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Search for "aqueous solutions" in Full Text gives 202 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.

Understanding nanoparticle flow with a new in vitro experimental and computational approach using hydrogel channels

  • Armel Boutchuen,
  • Dell Zimmerman,
  • Abdollah Arabshahi,
  • John Melnyczuk and
  • Soubantika Palchoudhury

Beilstein J. Nanotechnol. 2020, 11, 296–309, doi:10.3762/bjnano.11.22

Graphical Abstract
  • , the EGDMA cross-linker was added at an amount of 3 mol % HEMA to six different aqueous solutions of HEMA (38.4 mmol, 5 g) prepared using different quantities of DI water (1–1.5 mL). The HEMA/EGDMA solutions were first mixed well via sonication (Branson 1800, Fisher) at room temperature for one hour
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Published 06 Feb 2020

High-performance asymmetric supercapacitor made of NiMoO4 nanorods@Co3O4 on a cellulose-based carbon aerogel

  • Meixia Wang,
  • Jing Zhang,
  • Xibin Yi,
  • Benxue Liu,
  • Xinfu Zhao and
  • Xiaochan Liu

Beilstein J. Nanotechnol. 2020, 11, 240–251, doi:10.3762/bjnano.11.18

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  • without further processing. In all experiments deionized water was used. Synthesis of MC based CA CA was produced from MC as follows. MC was immersed in 7% NaOH/12% urea aqueous solutions precooled at −12 °C, in which the MC content was 5.0 wt %. Subsequently, the resulting mixture was kept under vigorous
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Published 21 Jan 2020

Phase inversion-based nanoemulsions of medium chain triglyceride as potential drug delivery system for parenteral applications

  • Eike Folker Busmann,
  • Dailén García Martínez,
  • Henrike Lucas and
  • Karsten Mäder

Beilstein J. Nanotechnol. 2020, 11, 213–224, doi:10.3762/bjnano.11.16

Graphical Abstract
  • compared to the nonisotonic nanoemulsions produced in aqueous solutions of 1.75 wt % and 5 wt % NaCl concentration, as shown in Figure 4. Nanoemulsions with particles of 16–175 nm in diameter were formed with narrow PDI distributions of 0.02–0.25, as illustrated in Figure 4a and Figure 4b. All
  • to Ph. Eur. 2.2.35) was fitted linearly, and the experimentally determined osmolality of the aqueous solutions of Kolliphor HS 15 with different concentration were fitted with a polynomial function of 4th degree using the program Origin 2018G both with the intersection of the y-axis fixed at 0
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Published 17 Jan 2020

The different ways to chitosan/hyaluronic acid nanoparticles: templated vs direct complexation. Influence of particle preparation on morphology, cell uptake and silencing efficiency

  • Arianna Gennari,
  • Julio M. Rios de la Rosa,
  • Erwin Hohn,
  • Maria Pelliccia,
  • Enrique Lallana,
  • Roberto Donno,
  • Annalisa Tirella and
  • Nicola Tirelli

Beilstein J. Nanotechnol. 2019, 10, 2594–2608, doi:10.3762/bjnano.10.250

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  • the nanoparticles and on their in vitro performance as carriers. Although both processes are characterized by a simple add–mix procedure of aqueous solutions, the absence of purification (dialysis) steps in the direct complexation method is particularly appealing. Besides the shorter time of
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Published 30 Dec 2019

Design of a nanostructured mucoadhesive system containing curcumin for buccal application: from physicochemical to biological aspects

  • Sabrina Barbosa de Souza Ferreira,
  • Gustavo Braga,
  • Évelin Lemos Oliveira,
  • Jéssica Bassi da Silva,
  • Hélen Cássia Rosseto,
  • Lidiane Vizioli de Castro Hoshino,
  • Mauro Luciano Baesso,
  • Wilker Caetano,
  • Craig Murdoch,
  • Helen Elizabeth Colley and
  • Marcos Luciano Bruschi

Beilstein J. Nanotechnol. 2019, 10, 2304–2328, doi:10.3762/bjnano.10.222

Graphical Abstract
  • formation of phenylate anions and high production of CUR radicals, since this polyphenol has demonstrated high lipophilicity (log P 3.29) and low solubility in aqueous solutions and under alkaline conditions (pH > 7) [30][31][42]. These physicochemical characteristics hinder the bioavailability and
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Published 25 Nov 2019

Use of data processing for rapid detection of the prostate-specific antigen biomarker using immunomagnetic sandwich-type sensors

  • Camila A. Proença,
  • Tayane A. Freitas,
  • Thaísa A. Baldo,
  • Elsa M. Materón,
  • Flávio M. Shimizu,
  • Gabriella R. Ferreira,
  • Frederico L. F. Soares,
  • Ronaldo C. Faria and
  • Osvaldo N. Oliveira Jr.

