A non-enzymatic electrochemical hydrogen peroxide sensor based on copper oxide nanostructures

• Irena Mihailova,
• Vjaceslavs Gerbreders,
• Marina Krasovska,
• Eriks Sledevskis,
• Valdis Mizers,
• Andrejs Bulanovs and
• Andrejs Ogurcovs

Beilstein J. Nanotechnol. 2022, 13, 424–436, doi:10.3762/bjnano.13.35

• nanostructures were obtained by a one-step hydrothermal oxidation method. The resulting coating is uniform and dense and shows good adhesion to the wire surface. Structure, surface, and composition of the obtained samples were studied using field-emission scanning electron microscopy along with energy-dispersive

• , such as thermal oxidation of copper electrodes in an oxygen atmosphere [72][73], hydrothermal chemical oxidation of copper surfaces [56], and hydrothermal synthesis using various precursors containing copper ions [74][75]. Copper oxide nanostructures can also be obtained as a powder and then applied to

• electrodes without additional treatments such as surface modification or enzyme immobilization. This article describes the process of obtaining wire electrodes with nanostructured CuO coatings by a one-step chemical hydrothermal oxidation method and their application in electrochemical measurements for the

A chemiresistive sensor array based on polyaniline nanocomposites and machine learning classification

• Jiri Kroutil,
• Alexandr Laposa,
• Ali Ahmad,
• Jan Voves,
• Vojtech Povolny,
• Ladislav Klimsa,
• Marina Davydova and
• Miroslav Husak

Beilstein J. Nanotechnol. 2022, 13, 411–423, doi:10.3762/bjnano.13.34

• /NCD, and PANI/BaTiO3) sensing layers were fabricated similarly as reported in [10]. The whole fabrication process of the sensor array is described in Figure 13. First, the protonated emeraldine salt form of PANI was prepared by oxidation of 0.2 M aniline hydrochloride with 0.25 M ammonium persulfate

Coordination-assembled myricetin nanoarchitectonics for sustainably scavenging free radicals

• Xiaoyan Ma,
• Haoning Gong,
• Kenji Ogino,
• Xuehai Yan and
• Ruirui Xing

Beilstein J. Nanotechnol. 2022, 13, 284–291, doi:10.3762/bjnano.13.23

• , cysteine, and glutamic acid. The cysteine residue plays a pivotal role in protecting the body from oxidation damage; however, GSH is easily metabolized by enzymes [23]. In this work, we employed a facile co-assembly strategy to design hybrid nanoparticles as antioxidants [24][25][26][27][28][29][30][31

Investigation of a memory effect in a Au/(Ti–Cu)Ox-gradient thin film/TiAlV structure

• Damian Wojcieszak,
• Jarosław Domaradzki,
• Michał Mazur,
• Tomasz Kotwica and
• Danuta Kaczmarek

Beilstein J. Nanotechnol. 2022, 13, 265–273, doi:10.3762/bjnano.13.21

• transitions using the Tauc method. Structure and elemental composition Surface properties The oxidation state of copper on the surface of (Ti0.48Cu0.52)Ox thin film was analyzed with the XPS Cu 2p core level spectrum (Figure 6). The Cu 2p core level has split spin–orbit components with ΔBE of 19.8 eV and an

• intensity ratio of Cu 2p1/2 and Cu 2p3/2 of approximately 0.5. It is possible to distinguish Cu oxidation states taking into consideration not only the position of the Cu 2p3/2 peak but also the satellite features that could be visible above the binding energy of this peak. According to Biesinger [48][49

• oxidation state +4 of titanium present at the surface. The ratio between the areas of the Ti 2p3/2 and Ti 2p1/2 peaks is equal to 2:1, which confirms the presence of stoichiometric TiO2 at the surface of (Ti0.48Cu0.52)Ox thin film. Furthermore, the O 1s spectrum (Figure 6c) was deconvoluted into three peaks

Relationship between corrosion and nanoscale friction on a metallic glass

• Haoran Ma and
• Roland Bennewitz

Beilstein J. Nanotechnol. 2022, 13, 236–244, doi:10.3762/bjnano.13.18

• solution and corrosion products on the surfaces reduced the friction coefficient [16][17]. The native oxide layers grown in the air were found to strengthen the friction coefficient and the wear resistance of MGs at the nanoscale [18][19]. The thermal oxidation caused a higher contribution of shearing and

