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

• aqueous solutions. In addition, the technique of magnetron sputtering has been used to deposit Ag nanostructures on the surface of TiO2 nanotube arrays. It is worth mentioning that Enachi et al. [25] heat-treated the TiO2 nanotube arrays after the deposition of Ag film of 50 nm on the top surface of TiO2

• nanotubes prepared by the methods involving aqueous solutions, Ag nanocrystals were formed on the outmost surface of TiO2 nanotubes. There probably were hardly any Ag nanocrystals formed inside the TiO2 nanotubes through the migration of Ag. Such a result reveals that Ag atoms prefer to migrate/diffuse on

The influence of phthalocyanine aggregation in complexes with CdSe/ZnS quantum dots on the photophysical properties of the complexes

• Irina V. Martynenko,
• Anna O. Orlova,
• Vladimir G. Maslov,
• Anatoly V. Fedorov,
• Kevin Berwick and
• Alexander V. Baranov

Beilstein J. Nanotechnol. 2016, 7, 1018–1027, doi:10.3762/bjnano.7.94

• acquire a negative charge. Therefore, mixing of aqueous solutions of DMAET QDs and PcSz leads to the formation of QD–DMAET–PcSz complexes as a result of the electrostatic interaction between phthalocyanine and positive DMAET solubilizer molecules on the surface of the QDs. Figure 1b shows the scheme of

• [38][39] using Rhodamine 6G in ethanol (φR = 0.95) [45] as a reference fluorophore. Photosens® has a PL QY of ca. 12% in aqueous solution [41]. The QD samples have a PL QY > 20% in hydrophobic solvents and of about 10% in aqueous solutions. Light with wavelengths of 475 and 640 nm was used for PL

Reconstitution of the membrane protein OmpF into biomimetic block copolymer–phospholipid hybrid membranes

• Matthias Bieligmeyer,
• Franjo Artukovic,
• Stephan Nussberger,
• Thomas Hirth,
• Thomas Schiestel and
• Michaela Müller

Beilstein J. Nanotechnol. 2016, 7, 881–892, doi:10.3762/bjnano.7.80

• (DPhPC). To vary the membrane thickness, PIPEO with three different molecular weights were chosen from a library of various PIPEO, which we had synthesized in an attempt to design new amphiphilic molecules that self-assemble in aqueous solutions into membranes (unpublished results). PIPEO was used

• -block-ethylene oxide) block copolymers (PIPEO) were designed at poly(isoprene) (PI) to poly(ethylene oxide) (PEO) ratios that are known to foster the formation of polymeric bilayers in aqueous solutions [19][20][51]. The three copolymers PIPEO877 (1), PIPEO1530 (2) and PIPEO3188 (3) were synthesized

• monomer-activated approach [52]. However, an incomplete initiation of the second block could be excluded as side reaction since no tailing within the size exclusion chromatography traces has been observed. Thus, effects on the self-assembly behavior of the block copolymers in aqueous solutions were not

Efficient electron-induced removal of oxalate ions and formation of copper nanoparticles from copper(II) oxalate precursor layers

• Kai Rückriem,
• Sarah Grotheer,
• Henning Vieker,
• Paul Penner,
• André Beyer,
• Armin Gölzhäuser and
• Petra Swiderek

Beilstein J. Nanotechnol. 2016, 7, 852–861, doi:10.3762/bjnano.7.77

• ][12][13] and molten [5] metal salts or their aqueous solutions [6][8] as well as in polymers loaded with metal salts [14][15][16][17], metal-organic frameworks [18] and spin-coated assemblies [19]. Independent of the width and energy of the electron beam, the purity of the deposited material [18][20

Antibacterial activity of silver nanoparticles obtained by pulsed laser ablation in pure water and in chloride solution

• Brunella Perito,
• Emilia Giorgetti,
• Paolo Marsili and
• Maurizio Muniz-Miranda

Beilstein J. Nanotechnol. 2016, 7, 465–473, doi:10.3762/bjnano.7.40

• water or in aqueous solutions of LiCl using a 1064 nm ablation wavelength. Then, the obtained AgNPs were characterized and tested for antimicrobial activity against Escherichia coli and Bacillus subtilis as references for Gram-negative and Gram-positive bacteria, respectively. Results AgNP

Surface coating affects behavior of metallic nanoparticles in a biological environment

• Darija Domazet Jurašin,
• Marija Ćurlin,
• Ivona Capjak,
• Tea Crnković,
• Marija Lovrić,
• Michal Babič,
• Daniel Horák,
• Ivana Vinković Vrček and
• Srećko Gajović

Beilstein J. Nanotechnol. 2016, 7, 246–262, doi:10.3762/bjnano.7.23

• screening of the biocompatibility and colloidal stability of metallic NPs in biological environments. The obtained results have shown that the agglomeration behavior of metallic NPs in aqueous solutions with the pH and ionic strength close to biological fluids depends on the surface coating. This study

