Luminescent supramolecular hydrogels from a tripeptide and nitrogen-doped carbon nanodots

• Maria C. Cringoli,
• Slavko Kralj,
• Marina Kurbasic,
• Massimo Urban and
• Silvia Marchesan

Beilstein J. Nanotechnol. 2017, 8, 1553–1562, doi:10.3762/bjnano.8.157

• quartz cell was used on a Jasco J815 spectropolarimeter, with 1 s integration time, 1 accumulation, and a step size of 1 nm with a bandwidth of 1 nm over a wavelength range of 200–250 nm. The samples were freshly prepared directly in the CD cell and the spectra were immediately recorded. The spectra were

Low-temperature CO oxidation over Cu/Pt co-doped ZrO₂ nanoparticles synthesized by solution combustion

• Amit Singhania and
• Shipra Mital Gupta

Beilstein J. Nanotechnol. 2017, 8, 1546–1552, doi:10.3762/bjnano.8.156

• nARCOS, Simultaneous ICP-AES spectrometer. Catalytic activity The CO oxidation reaction was carried out in a quartz vertical fixed-bed reactor. The prepared nanoparticles (0.5 g) were put in the quartz reactor and CO oxidation reaction was carried out at different temperatures. To simulate off-gas

Formation of ferromagnetic molecular thin films from blends by annealing

• Peter Robaschik,
• Ye Ma,
• Salahud Din and
• Sandrine Heutz

Beilstein J. Nanotechnol. 2017, 8, 1469–1475, doi:10.3762/bjnano.8.146

• of the molecule of interest. Experimental Organic thin films have been grown using a SPECTROS deposition chamber by Kurt J. Lesker Company with a base pressure of 3 × 10−7 mbar. During the co-deposition in total three quartz crystal microbalances (QCM) were utilised to achieve a one-to-one ratio of

• the molecules. Two QCMs monitored the deposition rate of each organic source and the combined rate was confirmed by a third QCM next to the substrates. The annealing procedure was carried out in a furnace (Carbolite HZS-12/900E) fitted with a 150 cm long quartz tube (3 cm outer diameter). For the

Fabrication of hierarchically porous TiO₂ nanofibers by microemulsion electrospinning and their application as anode material for lithium-ion batteries

• Jin Zhang,
• Yibing Cai,
• Xuebin Hou,
• Xiaofei Song,
• Pengfei Lv,
• Huimin Zhou and
• Qufu Wei

Beilstein J. Nanotechnol. 2017, 8, 1297–1306, doi:10.3762/bjnano.8.131

• distance of 15 cm. The flow rate of the spinning solution was maintained at 2 mL·h−1. The as-spun nanofibers with TBT/paraffin oil ratios of 2.25, 1.9 and 1.55 were marked as sample A1, sample B1 and sample C1, respectively. Subsequently, the as-spun nanofibrous mats were calcined in a quartz tube furnace

Oxidative chemical vapor deposition of polyaniline thin films

• Yuriy Y. Smolin,
• Masoud Soroush and
• Kenneth K. S. Lau

Beilstein J. Nanotechnol. 2017, 8, 1266–1276, doi:10.3762/bjnano.8.128

• target thickness of 250 nm were deposited on silicon wafers and quartz glass substrates, which were placed on a stage controlled at 90 °C (Ts) using backside contact with a recirculating thermal fluid (distilled H2O). oCVD processing conditions were then systematically varied from the base case

• , respectively. Results and Discussion FTIR of as-deposited oCVD PANI films Based on the oCVD approach, uniform PANI film depositions were performed on quartz glass substrates, and as seen in Figure 2b, the deposited films can have a vivid green or deep blue color depending on the oCVD conditions. Qualitatively

• deposited on quartz glass (1” × 1”) showing the emeraldine (green) and pernigraniline (blue) states. The uncoated portion was masked by tape during deposition. FTIR of as-deposited oCVD PANI films based on the experimental conditions in Table 1. Effect of (a) reactor pressure, (b) oxidant flow rate, and (c

Evaluation of quantum dot conjugated antibodies for immunofluorescent labelling of cellular targets

