derivatives

Enhanced photocatalytic activity of Ag–ZnO hybrid plasmonic nanostructures prepared by a facile wet chemical method

• Sini Kuriakose,
• Vandana Choudhary,
• Biswarup Satpati and
• Satyabrata Mohapatra

Beilstein J. Nanotechnol. 2014, 5, 639–650, doi:10.3762/bjnano.5.75

• ) have been investigated. Increase in citrate concentration has been found to result in the formation of nanodisk-like structures, due to citrate-assisted oriented attachment of ZnO nanoparticles. The decoration of ZnO nanostructures with Ag nanoparticles resulted in a significant enhancement of the

• photocatalytic degradation of rhodamine B (RhB) and showed that the degradation of RhB over pure Ag nanowires was negligible as compared to ZnO, the degradation efficiency of which further was increased due to the decoration with Ag nanoparticles. Deng et al. [19] fabricated Ag nanoparticles decorated ZnO

• the background, with an energy slit of 8 eV for Zn, 30 eV for O and 2 eV for Ag. The observed EFTEM images confirmed the decoration of ZnO nanostructures with Ag nanoparticles. Optical absorption and photoluminescence The UV–visible absorption spectra of samples with varying Ag concentration are shown

Adsorption of the ionic liquid [BMP][TFSA] on Au(111) and Ag(111): substrate effects on the structure formation investigated by STM

• Benedikt Uhl,
• Florian Buchner,
• Dorothea Alwast,
• Nadja Wagner and
• R. Jürgen Behm

Beilstein J. Nanotechnol. 2013, 4, 903–918, doi:10.3762/bjnano.4.102

Magnetic anisotropy of graphene quantum dots decorated with a ruthenium adatom

• Igor Beljakov,
• Velimir Meded,
• Franz Symalla,
• Karin Fink,
• Sam Shallcross and
• Wolfgang Wenzel

Beilstein J. Nanotechnol. 2013, 4, 441–445, doi:10.3762/bjnano.4.51

• decoration of a graphene sheet by magnetic transition-metal adatoms, utilizing the high in-plane versus out-of-plane magnetic anisotropy energy (MAE), has recently been proposed. This concept is extended in our density-functional-based modeling study by incorporating the influence of the graphene edge on the

• structure of the armchair-graphene (AGQD) and zigzag-graphene (ZGQD) quantum dots in the pristine state, i.e., without decoration by a Ru atom. (The geometric structure may be seen in Figure 1.) While the AGQD has no intrinsic moment, the ZGQD in contrast is found to have an intrinsic moment of 7 μB. This

Functionalization of vertically aligned carbon nanotubes

• Eloise Van Hooijdonk,
• Carla Bittencourt,
• Rony Snyders and
• Jean-François Colomer

Beilstein J. Nanotechnol. 2013, 4, 129–152, doi:10.3762/bjnano.4.14

• functionalization (grafting of functional chemical groups, decoration with metal particles or wrapping of polymers) to bring new properties or to improve the interactions between the VA-CNTs and their environment while maintaining the alignment of CNTs. Keywords: aligned; carbon nanotubes; fluorination

Electronic and transport properties of kinked graphene

• Jesper Toft Rasmussen,
• Tue Gunst,
• Peter Bøggild,
• Antti-Pekka Jauho and
• Mads Brandbyge

Beilstein J. Nanotechnol. 2013, 4, 103–110, doi:10.3762/bjnano.4.12

• bend. This suggests a mechanism in which the hydrogen adsorption is propagating and leads to the decoration of the entire linear bend turning it into a kink line. It may be viewed as analogous to crack-formation mechanisms, where the breaking of a bond increases the stress on neighbouring bonds; only

• , decoration and pinning of the edges of other geometries such as “bubbles” or “blisters” is of interest, e.g., in order to produce GAL-like structures [7] without perforating the graphene sheet. Calculations have shown how the adsorption of hydrogen is correlated over a length scale involving several of the

Directed deposition of silicon nanowires using neopentasilane as precursor and gold as catalyst

• Britta Kämpken,
• Verena Wulf,
• Norbert Auner,
• Marcel Winhold,
• Michael Huth,
• Daniel Rhinow and
• Andreas Terfort

Beilstein J. Nanotechnol. 2012, 3, 535–545, doi:10.3762/bjnano.3.62

• converted to gold films by simple heating in air. Today it is typically applied by screen printing for the decoration of porcelain and glassware [46]. To obtain thin gold films, commercial Screen Printing Brightgold 14603 (Surcotech) was diluted with dichloromethane and spin coated onto the native oxide

Oriented growth of porphyrin-based molecular wires on ionic crystals analysed by nc-AFM

• Thilo Glatzel,
• Lars Zimmerli,
• Shigeki Kawai,
• Ernst Meyer,
• Leslie-Anne Fendt and
• Francois Diederich

Beilstein J. Nanotechnol. 2011, 2, 34–39, doi:10.3762/bjnano.2.4

• an overview nc-AFM image of the molecular assemblies on NaCl(001). The step edges have no specific direction and show no ordered molecular decorations. Regions with steps in directions show similar single-wire decoration as the KBr(001) surface did. Additionally, we observe a large amount of broader