Scavenging of reactive oxygen species by phenolic compound-modified maghemite nanoparticles

• Małgorzata Świętek,
• Yi-Chin Lu,
• Rafał Konefał,
• Liliana P. Ferreira,
• M. Margarida Cruz,
• Yunn-Hwa Ma and
• Daniel Horák

Beilstein J. Nanotechnol. 2019, 10, 1073–1088, doi:10.3762/bjnano.10.108

• modified with polymers via a layer-by-layer (LbL) technique [17]. Two naturally derived polymers, namely, anionic heparin and cationic chitosan, were used as nanoparticle coatings, and three phenolic compounds, including hydroquinone, phloroglucinol, and gallic acid, differing in the number of hydroxy

• temperature and magnetic field showed a typical superparamagnetic behavior of the γ-Fe2O3 nanoparticles with a saturation magnetization of 0.307 A∙m2·kg−1 at 260 K. The similarity of the magnetic hysteresis and ZF-C/F-C curves of the neat and modified nanoparticles indicated that the coatings did not affect

Tailoring the stability/aggregation of one-dimensional TiO₂(B)/titanate nanowires using surfactants

• Atiđa Selmani,
• Johannes Lützenkirchen,
• Kristina Kučanda,
• Dario Dabić,
• Engelbert Redel,
• Ida Delač Marion,
• Damir Kralj,
• Darija Domazet Jurašin and
• Maja Dutour Sikirić

Beilstein J. Nanotechnol. 2019, 10, 1024–1037, doi:10.3762/bjnano.10.103

• other titanium oxide nanostructures [14][16]. It has been previously shown that various types of surface coatings affect NM properties, and in particular, can improve their stability and biocompatibility [13][17][18][19]. Although much is known about the aggregation of spherical TNMs in different media

Polydopamine-coated Au nanorods for targeted fluorescent cell imaging and photothermal therapy

• Boris N. Khlebtsov,
• Andrey M. Burov,
• Timofey E. Pylaev and
• Nikolai G. Khlebtsov

Beilstein J. Nanotechnol. 2019, 10, 794–803, doi:10.3762/bjnano.10.79

• tunable shell thickness. The most popular coatings such as mesoporous silica, PEG and polyelectrolyte shells do not meet the above quality criteria. In 2007 Messersmith et al. reported the mussel-inspired adhesive polydopamine (PDA) multifunctional coating for various materials including nanoparticles [25

• provides additional potential advantages for in vivo experiments as compared to other inorganic coatings such as silica shells. It is well known [46] that the adsorption of fluorescent dyes on Au nanoparticles can induce quenching of their emission. However, in the AuNRs-PDA-R123-folate, the PDA layer

• M CTAB solution. AuNRs were allowed to grow overnight without stirring at 30 °C. For further PDA coatings the prepared nanorods were PEGylated using the procedure described in [53]. Polydopamine coating of AuNRs PDA shells were grown on the surface of PEGylated nanorods. To this end AuNRs were

Towards rare-earth-free white light-emitting diode devices based on the combination of dicyanomethylene and pyranine as organic dyes supported on zinc single-layered hydroxide

• Jeff L. Nyalosaso,
• Rachod Boonsin,
• Pierre Vialat,
• Damien Boyer,
• Geneviève Chadeyron,
• Rachid Mahiou and
• Fabrice Leroux

Beilstein J. Nanotechnol. 2019, 10, 760–770, doi:10.3762/bjnano.10.75

• large part of the visible spectrum. The concept developed in our work consisted in keeping SLH in its wet form to ensure a good dispersion of the fluorescent dyes prior to immobilizing the hybrid materials in a silicone polymer to achieve luminescent composite films. We demonstrate that these coatings

Ultrathin hydrophobic films based on the metal organic framework UiO-66-COOH(Zr)

• Miguel A. Andrés,
• Clemence Sicard,
• Christian Serre,
• Olivier Roubeau and
• Ignacio Gascón

Beilstein J. Nanotechnol. 2019, 10, 654–665, doi:10.3762/bjnano.10.65

• ][35]. Superhydrophobic MOFs could be of interest for a great variety of technological applications, including coatings, paints and fabrics [36]. Moreover, it has been shown [37] that these materials could be used as catalysts and in gas separation under humid conditions. In this contribution, mixed

