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Search for "cellulose" in Full Text gives 106 result(s) in Beilstein Journal of Nanotechnology.

Bombyx mori silk/titania/gold hybrid materials for photocatalytic water splitting: combining renewable raw materials with clean fuels

  • Stefanie Krüger,
  • Michael Schwarze,
  • Otto Baumann,
  • Christina Günter,
  • Michael Bruns,
  • Christian Kübel,
  • Dorothée Vinga Szabó,
  • Rafael Meinusch,
  • Verónica de Zea Bermudez and
  • Andreas Taubert

Beilstein J. Nanotechnol. 2018, 9, 187–204, doi:10.3762/bjnano.9.21

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  • , Goutailler et al. deposited an anatase/brookite NP mixture on cellulose from tetrabutylammonium bromide (N(n-Bu)4Br)/titanium tetraisopropoxide (Ti(OiPr)4) solutions in hexane [32]. These NPs strongly interact via non-covalent interactions (e.g., hydrogen bonds [33][34]) with the cellulose fibers and the
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Published 17 Jan 2018

Electrical properties of a liquid crystal dispersed in an electrospun cellulose acetate network

  • Doina Manaila Maximean,
  • Octavian Danila,
  • Pedro L. Almeida and
  • Constantin Paul Ganea

Beilstein J. Nanotechnol. 2018, 9, 155–163, doi:10.3762/bjnano.9.18

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  • in a similar fashion as PDLCs (polymer-dispersed liquid crystals), produced from cellulose acetate (CA) electrospun fibers deposited onto indium tin oxide coated glass and a nematic liquid crystal (E7), were studied. CA and the CA/liquid crystal composite were characterized by multiple investigation
  • dielectric loss with the Havriliak–Negami functions. To determine the electrical characteristics of the studied samples, impedance measurements results were treated using the Cole–Cole diagram and the three-element equivalent model. Keywords: cellulose nanocomposite; dielectric spectroscopy; impedance
  • optoelectronics (light valves, polarizers), architectural windows, reduction of solar heat load [2][6], nonlinear optics [7][8][9] and nanotechnological applications [10][11][12][13][14][15][16][17][18][19][20]. The macroscopic electro-optical effect in electrospun cellulose acetate/LC composites is similar to
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Published 15 Jan 2018

Review on optofluidic microreactors for artificial photosynthesis

  • Xiaowen Huang,
  • Jianchun Wang,
  • Tenghao Li,
  • Jianmei Wang,
  • Min Xu,
  • Weixing Yu,
  • Abdel El Abed and
  • Xuming Zhang

Beilstein J. Nanotechnol. 2018, 9, 30–41, doi:10.3762/bjnano.9.5

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  • (e.g., sugar, cellulose). The global demand for food is increasing dramatically with the continuous growth of the world population [47]. An increase in population requires more land, water and energy, which in turn decreases the ability to produce food. Meanwhile, the requirement for more land results
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Published 04 Jan 2018

Synthesis and characterization of noble metal–titania core–shell nanostructures with tunable shell thickness

  • Bartosz Bartosewicz,
  • Marta Michalska-Domańska,
  • Malwina Liszewska,
  • Dariusz Zasada and
  • Bartłomiej J. Jankiewicz

Beilstein J. Nanotechnol. 2017, 8, 2083–2093, doi:10.3762/bjnano.8.208

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  • poly(sodium 4-styrenesulfonate) (PSS) [49], mercaptoundecanoic acid [38][39], 1-ethenylpyrrolidin-2-one (PVP) [33][41], or hydroxypropyl cellulose [45][46][47]. In addition, in some studies, an adhesion layer was formed on the metal NP surface in order to better control the TiO2 shell growth [48]. The
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Published 05 Oct 2017

Development of polycationic amphiphilic cyclodextrin nanoparticles for anticancer drug delivery

