Flexible photonic crystal membranes with nanoparticle high refractive index layers

• Torben Karrock,
• Moritz Paulsen and
• Martina Gerken

Beilstein J. Nanotechnol. 2017, 8, 203–209, doi:10.3762/bjnano.8.22

• replication of a 400 nm period linear grating nanostructure into a ≈60 µm thick polydimethylsiloxane membrane and subsequent spin coating of a high refractive index titanium dioxide nanoparticle layer. Samples are prepared with different nanoparticle concentrations. Guided-mode resonances with a quality

• highly flexible photonic crystal slabs by utilizing nanoreplication of a linear grating nanostructure with a period of 400 nm into a polydimethylsiloxane (PDMS) membrane and subsequent spin coating of titanium dioxide (TiO2) nanoparticles. Investigations with 300 nm and 500 nm gratings lead to similar

• nm period and 140 nm deep linear grating nanostructure is coated with a high-refractive index layer of titanium dioxide (TiO2) nanoparticles. Resonances are observed in the normal-incidence transmission spectrum between crossed-polarization filters. The resonance shift is investigated as a function

Laser irradiation in water for the novel, scalable synthesis of black TiO_x photocatalyst for environmental remediation

• Massimo Zimbone,
• Giuseppe Cacciato,
• Mohamed Boutinguiza,
• Vittorio Privitera and
• Maria Grazia Grimaldi

Beilstein J. Nanotechnol. 2017, 8, 196–202, doi:10.3762/bjnano.8.21

• trap surface states for holes in an amorphous hydrogenated TiOx layer. Keywords: black titania; laser irradiation in water; photocatalysis; TiOx; water treatment; Introduction The interest in titanium dioxide dates back in 1972, thanks to the pioneering work of Honda and Fujishima [1]. TiO2 has been

Optical and photocatalytic properties of TiO₂ nanoplumes

• Viviana Scuderi,
• Massimo Zimbone,
• Maria Miritello,
• Giuseppe Nicotra,
• Giuliana Impellizzeri and
• Vittorio Privitera

Beilstein J. Nanotechnol. 2017, 8, 190–195, doi:10.3762/bjnano.8.20

• ; photocatalysis; titanium dioxide (TiO2); Introduction Today water, energy, and food are the most urgent problems of humanity. Since the seminal work of Honda and Fujishima in 1972 where photo-induced decomposition of water was discovered [1], semiconductor photocatalysis has shown great potential not only for

Nanocrystalline TiO₂/SnO₂ heterostructures for gas sensing

• Barbara Lyson-Sypien,
• Anna Kusior,
• Mieczylaw Rekas,
• Jan Zukrowski,
• Marta Gajewska,
• Katarzyna Michalow-Mauke,
• Thomas Graule,
• Marta Radecka and
• Katarzyna Zakrzewska

Beilstein J. Nanotechnol. 2017, 8, 108–122, doi:10.3762/bjnano.8.12

• ). The larger sensor response, R0/R (by about 20 times) for SnO2-rich heterostructures compared to TiO2-rich ones is typical as titanium dioxide requires higher temperatures for improved sensing characteristics. In Figure 5c and Figure 5d one can also analyze the influence of the formation of

• this data one can conclude that in the case of 90 mol % SnO2/10 mol % TiO2, O2− and O− are adsorbed and the ratio of O−/O2− increases with temperature. Considering the 10 mol % SnO2/90 mol % TiO2 nanomaterial, n is in the range of 0.25–0.40. The reduction of titanium dioxide leads to the formation of

Ordering of Zn-centered porphyrin and phthalocyanine on TiO₂(011): STM studies

• Piotr Olszowski,
• Lukasz Zajac,
• Szymon Godlewski,
• Bartosz Such,
• Rémy Pawlak,
• Antoine Hinaut,
• Res Jöhr,
• Thilo Glatzel,
• Ernst Meyer and
• Marek Szymonski