• Jennifer E. Francis,
• David Mason and
• Raphaël Lévy

Beilstein J. Nanotechnol. 2017, 8, 1238–1249, doi:10.3762/bjnano.8.125

• of Qdot 625, and ε is the extinction coefficient of Qdot 625 (500,000 M−1·cm−1). The absorbance between 605–612 nm (step 10 nm) was measured to be 1.5 a.u. using a quartz cuvette with a 1 cm path length, on a SpectraMax 34 Plus spectrophotometer (Molecular Devices, UK). Immunofluorescence An overview

Ultrasmall magnetic field-effect and sign reversal in transistors based on donor/acceptor systems

• Thomas Reichert and
• Tobat P. I. Saragi

Beilstein J. Nanotechnol. 2017, 8, 1104–1114, doi:10.3762/bjnano.8.112

• ) between Spiro-TTB and HAT-CN are 21:79, 51:49 and 78:22, respectively. The evaporation rates were monitored by two independent oscillating quartz-sensors. The uncertainty of our deposition process is ±2.5%. From the vacuum chamber, the samples were directly transferred to a glove box (O2, H2O < 0.1 ppm

Fully scalable one-pot method for the production of phosphonic graphene derivatives

• Kamila Żelechowska,
• Marta Prześniak-Welenc,
• Marcin Łapiński,
• Izabela Kondratowicz and
• Tadeusz Miruszewski

Beilstein J. Nanotechnol. 2017, 8, 1094–1103, doi:10.3762/bjnano.8.111

• Elmer Frontier spectrophotometer with resolution of 2 cm−1 in the range of 500–4000 cm−1. UV–vis spectra were measured using a Perkin Elmer Lambda 10 with 1 cm quartz cuvette. Raman spectra were recorded using a Renishaw InVia spectroscope with argon ion laser operating at 514.5 nm focused through a 50

Structural properties and thermal stability of cobalt- and chromium-doped α-MnO₂ nanorods

• Romana Cerc Korošec,
• Polona Umek,
• Alexandre Gloter,
• Jana Padežnik Gomilšek and
• Peter Bukovec

Beilstein J. Nanotechnol. 2017, 8, 1032–1042, doi:10.3762/bjnano.8.104

• by coupling the TGA/DSC1 Instrument with a quadrupole mass spectrometer Thermostar (Balzers). In this case, the initial mass of the sample was around 5 mg. Evolved gases were transferred via heated quartz capillary (T = 190 °C) to the entrance of the mass spectrometer. X-ray diffractograms of the

Tuning the spin coherence time of Cu(II)−(bis)oxamato and Cu(II)−(bis)oxamidato complexes by advanced ESR pulse protocols

• Ruslan Zaripov,
• Evgeniya Vavilova,
• Iskander Khairuzhdinov,
• Kev Salikhov,
• Violeta Voronkova,
• Mohammad A. Abdulmalic,
• Francois E. Meva,
• Saddam Weheabby,
• Tobias Rüffer,
• Bernd Büchner and
• Vladislav Kataev

Beilstein J. Nanotechnol. 2017, 8, 943–955, doi:10.3762/bjnano.8.96

• in fused quartz has been made. The shift of the ESR resonance frequency can be written in the form Δω = ∑AkMk, where Ak and Mk are the HF constant and the projection of the k-th nuclear spin on the direction of the external magnetic field. For a number of reasons the projection Mk can stochastically

Energy-level alignment at interfaces between manganese phthalocyanine and C₆₀

• Daniel Waas,
• Florian Rückerl,
• Martin Knupfer and
• Bernd Büchner

Beilstein J. Nanotechnol. 2017, 8, 927–932, doi:10.3762/bjnano.8.94

• evaporators. The film thickness was monitored by a quartz crystal microbalance and additionally determined using the intensity change of the Au 4f7/2 core level peak according to the method established by Seah and Dench [44]. We have grown the interfaces under investigation by both deposition sequences, MnPc

Triptycene-terminated thiolate and selenolate monolayers on Au(111)

• Jinxuan Liu,
• Martin Kind,
• Björn Schüpbach,
• Daniel Käfer,
• Stefanie Winkler,
• Wenhua Zhang,
• Andreas Terfort and
• Christof Wöll