  • Gamze Varan,
  • Juan M. Benito,
  • Carmen Ortiz Mellet and
  • Erem Bilensoy

Beilstein J. Nanotechnol. 2017, 8, 1457–1468, doi:10.3762/bjnano.8.145

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  • -Aldrich, Germany. The chitosan used for coating the nanoparticles (Protasan UP G-113; MW: <200 kDa, viscosity: <20 mPa·s), was purchased from Novamatrix, Norway. Cellulose membrane dialysis tubing (avgerage flat width 25 mm, MWCO: 14,000 Da) was purchased from Sigma-Aldrich, Germany. All other chemicals
  • dialysis membrane (Sigma, cellulose membrane, MWCO: 100,000 Da, Sigma Chemicals). The nanoparticle-containing dialysis bags, closed with stoppers on both ends, were placed in PBS pH 7.4 containing 0.1% Tween 80 at 37 °C to provide sink conditions. The samples were taken from the medium at specific time
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Published 13 Jul 2017

Cationic PEGylated polycaprolactone nanoparticles carrying post-operation docetaxel for glioma treatment

  • Cem Varan and
  • Erem Bilensoy

Beilstein J. Nanotechnol. 2017, 8, 1446–1456, doi:10.3762/bjnano.8.144

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  • than 100 nm and a net positive surface charge to facilitate cellular internalization of drug-loaded nanoparticles. Hydroxypropyl cellulose films were prepared to incorporate these nanoparticle dispersions to complete the implantable drug delivery system. Results: The diameter of core–shell
  • particles, and the drug release rate from the nanoparticles was slowed down to 48 h by dispersing the nanoparticles in a hydroxypropyl cellulose film. Cell culture studies revealed that docetaxel-loaded nanoparticles cause higher cytotoxicity compared to the free docetaxel solution in DMSO. Conclusion
  • . Dialysis tubing cellulose membrane (average flat width 25 mm, MWCO: 14,000 Da) and all organic solvents and chemicals were purchased from Sigma-Aldrich, Germany. Ultrapure water was obtained from a Millipore Simplicity 185 ultrapure water system, France and used without further purification. Methods Pre
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Published 12 Jul 2017

Bright fluorescent silica-nanoparticle probes for high-resolution STED and confocal microscopy

  • Isabella Tavernaro,
  • Christian Cavelius,
  • Henrike Peuschel and
  • Annette Kraegeloh

Beilstein J. Nanotechnol. 2017, 8, 1283–1296, doi:10.3762/bjnano.8.130

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  • particles were purified by dialysis against water (4 L, water exchange after 30 min, 1 h, 2 h, 12 h) with dialysis membrane (Nadir, regenerated cellulose membrane, molecular weight cut-off: 10–20 kDa) from Carl Roth (Karlsruhe, Germany), followed by filtration using a sterile 0.22 µm cellulose acetate
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Published 21 Jun 2017

Preparation of thick silica coatings on carbon fibers with fine-structured silica nanotubes induced by a self-assembly process

  • Benjamin Baumgärtner,
  • Hendrik Möller,
  • Thomas Neumann and
  • Dirk Volkmer

Beilstein J. Nanotechnol. 2017, 8, 1145–1155, doi:10.3762/bjnano.8.116

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  • methanol, dried under ambient conditions and subsequently dissolved in water by neutralizing with 25 wt % aqueous ammonia solution. The clear polymer solution was transferred into dialysis tubing (Aldrich, cellulose membrane, typical molecular weight cut-off: 3500 kDa) and the dialysis was carried out
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Published 26 May 2017

Needs and challenges for assessing the environmental impacts of engineered nanomaterials (ENMs)

  • Michelle Romero-Franco,
  • Hilary A. Godwin,
  • Muhammad Bilal and
  • Yoram Cohen

Beilstein J. Nanotechnol. 2017, 8, 989–1014, doi:10.3762/bjnano.8.101

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Published 05 May 2017

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

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  • bacterial cellulose. The smallest particle size was obtained with a 71% RDX/gelatine mixture. However, increasing the content of RDX leads to an increase in the particle size and the maximum RDX loading tested was 91% resulting in a mean particle diameter of 50 nm. The sensitivity of this composite towards
  • impact and friction was reduced by two times, therefore questioning the reactivity. Nevertheless, further efforts were made to replace the bacterial cellulose with an energetic matrix. Crystallization in solution allows the formation of large crystals by growth, thus allowing more parametric studies
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Published 17 Feb 2017