• of LB films were higher due to the low deposition of MOF (2 µg for the LB film and ≈6 µg for the drop-cast sample). Ultrathin hydrophobic coatings To study the hydrophobic character of LB, LS and RLS films, water contact angle (WCA) values were measured on glass and mica substrates before and after

• highly hydrophilic substrate like mica showed a clear hydrophobic behavior after being coated with just one MOF/ODP film. Moreover, the increment of the WCA was significantly higher using MOF/ODP coatings than pure ODP films (WCA values between 92° and 99°) and deviations from the average WCA values were

Hydrophilicity and carbon chain length effects on the gas sensing properties of chemoresistive, self-assembled monolayer carbon nanotube sensors

• Juan Casanova-Cháfer,
• Carla Bittencourt and
• Eduard Llobet

Beilstein J. Nanotechnol. 2019, 10, 565–577, doi:10.3762/bjnano.10.58

• (which accounted for 5.7 wt % in bare samples) is almost no longer “visible” by XPS after the formation of the SAM. The hydrophilicity of the different coatings was studied via contact angle measurements. It was found that bare Au-MWCNTs showed a hydrophilic character due to the presence of carboxyl

• thiols [28]. Material characterization The hydrophilicity of the gas-sensitive coatings was evaluated using an optical tensiometer from Biolin Scientific. Their chemical composition was characterized by Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). Raman spectrometry was performed

Ceria/polymer nanocontainers for high-performance encapsulation of fluorophores

• Kartheek Katta,
• Dmitry Busko,
• Yuri Avlasevich,
• Katharina Landfester,
• Stanislav Baluschev and
• Rafael Muñoz-Espí

Beilstein J. Nanotechnol. 2019, 10, 522–530, doi:10.3762/bjnano.10.53

• film at the oil–water interface [32] or rose bengal embedded in a microcapsule shell [33] can also be used to protect the encapsulated dye from molecular oxygen. Incorporating oxygen-scavenging materials such as WO3 photocatalysts loaded with Pt [34], phosphonate coatings [35], organophosphates [36] or

Ultraviolet patterns of flowers revealed in polymer replica – caused by surface architecture

• Anna J. Schulte,
• Matthias Mail,
• Lisa A. Hahn and
• Wilhelm Barthlott

Beilstein J. Nanotechnol. 2019, 10, 459–466, doi:10.3762/bjnano.10.45

• the reflection of light. Mechanisms to reduce the reflection of light and to extend the light path length in the material are particularly interesting for several technical applications [33][34][35]. Today, anti-reflective coatings are used in a broad range of optical applications, and importantly

• antireflective or absorbing coatings, lenses and many more. Experimental Plant material Based on prior examinations of UV-reflection in some 8,000 species, three model species with distinct patterns were selected. Two are yellow flowering North American members of the sunflower family (Asteraceae): the Apache

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

• atoms·cm−2) is directly converted into the amount of parylene (in monomeric units·cm−2), since each monomeric unit contains one Cl atom. RBS analysis was performed on coatings deposited on silicon substrates. Taking into account the desorption of Cl-containing species from the film occurring during ion

Biocompatible organic–inorganic hybrid materials based on nucleobases and titanium developed by molecular layer deposition

• Leva Momtazi,
• Henrik H. Sønsteby and
• Ola Nilsen

Beilstein J. Nanotechnol. 2019, 10, 399–411, doi:10.3762/bjnano.10.39

• combining titanium tetra-isopropoxide (TTIP) and the nucleobases thymine, uracil or adenine using the molecular layer deposition (MLD) approach. Such materials have potential as bioactive coatings, and the bioactivity of these films is described in our recent work [Momtazi, L.; Dartt, D. A.; Nilsen, O

• anticancer complexes for better metallo-pharmaceutical activity and toxicity reduction [8]. This work describes the growth of films based on such organic nucleotides as complexes with the biocompatible metal titanium. As thin films, such materials can be better applied as coatings on scaffolds or implants

Development of an anti-pollution coating process technology for the application of an on-site PV module