Beilstein J. Nanotechnol. 2019, 10, 2171–2181, doi:10.3762/bjnano.10.210

Graphical Abstract
  • chloride hexahydrate (FeCl3·6H2O) with ≥98% purity was purchased from Sigma-Aldrich. Hydrochloric acid (HCl, 36.5–38.0% w/w) and NaCl with 99% purity were acquired from Labsynth (São Paulo, Brazil). Sodium citrate (Na3C6H5O7) with 99.8% purity was purchased from J.T Baker Chemical Company. All aqueous
  • solutions were prepared with ultrapure water (18 MΩ·cm at 25 °C) obtained from a Milli-Q Direct-0.3 (Millipore) purification system. Fabrication of sandwich-type electrochemical immunosensors The multi-channel screen-printed array of electrodes was fabricated according to the procedures established by Faria
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Published 06 Nov 2019

Incorporation of doxorubicin in different polymer nanoparticles and their anticancer activity

  • Sebastian Pieper,
  • Hannah Onafuye,
  • Dennis Mulac,
  • Jindrich Cinatl Jr.,
  • Mark N. Wass,
  • Martin Michaelis and
  • Klaus Langer

Beilstein J. Nanotechnol. 2019, 10, 2062–2072, doi:10.3762/bjnano.10.201

Graphical Abstract
  • , respectively) (Figure 4). Different amounts of doxorubicin did not change the loading efficiency at pH 7. Using aqueous solutions instead of methanol, we increased the doxorubicin amount during preparation to 5 mg and 7.5 mg per 50 mg PLGA. While 5 mg resulted in an increase of the drug load to 52.5 ± 0.4 µg
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Published 29 Oct 2019

Porous silver-coated pNIPAM-co-AAc hydrogel nanocapsules

  • William W. Bryan,
  • Riddhiman Medhi,
  • Maria D. Marquez,
  • Supparesk Rittikulsittichai,
  • Michael Tran and
  • T. Randall Lee

Beilstein J. Nanotechnol. 2019, 10, 1973–1982, doi:10.3762/bjnano.10.194

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  • by the lower critical solution temperature (LCST); that is, the temperature at which the hydrogel polymers become hydrophilic and soluble in aqueous solutions, or conversely, hydrophobic and insoluble in aqueous solutions [57][58][59]. Interestingly, through chemical modification, the LCST can be
  • was equilibrated to the desired temperature, optical measurements of the particles were acquired. FTIR spectral data was obtained using a Nicolet Nexus FTIR 670 spectrometer. Aqueous solutions of the hydrogel particles and pDADMAC were directly deposited onto a silicon wafer and dried under vacuum
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Published 04 Oct 2019

Layered double hydroxide/sepiolite hybrid nanoarchitectures for the controlled release of herbicides

  • Ediana Paula Rebitski,
  • Margarita Darder and
  • Pilar Aranda

Beilstein J. Nanotechnol. 2019, 10, 1679–1690, doi:10.3762/bjnano.10.163

Graphical Abstract
  • Pangel® S9, a commercial product of rheological grade that contains more than 95% pure sepiolite. Zein (Z) from maize, and alginate (A) were purchased from Sigma-Aldrich. Absolute ethanol was supplied by Panreac. Aqueous solutions were prepared from chemicals of analytical reagent grade: AlCl3·6H2O (>99
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Published 09 Aug 2019

Materials nanoarchitectonics at two-dimensional liquid interfaces

  • Katsuhiko Ariga,
  • Michio Matsumoto,
  • Taizo Mori and
  • Lok Kumar Shrestha

Beilstein J. Nanotechnol. 2019, 10, 1559–1587, doi:10.3762/bjnano.10.153

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Published 30 Jul 2019

A silver-nanoparticle/cellulose-nanofiber composite as a highly effective substrate for surface-enhanced Raman spectroscopy