Biological and biomimetic materials and surfaces

  • Stanislav Gorb and
  • Thomas Speck

Beilstein J. Nanotechnol. 2017, 8, 403–407, doi:10.3762/bjnano.8.42

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  • dispersal. Kreitschitz et al. studied these tribological properties of the seed envelope under different hydration conditions and revealed the presence of cellulose fibrils in the mucilage in a microscopy study, which are presumably responsible for the uniform distribution of the mucilaginous layer on the
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Published 08 Feb 2017

Uptake of the proteins HTRA1 and HTRA2 by cells mediated by calcium phosphate nanoparticles

  • Olga Rotan,
  • Katharina N. Severin,
  • Simon Pöpsel,
  • Alexander Peetsch,
  • Melisa Merdanovic,
  • Michael Ehrmann and
  • Matthias Epple

Beilstein J. Nanotechnol. 2017, 8, 381–393, doi:10.3762/bjnano.8.40

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  • polyethyleneimine (PEI; cationic nanoparticles) or carboxymethyl cellulose (CMC; anionic nanoparticles) and loaded with defined amounts of the fluorescently labelled proteins HTRA1, HTRA2, and BSA. The nanoparticles were purified by ultracentrifugation and characterized by dynamic light scattering and scanning
  • solutions was adjusted beforehand with aqueous NaOH (0.1 M; Merck, p.a.) to pH 9. A few seconds after mixing, 1 mL of the calcium phosphate nanoparticle dispersion was taken with a syringe and mixed with 0.05 mL of either aqueous carboxymethyl cellulose solution (CMC; Sigma-Aldrich, Mw = 90 kDa, degree of
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Published 07 Feb 2017

Photocatalysis applications of some hybrid polymeric composites incorporating TiO2 nanoparticles and their combinations with SiO2/Fe2O3

  • Andreea Laura Chibac,
  • Tinca Buruiana,
  • Violeta Melinte and
  • Emil C. Buruiana

Beilstein J. Nanotechnol. 2017, 8, 272–286, doi:10.3762/bjnano.8.30

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  • polymethylmethacrylate, polyurethanes, polyvinylidene fluoride, polyethersulfone, cellulose acetate, and polyvinyl alcohol [42][43], together with their testing in water treatment were reported in literature. The aim of this study was to develop new hybrid polymeric materials with four types of titania nanoparticles
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Published 27 Jan 2017

Streptavidin-coated gold nanoparticles: critical role of oligonucleotides on stability and fractal aggregation

  • Roberta D'Agata,
  • Pasquale Palladino and
  • Giuseppe Spoto

Beilstein J. Nanotechnol. 2017, 8, 1–11, doi:10.3762/bjnano.8.1

Graphical Abstract
  • genomic DNA [13], were purchased from Thermo Fisher Scientific, Inc. Streptavidin from Streptomyces avidinii, provided in lyophilized form in 10 mM PBS, pH 7.4, was purchased from Invitrogen (Italy). Mixed cellulose ester membrane filters were purchased from Whatman (UK). Phosphate buffered saline (PBS
  • reduction was obtained after 10 min. The solution was cooled to the room temperature and filtered through a 0.45 μm mixed cellulose ester membrane filter. To prevent light-induced flocculation of the colloids, all colloidal gold solutions were stored in the dark and refrigerated at 4 °C. Similar conditions
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Published 02 Jan 2017

“Sticky invasion” – the physical properties of Plantago lanceolata L. seed mucilage

  • Agnieszka Kreitschitz,
  • Alexander Kovalev and
  • Stanislav N. Gorb

Beilstein J. Nanotechnol. 2016, 7, 1918–1927, doi:10.3762/bjnano.7.183

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  • envelope that also influence the dispersal of seeds. To determine the physical properties of Plantago lanceolata seed mucilage we studied (1) composition, (2) desiccation, (3) adhesion, and (4) friction properties of the mucilage under different hydration conditions. We revealed the presence of cellulose
  • water loss from the cellulose mucilage was more rapid. The obtained different values can result from the presence of cellulose fibrils and their interaction with pectins in the mucilage. Because of this feature the mucilage of P. lanceolata may represent a more regularly ordered and stabile system than
  • the pectic mucilage of flax, which lacks cellulose. In spite of the fact that P. lanceolata mucilage revealed different adhesive and frictional properties than the pectic mucilage, it still demonstrates an effective system promoting zoochoric seed dispersal. Cellulose may additionally prevent the
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Published 05 Dec 2016

