Is XPS foam the same as Styrofoam?
Styrofoam is a trademarked brand of closed-cell extruded polystyrene foam, or XPS. This foam is also referred to as “Blue Board” and is used for building insulation, thermal insulation and water barriers.
What is XPS work function?
The work function is important in XPS spectra but we just don't call it a work function. The work function is effectively a chemical binding energy. If we measure the energy of the electron from an isolated atom then compare it with the energy from an electron in some solid we find they are different.
What is the basic principle of XPS and for what this is used what is the difference between XPS and XRD?
In XPS, the atoms of the sample's surface absorb X-rays and emit electrons, but in XRF the atoms of the sample both absorb and emit X-rays. In XRD, the atoms of the sample do not absorb X-rays at all, they just reflect them.
What are the components of XPS?
XPS instruments have the following components: Ultrahigh vacuum system; typically operating conditions are at <10-9 Torr. ... X-ray source; Al Kα of Mgα X-rays are typically used to excite the sample; a monochrometer is used to permit only X-rays of this fixed energy to impinge on the sample.
How do you calculate work function from UPS?
UPS Calculations The work function was calculated by subtracting the He I radiation energy of 21.2 eV from the high-binding- energy cutoff at 17.5 eV (Fig. S2a): 17.5 (± 0.1) eV – 21.2 eV = –3.7 ± 0.1 eV versus vacuum.
What are the main applications of XPS?
XPS is routinely used to analyze inorganic compounds, metal alloys, semiconductors, polymers, elements, catalysts, glasses, ceramics, paints, papers, inks, woods, plant parts, make-up, teeth, bones, medical implants, bio-materials, coatings, viscous oils, glues, ion-modified materials and many others.
What is the principle of XPS and used?
X-ray photoelectron spectroscopy (XPS), also known as electron spectroscopy for chemical analysis (ESCA), is used to determine quantitative atomic composition and chemistry. It is a surface analysis technique with a sampling volume that extends from the surface to a depth of approximately 50–70 Å.
Why is XPS important?
XPS is a powerful measurement technique because it not only shows what elements are present, but also what other elements they are bonded to. The technique can be used in line profiling of the elemental composition across the surface, or in depth profiling when paired with ion-beam etching.
What is XPS in architecture?
Daneel Pretorius, Category Manager for Swartland's Summit range, says XPS (Extruded polystyrene) foam board creates a single layer of thermal- and moisture-protection on walls, roofs or floors, greatly boosting buildings' overall energy-efficiency and legal compliance.
What is the difference between EPS and XPS?
EPS has a water vapour diffusion resistance of 30-70, whereas XPS reaches 80-250. Slightly more permeable to air and moisture, EPS is less resistant to water vapour than XPS. If you're looking to insulate a space prone to humidity (e.g. floors, cellars, and foundation walls), XPS is your best option.