Beilstein J. Nanotechnol. 2017, 8, 99–107, doi:10.3762/bjnano.8.11

• investigation of molecular adsorption is titanium dioxide [11][12]. The most stable and the most studied face of TiO2 is the rutile (110) surface. In the context of adsorption studies, it is important to note that the (110) face of rutile usually contains numerous oxygen vacancies, often filled with hydroxy

Diffusion of dilute gas in arrays of randomly distributed, vertically aligned, high-aspect-ratio cylinders

• Wojciech Szmyt,
• Carlos Guerra and
• Ivo Utke

Beilstein J. Nanotechnol. 2017, 8, 64–73, doi:10.3762/bjnano.8.7

• reflection from nanocylinder walls assuming the molecular regime of gas transport. The example calculation of a diffusion coefficient is delivered for a system of titanium isopropoxide molecules diffusing between vertically aligned carbon nanotubes coated with titanium dioxide, which is especially relevant

The cleaner, the greener? Product sustainability assessment of the biomimetic façade paint Lotusan^® in comparison to the conventional façade paint Jumbosil^®

• Florian Antony,
• Rainer Grießhammer,
• Thomas Speck and
• Olga Speck

Beilstein J. Nanotechnol. 2016, 7, 2100–2115, doi:10.3762/bjnano.7.200

• manufacturers (VdL), Lotusan® consists of an emulsion of polyoxysiloxane, polymer dispersion, titanium dioxide, silicon dioxide, water and additives [31]. According to the technical bulletin [32], Lotusan® is characterized by a density of 1.4–1.6 g/mL, and is highly permeable to carbon dioxide and water vapour

• , dispersion-based façade paint. In accordance with the reporting guideline [31], Jumbosil® consists of polymer dispersion, titanium dioxide, calcium carbonate, silicate fillers, talcum, water, glycol ether, aliphatic compounds, additives and preserving agents [33]. Jumbosil® is characterized by a density of

• mainly because of Lotusan®’s higher content of titanium dioxide (TiO2). Regarding the remaining impact indicators both façade paints are equal within the calculation inaccuracy. Contributions by life-cycle stages: The key issue of the contribution analysis is a clarification of the composition of the

Nanostructured TiO₂-based gas sensors with enhanced sensitivity to reducing gases

• Wojciech Maziarz,
• Anna Kusior and
• Anita Trenczek-Zajac

Beilstein J. Nanotechnol. 2016, 7, 1718–1726, doi:10.3762/bjnano.7.164

• material for application as an acetone sensor. Keywords: acetone; flower-like 3D nanostructures; gas sensors; selectivity; titanium dioxide; Introduction The market for resistive-type gas sensors is dominated by materials developed on the base of thin or thick layers composed of polycrystalline metal

• to display better gas selectivity and sensitivity [1][2]. Additionally, open nanostructures facilitate the penetration of gas, and as a consequence, reduces the response time. Titanium dioxide (TiO2) is effectively used in environmental and energy production applications such as dye-sensitized solar

• electronic structure by improving electron migration from titanium dioxide to tin dioxide and promotes oxygen molecule adsorption at the surface [34]. The as-formed heterojunction (n–n type) affects the response due to the formation of the accumulation/depletion layer and increases the potential barrier at

Scanning probe microscopy studies on the adsorption of selected molecular dyes on titania

• Jakub S. Prauzner-Bechcicki,
• Lukasz Zajac,
• Piotr Olszowski,
• Res Jöhr,
• Antoine Hinaut,
• Thilo Glatzel,
• Bartosz Such,
• Ernst Meyer and
• Marek Szymonski

Beilstein J. Nanotechnol. 2016, 7, 1642–1653, doi:10.3762/bjnano.7.156

• , Jagiellonian University, Łojasiewicza 11, 30-348 Krakow, Poland Department of Physics, University of Basel, Klingelbergstr. 82, 4056 Basel, Switzerland 10.3762/bjnano.7.156 Abstract Titanium dioxide, or titania, sensitized with organic dyes is a very attractive platform for photovoltaic applications. In this