Functionalized platinum nanoparticles with surface charge trigged by pH: synthesis, characterization and stability studies

  • Giovanna Testa,
  • Laura Fontana,
  • Iole Venditti and
  • Ilaria Fratoddi

Beilstein J. Nanotechnol. 2016, 7, 1822–1828, doi:10.3762/bjnano.7.175

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  • reducing agents such as nanocrystalline cellulose from cotton or bacterial cellulose matrixes are currently being studied [23][24]. Thiol ligands have been thoroughly investigated [25][26][27] and particular attention has been devoted to hydrophilic ligands that confer to the PtNP stability in water
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Published 24 Nov 2016

The effect of dry shear aligning of nanotube thin films on the photovoltaic performance of carbon nanotube–silicon solar cells

  • Benedikt W. Stolz,
  • Daniel D. Tune and
  • Benjamin S. Flavel

Beilstein J. Nanotechnol. 2016, 7, 1486–1491, doi:10.3762/bjnano.7.141

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  • supernatant by vacuum filtration onto mixed cellulose ester (MCE) membranes (0.45 μm, HAWP, Merck Millipore) and rinsed thoroughly with copious DI water as per Wu et al. [46] and Hu et al. [47]. For the DSA preparation, a cylindrical Teflon stir bar (8 × 30 mm) was used as the aligner. The membranes were
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Published 20 Oct 2016

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

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  • filtered (0.22 µm, cellulose acetate filter unit) directly before use. Additionally, 500 mg of PLGA were dissolved in 5 mL ethyl acetate. Polyelectrolyte solutions were diluted to concentrations of 10 mmol/L (PAA and PDADMAC) and 20 mmol/L (PEI), respectively. All polyelectrolyte concentrations were
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Published 30 Dec 2015

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

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  • reaction medium [104]. Renewable feedstock: Increasing the share of renewable sources either for raw material and energy are very important. The largest renewable source for energy is biomass [129]. There are also many examples for using renewable material in synthesis of NPs including cellulose, chitin
  • cellulose hydrogels to synthesize and stabilize Ag, Au, and Pt NPs through hydrothermal process. They found that by increasing AgNO3 concentration, the particles size increases gradually from 8 to 11.4 nm at 80 °C and 24 h. Also, reaction time and temperature had direct influence on particle size. The
  • average sizes of Ag, Au and Pt NPs, calculated by Scherrer equation, were 12.3, 6.5, and 4.4 nm respectively. The particle sizes, obtained by TEM analysis, were in good agreement with Scherrer equation [37]. Chen et al. employed carboxymethyl cellulose sodium (CMS) both as reducing and stabilizing agent
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Published 10 Dec 2015

Synthesis, characterization and in vitro biocompatibility study of Au/TMC/Fe3O4 nanocomposites as a promising, nontoxic system for biomedical applications

  • Hanieh Shirazi,
  • Maryam Daneshpour,
  • Soheila Kashanian and
  • Kobra Omidfar

Beilstein J. Nanotechnol. 2015, 6, 1677–1689, doi:10.3762/bjnano.6.170

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  • fiber-like polymer is made of ß(1→4)-linked N-acetyl-D-glucosamine and derives from chitin. After cellulose, chitosan is known as the second most abundant organic compound in nature. A major disadvantage of using chitosan is its poor solubility at physiological pH, whereas it is soluble and active only
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Published 03 Aug 2015

From lithium to sodium: cell chemistry of room temperature sodium–air and sodium–sulfur batteries

  • Philipp Adelhelm,
  • Pascal Hartmann,
  • Conrad L. Bender,
  • Martin Busche,
  • Christine Eufinger and
  • Juergen Janek

