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Search for "ageing" in Full Text gives 33 result(s) in Beilstein Journal of Nanotechnology.
Surfactant-controlled composition and crystal structure of manganese(II) sulfide nanocrystals prepared by solvothermal synthesis
Beilstein J. Nanotechnol. 2015, 6, 2319–2329, doi:10.3762/bjnano.6.238
- ) in an octadecene solution of Mn precursor, S, and (possibly) surfactant, and finally, ageing for 1 h before cooling and isolating the resulting NCs. MnO vs MnS: The role of sulfur and surfactant As anticipated in the Introduction, it was observed that when MnOl(OH) or MnOl2 (Ol - oleate) was
- evidence that MnOxS1−x NCs formed despite that both MnO and α-MnS have a rock salt structure. We investigated a wide range of ageing times (30–180 min) and such a NC mixture was obtained in all cases, showing that interconversion of MnO and α-MnS NCs during ageing did not occur. Both of these findings are
Mechanical properties of MDCK II cells exposed to gold nanorods
Beilstein J. Nanotechnol. 2015, 6, 223–231, doi:10.3762/bjnano.6.21
- Anna Pietuch Bastian Rouven Bruckner David Schneider Marco Tarantola Christina Rosman Carsten Sonnichsen Andreas Janshoff Institute of Physical Chemistry, Tammannstr. 6, University of Goettingen, 37077 Goettingen, Germany Max Planck Institute for Biology of Ageing, Joseph-Stelzmann-Strasse 9b
Mammalian cell growth on gold nanoparticle-decorated substrates is influenced by the nanoparticle coating
Beilstein J. Nanotechnol. 2014, 5, 2479–2488, doi:10.3762/bjnano.5.257
- Planck Institute for Biology of Ageing, Joseph-Stelzmann-Straße 9b, 50931 Cologne, Germany 10.3762/bjnano.5.257 Abstract In this work, we study epithelial cell growth on substrates decorated with gold nanorods that are functionalized either with a positively charged cytotoxic surfactant or with a
Advances in NO2 sensing with individual single-walled carbon nanotube transistors
Beilstein J. Nanotechnol. 2014, 5, 2179–2191, doi:10.3762/bjnano.5.227
- previous studies are present only when the nanotube is in contact with a substrate such as SiO2. Drift and low-frequency noise Drift of a sensor may have several origins, related to the ageing of the device, changes in materials properties over time, or ultra-low frequency noise. For example, if a
Structural, optical and photocatalytic properties of flower-like ZnO nanostructures prepared by a facile wet chemical method
Beilstein J. Nanotechnol. 2013, 4, 763–770, doi:10.3762/bjnano.4.87
- ) as compared to ZnO nanoparticles. XRD, UV–vis absorption, PL, FTIR and TEM studies revealed the formation of Zn(OH)2 surface layer on ZnO nanostructures upon ageing. We demonstrate that the formation of a passivating Zn(OH)2 surface layer on the ZnO nanostructures upon ageing deteriorates their
- efficiency to photocatalytically degrade of MB. Keywords: ageing; nanoparticles; nanosheets; photocatalysis; ZnO; Introduction Water contamination due to hazardous water soluble organic dyes and chemicals poses a severe threat to the environment. The excess azo dyes in effluents from textile and dyeing
- (MB) in 60 min. ZnO nanoparticles (NP) that were synthesized by wet chemical methods can be passivated by a Zn(OH)2 layer during ageing. Hong et al. [35] have shown that the photocatalytic activity of ZnO NP is drastically reduced when the is surface modified with polysterene. In this paper, we have
Ultraviolet photodetection of flexible ZnO nanowire sheets in polydimethylsiloxane polymer
Beilstein J. Nanotechnol. 2012, 3, 353–359, doi:10.3762/bjnano.3.41
- block the UV light. Moreover, carbon-based polymers undergo oxidation with ageing, and the degradation could be expedited by the absorption of UV light. In this paper, we report results of experiments on UV photodetectors based on a thin sheet of ZnO nanowires embedded in polydimethylsiloxane (PDMS
- due to ageing. The surface Ag2O layer, a narrow bandgap semiconductor, added an extra barrier for electrons flowing between Ag nanoparticles and ZnO nanowires, resulting in the nonlinear I–V curves in Figure 3a. The I–V curve of the device in PDMS measured in the dark, plotted in the insert in Figure
Template-assisted formation of microsized nanocrystalline CeO2 tubes and their catalytic performance in the carboxylation of methanol
Beilstein J. Nanotechnol. 2011, 2, 776–784, doi:10.3762/bjnano.2.86
- and characterization of hierarchical microsized nanocrystalline ceria fibre mats Formation of ceria tubes without surfactant Ceria tubes were prepared by an exotemplating technique. After controlled ageing of a sol-precursor solution prepared from cerium ammonium nitrate (NH4)2Ce(NO3)6 in water and
Inorganic–organic hybrid materials through post-synthesis modification: Impact of the treatment with azides on the mesopore structure
Beilstein J. Nanotechnol. 2011, 2, 486–498, doi:10.3762/bjnano.2.52
- sorption analysis. Similar effects were observed for unmodified silica gels by simple ageing in azide-containing media, whether a relatively small or a sterically demanding counter ion (Na+ or (H3C)4N+) was used. The structural modification did not seem to depend greatly on whether an organic aprotic
- [18]. Each of these strategies allows for a high level of control over macropore/mesopore size distribution, surface area, etc. It is well known that ageing of silica gels in different environments or in hydrothermal conditions has a pronounced influence on the final gel structure [19][20]. Ageing at
- . Simple ageing of unmodified mesoscopically organized silica gels in azide-containing media allows us to demonstrate that the observed effects are not due to the inserted azide-functionalities, which are covalently attached to the silica surface, but rather to an exposure of a mesostructured silica matrix
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