Biocatalytic oligomerization-induced self-assembly of crystalline cellulose oligomers into nanoribbon networks assisted by organic solvents

• Yuuki Hata,
• Yuka Fukaya,
• Toshiki Sawada,
• Masahito Nishiura and
• Takeshi Serizawa

Beilstein J. Nanotechnol. 2019, 10, 1778–1788, doi:10.3762/bjnano.10.173

• on an AXIMA 384-well plate and dried under ambient conditions. An AXIMA-performance instrument (Shimadzu) equipped with a nitrogen laser (λ = 337 nm) and pulsed ion extraction was used at an accelerating potential of 20 kV in linear positive ion mode to obtain mass spectra. The spectra were

• -mer species, and Mi is the molar mass of that species. For XRD measurements, the lyophilized products were pressed into pellets using a hand press. A D8 DISCOVER instrument (Bruker) with Cu Kα radiation (λ = 1.542 Å) was operated under ambient conditions to obtain the transmission XRD patterns and

• powdery state were used. The spectra were recorded on an FT/IR-4100 instrument (JASCO) at a cumulative measurement number of 100 and a resolution of 2.0 cm−1 under ambient conditions. For SEM observations, the water solvent of the hydrogels after purification was exchanged stepwise with 10, 20, 30, 40, 50

Kelvin probe force microscopy work function characterization of transition metal oxide crystals under ongoing reduction and oxidation

• Dominik Wrana,
• Karol Cieślik,
• Wojciech Belza,
• Christian Rodenbücher,
• Krzysztof Szot and
• Franciszek Krok

Beilstein J. Nanotechnol. 2019, 10, 1596–1607, doi:10.3762/bjnano.10.155

• splitting [1][44]. For industrial uses, the samples have to be exposed to ambient conditions, therefore it is necessary to investigate the impact of air exposure on electronic surface properties. Moreover, transition metal oxides are often regarded as promising materials for sensing applications, due to the

Development of a new hybrid approach combining AFM and SEM for the nanoparticle dimensional metrology

• Loïc Crouzier,
• Alexandra Delvallée,
• Sébastien Ducourtieux,
• Laurent Devoille,
• Guillaume Noircler,
• Christian Ulysse,
• Olivier Taché,
• Elodie Barruet,
• Christophe Tromas and
• Nicolas Feltin

Beilstein J. Nanotechnol. 2019, 10, 1523–1536, doi:10.3762/bjnano.10.150

• substrate under ambient conditions, since the area/volume ratio becomes important, capillary adhesion forces must be taken into account. Deformations of the silica NP and substrate can be assessed using the model developed by Derjaguin, Muller and Toporov (DMT) [33]. This model describes the elastic

Gas sensing properties of individual SnO₂ nanowires and SnO₂ sol–gel nanocomposites

• Alexey V. Shaposhnik,
• Dmitry A. Shaposhnik,
• Sergey Yu. Turishchev,
• Olga A. Chuvenkova,
• Stanislav V. Ryabtsev,
• Alexey A. Vasiliev,
• Xavier Vilanova,
• Francisco Hernandez-Ramirez and
• Joan R. Morante

Beilstein J. Nanotechnol. 2019, 10, 1380–1390, doi:10.3762/bjnano.10.136

• ambient conditions containing ammonia, where the sensor was also kept for one hour. As shown in Figure 9, both sensing devices demonstrated stable readings, the background air resistance maintained a constant value, and long-term drift of the zero line was not observed. The response of the device

Nanoscale spatial mapping of mechanical properties through dynamic atomic force microscopy

• Zahra Abooalizadeh,
• Leszek Josef Sudak and
• Philip Egberts

Beilstein J. Nanotechnol. 2019, 10, 1332–1347, doi:10.3762/bjnano.10.132

• result of the deformation and buckling of the step edge as the tip traversed to the higher level terrace. While the observations in [25] were acquired under humid, ambient conditions, which can significantly influence the lateral forces measured at step edges [15], our measurement, under UHV conditions

Multicomponent bionanocomposites based on clay nanoarchitectures for electrochemical devices

• Giulia Lo Dico,
• Bernd Wicklein,
• Lorenzo Lisuzzo,
• Giuseppe Lazzara,
• Pilar Aranda and
• Eduardo Ruiz-Hitzky

