Contact printing procedure

Scheme 3 Procedure used for preparing patterned hyperbranched poly(acrylic acid) films by /x-contact printing...

In the case of contact printing the surface is contacted for probe deposition. Various types of pin tools have been developed to facilitate reproducible droplet release within a volume from 50 pi-100 nl (Fig. 2). The typical feature size resulting from this procedure is in a range from 100-300 im. The main drawback of this application is the lack of durability owing to the tapping force and possible damage to the surface coating. 

Figure 10.15 Schematic procedure for micro-contact printing, (for colour version see colour section at the end of the book).

We have developed a number of techniques for patterning SAMs in the plane of the monolayer [57-64]. The objective of these methods is to provide procedures for achieving true meso-scale fabrication — that is, fabrication leading to structures with dimensions in the range of 10 nm to 10 pm — using techniques available in synthetic chemical laboratories. The most versatile of these techniques is one based on contact printing (which we call microcontact printing, pCP) [60,64]. 

Procedure Micro-Contact Printing Using PDMS Stamp... 

Figure 13.9. (A) Procedure for micro-contact printing and etching of a Au-CD.

Microbiological and Biomedical Laboratories, jointly produced by the U.S. Department of Health and Human Services/Public Health Service, the Center for Disease Control and Prevention, and the National Institutes of Health. This procedure is finely written, but sometimes not followed in practice. The 4th ed., May, 1999, quoted here is available by contacting the Government Printing Office, Washington, D.C (priced at 12.00 per copy in 1999). 

This membrane is normally employed in what is called a symmetrical configuration , to form the classical ISE which employs an internal reference solution, as sketched in Figure 30.8. This membrane can also be used directly fixed on a solid contact, per example a metallic wire or a screen-printed substrate, in the coated-wire configuration [77]. The proposed Procedure 45 (see in CD accompanying this book) suggests the use of coated wire sensors, as these are the easiest to construct. 

---