  • Yongxin Lu,
  • Yan Luo,
  • Zehao Lin and
  • Jianguo Huang

Beilstein J. Nanotechnol. 2019, 10, 1270–1279, doi:10.3762/bjnano.10.126

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  • sheets were used as SERS substrates, and aqueous solutions of R6G with different concentrations (from 1 × 10−6 M to 1 × 10−18 M) were used as the test samples. 10 μL R6G solution with the given concentration was dripped onto the Ag-NP/cellulose-NF substrate using a pipette; after the solvent was
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Published 24 Jun 2019

Imaging the surface potential at the steps on the rutile TiO2(110) surface by Kelvin probe force microscopy

  • Masato Miyazaki,
  • Huan Fei Wen,
  • Quanzhen Zhang,
  • Yuuki Adachi,
  • Jan Brndiar,
  • Ivan Štich,
  • Yan Jun Li and
  • Yasuhiro Sugawara

Beilstein J. Nanotechnol. 2019, 10, 1228–1236, doi:10.3762/bjnano.10.122

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  • preparation. The steps showed a higher photodegradation activity than the steps for aqueous solutions of methylene blue [23], indicating that the different step structures have different catalytic activities. KPFM measures the contact potential difference (CPD), corresponding to the difference in work
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Published 13 Jun 2019

A highly efficient porous rod-like Ce-doped ZnO photocatalyst for the degradation of dye contaminants in water

  • Binjing Hu,
  • Qiang Sun,
  • Chengyi Zuo,
  • Yunxin Pei,
  • Siwei Yang,
  • Hui Zheng and
  • Fangming Liu

Beilstein J. Nanotechnol. 2019, 10, 1157–1165, doi:10.3762/bjnano.10.115

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  • aqueous solutions of ZnO and CZO-4 (8 ppm) were used to measure the specific chemical compositions. Conclusion In this study, we synthesized spherical ZnO and a series of rod-like Ce/ZnO catalysts via high temperature pyrolysis to investigate their photocatalytic performance using RhB as a model pollutant
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Published 03 Jun 2019

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

Graphical Abstract
  • in aqueous solutions. In order to fill this void, in this study, the effect of monomers and micelles of (a) monomeric dodecyltrimethylammonium bromide (DTAB), and (b) its corresponding gemini, bis(N,N-dimethyl-N-dodecyl)ethylene-1,2-diammonium dibromide (12-2-12) quaternary ammonium surfactant
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Published 13 May 2019

Effects of gold and PCL- or PLLA-coated silica nanoparticles on brain endothelial cells and the blood–brain barrier

  • Aniela Bittner,
  • Angélique D. Ducray,
  • Hans Rudolf Widmer,
  • Michael H. Stoffel and
  • Meike Mevissen

Beilstein J. Nanotechnol. 2019, 10, 941–954, doi:10.3762/bjnano.10.95

Graphical Abstract
  • the chromophore indocyanine green (ICG). The latter enables the transduction of laser light into heat leading to denaturation of the albumin and, subsequently, tissue fusion [6]. As ICG is unstable in aqueous solutions and prone to fast photo-bleaching, the use of a stabilizing system, such as
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Published 25 Apr 2019

Commercial polycarbonate track-etched membranes as substrates for low-cost optical sensors

  • Paula Martínez-Pérez and
  • Jaime García-Rupérez

Beilstein J. Nanotechnol. 2019, 10, 677–683, doi:10.3762/bjnano.10.67

Graphical Abstract
  • occur during the sensing event. Second, most solutions contain water and it is well known that its absorption coefficient in the NIR region is high [12]. If we place these aqueous solutions on the PCTE membrane in order to detect the presence of any component in it, part of the incident light will be
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Published 07 Mar 2019

Removal of toxic heavy metals from river water samples using a porous silica surface modified with a new β-ketoenolic host

  • Said Tighadouini,
  • Smaail Radi,
  • Abderrahman Elidrissi,
  • Khadija Haboubi,
  • Maryse Bacquet,
  • Stéphanie Degoutin,
  • Mustapha Zaghrioui and
  • Yann Garcia