• Sejin Jung,
• Wonseok Choi,
• Jung Hyun Kim and
• Jang Myoun Ko

Beilstein J. Nanotechnol. 2019, 10, 332–336, doi:10.3762/bjnano.10.32

• were measured using the integrating sphere of a UV–visible spectrophotometer (Mega 700, Scinco Co., Ltd., South Korea). Results and Discussion The light transmittance measurement results of the fabricated functional coatings are summarized in Figure 1. The light transmittance of the coating film

Uniform Sb₂S₃ optical coatings by chemical spray method

• Jako S. Eensalu,
• Atanas Katerski,
• Erki Kärber,
• Ilona Oja Acik,
• Arvo Mere and
• Malle Krunks

Beilstein J. Nanotechnol. 2019, 10, 198–210, doi:10.3762/bjnano.10.18

• controllable in-air growth of continuous, uniform, polycrystalline Sb2S3 absorber layers has not yet been accomplished. This could be achieved with chemical spray pyrolysis, a robust chemical method for deposition of thin films. We applied a two-stage process to produce continuous Sb2S3 optical coatings with

• were investigated using Raman spectroscopy, X-ray diffraction, scanning electron microscopy, energy dispersive X-ray spectroscopy and UV–vis–NIR spectroscopy. We demonstrated that Sb2S3 optical coatings with controllable structure, morphology and optical properties can be deposited by ultrasonic spray

• two-step process on ZnO nanorod/TiO2 substrates [7]. In this study, we applied this two-step process, i.e., depositing amorphous Sb2S3 layers on planar substrates, followed by post-deposition crystallization. The aim of this study was to produce crystalline, continuous, Sb2S3 optical coatings with

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

• in the range of 11 ≤ L ≤ 24 μm. In contrast to planar substrates, the laser beam must be directed to the solution/substrate interface after traversing the solution (Figure 3c,d). In these conditions, deposition durations of 15 min are sufficient for the successful deposition of thin Ru/C coatings

• reaction [69][70][71]. Conclusion With this, we have established a novel type of nanostructured Ru/C composite electrode for the oxygen evolution reaction at pH 4 by laser-induced deposition. Laser irradiation of Ru3(CO)12 in 1,2-dichloroethane at 325 nm provides the first laser-induced coatings of hybrid

• the anodized Al2O3 with 0.7 M CuCl2 solution in 10% HCl, followed by opening the Al2O3 barrier layer closing the pores with simultaneous isotropic pore widening in 10 wt % H3PO4 at 45 °C for 37 to 47 min. The laser-induced deposition of Ru/C coatings followed was adapted from the planar case (vide

Zn/F-doped tin oxide nanoparticles synthesized by laser pyrolysis: structural and optical properties

• Florian Dumitrache,
• Iuliana P. Morjan,
• Elena Dutu,
• Ion Morjan,
• Claudiu Teodor Fleaca,
• Monica Scarisoreanu,
• Alina Ilie,
• Marius Dumitru,
• Cristian Mihailescu,
• Adriana Smarandache and
• Gabriel Prodan

Beilstein J. Nanotechnol. 2019, 10, 9–21, doi:10.3762/bjnano.10.2

• case, the bandgap values decreased with increasing metal dopant content, down to 3.93 eV for 4 atom % Nd [24]. The FTO films were also successfully tested for other applications such as anticorrosive coatings on steel for fuel cell bipolar plates [25], sensors for liquefied petroleum gas [26

A new bioinspired method for pressure and flow sensing based on the underwater air-retaining surface of the backswimmer Notonecta

• Matthias Mail,
• Adrian Klein,
• Horst Bleckmann,
• Anke Schmitz,
• Torsten Scherer,
• Peter T. Rühr,
• Goran Lovric,
• Robin Fröhlingsdorf,
• Stanislav N. Gorb and
• Wilhelm Barthlott

Beilstein J. Nanotechnol. 2018, 9, 3039–3047, doi:10.3762/bjnano.9.282

• ., for drag reducing ship coatings [5]. Submerged backswimmers are covered with a thin air layer, in particular on their hemelytra (forewings) [4][11][12]. This air layer remains stable over long periods of time under both static and dynamic conditions [4][13][14][15]. To understand the mechanism that