• dianhydride (PTCDA); phtalocyanines; porphyrins; rutile; scanning probe microscopy; scanning tunneling microscopy (STM); titanium dioxide (TiO2); Introduction Today it comes as no surprise that photovoltaic devices can be made of materials other than silicon. Nanocrystalline materials accompanied by organic

• stability against photocorrosion at the expense of decreased sensitivity to the visible spectrum. A good example of this type of material is titanium dioxide, which has a band gap of 3.0–3.2 eV and absorbs only the ultraviolet part of the solar spectrum. Thus, bare TiO2 used in photovoltaic applications has

Electric field induced structural colour tuning of a silver/titanium dioxide nanoparticle one-dimensional photonic crystal

• Eduardo Aluicio-Sarduy,
• Simone Callegari,
• Diana Gisell Figueroa del Valle,
• Andrea Desii,
• Ilka Kriegel and
• Francesco Scotognella

Beilstein J. Nanotechnol. 2016, 7, 1404–1410, doi:10.3762/bjnano.7.131

• . In this work, we demonstrate structural colour in a photonic crystal device comprised of alternating layers of silver nanoparticles and titanium dioxide nanoparticles, exhibiting spectral shifts of around 10 nm for an applied voltage of only 10 V. The accumulation of charge at the metal/dielectric

• (i.e. decrease of the effective refractive index). These results are the first demonstration of active colour tuning in silver/titanium dioxide nanoparticle-based photonic crystals and open the route to metal/dielectric-based photonic crystals as electro-optic switches. Keywords: electro-optic

• evidence of structural colour tuning with an electric field in a one-dimensional photonic crystal made of alternating layers of silver nanoparticles and titanium dioxide nanoparticles. We have observed a blue shift of about 10 nm with an applied voltage of 10 V. We give an interpretation of the phenomenon

High antiviral effect of TiO₂·PL–DNA nanocomposites targeted to conservative regions of (−)RNA and (+)RNA of influenza A virus in cell culture

• Asya S. Levina,
• Marina N. Repkova,
• Elena V. Bessudnova,
• Ekaterina I. Filippova,
• Natalia A. Mazurkova and
• Valentina F. Zarytova

Beilstein J. Nanotechnol. 2016, 7, 1166–1173, doi:10.3762/bjnano.7.108

• TiO2·PL–DNA nanocomposite consisting of titanium dioxide nanoparticles and polylysine (PL)-containing oligonucleotides. Results: The TiO2·PL–DNA nanocomposites bearing the DNA fragments targeted to different conservative regions of (−)RNA and (+)RNA of segment 5 of influenza A virus (IAV) were studied

Manufacturing and investigation of physical properties of polyacrylonitrile nanofibre composites with SiO₂, TiO₂ and Bi₂O₃ nanoparticles

• Tomasz Tański,
• Wiktor Matysiak and
• Barbara Hajduk

Beilstein J. Nanotechnol. 2016, 7, 1141–1155, doi:10.3762/bjnano.7.106

• of the strengthening phase. When using nanoparticles of Bi2O3 as the reinforcing phase, the increase in the diameter of the nanofibres is approximately linear (Figure 8), with an increase of approx. 10 nm for every 4 wt % of Bi2O3, comparable to the titanium dioxide case. For a shorter distance

• titanium dioxide nanoparticles led to a significant increase in the dielectric constant to 2.64 (8 wt %) and 2.81 (12 wt %). The maximum value of the dielectric transmittance of the studied fibrous layers was obtained for composite nanofibres reinforced with nanoparticles of Bi2O3. Adding them to the