Beilstein J. Nanotechnol. 2019, 10, 1303–1315, doi:10.3762/bjnano.10.129

• bionanocomposite foams was estimated from the skeletal density using the following values: SEP = 2.3 g·mL−1, HNTs = 2.2 g·mL−1, GNPs = 2.3 g·mL−1, MWCNTs = 2.1 g·mL−1, chitosan = 0.2 g·mL−1. The mechanical properties of the films and foams were assessed under ambient conditions by using a universal test machine

Green fabrication of lanthanide-doped hydroxide-based phosphors: Y(OH)₃:Eu³⁺ nanoparticles for white light generation

• Tugrul Guner,
• Anilcan Kus,
• Mehmet Ozcan,
• Aziz Genc,
• Hasan Sahin and
• Mustafa M. Demir

Beilstein J. Nanotechnol. 2019, 10, 1200–1210, doi:10.3762/bjnano.10.119

• -micrometer-sized Y(OH)3:Eu3+ particles (as red phosphor) were synthesized in water at ambient conditions in ≤60 min reaction time. The doping ratio was controlled from 2.5–20 mol %. Additionally, first principle calculations were performed on Y(OH)3:Eu3+ to understand the preferable doping scenario and its

• during the emulsion process, which makes this method inefficient in terms of cost and toxicity [35]. Therefore, facile synthesis methods involving water-based reactions at ambient conditions are needed for phosphor fabrication. In this study, a promising strategy has been introduced in order to meet

• method was developed in this study. As an application, the red emitting phosphor has been fabricated at ambient conditions in a short time. This method can be a promising strategy for fabricating phosphors to be employed as down-converting materials for pc-converted WLED systems [33][40][41][42][43

Influence of dielectric layer thickness and roughness on topographic effects in magnetic force microscopy

• Alexander Krivcov,
• Jasmin Ehrler,
• Marc Fuhrmann,
• Tanja Junkers and
• Hildegard Möbius

Beilstein J. Nanotechnol. 2019, 10, 1056–1064, doi:10.3762/bjnano.10.106

• substrate is increased. The theoretical model described in this paper also predicts decreasing topographic effects in MFM signals due to surface roughness of dielectric films with increasing film thickness. Experimental The MFM measurements in this work were carried out under ambient conditions using a

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

• phase images) under ambient conditions. The TNW specific surface area (s) was determined via the multipoint Brunauer–Emmett–Teller method (BET) using N2 at 77 K and relative pressure in the range 0.05–0.3 (Micrometrics Instrument Corporation, Gemini V series surface area analyzer). A more detailed

Capillary force-induced superlattice variation atop a nanometer-wide graphene flake and its moiré origin studied by STM

• Loji K. Thomas and
• Michael Reichling

Beilstein J. Nanotechnol. 2019, 10, 804–810, doi:10.3762/bjnano.10.80

• ambient conditions. A further verification of the moiré assumption is possible by direct measurement of the orientation of the flake with a reference direction before and after rotation. If the assumption of the moiré rotation is right, one should, in addition to the agreement in the periodicities in the

• . Experimental STM imaging: A freshly cleaved sample of highly oriented pyrolytic graphite (HOPG, ZYB grade, SPI supplies, West Chester, PA, USA) was used. STM images were taken in the constant-current mode under ambient conditions with a compact STM (easyScan, Nanosurf AG, Liestal, Switzerland). Mechanically

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

• applications, the stability of nanocomposites under ambient conditions is a key factor. Here, we measured zeta potential and the particle-size distribution for all stages of nanocomposite synthesis. The measurements were made in citric buffer (pH 4.4), in water (pH 6.2), and Tris buffer (pH 8.5) (Figure 1E

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

• substrates using an optical tensiometer (Theta Lite) purchased from Attension. Average values and error are calculated from four measurements performed at different positions of each sample. Atomic force microscopy (AFM) imaging was conducted on a NTEGRA Aura microscope from NT-MDT under ambient conditions

Review of time-resolved non-contact electrostatic force microscopy techniques with applications to ionic transport measurements

• Aaron Mascaro,
• Yoichi Miyahara,
• Tyler Enright,
• Omur E. Dagdeviren and
• Peter Grütter

Beilstein J. Nanotechnol. 2019, 10, 617–633, doi:10.3762/bjnano.10.62

• improvement over many other time-resolved EFM variations that require lengthy averaging times, which makes spatial mapping difficult and time consuming. Challenges and application to ionic transport measurements Thus far, measurements using this technique have only been performed under ambient conditions and

Topochemical engineering of composite hybrid fibers using layered double hydroxides and abietic acid