Beilstein J. Nanotechnol. 2019, 10, 262–273, doi:10.3762/bjnano.10.25

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  • thermodynamical properties including pH, adsorption isotherms, competitive adsorption, selectivity and regeneration were studied to investigate the effect of ketoenol–pyridine–furan–silica (SiNL) on the removal of Zn(II), Pb(II), Cd(II) and Cu(II) from aqueous solutions. An increase in adsorption as a function of
  • from polluted media have been thus proposed. These include several well-known analytical chemistry methods [6][7][8][9][10][11][12][13][14][15][16] as well as adsorption materials able to extract metal ions from aqueous solutions [17][18][19][20][21][22][23]. However, this latter solution presents
  • , zinc and copper metal ions from aqueous solutions as well as in natural water samples. Experimental Synthesis Solvents and chemicals, used without further purification, were of analytical grade (Aldrich, 99.5% purity). Silica gel (particle size of 70–230 mesh, median pore diameter of 60 Å) (E. Merck
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Published 23 Jan 2019

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

Graphical Abstract
  • were prepared in aqueous solutions by the reaction of a mixture of mercaptoacetate (MA) complexes of Cu(II), Sn(II), and Zn(II) with sodium sulfide and a subsequent optional heat treatment at about 95 °C. An XPS study reported in [21] showed all the elements of CZTS to be present in the expected
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Published 17 Jan 2019

Uniform Sb2S3 optical coatings by chemical spray method

  • Jako S. Eensalu,
  • Atanas Katerski,
  • Erki Kärber,
  • Ilona Oja Acik,
  • Arvo Mere and
  • Malle Krunks

Beilstein J. Nanotechnol. 2019, 10, 198–210, doi:10.3762/bjnano.10.18

Graphical Abstract
  • -deposited Sb2S3 by pneumatically spraying aqueous solutions (tartaric acid added as complexing agent to prevent hydrolysis [10], akin to studies by Rajpure et al. [11]) or methanolic solutions of SbCl3. Following, we studied the effect of the Sb/S precursor molar ratio in solution on ultrasonically sprayed
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Published 15 Jan 2019

New micro/mesoporous nanocomposite material from low-cost sources for the efficient removal of aromatic and pathogenic pollutants from water

  • Emmanuel I. Unuabonah,
  • Robert Nöske,
  • Jens Weber,
  • Christina Günter and
  • Andreas Taubert

Beilstein J. Nanotechnol. 2019, 10, 119–131, doi:10.3762/bjnano.10.11

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  • interesting both from stability and surface area aspects. Pollutant removal from aqueous solutions Removal of 4-nitrophenol We have previously reported that a first-generation HYCA material prepared via a low-temperature calcination process in air very efficiently adsorbs cationic pollutants such as Pb2+, Cd2
  • when aqueous solutions with 4-nitrophenol concentrations of 1 mg/L were used. Moreover, a 50% breakthrough was reached at ≈900 min after treating 9 L of the same solution, and the 2Z-HYCA@650 °C was 100% spent after 28 h 40 min. This result demonstrates that 2Z-HYCA is a highly effective adsorbent for
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Published 09 Jan 2019

The nanoscaled metal-organic framework ICR-2 as a carrier of porphyrins for photodynamic therapy

  • Jan Hynek,
  • Sebastian Jurík,
  • Martina Koncošová,
  • Jaroslav Zelenka,
  • Ivana Křížová,
  • Tomáš Ruml,
  • Kaplan Kirakci,
  • Ivo Jakubec,
  • František Kovanda,
  • Kamil Lang and
  • Jan Demel

Beilstein J. Nanotechnol. 2018, 9, 2960–2967, doi:10.3762/bjnano.9.275

Graphical Abstract
  • Inorganic Chemistry Rez) constructed from Fe3+ and phenylene-1,4-bis(methylphosphinic acid) (PBPA) linkers [25]. ICR-2 in the microcrystalline form is stable in aqueous solutions even at high temperatures and partly retains its structure and porosity even after treatment with phosphate buffer saline (PBS
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Published 30 Nov 2018

Comparative biological effects of spherical noble metal nanoparticles (Rh, Pd, Ag, Pt, Au) with 4–8 nm diameter

  • Alexander Rostek,
  • Marina Breisch,
  • Kevin Pappert,
  • Kateryna Loza,
  • Marc Heggen,
  • Manfred Köller,
  • Christina Sengstock and
  • Matthias Epple