• nanoparticles at the maximum mass concentration. In this case, the dielectric constant was 1.94. Fibrous layers reinforced with 8 wt % Bi2O3 exhibited a dielectric transmittance similar to that obtained for fibres reinforced with 4 wt % titanium dioxide, namely 2.19. The analysis of the relative dielectric

Fast diffusion of silver in TiO₂ nanotube arrays

• Wanggang Zhang,
• Yiming Liu,
• Diaoyu Zhou,
• Hui Wang,
• Wei Liang and
• Fuqian Yang

Beilstein J. Nanotechnol. 2016, 7, 1129–1140, doi:10.3762/bjnano.7.105

• the outmost surface of TiO2 nanotubes. Probably there are hardly any Ag nanocrystals formed inside the TiO2 nanotubes through the migration of Ag. Keywords: activation energy; fast diffusion; magnetron sputtering; silver; TiO2 nanotube; Introduction Titanium dioxide (TiO2) has gained great attention

Tight junction between endothelial cells: the interaction between nanoparticles and blood vessels

• Yue Zhang and
• Wan-Xi Yang

Beilstein J. Nanotechnol. 2016, 7, 675–684, doi:10.3762/bjnano.7.60

• Asian sand dust, which caused acute inflammation in the lung [44]. Studies also present the effect of NPs on reproductive organs. A study on the toxicity of titanium dioxide nanoparticles showed the ability of NPs to cross the brain–testis barrier and accumulate in mice testes [22]. To further explain

Unraveling the neurotoxicity of titanium dioxide nanoparticles: focusing on molecular mechanisms

• Bin Song,
• Yanli Zhang,
• Jia Liu,
• Xiaoli Feng,
• Ting Zhou and
• Longquan Shao

Beilstein J. Nanotechnol. 2016, 7, 645–654, doi:10.3762/bjnano.7.57

• Bin Song Yanli Zhang Jia Liu Xiaoli Feng Ting Zhou Longquan Shao Guizhou Provincial People’s Hospital, Guiyang 550002, China Nanfang Hospital, Southern Medical University, Guangzhou 510515, China 10.3762/bjnano.7.57 Abstract Titanium dioxide nanoparticles (TiO2 NPs) possess unique characteristics

• investigated comprehensively through studying every possible molecular mechanism. Keywords: autophagy; brain; DNA methylation; neurotoxicity; titanium dioxide nanoparticles; Introduction Titanium dioxide nanoparticles, smaller than 1 μm in at least one dimension, possess specific physico-chemical

• NPs, and improve the bio-safety of TiO2 NPs-based products, every possible molecular mechanism of TiO2 NPs-induced neurotoxicity must be investigated comprehensively. Mechanisms of neurotoxicity of titanium dioxide nanoparticles in in vivo studies. Main mechanisms of neurotoxicity of titanium dioxide

Comparison of the interactions of daunorubicin in a free form and attached to single-walled carbon nanotubes with model lipid membranes

• Dorota Matyszewska

Beilstein J. Nanotechnol. 2016, 7, 524–532, doi:10.3762/bjnano.7.46

• fields. Such magnetic nanoparticles conjugated with DNR were reported to induce apoptosis of cancer cell lines [11][12]. Other examples of nanoparticles include titanium dioxide (TiO2) and gold nanoparticles (AuNPs) [13][14]. In the latter case the nanoparticles were also modified with aptamer – single

Application of biclustering of gene expression data and gene set enrichment analysis methods to identify potentially disease causing nanomaterials

• Andrew Williams and
• Sabina Halappanavar

Beilstein J. Nanotechnol. 2015, 6, 2438–2448, doi:10.3762/bjnano.6.252

• were examined and functionally related biclusters of genes showing similar expression profiles were identified. The identified biclusters were then used to conduct a gene set enrichment analysis on pulmonary gene expression profiles derived from mice exposed to nano-titanium dioxide (nano-TiO2), carbon