Beilstein J. Nanotechnol. 2017, 8, 892–905, doi:10.3762/bjnano.8.91

• monitored using a quartz crystal microbalance. Substrates for thermal desorption spectroscopy measurements were gold covered mica sheets. Freshly cleaved mica sheets (Mahlwerk Neubauer - Friedrich Geffers) were heated to 280 °C for about two days inside the evaporation chamber to remove residual water and

Optimizing qPlus sensor assemblies for simultaneous scanning tunneling and noncontact atomic force microscopy operation based on finite element method analysis

• Omur E. Dagdeviren and
• Udo D. Schwarz

Beilstein J. Nanotechnol. 2017, 8, 657–666, doi:10.3762/bjnano.8.70

• , Yale University, New Haven, CT 06520, USA 10.3762/bjnano.8.70 Abstract Quartz tuning forks that have a probe tip attached to the end of one of its prongs while the other prong is arrested to a holder (“qPlus” configuration) have gained considerable popularity in recent years for high-resolution atomic

• ; noncontact atomic force microscopy; quartz tuning forks; scanning tunneling microscopy; self-sensing probe; Introduction Scanning tunneling microscopy (STM) [1] and non-contact atomic force microscopy (NC-AFM) [1][2][3] are powerful methods allowing the visualization of the atomic structure of a surface

• information, when a conducting probe is attached to the end of the oscillator [5][6][7][8][9][10][11]. Towards this end, microfabricated cantilevers [15][16][17], length-extension resonators [18][19][20], and quartz tuning forks in the so-called “qPlus” configuration, in which one of the prongs of the fork is

Graphene functionalised by laser-ablated V₂O₅ for a highly sensitive NH₃ sensor

• Margus Kodu,
• Artjom Berholts,
• Tauno Kahro,
• Mati Kook,
• Peeter Ritslaid,
• Helina Seemen,
• Tea Avarmaa,
• Harry Alles and
• Raivo Jaaniso

Beilstein J. Nanotechnol. 2017, 8, 571–578, doi:10.3762/bjnano.8.61

• sensor substrate was evaluated using X-ray fluorescence (XRF) analysis by measuring the amount of vanadium in the film deposited onto a fused quartz substrate under the identical PLD procedure. According to XRF, the mass thickness of vanadium on the substrate was 0.11 µg/cm2. Presuming that all of the

• quartz substrate for the evaluation of the mass thickness of the deposited layer in the XRF experiment. The structural characterization of graphene was performed by using a micro-Raman spectroscopic system (Renishaw, inVia) with an excitation wavelength of 514 nm. The vanadium concentration in the

Impact of air exposure and annealing on the chemical and electronic properties of the surface of SnO₂ nanolayers deposited by rheotaxial growth and vacuum oxidation

• Monika Kwoka and
• Maciej Krzywiecki

Beilstein J. Nanotechnol. 2017, 8, 514–521, doi:10.3762/bjnano.8.55

• structure of the layers as well as the post-exposition-related contamination. The studies are augmented with surface topography investigations using atomic force microscopy (AFM) in order to check the porosity of the resulting layer. Experimental The RGVO SnO2 nanolayers (20 nm, quartz microbalance

The longstanding challenge of the nanocrystallization of 1,3,5-trinitroperhydro-1,3,5-triazine (RDX)

• Florent Pessina and
• Denis Spitzer

Beilstein J. Nanotechnol. 2017, 8, 452–466, doi:10.3762/bjnano.8.49

• deposition of ammonium nitrate (AN), RDX and a composite AN–RDX was performed on a cooled quartz substrate. The mean particle diameter was directly measured from atomic force microscopy (AFM): a diameter of 50 nm was obtained for the three materials, even after processing the nanopowder (removal from the

• quartz substrate and pressing into tablets). Mil’chenko et al. [41] delved further in the physical vapor deposition (PVD) process with the deposition of 2,4,6-triamino-1,3,5-trinitrobenzene (TATB), HMX, RDX, PETN and BTF as thin layers on several substrates such as plexiglas and copper while changing

Multimodal cantilevers with novel piezoelectric layer topology for sensitivity enhancement

