Concept

Polytetrafluoroethylene

Related publications (57)

Estimation of Organic and Elemental Carbon using FT-IR absorbance spectra from PTFE Filters

Satoshi Takahama, Giulia Ruggeri, Matteo Reggente

Organic carbon (OC) and elemental carbon (EC) are major components of atmospheric PM. Typically OC and EC concentrations are measured using thermal optical methods from samples collected on quartz filters. However, these measurements are destructive and re ...

2015

Avoiding compositional drift during the RAFT copolymerization of N-(2-hydroxypropyl)methacrylamide and N-acryloxysuccinimide: towards uniform platforms for post-polymerization modification

Harm-Anton Klok, John Moraes, Hedi Ketari, Ioana-Maria Simionca

Controlled radical polymerization techniques such as RAFT allow fine control over polymer molecular weight and architecture. These techniques, however, do not eliminate compositional drifts in copolymerizations, which are the consequence of differences in ...

Royal Society of Chemistry2015

Illuminating the chemo-mechanics of hydrogen enhanced fatigue crack growth in aluminum alloys

Derek Warner, Kristopher Learion Baker

The presence of elemental hydrogen is known to accelerate fatigue crack growth in aluminum alloys. However, a direct link between experimental data and the governing atomistic mechanisms has remained elusive. Here we present a series of computational studi ...

Pergamon-Elsevier Science Ltd2015

On the micrometre precise mould filling of liquid polymer derived ceramic precursor for 300-µm-thick high aspect ratio ceramic MEMS

Jürgen Brugger, Rosario Maurizio Gullo, Jonas Grossenbacher

This paper describes a novel and scalable method for the fabrication of polymer derived ceramics (PDC) structures with high aspect ratio and micrometre scale features. Elastomeric micro-moulds composed of a filling pot are used to deliver via sacrificial m ...

Elsevier2015

Highly stretchable dielectric elastomer composites containing high volume fractions of silver nanoparticles

Heinrich Hofmann, Jose Enrico Quijano Quinsaat

The dielectric permittivity (epsilon') of a polymeric material can be significantly increased when blended with conductive fillers at concentrations approaching the percolation threshold. However, reproducible synthesis of such composites is after decades ...

Royal Society of Chemistry2015

Multilevel Micro-Structuring of Glassy Carbon for Precision Glass Molding of Diffractive Optical Elements

Hans Peter Herzig, Toralf Scharf, Karin Prater

A consumer market for diffractive optical elements in glass can only be created if high efficient elements are available at affordable prices. In diffractive optics the efficiency and optical properties increases with the number of levels used, but in the ...

Spie-Int Soc Optical Engineering2015

Exploiting Dispersion-driven Aggregators as a Route to New One-dimensional Organic Nanowires

Riccardo Petraglia, Adrien Georges Nicolai, Hongguang Liu

The efficiency of charge carrier mobility in organic semiconductors is heavily dependent upon the long-range organization (i.e., morphology) and the local relative arrangement of the transporting molecules. Here, we exploit London dispersion forces as a de ...

Amer Chemical Soc2015

Photoinduced Nonpersistent Radicals as Polarizing Agents for X-Nuclei Dissolution Dynamic Nuclear Polarization

Giovanni Boero, Christophe Roussel, Andrea Capozzi, Jean-Noël Hyacinthe, Tian Cheng, Arnaud Comment, Jacques Van Der Klink, Tim Rolf Eichhorn

Hyperpolarization via dissolution dynamic nuclear polarization (DNP) is a versatile method to dramatically enhance the liquid-state NMR signal of X-nuclei and can be used for performing metabolic and molecular imaging. It was recently demonstrated that ins ...

American Chemical Society2015

Wafer-level micro-structuring of glassy carbon

Hans Peter Herzig, Toralf Scharf, Karin Prater, Loïc Etienne Hans, Cédric Kilchoer

Glassy carbon is used nowadays for a variety of applicationsbecause of its mechanical strength, thermal stability and non-sticking adhesion properties. One application is glass molding that allows to realize high resolution diffractive optical elements on ...

Spie-Int Soc Optical Engineering2014

Silicone as a Multifunctional Material: Ultrafast Tuneable Lenses and Energy Harvesting Based on Silicone Membranes

Herbert Shea, Samuel Rosset, Luc Maffli, Michele Ghilardi

In recent years, the development of soft and stretchable electronics and sensors has seen the wide use of Polydimethylsiloxane (PDMS) as a convenient soft substrate on which such circuits are fabricated. When coupled with compliant electrodes, silicone mem ...

2014

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