• toxicity induced by nanoparticles of titanium dioxide (nano-TiO2) [46][47][48] and carbon nanotubes (CNTs) [49][50] of various sizes and properties. This work identified the properties of nano-TiO2 that influence their inflammogenic potential [51]. These studies have generated a large repository of gene

Impact of ultrasonic dispersion on the photocatalytic activity of titania aggregates

• Hoai Nga Le,
• Frank Babick,
• Klaus Kühn,
• Minh Tan Nguyen,
• Michael Stintz and
• Gianaurelio Cuniberti

Beilstein J. Nanotechnol. 2015, 6, 2423–2430, doi:10.3762/bjnano.6.250

• oxidation, discoloration, mineralization, and degradation of organic pollutants [1][2]. Photocatalysis is an example of an AOP that has been effectively applied for the treatment of highly polluted water such as dye sewage [3][4]. Among the materials for this application, titanium dioxide (TiO2) is a very

Influence of wide band gap oxide substrates on the photoelectrochemical properties and structural disorder of CdS nanoparticles grown by the successive ionic layer adsorption and reaction (SILAR) method

• Mikalai V. Malashchonak,
• Alexander V. Mazanik,
• Olga V. Korolik,
• Еugene А. Streltsov and
• Anatoly I. Kulak

Beilstein J. Nanotechnol. 2015, 6, 2252–2262, doi:10.3762/bjnano.6.231

• . The synthesis of the titanium dioxide nanotube arrays was carried out in a two-electrode electrochemical cell by anodization of metallic titanium with a graphite counter electrode in an aqueous electrolyte containing 1 mol/L (NH4)2SO4, 0.1 mol/L NH4F and 0.2 mol/L H2C2O4 with pH 2.8 (corrected with

Effect of SiN_x diffusion barrier thickness on the structural properties and photocatalytic activity of TiO₂ films obtained by sol–gel dip coating and reactive magnetron sputtering

• Mohamed Nawfal Ghazzal,
• Eric Aubry,
• Nouari Chaoui and
• Didier Robert

Beilstein J. Nanotechnol. 2015, 6, 2039–2045, doi:10.3762/bjnano.6.207

• films obtained by each process was discussed. Keywords: diffusion barrier; photocatalysis; reactive sputtering; SiNx; sol–gel; titanium dioxide film; TiO2; Introduction Titanium dioxide thin films in active phase (mostly anatase) have been widely studied due to their ability to produce strong oxidant

• titanium dioxide grown on soda lime glass (SLG) occurs during the calcination step and is due to the diffusion of alkali elements (especially sodium ions, Na+) [3][4]. Usually, TiO2 is amorphous when deposited at low temperature [5][6]. Heat treatment at a higher temperature (around 450 °C) is usually

• species responsible for the degradation of OII. For an equivalent TiO2 thickness, the degradation rate of OII is relatively similar. Conclusion We investigated the structural and photocatalytic properties of titanium dioxide films obtained by low temperature sol–gel and reactive sputtering processes for

NanoE-Tox: New and in-depth database concerning ecotoxicity of nanomaterials

• Katre Juganson,
• Angela Ivask,
• Irina Blinova,
• Monika Mortimer and
• Anne Kahru

Beilstein J. Nanotechnol. 2015, 6, 1788–1804, doi:10.3762/bjnano.6.183

• database NanoE-Tox that is available as Supporting Information File 2. The database is based on existing literature on ecotoxicology of eight ENMs with different chemical composition: carbon nanotubes (CNTs), fullerenes, silver (Ag), titanium dioxide (TiO2), zinc oxide (ZnO), cerium dioxide (CeO2), copper

• : carbon nanotubes (CNTs), fullerenes, silver (Ag), titanium dioxide (TiO2), zinc oxide (ZnO), cerium dioxide (CeO2), copper oxide (CuO), and iron oxide (FeOx; Fe2O3, Fe3O4). Furthermore, all these ENMs, except CuO, are listed by the Organisation for Economic Co-operation and Development (OECD) Working