Surfactant-free syntheses and pair distribution function analysis of osmium nanoparticles

• Mikkel Juelsholt,
• Jonathan Quinson,
• Emil T. S. Kjær,
• Baiyu Wang,
• Rebecca Pittkowski,
• Susan R. Cooper,
• Tiffany L. Kinnibrugh,
• Søren B. Simonsen,
• Luise Theil Kuhn,
• María Escudero-Escribano and
• Kirsten M. Ø. Jensen

Beilstein J. Nanotechnol. 2022, 13, 230–235, doi:10.3762/bjnano.13.17

• surfactants. Despite the absence of surfactants, the small-sized NPs are stable, in agreement with previous surfactant-free Os NP syntheses [37]. This can be attributed to chloride stabilization and/or stabilization by oxidation products of the monoalcohols [25]. Here, as opposed to the synthesis of Pt, Ir

Impact of device design on the electronic and optoelectronic properties of integrated Ru-terpyridine complexes

• Max Mennicken,
• Sophia Katharina Peter,
• Corinna Kaulen,
• Ulrich Simon and
• Silvia Karthäuser

Beilstein J. Nanotechnol. 2022, 13, 219–229, doi:10.3762/bjnano.13.16

• the oxidation state of the Ru ions bound to the respective molecular compounds is not feasible by these methods. In contrast, XPS BE highly depend on the oxidation state and/or the chemical composition and are, thus, a suitable means to reveal details of the Ru(TP)2-complex wire growth process

• has been successfully conducted and reveal the oxidation state of Ru during complex wire growth [19]. Electrical properties of Ru(TP)2-complex devices Here, we study the relation between device design and device performance and compare the transport and optical switching properties of functional Ru(TP

Engineered titania nanomaterials in advanced clinical applications

• Padmavati Sahare,
• Paulina Govea Alvarez,
• Juan Manual Sanchez Yanez,
• Gabriel Luna-Bárcenas,
• Samik Chakraborty,
• Sujay Paul and
• Miriam Estevez

Beilstein J. Nanotechnol. 2022, 13, 201–218, doi:10.3762/bjnano.13.15

• photocatalytic activity. Upon UV irradiation, the electrons in the valence band get excited to the conduction band, leading to the formation of electron–hole pairs and the generation of ROS. Subsequently, the generated holes (h+) convert water/hydroxide molecules to peroxide/hydroxyl radicals by oxidation. The

• the main connective tissue cells that secrete the collagen-rich extracellular matrix (ECM) for generating soft tissues that bind with the implants. Wang and co-workers reported that the super hydrophilic nanotubular structure of hydrogenated TiO2 prepared by anodic oxidation and thermal hydrogenation

Low-energy electron interaction and focused electron beam-induced deposition of molybdenum hexacarbonyl (Mo(CO)₆)

• Po-Yuan Shih,
• Maicol Cipriani,
• Christian Felix Hermanns,
• Jens Oster,
• Klaus Edinger,
• Armin Gölzhäuser and
• Oddur Ingólfsson

Beilstein J. Nanotechnol. 2022, 13, 182–191, doi:10.3762/bjnano.13.13

• reduction of the respective compound while ionization through electron removal represents oxidation. Thus, if sufficient proximity is provided, DEA as an initial fragmentation step should provide the prerequisite for metal–metal bond formation and nucleation points for further CO loss as is shown

Thermal oxidation process on Si(113)-(3 × 2) investigated using high-temperature scanning tunneling microscopy

• Hiroya Tanaka,
• Shinya Ohno,
• Kazushi Miki and
• Masatoshi Tanaka

Beilstein J. Nanotechnol. 2022, 13, 172–181, doi:10.3762/bjnano.13.12

• Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan 10.3762/bjnano.13.12 Abstract Thermal oxidation of Si(113) in a monolayer regime was investigated using high-temperature scanning tunneling microscopy (STM). Dynamic processes during thermal oxidation were examined in three

• oxidation modes – oxidation, etching, and transition modes – in the third of which both oxidation and etching occur. A precise temperature–pressure growth mode diagram was obtained via careful measurements for Si(113), and the results were compared with those for Si(111) in the present work and Si(001) in