Beilstein J. Nanotechnol. 2015, 6, 1016–1055, doi:10.3762/bjnano.6.105

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Published 23 Apr 2015

Novel ZnO:Ag nanocomposites induce significant oxidative stress in human fibroblast malignant melanoma (Ht144) cells

  • Syeda Arooj,
  • Samina Nazir,
  • Akhtar Nadhman,
  • Nafees Ahmad,
  • Bakhtiar Muhammad,
  • Ishaq Ahmad,
  • Kehkashan Mazhar and
  • Rashda Abbasi

Beilstein J. Nanotechnol. 2015, 6, 570–582, doi:10.3762/bjnano.6.59

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  • addition to achieve pH 8.0. The resulting precipitates were heated at 80 °C for 2 h, and filtrated through a cellulose membrane. The resulting material was thoroughly washed, dried, ground into fine powder and sieved. The nanocomposites were heated in a tube furnace under an argon (Ar) atmosphere (flow
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Published 26 Feb 2015

Exploiting the hierarchical morphology of single-walled and multi-walled carbon nanotube films for highly hydrophobic coatings

  • Francesco De Nicola,
  • Paola Castrucci,
  • Manuela Scarselli,
  • Francesca Nanni,
  • Ilaria Cacciotti and
  • Maurizio De Crescenzi

Beilstein J. Nanotechnol. 2015, 6, 353–360, doi:10.3762/bjnano.6.34

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  • ice-bath for an hour and the unbundled supernatant was collected through a pipette. The result was a well-dispersed suspension that is stable for several months. Carbon nanotube films were fabricated by a vacuum filtration process of 1 mL in volume of the dispersion cast on mixed cellulose ester
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Published 02 Feb 2015

Biopolymer colloids for controlling and templating inorganic synthesis

  • Laura C. Preiss,
  • Katharina Landfester and
  • Rafael Muñoz-Espí

Beilstein J. Nanotechnol. 2014, 5, 2129–2138, doi:10.3762/bjnano.5.222

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  • find starch [13][14], different cellulose derivatives [15], dextran [16], pectin [17], alginate [18], and poly(amino acids) or proteins [19][20][21][22][23][24][25][26][27][28][29]. Researchers in the biomineralization field very often extract proteins from biological matter and use them for the ex
  • example of a heterogeneous catalyst was reported by Taubert’s group with gold/cellulose nanocrystal hybrids produced in the presence of ionic liquids [88]. Also for catalytic applications, nanoparticles of silver, gold, and platinum were synthesized by using a cellulose aerogel [89]. Cellulose has been
  • further used for silicates. Zhang et al. [90] presented the in situ formation of silica in a cellulose aerogel (Figure 8). The addition of the silicate precursor (TEOS) takes place first, followed by a sol–gel process and the cellulose/silica composite formation. The aerogel is formed by drying with
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Published 17 Nov 2014

Ionic liquid-assisted formation of cellulose/calcium phosphate hybrid materials

  • Ahmed Salama,
  • Mike Neumann,
  • Christina Günter and
  • Andreas Taubert

Beilstein J. Nanotechnol. 2014, 5, 1553–1568, doi:10.3762/bjnano.5.167

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  • Ahmed Salama Mike Neumann Christina Gunter Andreas Taubert Institute of Chemistry, University of Potsdam, D-14476 Potsdam, Germany Cellulose and Paper Department, National Research Center, El-Tahrir Street, Dokki, Cairo, Egypt Institute of Earth and Environmental Sciences, University of Potsdam, D
  • -14476 Potsdam, Germany 10.3762/bjnano.5.167 Abstract Cellulose/calcium phosphate hybrid materials were synthesized via an ionic liquid-assisted route. Scanning electron microscopy, transmission electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, infrared spectroscopy, and
  • thermogravimetric analysis/differential thermal analysis show that, depending on the reaction conditions, cellulose/hydroxyapatite, cellulose/chlorapatite, or cellulose/monetite composites form. Preliminary studies with MC3T3-E1 pre-osteoblasts show that the cells proliferate on the hybrid materials suggesting that
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Published 16 Sep 2014
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