We present a straightforward, accessible method for the fabrication of micropores with diameters from 2 to 800 micro m in films of amorphous Teflon (Teflon AF). Pores with diameters </=40 micro m made it possible to record ion fluxes through ion channels in planar bilayers with excellent signal characteristics. These pores afforded: i), stable measurements at transmembrane voltages up to 460 mV...

Polytetrafluoroethylene (PTFE), conventionally known as Teflon, has remarkable properties: it doesn’t combine with oxygen; no solvent can corrode it; conduct electricity; and is among the slipperiest substances on earth. Although most widely a non-stick coating for pots pans, one of first applications polymer was seals gaskets separation process uranium hexafluoride that key to developing nucle...

Abstract In the growing application field of electrowetting (EW), reliable control wetting behavior by an applied voltage is required over a wide temperature range. Despite rising interest EW, only few data are reported in literature on EW as function temperature. this paper, we investigate quasi-static response one most widely used hydrophobic materials, Teflon AF1600, range from 25 to 70 $$\,...

The most common approach in the search for the optimal low temperature fuel cell catalyst remains "trial and error". Therefore, large numbers of different potential catalytic materials need to be screened. The well-established and most commonly used method for testing catalytic electrochemical activity under well-defined hydrodynamics is still thin film rotating disc electrode (TF-RDE). Typical...

Teflon chambers are ubiquitous in studies of atmospheric chemistry. Secondary organic aerosol (SOA) formation can be underestimated, owing to deposition of SOAforming vapors to the chamber wall. We present here an experimental protocol and a model framework to constrain the vapor–wall interactions in Teflon chambers. We measured the wall deposition rates of 25 oxidized organic compounds generat...

BACKGROUND Tissue dielectric properties are specific to physiological changes and consequently have been pursued as imaging biomarkers of cancer and other pathological disorders. However, a recent study (Phys Med Biol 52:2637-2656, 2007; Phys Med Biol 52:6093-6115, 2007), which utilized open-ended dielectric probing techniques and a previously established sensing volume, reported that the diele...

Endoscopic Pen-urethral Teflon injection offers a simple form of treatment with a low morbidity rate for some patients with urinary incontinence. It is particularly useful in patients with stress incontinence, post-prostatectomy incontinence and in some cases of neuropathic incontinence. Findings in a group of ten patients who underwent this technique are presented. Seventy percent of patients ...