• the literature. Initial oxidation processes were identified based on high-resolution STM images. Keywords: high-index Si surface; in situ measurement; oxidation; scanning tunneling microscopy (STM); Introduction High-index silicon surfaces have drawn considerable interest for their usefulness in

A comprehensive review on electrospun nanohybrid membranes for wastewater treatment

• Senuri Kumarage,
• Imalka Munaweera and
• Nilwala Kottegoda

Beilstein J. Nanotechnol. 2022, 13, 137–159, doi:10.3762/bjnano.13.10

• 5.5 [63]. Utilizing the synergistic effect of the oxidation of manganese dioxide and strong adsorption of iron oxides to As5+, Aliahmadipoor et al. developed a novel electrospun nanohybrid membrane incorporating inorganic Fe–Mn binary oxide nanoparticles into PVDF for the decontamination of As5+. A

Bacterial safety study of the production process of hemoglobin-based oxygen carriers

• Axel Steffen,
• Yu Xiong,
• Radostina Georgieva,
• Ulrich Kalus and
• Hans Bäumler

Beilstein J. Nanotechnol. 2022, 13, 114–126, doi:10.3762/bjnano.13.8

• the oxidation of iron in the heme group. Methemoglobin is not able to release oxygen [14][15]. It is, therefore, not suitable for the use in the production of HbMP applied as an artificial oxygen carrier. Since the aforementioned sterilization methods cannot be used, the solution to obtain sterile

Tin dioxide nanomaterial-based photocatalysts for nitrogen oxide oxidation: a review

• Viet Van Pham,
• Hong-Huy Tran,
• Thao Kim Truong and
• Thi Minh Cao

Beilstein J. Nanotechnol. 2022, 13, 96–113, doi:10.3762/bjnano.13.7

• received particular attention from the scientific community. The photocatalytic NOx oxidation will be an important contribution to mitigate climate change in the future. Existing review papers mainly focus on applying SnO2 materials for photocatalytic oxidation of pollutants in the water, while studies on

• review. Keywords: green products; nanomaterials; NO oxidation; photocatalysis; SnO2; Review Introduction A World Health Organization (WHO) report indicated that 4.2 million deaths every year occur due to exposure to ambient (outdoor) air pollution [1]. This number is much higher than the deaths from

• in recent years. There are many methods for controlling and removing NOx, such as reducing the burning temperature, reducing the residence time at peak temperature, chemical reduction or oxidation of NOx, removal of nitrogen from combustion fuels, and sorption, both adsorption and absorption [7][8

Theranostic potential of self-luminescent branched polyethyleneimine-coated superparamagnetic iron oxide nanoparticles

• Rouhollah Khodadust,
• Ozlem Unal and
• Havva Yagci Acar

Beilstein J. Nanotechnol. 2022, 13, 82–95, doi:10.3762/bjnano.13.6

• partial PEI oxidation during the synthesis. Here, we demonstrate in vitro dye-free optical imaging and successful gene transfection with luminescent SPION@bPEI, which was further modified for receptor-mediated delivery of the cargo selectively to cancer cell lines overexpressing the epidermal growth

• the backbone, acidification of amines, hydrogen bonding, exciplex formation, amine oxidation, and solvent-induced aggregation were reported as factors that amplify the weak luminescence of PEI and amine-containing dendrimers [15][16][17][18][20][24]. The luminescence of these materials is especially

• to SPION which has strong absorbance in the visible window of the electromagnetic spectrum. A tremendous enhancement in the poor, mostly unrecognized and unutilized blue luminescence of bPEI was achieved when it was used as a coating on SPION crystals. We suggested that the partial oxidation of the

Influence of magnetic domain walls on all-optical magnetic toggle switching in a ferrimagnetic GdFe film

• Rahil Hosseinifar,
• Evangelos Golias,
• Ivar Kumberg,
• Quentin Guillet,
• Karl Frischmuth,
• Sangeeta Thakur,
• Mario Fix,
• Manfred Albrecht,
• Florian Kronast and
• Wolfgang Kuch