Ternary nanocomposites of reduced graphene oxide, polyaniline and hexaniobate: hierarchical architecture and high polaron formation

• Claudio H. B. Silva,
• Maria Iliut,
• Christopher Muryn,
• Christian Berger,
• Zachary Coldrick,
• Vera R. L. Constantino,
• Marcia L. A. Temperini and
• Aravind Vijayaraghavan

Beilstein J. Nanotechnol. 2018, 9, 2936–2946, doi:10.3762/bjnano.9.272

• applied, for instance, as supercapacitors, sensing materials, solar cells, electrochromic devices, anticorrosion coatings or as materials for carbon dioxide capture [8]. The layered inorganic phase offers a high surface area for PANI deposition and increases its thermal stability with regard to

Layered calcium phenylphosphonate: a hybrid material for a new generation of nanofillers

• Kateřina Kopecká,
• Ludvík Beneš,
• Klára Melánová,
• Vítězslav Zima,
• Petr Knotek and
• Kateřina Zetková

Beilstein J. Nanotechnol. 2018, 9, 2906–2915, doi:10.3762/bjnano.9.269

• layer is formed by rather hydrophobic phenyl groups, which makes them a suitable material for incorporation into the hydrophobic polymer matrices. An epoxy resin was chosen as a polymer matrix because epoxy resins are widespread and useful in various industrial applications ranging from coatings, to

Low cost tips for tip-enhanced Raman spectroscopy fabricated by two-step electrochemical etching of 125 µm diameter gold wires

• Antonino Foti,
• Francesco Barreca,
• Enza Fazio,
• Cristiano D’Andrea,
• Paolo Matteini,
• Onofrio Maria Maragò and
• Pietro Giuseppe Gucciardi

Beilstein J. Nanotechnol. 2018, 9, 2718–2729, doi:10.3762/bjnano.9.254

• tip [29][30]. TERS tips are nowadays produced by the chemical/electrochemical etching of metal wires [31][32][33][34][35], metal coatings of AFM tips [36][37][38], electroless deposition, [39] galvanic displacement [40] or by advanced nanostructuration techniques such as electron beam induced

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

• resources. In order to do so, new strategies for optimized tribological systems have to be considered. Among them are the formulation of new lubricants [2][3], novel coatings [4][5][6], a more thorough understanding of the basic materials science principles governing friction and wear of bulk materials [7

Cytotoxicity of doxorubicin-conjugated poly[N-(2-hydroxypropyl)methacrylamide]-modified γ-Fe₂O₃ nanoparticles towards human tumor cells

• Zdeněk Plichta,
• Yulia Kozak,
• Rostyslav Panchuk,
• Viktoria Sokolova,
• Matthias Epple,
• Lesya Kobylinska,
• Pavla Jendelová and
• Daniel Horák

Beilstein J. Nanotechnol. 2018, 9, 2533–2545, doi:10.3762/bjnano.9.236

• contrast agents have been approved by the regulatory authorities. It is well-known that the in vivo distribution of iron oxide nanoparticles is strongly influenced by their surface coatings. The coating ensures colloidal stability, prevents particles from aggregation, introduces functional groups for

• chemical attachment of target biomolecules, reduces cytotoxicity, and controls particle uptake by the cells [10]. Coatings can be either of low molecular weight, such are carbohydrates and organic acids (ethylenediaminetetraacetic acid, tartaric acid, citric acid, succinic acid, bisphosphonic acid), or of

Effect of electrospinning process variables on the size of polymer fibers and bead-on-string structures established with a 2³ factorial design

• Paulina Korycka,
• Adam Mirek,
• Katarzyna Kramek-Romanowska,
• Marcin Grzeczkowicz and
• Dorota Lewińska

Beilstein J. Nanotechnol. 2018, 9, 2466–2478, doi:10.3762/bjnano.9.231

• among others as: coatings with hydrophobic properties [19], membranes for fog harvesting [20], drug delivery systems with encapsulated therapeutic substances [21]. Therefore, it is fully justified to dedicate a study to the analysis of conditions in which the beads can be optimally obtained. Although a

