Selective chemical etching

Kirby S. H. and Wegner M. W. (1978). Dislocation substructure of mantle-derived olivine as revealed by selective chemical etching and transmission electron microscopy. Phys. Chem. Minerals, 3 309-330. 

Ion beams provide useful information either as a diagnostic tool or as a precision etching method in adhesion research. The combination ISS/SIMS method used along with other techniques such as SEM provides a powerful tool for elemental analysis of surface composition. These results, as well as earlier work in this laboratory, indicate that the surface composition can be significantly different from the bulk due to contamination, selective chemical etching and segregation. These same techniques also provide an analysis of the mode of failure in adhesive joints. Many failures classified as "adhesive" on the basis of visual inspection are frequently mixed mode failures or failures at a new interface containing elements of both adhesives and adherend. 

Figures 1IC-E show SEM images of test patterns of silver that were fabricated using pCP with hexadecanethiol, followed by selective chemical etching [102], The SAMs protect the underlying substrates from dissolving by blocking the dilSisional access of etchants. The ability to generate arrays of microstructures of coinage metals with controlled shapes and dimensions is directly useful in fabricating sensors and arrays of microelectrodes.

Fig. 7.32 SEM pictures of Co-Cu alloy electrodeposit cross sections after selective chemical etching of the Cu phase. Bright parts represent the Co-rich phase, while dark parts represent the etched Cu phase. Off-time (ms) 16 (a), 80 (b), 400 (c), and 1600 (d) (Reprinted from Ref. [55] with the permission of Elsevier)...

Porous silicon template could be carefully removed via selective chemical etching in tetramethyl ammonium hydroxide (TMAH) solution at 40-90 °C. Such dissolution process is crucial and not so easy to control. The etch rate is not the same for different Si templates. It depends on the Si dopant type and level as well as on the pore depth and diameter. The removal of template could be done using KOH solution, but the etching behavior is completely different from the case of TMAH. Ethylene diamine pyrocatechol is also reported as a chemical etch solution at 115 °C to successfully... 

Asoh H, Arai F, Ono S (2007a) Site-selective chemical etching of silicon using patterned silver catalyst. Electrochem Commun 9(4) 535-539... 

Qi an BT, Shen ZQ. (2005) Fabrication of superhydrophobic surfaces by dislocation-selective chemical etching on aluminum, copper, and zinc substrates. Langmuir 21 9007-9009. 

Figure 1.14. Wheat sheaf form of a selective chemical etched PP 3-spherulite in an injection molded pai t...

Maruyama, K., Ohkawa, H., Ogawa, S., Ueda, A., Niwa, O., Suzuki, K. Fabrication and characterization of a nanometer-sized optical fiber electrode based on selective chemical etching for scanning electro-chemical/optical microscopy. Anal Chem 2006, 78, 1904—1912. 

The defined-defect-contained colloidal crystals could be utilized as a mold for producing inverse PhC structures with ideal lattices and with sufficiently high refractive index contrast. The artificially induced defects could be removed by further processing Hke selective chemical etching or sinter-... 

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