• Steven Ian Moore,
• Michael G. Ruppert and
• Yuen Kuan Yong

Beilstein J. Nanotechnol. 2017, 8, 358–371, doi:10.3762/bjnano.8.38

• was shown that these higher modes can be more sensitive to material properties such as elastic modulus and damping coefficients [17][18][19]. Additionally, stiff cantilevers have proven to provide high resolution imaging in ambient and liquid environments using quartz resonators [20][21]. Traditional

Nanoscale isoindigo-carriers: self-assembly and tunable properties

• Tatiana N. Pashirova,
• Andrei V. Bogdanov,
• Lenar I. Musin,
• Julia K. Voronina,
• Irek R. Nizameev,
• Marsil K. Kadirov,
• Vladimir F. Mironov,
• Lucia Ya. Zakharova,
• Shamil K. Latypov and
• Oleg G. Sinyashin

Beilstein J. Nanotechnol. 2017, 8, 313–324, doi:10.3762/bjnano.8.34

• measured at 495 nm using the spectrophotometer Specord 250 Plus (Analytik Jena AG, Germany). Quartz cuvettes containing sample were used, with a 0.1 cm cell path. For the solubilization studies of compounds 1–3, saturated solutions were prepared in glass vessels by mixing of the excess of powdered

• , Germany). Quartz cuvettes with a 1 cm cell path were used. Dynamic light scattering Dynamic light scattering (DLS) measurements were performed using the Malvern Instrument Zetasizer Nano (Worcestershire, UK). The measured autocorrelation functions were analysed by Malvern DTS software, applying the second

• 2a–h were recorded at 25 °C on a Varian Cary Eclipse spectrofluorimeter (Varian, Inc., California, USA) with an excitation wavelength for pyrene at 335 nm using 1 cm path length quartz cuvettes. Emission spectra were recorded in the range of 350–500 nm. Transmission electron microscopy (TEM

Nanocrystalline ZrO₂ and Pt-doped ZrO₂ catalysts for low-temperature CO oxidation

• Amit Singhania and
• Shipra Mital Gupta

Beilstein J. Nanotechnol. 2017, 8, 264–271, doi:10.3762/bjnano.8.29

• vertically fixed quartz reactor, which was maintained at temperature of 90 °C. The stability test results show a constant CO conversion during the test, which indicates the excellent stability of Pt(1%)-ZrO2. The obtained results are due to improvement in thermal stability of the catalyst by the introduction

• spectrometer using KBr pellets in the range 500–4000 cm−1. Catalytic activity The CO oxidation reaction was performed in a quartz reactor (inner diameter of 14 mm) under atmospheric pressure. 0.5 g of catalyst was inserted into the quartz tube. The reaction was carried out at different temperatures. For

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

• interpreted the R and T measurements in terms of the Fresnel formulae [24], regardless of the effects of depolarization due to the roughness and non-uniformity of the surface. We assumed that the sample is constituted by two layers on a quartz substrate, namely a titanium oxide layer and a metallic titanium

• layer (from the top to the bottom). A schematic view is shown as inset in Figure 5. The refractive indexes of the three layers (TiO2/Ti/quartz) were calculated separately. For the quartz substrate it was assumed to be 1.5 [25]. The refractive index of the metallic film was extracted by fitting the

• sputtered on quartz substrates by ultra-high vacuum magnetron sputtering from a Ti target of 99.99% purity. The Ti samples (1 cm × 1 cm in size) were put into 3 mL H2O2 (30%) solution at 60 °C for different etching times. Afterwards, the samples were rinsed with deionized water and dried in air. SEM

Nitrogen-doped twisted graphene grown on copper by atmospheric pressure CVD from a decane precursor

• Ivan V. Komissarov,
• Nikolai G. Kovalchuk,
• Vladimir A. Labunov,
• Ksenia V. Girel,
• Olga V. Korolik,
• Mikhail S. Tivanov,
• Algirdas Lazauskas,
• Mindaugas Andrulevičius,
• Tomas Tamulevičius,
• Viktoras Grigaliūnas,
• Šarunas Meškinis,
• Sigitas Tamulevičius and
• Serghej L. Prischepa