• solution was injected into the boiling aqueous solutions of AsA (just after 1 min boiling after AsA addition to boiling water). The final concentrations of reactants were 0.673 mM for sodium citrate, 0.3 mM for AgNO3 and 0.1 μM for AsA. The color of the reaction solution quickly changed from colorless to

Single-molecule mechanics of protein-labelled DNA handles

• Vivek S. Jadhav,
• Dorothea Brüggemann,
• Florian Wruck and
• Martin Hegner

Beilstein J. Nanotechnol. 2016, 7, 138–148, doi:10.3762/bjnano.7.16

• from Sigma-Aldrich (Dublin, Ireland). All aqueous solutions were prepared using nanopure water from a Millipore Milli-Q system, additionally filtered with 0.22 µm pore size filters. We used TICO buffer (20 mM HEPES-KOH, pH 7.5, 6 mM magnesium acetate, 30 mM ammonium acetate, 4 mM 2-mercaptoethanol) to

Fabrication and characterization of novel multilayered structures by stereocomplexion of poly(D-lactic acid)/poly(L-lactic acid) and self-assembly of polyelectrolytes

• Elena Dellacasa,
• Li Zhao,
• Gesheng Yang,
• Laura Pastorino and
• Gleb B. Sukhorukov

Beilstein J. Nanotechnol. 2016, 7, 81–90, doi:10.3762/bjnano.7.10

• resonance frequency of the quartz crystal oscillator, A is the area of the electrode (0.205 cm2), ρq is the quartz density (2.648 g/cm3), and µq is its shear modulus (2.947·1011 g/cm·s2). The cleaned electrodes were immersed into aqueous solutions of PSS and PAH (2 mg/mL) for 15 min and PLL (5 mg/mL) for 30

Controlled graphene oxide assembly on silver nanocube monolayers for SERS detection: dependence on nanocube packing procedure

• Martina Banchelli,
• Bruno Tiribilli,
• Roberto Pini,
• Luigi Dei,
• Paolo Matteini and
• Gabriella Caminati

Beilstein J. Nanotechnol. 2016, 7, 9–21, doi:10.3762/bjnano.7.2

• obtained by Sigma-Aldrich. Aqueous solutions were prepared using ultrapure Milli-Q water. Silicon wafers (n-type, no dopant) were purchased from Sigma-Aldrich. Synthesis of AgNCs. EG (10 mL) was placed into a flask and heated under magnetic stirring in an oil bath at 150 °C for 1 h under a nitrogen flow

pH-Triggered release from surface-modified poly(lactic-co-glycolic acid) nanoparticles

• Manuel Häuser,
• Klaus Langer and
• Monika Schönhoff

Beilstein J. Nanotechnol. 2015, 6, 2504–2512, doi:10.3762/bjnano.6.260

• ), as well as aqueous solutions of polyethylenimine (PEI) (Mw ≈ 50,000–60,000 g/mol; 50 wt %) and polyacrylic acid (PAA) (Mw ≈ 100,000 g/mol; 35 wt %) were purchased from Sigma–Aldrich (Steinheim, Germany). An aqueous solution of poly(diallyldimethylammonium chloride) (PDADMAC) (Mw ≈ 8,500 g/mol; 28 wt

Green and energy-efficient methods for the production of metallic nanoparticles

• Mitra Naghdi,
• Mehrdad Taheran,
• Satinder K. Brar,
• M. Verma,
• R. Y. Surampalli and
• J. R. Valero

Beilstein J. Nanotechnol. 2015, 6, 2354–2376, doi:10.3762/bjnano.6.243

• and it decreased with reducing C0POM [151]. Zhang et al. used K9[H4PVIVW17O62] (HPVIV) clusters as the reducer and stabilizer for production of Pd NPs from K2PdCl4 in acidic aqueous solutions. They also admitted that the starting molar ratio of precursor to POM has influence on formation of Pd NPs and

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

• ) films was carried out by successive adsorption of cadmium and sulfide ions by means of alternating immersion of the substrates into 0.1 mol/L Cd(NO3)2 and 0.01 mol/L Na2S aqueous solutions under vigorous stirring accompanied by intermediate rinsing with distilled water after each immersion. The duration

Au nanoparticle-based sensor for apomorphine detection in plasma

• Chiara Zanchi,
• Andrea Lucotti,
• Matteo Tommasini,
• Sebastiano Trusso,
• Ugo de Grazia,
• Emilio Ciusani and
• Paolo M. Ossi

