Self-Assembled Monolayers and Polymer Brushes in Biotechnology: Current Applications and Future Perspectives

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Abstract

The chemistry and topography of a surface affect biological response and are of fundamental importance, especially when living systems encounter synthetic surfaces. Most biomolecules have immense recognition power (specific binding) and simultaneously have a tendency to physically adsorb onto a solid substrate without specific receptor recognition (nonspecific adsorption). Therefore, to create useful materials for many biotechnology applications, interfaces are required that have both enhanced specific binding and reduced nonspecific binding. Thus, in applications such as sensors, the tailoring of surface chemistry and the use of micro or nanofabrication techniques becomes an important avenue for the production of surfaces with specific binding properties and minimal background interference. Both self-assembled monolayers (SAMs) and polymer brushes have attracted considerable attention as surface-active materials. In this review, we discuss both of these materials with their potential applications in biotechnology. We also summarize lithographic methods for pattern formation using combined top-down and bottom-up approaches and briefly discuss the future of these materials by describing emerging new applications.

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