Nanotechnology in the real world: Redeveloping the nanomaterial consumer products inventory

• Marina E. Vance,
• Todd Kuiken,
• Eric P. Vejerano,
• Sean P. McGinnis,
• Michael F. Hochella Jr.,
• David Rejeski and
• Matthew S. Hull

Beilstein J. Nanotechnol. 2015, 6, 1769–1780, doi:10.3762/bjnano.6.181

• primary particles have at least one dimension between 1 and 100 nm, with no provisions for “novel properties” stemming from their small size [16]. Cosmetics that contain nanomaterials are also regulated by the European Commission, and although the use of nanoscale titanium dioxide is permitted, zinc oxide

• nanomaterial component and 62 of those products list more than one nanomaterial component (e.g., a product comprised of both silver and titanium dioxide nanomaterials). There are 39 different types of nanomaterial components listed in the inventory (listed in Supporting Information File 1, Table S2), which

• . Titanium dioxide (TiO2), silicon dioxide, and zinc oxide are the most produced nanomaterials worldwide (on a mass basis) and the global annual production of silver nanoparticles represents only 2% of that of TiO2 [20][21]. However, silver nanoparticles are the most popular advertised nanomaterial in the

How decision analysis can further nanoinformatics

• Matthew E. Bates,
• Sabrina Larkin,
• Jeffrey M. Keisler and
• Igor Linkov

Beilstein J. Nanotechnol. 2015, 6, 1594–1600, doi:10.3762/bjnano.6.162

• nanomaterial research is identified. A case study by Hristozov et al. used a quantitative WOE framework to evaluate the hazards associated with titanium dioxide nanoparticles. Three sets of criteria (physiochemical properties, toxicity, and data quality) were used to evaluate and calculate the hazard scores by

• to prioritize research portfolios at the national level. This PDA was an extension of a VOI approach evaluating multiple research topics for three emerging nanomaterials: multiwalled carbon nanotubes, silver nanoparticles, and titanium dioxide nanoparticles [26]. First, a preliminary screening tool

Transformations of PTCDA structures on rutile TiO₂ induced by thermal annealing and intermolecular forces

• Szymon Godlewski,
• Jakub S. Prauzner-Bechcicki,
• Thilo Glatzel,
• Ernst Meyer and
• Marek Szymoński

Beilstein J. Nanotechnol. 2015, 6, 1498–1507, doi:10.3762/bjnano.6.155

• example, titanium dioxide surfaces are exceptionally useful in various applications, including the catalysis, solar energy conversion, gas sensing and others [8][9][10][11][12][13][14][15]. Merging two classes of materials, i.e., metal oxide surfaces with organic molecules, seems to be one of the most

• titanium dioxide. The chosen perylene derivative, i.e., PTCDA, is often considered as a model planar-stacking organic molecule for organic semiconductors [19][20][21][22][23][24][25][26], similar to how the CO molecule is regarded as a model for small inorganic molecules. There are several important

• established on the basis of experimental and theoretical studies [14]. The (110) face is the most stable face of rutile titanium dioxide. The surface is composed of protruding oxygen rows running along the [001] crystallographic direction separated by approximately 0.649 nm. The structural model of the

Using natural language processing techniques to inform research on nanotechnology

• Nastassja A. Lewinski and
• Bridget T. McInnes

Beilstein J. Nanotechnol. 2015, 6, 1439–1449, doi:10.3762/bjnano.6.149

• the sentence “The purpose of this study was to review published dose-response data on acute lung inflammation in rats after instillation of titanium dioxide particles or six types of carbon nanoparticles.” with the NANO, EXPO, TARGET and TOXIC mentions within the sentence “The purpose of this study

• was to review published dose-response data on acute lung inflammation in rats after installation of titanium dioxide particles or six types of carbon nanoparticles ).” Features extracted from the context