Surface chemistry responses

Capillary electrophoretic separations are performed in small diameter tubes, made of Teflon, polyethylene, and other materials. The most frequently used material is fused silica. Fused silica capillaries are relatively inexpensive and are available in different internal and external diameters. An important advantage of a fused silica capillary is that the inner surface can be modified easily by either chemical or physical means. The chemistry of the silica surface is well established due to the popularity of silica surfaces in gas chromatography (GC) and liquid chromatography (LC). In capillary electrophoresis, the silica surface is responsible for the EOF. Using surface modification techniques, the zeta potential and correspondingly the EOF can be varied or eliminated. Column fabrication has been done on microchips.13... 

L4szl6 K, Czakkel O, Josepovits K, Rochas C, Geissler E (2005) Influence of surface chemistry on the SAXS response of polymer-based activated carbons. Langmuir 21 8443-8451... 

Two techniques are principally responsible for the experimental development of dynamics in surface chemistry. These are the application of molecular beams and laser state-to-state techniques to gas-surface interactions. This roughly parallels their application to gas phase chemistry, although there are certainly some different technical requirements. More detailed discussion of some of these experimental techniques are in Refs. [104] and [105]. 

Advancements in the area of optical biosensors for nucleic acid determinations have been substantial and many design concepts and surface chemistries have been explored. A practical solution that provides for all of the desired biosensor attributes - reusability, robustness, reliability, selectivity, sensitivity and speed of response - in a single device has not yet been... 

Brodbeck WG, Voskerician G, Ziats NP, Nakayama Y, Matsuda T, Anderson JM. In vivo leukocyte cytokine mRNA responses to biomaterials are dependent on surface chemistry. Journal ofBiomedicalMaterials Research A 2003, 64, 320-329. 

The study by Hsieh and Teng [11] can conveniently set the stage for the discussion that follows. It illustrates well how challenging it is to interpret the electrochemical effects in terms of specific changes in carbon surface chemistry. The authors argued that the following three processes may be responsible for these effects in an acidic solution ... 

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