ZnO-nanostructure-based electrochemical sensor: Effect of nanostructure morphology on the sensing of heavy metal ions

• Marina Krasovska,
• Vjaceslavs Gerbreders,
• Irena Mihailova,
• Andrejs Ogurcovs,
• Eriks Sledevskis,
• Andrejs Gerbreders and
• Pavels Sarajevs

Beilstein J. Nanotechnol. 2018, 9, 2421–2431, doi:10.3762/bjnano.9.227

• , nanostructures of ZnO were synthesized in four different morphologies: nanorods, nanoneedles, nanotubes and nanoplates. To determine the peculiarities of adsorption for each morphology, a series of electrochemical measurements were carried out using these nanostructured ZnO coatings on the working electrodes

• were carried out using these nanostructured ZnO coatings on the working electrodes using aqueous solutions of Pb(NO3)2 and Cd(NO3)2 as analytes with different concentrations. Experimental Design and fabrication of the ZnO nanostructure-based electrochemical sensor Three morphologies of well-aligned one

• that the resulting nanostructured coatings of all three morphologies were dense, homogeneous and of well-controlled shapes (see Figure 2). The X-ray diffraction results revealed that the samples are crystalline with a hexagonal wurtzite structure. All XRD spectra show one dominant diffraction peak

Block copolymers for designing nanostructured porous coatings

• Roberto Nisticò

Beilstein J. Nanotechnol. 2018, 9, 2332–2344, doi:10.3762/bjnano.9.218

• Roberto Nistico Department of Applied Science and Technology DISAT, Polytechnic of Torino, C.so Duca degli Abruzzi 24, 10129 Torino, Italy 10.3762/bjnano.9.218 Abstract Highly ordered porous coatings find applications in many fields, such as nanotechnology, microfluidics and nanofluidics

• , membrane separation, and sensing. In recent years, there has been great interest regarding the synthesis of isoporous and well-ordered (in)organic coatings for the production of highly selective functional membranes. Among the different strategies that have been proposed to date for preparing these porous

• thin coatings, one simple route involves the use of self-assembled amphiphilic block copolymers either as the porogen (acting as sacrificial templating agents for the production of inorganic architectures) or as a source of the porogen (by self-assembly for the production of polymeric substrates

Performance analysis of rigorous coupled-wave analysis and its integration in a coupled modeling approach for optical simulation of complete heterojunction silicon solar cells

• Ziga Lokar,
• Benjamin Lipovsek,
• Marko Topic and
• Janez Krc

Beilstein J. Nanotechnol. 2018, 9, 2315–2329, doi:10.3762/bjnano.9.216

• conversion efficiency of solar cells. Such techniques aim to improve the coupling of light into the structure (e.g., antireflective coatings and nanostructures at the front side of solar cells) and the light trapping ability of the structure (e.g., nano- and micrometer size textures for light scattering and

• management coatings. Conclusion In the paper, we have analyzed the RCWA performance in terms of reliability and accuracy of the optical simulation of solar cell structures, in particular for HJ Si solar cells with textures for light management. For efficient simulation of whole HJ Si solar cells, including

Intrinsic ultrasmall nanoscale silicon turns n-/p-type with SiO₂/Si₃N₄-coating

• Dirk König,
• Daniel Hiller,
• Noël Wilck,
• Birger Berghoff,
• Merlin Müller,
• Sangeeta Thakur,
• Giovanni Di Santo,
• Luca Petaccia,
• Joachim Mayer,
• Sean Smith and
• Joachim Knoch

Beilstein J. Nanotechnol. 2018, 9, 2255–2264, doi:10.3762/bjnano.9.210

• ) in particular at the gate-channel/gate-underlap interface and at the Ni–contact–Si interfaces, both depending on lcon (see Supporting Information File 1). Without the energy shift caused by Si3N4-coatings in source/drain, we obtain substantially higher Schottky-barriers for device II, resulting in

• yield p- (n-) type behaviour by shifting the electronic DOS towards (away from) Evac using ultrathin Si3N4- (SiO2-) coatings. The key parameters for this phenomenon are the electron affinities X of N and O together with their IOB and bond length to Si. Using NEGF device simulations we compared two