Beilstein J. Nanotechnol. 2018, 9, 2763–2774, doi:10.3762/bjnano.9.258

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  • = 40,000 g mol−1), sodium borohydride (Sigma-Aldrich, ≥96%, p.a.) trisodium citrate (Acros, anhydrous 98%), tannic acid (Fluka, p.a.), and D-glucose (Baker, p.a.) were all used as obtained. Aqueous solutions of H2PtCl6 or HAuCl4 (prepared by dissolution of platinum or gold in aqua regia), RhCl3, NaPdCl4
  • -octadecene, OAm) [68], or in aqueous solutions. Depending on the additives and the reaction conditions, a variety of different shapes and sizes can be realized [66][67][69][70][71][72][73][74]. The generation of small silver nanoparticles (3–6 nm) is often performed only to generate seeds as a precursor for
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Published 29 Oct 2018

Size-selected Fe3O4–Au hybrid nanoparticles for improved magnetism-based theranostics

  • Maria V. Efremova,
  • Yulia A. Nalench,
  • Eirini Myrovali,
  • Anastasiia S. Garanina,
  • Ivan S. Grebennikov,
  • Polina K. Gifer,
  • Maxim A. Abakumov,
  • Marina Spasova,
  • Makis Angelakeris,
  • Alexander G. Savchenko,
  • Michael Farle,
  • Natalia L. Klyachko,
  • Alexander G. Majouga and
  • Ulf Wiedwald

Beilstein J. Nanotechnol. 2018, 9, 2684–2699, doi:10.3762/bjnano.9.251

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  • acquisition. Figure 6A depicts a set of two hyperthermia sequences, composed of a heating (magnetic field is switched on) and a cooling stage (magnetic field is switched off), for two aqueous solutions, respectively. It is apparent that there is a critical magnetite size that renders such structures suitable
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Published 16 Oct 2018

Enhancement of X-ray emission from nanocolloidal gold suspensions under double-pulse excitation

  • Wei-Hung Hsu,
  • Frances Camille P. Masim,
  • Armandas Balčytis,
  • Hsin-Hui Huang,
  • Tetsu Yonezawa,
  • Aleksandr A. Kuchmizhak,
  • Saulius Juodkazis and
  • Koji Hatanaka

Beilstein J. Nanotechnol. 2018, 9, 2609–2617, doi:10.3762/bjnano.9.242

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  • laser and plasmonic nanoparticles will contribute to a broad field of applications ranging from pulsed X-ray generation to energetic particle sources [14] or terahertz wave emission from aqueous solutions [16]. In recent experimental studies, intense fs-laser excitation of plasmonic gold nanoparticles
  • solution surface for different Δt up to 15 ns [28]. Analyses of the relation between the time-dependent X-ray generation and the optimum laser irradiation position are still missing for other aqueous solutions, especially for experiments under ambient pressure. Previous studies, mostly with solid targets
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Published 01 Oct 2018

Non-agglomerated silicon–organic nanoparticles and their nanocomplexes with oligonucleotides: synthesis and properties

  • Asya S. Levina,
  • Marina N. Repkova,
  • Nadezhda V. Shikina,
  • Zinfer R. Ismagilov,
  • Svetlana A. Yashnik,
  • Dmitrii V. Semenov,
  • Yulia I. Savinovskaya,
  • Natalia A. Mazurkova,
  • Inna A. Pyshnaya and
  • Valentina F. Zarytova

Beilstein J. Nanotechnol. 2018, 9, 2516–2525, doi:10.3762/bjnano.9.234

Graphical Abstract
  • conjugated with oligodeoxyribonucleotides (ODN) through the binding to the negatively charged internucleotide phosphate groups to form Si–NH2·ODN complexes. Like Si–NH2, the Si–NH2·ODN nanocomplexes are dissolved in aqueous solutions. The addition of NaCl did not lead to precipitation. Si–NH2 and Si–NH2·ODN
  • Si–NH2·ODN nanocomplexes were characterized by physico-chemical methods. The proposed nanocomplexes appeared to form very small nanoparticles (which are dissolved in aqueous solutions), then penetrate into the cellular cytoplasm to deliver oligonucleotides to the nucleus. The main advantage of the
  • proposed Si–NH2 nanoparticles and Si–NH2·ODN nanocomplexes is that they are not prone to aggregation and form true aqueous solutions. The Si–NH2·ODN nanocomplexes exhibit biological activity, which has been shown with an example of the inhibition of influenza A virus replication. The proposed nanocomplexes
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Published 21 Sep 2018
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