Beilstein J. Nanotechnol. 2022, 13, 74–81, doi:10.3762/bjnano.13.5

• thermally oxidized SiOx layer and covered with a 3 nm Al capping layer to prevent oxidation. Composition and layer thicknesses were determined by calibrating the sputter rates with a quartz balance before the depositions. Thus, the sample structure was as follows: Al (3 nm)/Gd26Fe74 (15 nm)/Pt (5 nm)/SiOx

Sputtering onto liquids: a critical review

• Anastasiya Sergievskaya,
• Adrien Chauvin and
• Stephanos Konstantinidis

Beilstein J. Nanotechnol. 2022, 13, 10–53, doi:10.3762/bjnano.13.2

• specific mechanism of NP production by SoL is discussed based on the detailed analysis of the effect of various experimental parameters on the size of NPs and their colloidal and oxidation stability in host liquid matrices. Furthermore, a carefully structured overview of all types of products produced by

Measurement of polarization effects in dual-phase ceria-based oxygen permeation membranes using Kelvin probe force microscopy

• Kerstin Neuhaus,
• Christina Schmidt,
• Liudmila Fischer,
• Wilhelm Albert Meulenberg,
• Ke Ran,
• Joachim Mayer and
• Stefan Baumann

Beilstein J. Nanotechnol. 2021, 12, 1380–1391, doi:10.3762/bjnano.12.102

• spinel or perovskite phase applicable in membrane reactors for partial oxidation reactions. Dual-phase membranes with FeCo2O4, or its iron-rich pendant Fe2CoO4, and Gd-doped ceria as an ion conductor have already been successfully applied as oxygen permeation membranes with high permeability in the

• partial oxidation reactions. Apart from Gd-doped ceria, Sm-doped ceria also could be an interesting alternative in this kind of composite due to its high ionic conductivity [17]. Obstacles that generally still need to be addressed for the application of dual-phase ceria-based membranes in such an

• temperatures above 400 °C. However, the implications of local oxidation and reduction for charge carrier mobility at lower temperatures are by far less well studied. Therefore, a combined polarization-KPFM experiment was performed on a dual-phase material consisting of 60 vol % Ce0.8Sm0.2O1.9 and 40 vol

Chemical vapor deposition of germanium-rich CrGe_x nanowires

• Vladislav Dřínek,
• Stanislav Tiagulskyi,
• Roman Yatskiv,
• Jan Grym,
• Radek Fajgar,
• Věra Jandová,
• Martin Koštejn and
• Jaroslav Kupčík

Beilstein J. Nanotechnol. 2021, 12, 1365–1371, doi:10.3762/bjnano.12.100

• species, Ar+ ion sputtering was used. The initial atomic elemental ratio was [Cr]/[Ge]/[O] = 1:7.33:11.61; after 90 s of Ar+ ion sputtering the ratio was [Cr]/[Ge]/[O] = 1:4.41:2.43. The presence of oxygen indicated oxidation after the experiment. The [Cr]/[Ge] atomic elemental ratio of 1:4.41 was

• ), which was in accordance with EDX measurements of a large area of the deposit. Ge 3d components (Figure 4a) showed elemental Ge/metal germanide (29.5, 29.0 eV) and a small amount of GeO (30.6 eV) formed by oxidation. The chromium Cr 2p3/2 peak was deconvoluted into a component at 574.4 eV and five

Biocompatibility and cytotoxicity in vitro of surface-functionalized drug-loaded spinel ferrite nanoparticles

• Sadaf Mushtaq,
• Khuram Shahzad,
• Tariq Saeed,
• Anwar Ul-Hamid,
• Bilal Haider Abbasi,
• Nafees Ahmad,
• Waqas Khalid,
• Muhammad Atif,
• Zulqurnain Ali and
• Rashda Abbasi

Beilstein J. Nanotechnol. 2021, 12, 1339–1364, doi:10.3762/bjnano.12.99

• , magnetite NPs have some serious limitations, such as chemical reactivity, rapid oxidation, particle agglomeration, and high surface energy which may affect their biocompatibility and performance [11]. Moreover, they have low magnetization at a smaller size and the presence of iron has been associated with

Identifying diverse metal oxide nanomaterials with lethal effects on embryonic zebrafish using machine learning

• Richard Liam Marchese Robinson,
• Haralambos Sarimveis,
• Philip Doganis,
• Xiaodong Jia,
• Marianna Kotzabasaki,
• Christiana Gousiadou,
• Stacey Lynn Harper and
• Terry Wilkins

