A surface preparation

Depositing, in a vacuum, a thin layer of vaporized metal (generally aluminum) on a surface prepared by a base coat. 

Source U.S. EPA, References 5 and 7. a Surface preparation consists of dry operations. b This plant uses dry spray booths. 

Ramprashad, F. and K. Ronald. 1977. A surface preparation study on the effect of methylmercury on the sensory hair cell population in the cochlea of the harp seal (Pagophilus groenlandicus Erxleben, 1977). Canad. Jour. Zool. 55 223-230. 

Single crystals with a surface prepared so it exposes a certain crystal plane.29... 

There are several features to note about Figure 4.7. While water will bead on a surface prepared with PTFE or an FA, it will wet a nylon-6,6 surface. For the case of hexadecane, botlr PTFE and FA surfaces will show appreciable contact angles, while a nylon-6,6 surface will be wetted completely (0 = 0). This is the reason that oily soils are relatively difficult to remove from materials made from nylon-6,6. The surface of a material prepared with a FA using perfluoroalkyl chains often has a lower surface tension than PTFE. For comparison, the surface tensions of nylon-6,6, PTFE " and FAs are estimated to be about 46, 24, and 10-20 mN/m, respectively. 

Generally any deviation from a perfect surface is considered a defect and can originate from several sources, those that occur naturally on the clean surface or from contaminants. It is useful to understand the most common types of defect on the surface in order to interpret STM images of deposited adsorbates. It is also important to minimize these surface defects, especially from the perspective of nanoscale device construction on Si [17,18] where defects could alter device performance. A surface, prepared using standard annealing techniques in UHV, will typically contain a defect density of a few percent. 

To protect the aluminum joint from the effects of the environment, especially water and corrosion, an artificially thickened oxide layer is generally formed on the surface. Historically, chemical etching as a surface preparation has provided the surest way of obtaining durable adhesive bonds with aluminum. 

Landrock, A., Surface Preparation of Adherends, in Adhesives Technology Handbook, Noyes Publishing Co., Park Ridge, NJ, 1985. 

Figure 29 TPD spectra for m/e = 74 (curve a), 43 (curve b), 44 (curve c), 28 (curve d) and 2 (curves e) for a surface prepared by condensing 21 L of BuOH at 150 K on Li(15 ML)/Au(poly), heating to 200 K for 3 min to remove (most of the) excess bulk BuOH, and further exposing to carbon dioxide first (74 L) at 200 K and later at 130 K (34 L). A few minutes were allowed to elapse prior to the acquisition of the TPD data to pump excess gas phase C02. (From Ref. 4.)...

Fig. 13. (a) An atomically resolved STM image (150 A x 150 A) of a surface prepared as in Fig. lie. Small (1x1) terminated islands and patches of connected pseudohexagonal rosettes are seen, (b) Atomic model (top and side view) for the oxygen-induced structure observed in (a). A bulk-terminated (1x1) island is shown on the right side and the unit cell is indicated. Small white balls are Ti atoms. Shadowed large balls represent oxygen atoms darker shading indicates higher z-positions. The rectangle indicates the unit cell of the (1x1) structure. The network patch ( R ) on the left side consists of an incomplete Ti02(l 10)(lxl) layer and contains only atoms at bulk position. The strands probably have a structure similar to the added Ti203 model in Fig. 1 Ic. From ref. [102].

Id improve the reproducibility of the flatband potential in acetonitrile. In another stndy, exposing a freshly HF rinsed sample in methanol vapor as a surface preparation procedure caused a shift of the flatband potential of n-Si in acetonitrile +0.1 M LiClOa solntion from-0.02 Vsce to -0.51 V ee and it rednced the change of flatband potential with time possibly due to the formation of Si-O-CHj gronps. ... 

It is senseless to specifically list here the studies done with silver they are referenced throughout this review. Work on gold and copper is also relatively abundant and full coverage of all pertinent references is not attempted here. To detect SERS from these metals, excitation in the red is required. A surface preparation, ORC for instance, is often needed, as described in Section II.2. 

Ultraviolet Radiation Exposure - In adhesive bonding, a surface preparation technique in which the substrate is irradiated with high intensity UV light. Exposure to UV radiation results in chain scissions, crosslinking, and oxidation of the polymer surface. The effectiveness of this technique is dependent on the wavelength of radiation used. It is commonly used for polyolefins. Also called UV exposure. 

A surface preparation procedure requires completion of one, two, or all three of the following operations ... 

The force of adhesion F50 for a surface prepared from cellulose or a polyester resin was lower in the aqueous solution of sodium dodecyl sulfate by a factor of 2-5 in comparison with the values obtained in distilled water. 

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