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@article{faucris.107150384,
author = {Detsch, Rainer and Sarker, Bapi and Zehnder, Tobias and Frank, Gerhard and Boccaccini, Aldo R.},
doi = {10.1016/j.mattod.2015.10.013},
faupublication = {yes},
journal = {Materials Today},
pages = {590-591},
peerreviewed = {Yes},
title = {{Advanced} alginate-based hydrogels},
volume = {18},
year = {2015}
}
@article{faucris.111838144,
abstract = {Silicon nanoparticles were dispersed for 24 hours in 1-butanol using a stirred media mill. Via this process intrinsically stable suspensions (in regard to aggregation) of Si nanoparticles were produced after 6 hours of dispersing. The evolution of morphology, particle size and structure was investigated by dynamic light scattering, X-ray diffraction, Raman spectroscopy and high resolution transmission electron microscopy as a function of dispersing time. The average crystallite size decreased from about 18 nm down to about 10 nm within 24 hours of milling as determined by X-ray diffraction and Raman scattering measurements. In addition careful analysis of the Raman spectra revealed a decrease of the crystalline volume fraction from 75% down to 24% and a corresponding increase of the amorphous phase. The microstructural development with varying crystallite size and crystalline volume fraction was directly confirmed by transmission electron microscopy measurements. Elemental analysis showed an increase of oxygen content that was directly proportional to the increase in specific surface area of the silicon nanoparticles during the dispersing process. The surface chemistry of the Si nanoparticles was analyzed by diffuse reflectance infrared Fourier transform spectroscopy that indicated vibrational bands of HSi-Si 3-xO x, SiO x, and residual 1-butanol. The final product of the dispersing process seems to be a two-phase mixture of amorphous Si and Si nanocrystallites covered with SiO x on the surface. © 2007 WILEY-VCH Verlag GmbH & Co. KGaA.},
author = {Frank, Gerhard and Peukert, Wolfgang and Reindl, Armin and Altin, Ergün and Aldabergenova, Saule},
doi = {10.1002/pssa.200622557},
faupublication = {yes},
journal = {physica status solidi (a)},
keywords = {nano; particle; dispersion;},
note = {UnivIS-Import:2015-03-09:Pub.2007.tech.IW.LM.disper},
pages = {2329-2338},
peerreviewed = {Yes},
title = {{Dispersing} silicon nanoparticles in a stirred media mill - investigating the evolution of morphology, structure and oxide formation},
volume = {204},
year = {2007}
}
@inproceedings{faucris.240935186,
abstract = {Semiconducting nanoparticles were dispersed systematically in organic
solvents using a variety of methods. In the case of silicon particles
prepared by gas phase synthesis a high specific energy input is
necessary to obtain intrinsically stable suspensions. Therefore Si
nanoparticles were dispersed for 24 hours in 1-butanol using a stirred
media mill. Via this process intrinsically stable suspensions of Si
nanoparticles were produced. The evolution of morphology, particle size
and structure was investigated by dynamic light scattering, X-ray
diffraction, Raman spectroscopy, and high resolution transmission
electron microscopy as a function of dispersing time. The
microstructural development with varying crystallite size and
crystalline volume fraction was analyzed by Raman spectroscopy and
directly confirmed by transmission electron microscopy measurements. The
surface chemistry of the Si nanoparticles was analyzed by diffuse
reflectance infrared Fourier transform spectroscop},
author = {Reindl, Armin and Aldabergenova, Saule and Altin, Ergün and Frank, Gerhard and Peukert, Wolfgang},
booktitle = {4},
date = {2007-05-20/2007-05-24},
faupublication = {yes},
isbn = {1420063421},
keywords = {Raman spectroscopy; HRTEM; Stirred media mill; Silicon nanoparticles; XRD},
pages = {506-509},
peerreviewed = {unknown},
title = {{Fabrication} of nanoparticulate inks for applications in printable electronics},
url = {https://www.scopus.com/record/display.uri?eid=2-s2.0-34547984361&origin=inward},
venue = {Santa Clara, CA},
volume = {4},
year = {2007}
}
@article{faucris.120834164,
abstract = {Nanoparticles can be produced by wet grinding in stirred media mills if agglomeration is prevented by stabilization of the particles. Since the fracture mechanisms at the lower nanoscale are not yet understood, we studied the evolution of the microstructure within tin dioxide particles. Electrostatic stabilization allows the formation of tin dioxide with a mean particle size of 25 nm as measured by dynamic light scattering. High-resolution transmission electron microscopy (HRTEM) images show particles well below 10 nm and mean crystallite sizes of 9 nm were obtained from X-ray diffraction by applying the Rietveld refinement method. Additionally, TEM and HRTEM analyses were conducted to gain detailed insight into the microstructural effects governing the grinding process. Microscopy revealed surprisingly rich phenomena including the formation of shear bands, twinning and stacking faults that directly affect the grinding behavior. Interestingly the ceramic nanoparticles showed not only fracture patterns expected from brittle fracture but also many traces of plastic deformation. For comparison the uniaxial compression of particles up to 30 nm in diameter was simulated using molecular dynamics. The simulated particles shared microstructural details with the real samples, most importantly the shear bands which lead to significant plastic deformation. The internal microstructure produced during multiple particle stressing events in the mill and also observed in the simulations is directly linked to the fracture mechanism and the experimentally observed grinding limit. © 2009 Acta Materialia In},