Beilstein J. Nanotechnol. 2021, 12, 1297–1325, doi:10.3762/bjnano.12.97

• different oxidation states of the same metal were not considered in our dataset may also have resulted in a variable related purely to the metal atom identity being assigned elevated significance. Our finding that surface characteristics are of negligible importance, compared to core chemical composition is

Plasmon-enhanced photoluminescence from TiO₂ and TeO₂ thin films doped by Eu³⁺ for optoelectronic applications

• Marcin Łapiński,
• Jakub Czubek,
• Katarzyna Drozdowska,
• Anna Synak,
• Wojciech Sadowski and
• Barbara Kościelska

Beilstein J. Nanotechnol. 2021, 12, 1271–1278, doi:10.3762/bjnano.12.94

• been intensely studied for a few decades. Although Eu usually assumes a trivalent oxidation state (Eu3+), the divalent state (Eu2+) is also stable, but characterized by different luminescent properties. The Eu3+ emission spectrum consists of sharp lines, which are ascribed to 5D0→7FJ (J = 0–6

Morphology-driven gas sensing by fabricated fractals: A review

• Vishal Kamathe and
• Rupali Nagar

Beilstein J. Nanotechnol. 2021, 12, 1187–1208, doi:10.3762/bjnano.12.88

• study, Kante et al. prepared SnO2 films with fractal morphology by an electrochemical method with a subsequent oxidation process [68]. Both groups tested the films for CO gas sensing at different temperatures. Figure 8a–d shows the SEM images of SnO2 thin films on a Si(100) substrate obtained by Chen

• . 3D porous nanoscale hybrid SnO2/CuO foam sensors were prepared by Jeun et al. via electrochemical deposition followed by thermal oxidation [72]. These foam sensors were studied for H2S gas sensing. Figure 10a and Figure 10b show SEM images of the porous and 3D network structure of as-prepared Sn/Cu

• foam after electrodeposition. Figure 10c and Figure 10d illustrate the porous foam structure formed at 700 °C by thermal oxidation and the dendritic structures formed in pore wall. The foam sensor was able to detect down to 4 ppm of H2S. The highest gas response (S = 576) was obtained for 20 ppm of H2S

The effect of cobalt on morphology, structure, and ORR activity of electrospun carbon fibre mats in aqueous alkaline environments

• Markus Gehring,
• Tobias Kutsch,
• Osmane Camara,
• Alexandre Merlen,
• Hermann Tempel,
• Hans Kungl and
• Rüdiger-A. Eichel

Beilstein J. Nanotechnol. 2021, 12, 1173–1186, doi:10.3762/bjnano.12.87

• oxidation likely results in amorphous species explains the absence of reflexes attributed to oxidised species, such as Co3O4, CoO, or Co(OH)2, in the XRD diffractograms. This behaviour also explains the plateau in the cobalt metal values found for samples carbonised above 800 °C. At these temperatures the

Use of nanosystems to improve the anticancer effects of curcumin

• Andrea M. Araya-Sibaja,
• Norma J. Salazar-López,
• Krissia Wilhelm Romero,
• José R. Vega-Baudrit,
• J. Abraham Domínguez-Avila,
• Carlos A. Velázquez Contreras,
• Ramón E. Robles-Zepeda,
• Mirtha Navarro-Hoyos and
• Gustavo A. González-Aguilar

Beilstein J. Nanotechnol. 2021, 12, 1047–1062, doi:10.3762/bjnano.12.78

• , and high membrane permeability [80][81][82]. In particular, their stability tends to increase due to minimal exposure to ambient conditions (thereby delaying oxidation or degradation reactions), while their release may be regulated according to the use of different encapsulating materials [83

An overview of microneedle applications, materials, and fabrication methods

• Zahra Faraji Rad,
• Philip D. Prewett and
• Graham J. Davies

Beilstein J. Nanotechnol. 2021, 12, 1034–1046, doi:10.3762/bjnano.12.77

• by adsorption [92], with rates of release depending on interaction of the drug with the porous silicon. Oxidation, covalent binding, and electrostatic interactions can all be used to immobilise the drug on the porous silicon [94], while both hydrophilic and hydrophobic molecules can be loaded on