• Liji Sobhana,
• Lokesh Kesavan,
• Jan Gustafsson and
• Pedro Fardim

Beilstein J. Nanotechnol. 2019, 10, 589–605, doi:10.3762/bjnano.10.60

• min under ambient conditions to allow for the grafting between LDH and AA. Then the handsheets were gently taken out and allowed to dry at room temperature. Characterization Optical microscopy analysis: An optical microscope Nikon Eclipse E200 combined with a Nikon DS-Fi2 digital camera was used to

Biomimetic synthesis of Ag-coated glasswing butterfly arrays as ultra-sensitive SERS substrates for efficient trace detection of pesticides

• Guochao Shi,
• Mingli Wang,
• Yanying Zhu,
• Yuhong Wang,
• Xiaoya Yan,
• Xin Sun,
• Haijun Xu and
• Wanli Ma

Beilstein J. Nanotechnol. 2019, 10, 578–588, doi:10.3762/bjnano.10.59

• , the long-term stability of Ag-G.b.-20 substrates was examined under ambient conditions. Figure 5a shows the Raman spectra of 10−4 M CV recorded on the Ag-G.b.-20 substrates and the corresponding substrates stored for 15, 30, 45 and 60 days. Figure 5b clearly reveals that the integrated Raman intensity

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

• , already reported for semiconductor chemoresistors. From an applications perspective, the range of nitrogen dioxide concentrations tested here (tens of ppm) is still too high for monitoring this species in ambient conditions (tens of ppb). However, there is room for improving these results, for example, by

Mo-doped boron nitride monolayer as a promising single-atom electrocatalyst for CO₂ conversion

• Qianyi Cui,
• Gangqiang Qin,
• Weihua Wang,
• Lixiang Sun,
• Aijun Du and
• Qiao Sun

Beilstein J. Nanotechnol. 2019, 10, 540–548, doi:10.3762/bjnano.10.55

• ambient conditions. Keywords: boron nitride monolayer; CO2 conversion; density functional theory; single-atom electrocatalyst; Introduction In the past decades, considerable carbon dioxide emissions into the atmosphere due to large-scale anthropogenic industrial manufacturing have resulted in global

• most non-noble metal catalysts to selectively produce CH4. Therefore, the study demonstrates a potential electrocatalyst employing a non-noble metal with high catalytic efficiency for conversion CO2 into useful fuel under ambient conditions. This work provides important information at the atomic level

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

• transferred in hexadecane (4 g) to obtain a final concentration of 1 × 10−4 M. Afterwards, THF was completely removed by rotary evaporation (1 h at 70 mbar and 50 °C). Synthesis of carboxyl-functionalized nanocapsules Polystyrene nanocapsules were synthesized either under ambient conditions (sample NC) or

• Lasertechnik GmbH, ADL-63201TL) with an excitation intensity of 0.2 W·cm−2. It is important to note that all fluorescence emission measurements were carried out by using the same batch of nanocapsules at the same capsule content. A first batch of nanocapsules was prepared under ambient conditions and an

• nanocapsules (labeled as sample NC) were prepared under ambient conditions by free radical miniemulsion polymerization of styrene and acrylic acid. The thickness of the shell of the formed nanocapsules was ca. 20 nm in average, and the weight ratio polymer/hexadecane was ca. 1:2. The fluorescent dye was

Polymorphic self-assembly of pyrazine-based tectons at the solution–solid interface

• Achintya Jana,
• Puneet Mishra and
• Neeladri Das

Beilstein J. Nanotechnol. 2019, 10, 494–499, doi:10.3762/bjnano.10.50

• realizable application. On the other hand, exploring molecular functionalities under ambient conditions on technologically relevant two-dimensional surfaces such as graphene or MoS2 is highly desirable for realizing the full potential of molecules for a diverse range of devices [7][8][9][10][11]. At room

• –HOPG interface using scanning tunneling microscopy (STM) technique under ambient conditions. The molecules belong to a new class of pyrazine/triazine-based molecules, containing two or more pyridine pendant units, and can act as a precursor to several two- and three-dimensional supramolecular

• lattice parameters as well as the number, type, and orientation of molecules within a unit cell. In general, the STM experiments conducted under ambient conditions are prone to thermal drift and suffer from piezo creep and hysteresis. To overcome this limitation, the acquired STM images were corrected by

Improving control of carbide-derived carbon microstructure by immobilization of a transition-metal catalyst within the shell of carbide/carbon core–shell structures