Beilstein J. Nanotechnol. 2015, 6, 2224–2232, doi:10.3762/bjnano.6.228

• .6.228 Abstract Artificially roughened gold surfaces with controlled nanostructure produced by pulsed laser deposition have been investigated as sensors for apomorphine detection aiming at clinical application. The use of such gold surfaces has been optimized using aqueous solutions of apomorphine in the

• most intense Raman features of apomorphine lie [30]. Two SERS peaks, namely at 1353 cm−1 and 1515 cm−1, were selected as intense, stable and reproducible markers for APO detection in aqueous solutions. The corrected areas under each peak were evaluated by manual selection of the baseline using Omnic 8

• ratio (see Figure 2A), was chosen for the SERS measurements of APO aqueous solutions at different concentrations. To explore the dynamic range of the sensor, the Au SERS-active substrates were tested with respect to APO concentrations of 100, 10, 1 and 0.1 μg/mL. Figure 3 shows a set of representative

Conformational switching of ethano-bridged Cu,H₂-bis-porphyrin induced by aromatic amines

• Simona Bettini,
• Emanuela Maglie,
• Rosanna Pagano,
• Victor Borovkov,
• Yoshihisa Inoue,
• Ludovico Valli and
• Gabriele Giancane

Beilstein J. Nanotechnol. 2015, 6, 2154–2160, doi:10.3762/bjnano.6.221

• in aqueous solution. The high selectivity of the SPR sensing device has been verified by checking the spectral response of the active layer towards other analytes dissolved in the aqueous solutions. Keywords: aromatic amines; bis-porphyrin; conformational switching; Langmuir film; surface plasmon

• were deposited on the SPR slide, and the shift of the SPR angle induced by the injection of amine aqueous solutions at different concentrations was monitored. The effect of aniline on the plasmon resonance of the Cu,H2-Por2 film could be detected when only 1 nM of analyte was fluxed over the active

• subphase and the Cu,H2-Por2 floating film. Aqueous solutions of amines were fluxed over the LS, Cu,H2-Por2 films deposited on metal/glass substrates (Corning 7059, with a refractive index of 1.723 at 632.8 nm, gold thickness of 44 nm) by a peristaltic pump. The SPR measurements were carried out using a

Enhanced model for determining the number of graphene layers and their distribution from X-ray diffraction data

• Beti Andonovic,
• Abdulakim Ademi,
• Anita Grozdanov,
• Perica Paunović and
• Aleksandar T. Dimitrov

Beilstein J. Nanotechnol. 2015, 6, 2113–2122, doi:10.3762/bjnano.6.216

• calculated through , for each s = 1,2,…,M. Having defined the enhanced model, it is further used to analyze some graphene samples produced by electrolysis in molten salts and by electrolysis in aqueous solutions, both using reverse potential, providing considerably increased accuracy in determining graphene

Radiation losses in the microwave K_u band in magneto-electric nanocomposites

• Talwinder Kaur,
• Sachin Kumar,
• Jyoti Sharma and
• A. K. Srivastava

Beilstein J. Nanotechnol. 2015, 6, 1700–1707, doi:10.3762/bjnano.6.173

• ) and vector network analyser (VNA). Experimental Synthesis The synthesis of La–Co-substituted barium hexaferrite has been carried out through a sol–gel method [19] using metal nitrates (AR grade chemicals) without any purification. Aqueous solutions of iron and metal salts are mixed with each other in

Fulleropeptide esters as potential self-assembled antioxidants

• Mira S. Bjelaković,
• Tatjana J. Kop,
• Jelena Đorđević and
• Dragana R. Milić

Beilstein J. Nanotechnol. 2015, 6, 1065–1071, doi:10.3762/bjnano.6.107

• -assembly has been observed. Here, cryo-transmission electron microscopy [14] and SEM [15] experiments on aqueous solutions of fullerene-based amino acids and peptides confirmed their strong aggregation behavior and formation of spherical and ellipsoidal clusters. In the area of biological applications, a

Effects of swift heavy ion irradiation on structural, optical and photocatalytic properties of ZnO–CuO nanocomposites prepared by carbothermal evaporation method

• Sini Kuriakose,
• D. K. Avasthi and
• Satyabrata Mohapatra

Beilstein J. Nanotechnol. 2015, 6, 928–937, doi:10.3762/bjnano.6.96

• the pristine and irradiated samples was evaluated by monitoring the degradation of methylene blue (MB) and methyl orange (MO) dyes in water under sun light irradiation in a similar manner, as described previously in [41]. For the photocatalytic studies, aqueous solutions of 3.7 μM MB and 3.7 μM MO

In situ observation of biotite (001) surface dissolution at pH 1 and 9.5 by advanced optical microscopy

• Chiara Cappelli,
• Daniel Lamarca-Irisarri,
• Jordi Camas,
• F. Javier Huertas and
• Alexander E. S. Van Driessche