Beilstein J. Nanotechnol. 2017, 8, 145–158, doi:10.3762/bjnano.8.15

• with a 14 mm diameter tubular quartz reactor was employed for the experiment. Polycrystalline copper foil (99.9% purity, proved by the EDX study) with a thickness of 60 μm was used as the catalyst. Prior to the APCVD, the foil was electrochemically polished for 5 min in 1 M phosphoric acid at a bias

• introduced into the tubular quartz reactor via barbotage system for 30 min. The feeding rate of n-decane was estimated to be 4 μL/min (for both samples). Afterwards, the tubular quartz reactor was cooled at a rate of 50 °C/min in the presence of N2 gas flow. The obtained properties of samples A and B are

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

• variable temperature (VT) scanning tunneling microscope (STM), an ion gun, an effusion cell manufactured by Kentax GmbH, and a quartz crystal microbalance. The base pressure in the system was kept at 1 × 10−10 mbar. The rutile TiO2(011) samples purchased from MaTeck were prepared in a standard procedure by

Impact of surface wettability on S-layer recrystallization: a real-time characterization by QCM-D

• Jagoba Iturri,
• Ana C. Vianna,
• Alberto Moreno-Cencerrado,
• Dietmar Pum,
• Uwe B. Sleytr and
• José Luis Toca-Herrera

Beilstein J. Nanotechnol. 2017, 8, 91–98, doi:10.3762/bjnano.8.10

• (USP), Faculty of Philosophy, Science and Letters of Ribeirao Preto (FFCLRP), Department of Chemistry, Ribeirao Preto, SP, Brazil 10.3762/bjnano.8.10 Abstract Quartz crystal microbalance with dissipation monitoring (QCM-D) has been employed to study the assembly and recrystallization kinetics of

• : bacterial S-layers; Quartz crystal microbalance with dissipation monitoring (QCM-D); recrystallization kinetics; surface wettability; Introduction Crystalline bacterial protein layers (S-layers) are arrays of (glyco)proteins (Mw of 40 to 200 kDa) forming the outermost envelope of prokaryotes, and represent

• obtained. The importance of such factors for the morphology and biological function of isolated proteins has been already shown in literature [16]. In this regard, the quartz crystal microbalance with dissipation monitoring (QCM-D) has proven to be a powerful technique to follow in situ the binding of S

Surface-enhanced Raman scattering of self-assembled thiol monolayers and supported lipid membranes on thin anodic porous alumina

• Marco Salerno,
• Amirreza Shayganpour,
• Barbara Salis and
• Silvia Dante

Beilstein J. Nanotechnol. 2017, 8, 74–81, doi:10.3762/bjnano.8.8

• during the second step, were independently monitored by using a quartz crystal microbalance with dissipation monitoring (QCM-D) technique. The SLB membranes represent a simplified model system of the living cells membranes, which makes the successful observation of SERS on these films promising in view

• subscripts, SERS and Ref, indicate SERS and Raman measurements on tAPA–Au and on flat Au substrates, respectively. QCM-D characterization of adsorption A quartz microbalance Z500 (KSV Instruments, Finland) was used for the QCM-D experiments. Au coated AT-cut quartz crystals (QSense, Sweden) with a 5 MHz

• fundamental resonance frequency were used. Before each experiment, the quartz sensor was first cleaned in a UV/Ozone ProCleaner (BioForce Nanoscience, US) for 10 min, then washed with milli-Q (18.2 MΩ·cm resistivity) water, dried under nitrogen flux and cleaned again for 10 min in the ozone cleaner. The

Annealing-induced recovery of indents in thin Au(Fe) bilayer films

• Anna Kosinova,
• Ruth Schwaiger,
• Leonid Klinger and
• Eugen Rabkin

Beilstein J. Nanotechnol. 2016, 7, 2088–2099, doi:10.3762/bjnano.7.199

• × 100 nanoimprints, so that the distance between the imprints was 1 µm. For both loading conditions, the penetration depth was significantly lower than the film thickness. The indented samples were annealed in a quartz tube resistance furnace under forming gas flow (Ar + 10% H2, 99.999% pure) at a

• temperature of 700 °C for the consecutive time intervals of 10, 10, 10, 20, 60 and 180 min. The samples were placed in a quartz boat and introduced to the hot zone of the furnace by a mechanical manipulator. The heating time of the boat containing the sample from room temperature to 700 °C was 3 min, followed