منابع مشابه
Interaction of hydrogen chloride with ice surfaces: the effects of grain size, surface roughness, and surface disorder.
Characterization of the interaction of hydrogen chloride (HCl) with polar stratospheric cloud (PSC) ice particles is essential to understanding the processes responsible for ozone depletion. The interaction of HCl with ice was studied using a coated-wall flow tube with chemical ionization mass spectrometry (CIMS) between 5x10(-8) and 10(-4) Torr HCl and between 186 and 223 K, including conditio...
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This paper reports on a laser speckle technique based on that which was first developed by Russo [1] to measure surface roughness. The technique has been extended to image surface roughness using laser scanning. A one dimensional laser scan is used with the second dimension required for imaging provided by movement of the surface. The technique uses two orthogonally polarised laser beams at a s...
متن کاملA Simple Algorithm to Relate Measured Surface Roughness to Equivalent Sand-grain Roughness
One of the most important resources available in the field of fluid mechanics, the Moody Chart gives Darcy friction factor as a function of Reynolds number and relative roughness. The experimentalists who generated the data correlated in the Moody Chart, however, roughened pipe surfaces by coating their internal surfaces with a monolayer of sand, the pipe wall roughness being defined as the ave...
متن کاملAdhesion as an interplay between particle size and surface roughness.
Surface roughness plays an important role in the adhesion of small particles. In this paper we have investigated adhesion as a geometrical effect taking into account both the particle size and the size of the surface features. Adhesion is studied using blunt model particles on surfaces up to 10 nm root-mean-square (RMS) roughness. Measurements with particles both smaller and larger than surface...
متن کاملGrain Sizes and Surface Roughness in Platinum and Gold Thin Films
We have used silicon and glass as substrate for gold and platinum thin films deposition. The film thickness are between 40 and 440 nm for gold and between 26 and 220 nm for platinum. We have analyzed these samples by scanning tunneling microscopy and by X ray diffraction. The crystallographic and morphological grain sizes are discussed.
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ژورنال
عنوان ژورنال: Surface and Interface Analysis
سال: 2008
ISSN: 0142-2421,1096-9918
DOI: 10.1002/sia.2849