Beilstein J. Nanotechnol. 2015, 6, 665–673, doi:10.3762/bjnano.6.67

• -resolution phase shifting interferometer (PSI) that allows for the in situ measurement of extremely low surface dissolution (and growth) rates of minerals while submerged in aqueous solutions [26][27][28][29][30]. With the progress of these techniques our understanding of the mechanisms of the surface

Structural, optical, opto-thermal and thermal properties of ZnS–PVA nanofluids synthesized through a radiolytic approach

• Alireza Kharazmi,
• Nastaran Faraji,
• Roslina Mat Hussin,
• Elias Saion,
• W. Mahmood Mat Yunus and
• Kasra Behzad

Beilstein J. Nanotechnol. 2015, 6, 529–536, doi:10.3762/bjnano.6.55

• typical procedure, five different aqueous solutions of PVA (5 wt %) were prepared in a water bath for 1 h at 75 °C. Subsequently, the same amount, 10−2 molar ratio with respect to water, of Zn(CH3COO)2 and Na2S2O3 were added and the solution was stirred for 2 h. The solutions were finally irradiated with

Pulmonary surfactant augments cytotoxicity of silica nanoparticles: Studies on an in vitro air–blood barrier model

• Jennifer Y. Kasper,
• Lisa Feiden,
• Maria I. Hermanns,
• Christoph Bantz,
• Michael Maskos,
• Ronald E. Unger and
• C. James Kirkpatrick

Beilstein J. Nanotechnol. 2015, 6, 517–528, doi:10.3762/bjnano.6.54

• the Nalp3 inflammasome, thus initiating the release of pro-inflammatory cytokines [37]. Phospholipids such as DPPC are also a crucial component of lung surfactant. Other studies reported that the aSNP-silanol-phospholipid interaction or even aSNP in aqueous solutions have the potential to initiate

Tunable white light emission by variation of composition and defects of electrospun Al₂O₃–SiO₂ nanofibers

• Jinyuan Zhou,
• Gengzhi Sun,
• Hao Zhao,
• Xiaojun Pan,
• Zhenxing Zhang,
• Yujun Fu,
• Yanzhe Mao and
• Erqing Xie

Beilstein J. Nanotechnol. 2015, 6, 313–320, doi:10.3762/bjnano.6.29

• and used as received without any further purification. Al2O3–SiO2 hetero-nanofibers were prepared by electrospinning, the details of which can be reviewed from previously published work [41][42][43][44]. Briefly, sol–gel aqueous solutions were prepared by dissolving TEOS, Al(NO3)3·9H2O, and PVP powder

The effect of surface charge on nonspecific uptake and cytotoxicity of CdSe/ZnS core/shell quantum dots

• Vladimir V. Breus,
• Anna Pietuch,
• Marco Tarantola,
• Thomas Basché and
• Andreas Janshoff

Beilstein J. Nanotechnol. 2015, 6, 281–292, doi:10.3762/bjnano.6.26

• MPA-ligands, and zwitterionic DPA ligands (Scheme 1). At physiological pH 7.4, CA–QDs exhibit high aggregation rates in aqueous solutions, with hydrodynamic diameters 4–5 times larger than those of the as-prepared particles with the initial coating in organic solution [11]. In contrast, DHLA–QDs and

Kelvin probe force microscopy in liquid using electrochemical force microscopy

• Liam Collins,
• Stephen Jesse,
• Jason I. Kilpatrick,
• Alexander Tselev,
• M. Baris Okatan,
• Sergei V. Kalinin and
• Brian J. Rodriguez

Beilstein J. Nanotechnol. 2015, 6, 201–214, doi:10.3762/bjnano.6.19

• Aω for Au is weakly dependent on bias in this range, suggesting the mechanisms at play are significantly different from those described by Equation 2. In aqueous solutions, charge screening from ions, adsorption of water molecules and surface dipoles at the probe and/or sample surface could also play

• performed with Vac = 0.5 V [25 kHz] applied to the probe. EcFM spectra [bias-on] collected 500 nm above HOPG in aqueous solutions of increasing salt concentration (1 mM–1 M NaCl). Measurements were recorded from low to high concentrations using the same probe. Vertical scale ±5 a.u. (data normalized by the

SERS and DFT study of copper surfaces coated with corrosion inhibitor

• Maurizio Muniz-Miranda,
• Francesco Muniz-Miranda and
• Stefano Caporali

Beilstein J. Nanotechnol. 2014, 5, 2489–2497, doi:10.3762/bjnano.5.258

• in high amount in the environment, aqueous solutions or soil. A very efficient way to protect copper surfaces is by creating an anticorrosive thin film by chemisorption of organic inhibitors. Heterocycles containing sulphur or nitrogen atoms, available for bonding with the copper surface, are widely