• Teguh Ariyanto,
• Jan Glaesel,
• Andreas Kern,
• Gui-Rong Zhang and
• Bastian J. M. Etzold

Beilstein J. Nanotechnol. 2019, 10, 419–427, doi:10.3762/bjnano.10.41

• grid (G200F1, Quantifoil), followed by drying under ambient conditions. XRD patterns were recorded using a Philips X’pert Pro by PANalytical, Netherlands (40 kV and 40 mA using Cu Ka radiation). The XRD diffractograms were recorded in the 2θ range of 2–80° in steps of 0.03° with an acquisition time of

Advanced scanning probe lithography using anatase-to-rutile transition to create localized TiO₂ nanorods

• Julian Kalb,
• Vanessa Knittel and
• Lukas Schmidt-Mende

Beilstein J. Nanotechnol. 2019, 10, 412–418, doi:10.3762/bjnano.10.40

• for 256 times (128 times in each direction) in order to generate a sufficient amount of seeds. The technique was performed under ambient conditions with a writing speed of 10 μm/s (scan frequency: 0.5 Hz; line length: 10 μm). After seed generation, the samples were placed top-side down in a Teflon

• cantilever arrays [47]. Besides these technically challenges, there are some clear advantages of this method. First, it works under ambient conditions, and the setup is inexpensive compared to electron-beam lithography. Nevertheless, the resolution is roughly of the same order of magnitude. Second, it is a

• charging and silicon dusk particles could be excluded. It was demonstrated that the activation can be erased with an intensive electron beam. Compared to other lithography methods with similar resolutions, this technique is quite inexpensive and can be applied under ambient conditions. Therefore, it

Integration of LaMnO_3+δ films on platinized silicon substrates for resistive switching applications by PI-MOCVD

• Raquel Rodriguez-Lamas,
• Dolors Pla,
• Odette Chaix-Pluchery,
• Benjamin Meunier,
• Fabrice Wilhelm,
• Andrei Rogalev,
• Laetitia Rapenne,
• Xavier Mescot,
• Quentin Rafhay,
• Hervé Roussel,
• Michel Boudard,
• Carmen Jiménez and
• Mónica Burriel

Beilstein J. Nanotechnol. 2019, 10, 389–398, doi:10.3762/bjnano.10.38

• under ambient conditions within a Faraday cage with microprobe manipulators using a B1500 Agilent semiconductor parameter analyzer. Results and Discussion Dense and homogeneous LaMnO3+δ (LMO) thin films with variable oxygen content (δ) have been deposited by pulsed injection metal organic chemical

Raman study of flash-lamp annealed aqueous Cu₂ZnSnS₄ nanocrystals

• Yevhenii Havryliuk,
• Oleksandr Selyshchev,
• Mykhailo Valakh,
• Alexandra Raevskaya,
• Oleksandr Stroyuk,
• Constance Schmidt,
• Volodymyr Dzhagan and
• Dietrich R. T. Zahn

Beilstein J. Nanotechnol. 2019, 10, 222–227, doi:10.3762/bjnano.10.20

• , can be performed under ambient conditions, making this procedure even more suitable for mass production. Experimental The synthesis of the CZTS NCs used in this work and the basic characterization by UV–vis, XRD, Raman spectroscopy and TEM were reported by us previously [21]. Shortly, the CZTS NCs

Threshold voltage decrease in a thermotropic nematic liquid crystal doped with graphene oxide flakes

• Mateusz Mrukiewicz,
• Krystian Kowiorski,
• Paweł Perkowski,
• Rafał Mazur and
• Małgorzata Djas

Beilstein J. Nanotechnol. 2019, 10, 71–78, doi:10.3762/bjnano.10.7

• <10 nm. The AFM examination was carried out in air, under ambient conditions. The data analysis was conducted with IgorPro (V. 6.17, professional, dedicated software provided by the microscope producer). The measured thickness was around 1–2 nm (Figure 2b), which corresponds to 2–4 single layers of

Contact splitting in dry adhesion and friction: reducing the influence of roughness

• Jae-Kang Kim and
• Michael Varenberg

Beilstein J. Nanotechnol. 2019, 10, 1–8, doi:10.3762/bjnano.10.1

• . The tests were carried out in a custom tribometer [47] able to measure pull-off and friction forces in ambient conditions as well as inside a Quanta 250 environmental SEM (FEI, Brno, Czech Republic). In this work, all force measurements were performed outside the SEM and the latter was used only to