author = {Armstrong, Patrick and Knieke, Catharina and Mackovic, Mirza and Frank, Gerhard and Hartmaier, Alexander and Göken, Mathias and Peukert, Wolfgang and Mackovic, Mirza},
doi = {10.1016/j.actamat.2009.02.049},
faupublication = {yes},
journal = {Acta Materialia},
keywords = {Molecular dynamics simulations; Nanomechanics; Nanostructure; Shear bands; Transmission electron microscopy (TEM)},
note = {UnivIS-Import:2015-03-09:Pub.2009.tech.IW.LM.micros},
pages = {3060-3071},
peerreviewed = {Yes},
title = {{Microstructural} evolution during deformation of tin dioxide nanoparticles in a comminution process},
volume = {57},
year = {2009}
}
@article{faucris.230872198,
abstract = {The aim of this study was to fabricate and characterize various concentrations of peppermint essential oil (PEP) loaded on poly(epsilon-caprolactone) (PCL) electrospun fiber mats for healing applications, where PEP was intended to impart antibacterial activity to the fibers. SEM images illustrated that the morphology of all electrospun fiber mats was smooth, uniform, and bead-free. The average fiber diameter was reduced by the addition of PEP from 1.6 +/- 0.1 to 1.0 +/- 0.2 mu m. Functional groups of the fibers were determined by Raman spectroscopy. Gas chromatography-mass spectroscopy (GC-MS) analysis demonstrated the actual PEP content in the samples. In vitro degradation was determined by measuring weight loss and their morphology change, showing that the electrospun fibers slightly degraded by the addition of PEP. The wettability of PCL and PEP loaded electrospun fiber mats was measured by determining contact angle and it was shown that wettability increased with the incorporation of PEP. The antimicrobial activity results revealed that PEP loaded PCL electrospun fiber mats exhibited inhibition against Staphylococcus aureus (gram-positive) and Escherichia coli (gram-negative) bacteria. In addition, an in-vitro cell viability assay using normal human dermal fibroblast (NHDF) cells revealed improved cell viability on PCL, PCLPEP1.5, PCLPEP3, and PCLGEL6 electrospun fiber mats compared to the control (CNT) after 48 h cell culture. Our findings showed for the first time PEP loaded PCL electrospun fiber mats with antibiotic-free antibacterial activity as promising candidates for wound healing applications.},
author = {Ünalan, Irem and Slavik, Benedikt and Büttner, Andrea and Goldmann, Wolfgang and Frank, Gerhard and Boccaccini, Aldo R.},
doi = {10.3389/fbioe.2019.00346},
faupublication = {yes},
journal = {Frontiers in Bioengineering and Biotechnology},
keywords = {wound healing; peppermint essential oil; poly (ε-caprolactone); electrospinning; antibacterial activity},
note = {CRIS-Team WoS Importer:2019-12-27},
peerreviewed = {Yes},
title = {{Physical} and {Antibacterial} {Properties} of {Peppermint} {Essential} {Oil} {Loaded} {Poly} (epsilon-caprolactone) ({PCL}) {Electrospun} {Fiber} {Mats} for {Wound} {Healing}},
volume = {7},
year = {2019}
}
@article{faucris.110955284,
abstract = {Thin (0.5--2~mm thick) pseudotachylyte veins occur within muscovite-bearing (~10% volume), amphibolite-facies quartzites of the Schneeberg Normal Fault Zone (Austroalpine, Southern Tyrol, Italy). Pseudotachylytes are associated with precursor localized plastic microshear zones (50--150~\textgreekmm thick) developed sub-parallel to the host-rock foliation and with conjugate sets oriented at a high angle to the foliation. Such microshear zones are characterized by recrystallization to ultrafine-grained (1--2~\textgreekmm grain size) mosaic aggregates of quartz showing a transition from a host-controlled to a random crystallographic preferred orientation towards the shear zone interior. Subsequent coseismic slip mainly exploited these microshear zones. Microstructural analysis provides evidence of extensive friction-induced melting of the muscovite-bearing quartzite, producing a bimodal melt composition. First, the host-rock muscovite was completely melted and subsequently crystallized, mainly as K-feldspar. Then, about 60% volume of the ultrafine-grained quartz underwent melting and crystallized as spherulitic rims (mostly consisting of quartz~$±$~Ti~$±$~Fe) around melt-corroded quartz clasts. The two melts show immiscibility structures in the major injection veins exploiting microshear zones at high angles to the quartzite foliation. In contrast, they were mechanically mixed during flow along the main fault veins.},
author = {Bestmann, Michel and Pennacchioni, Giorgio and Frank, Gerhard and Göken, Mathias and de Wall, Helga},
doi = {10.1016/j.jsg.2010.10.009},
faupublication = {yes},
journal = {Journal of Structural Geology},
note = {WW1::896},
pages = {169-186},
peerreviewed = {Yes},
title = {{Pseudotachylyte} in muscovite-bearing quartzite: {Coseismic} friction-induced melting and plastic deformation of quartz},
volume = {33},
year = {2011}
}