What is it about?

This paper looks at detecting molecules adsorbed or reacted on silicon-based surfaces, in order to determine how their affect surface tensions - also called surface energy - and ultimately silicon-based surface interaction with fluids, such as water. The goal is to investigate how to control the behavior of silicon-based surfaces in medical implants devices, and minimize scarring and allergic reaction by controlling how these surfaces "wet" in a water-based liquid environment.

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Why is it important?

This study is important because it aims how to control the behavior of silicon-based surfaces in medical implants devices, and to minimize scarring and allergic reaction by controlling how these surfaces "wet" in a water-based liquid environment. In addition, the study looks at how detecting quantitatively the presence of adsorbates using particle beams can affect the surface composition and the measured surface energy. Identifying the artifacts from analysis is key in deducing from the actual measured values the true concentration of molecules and the initial surface energy.

Perspectives

This paper bridges the expertise we accumulated in controlling molecular adsorption and surface energy in semiconductors surfaces with the need for better understanding of surface interactions with water-based liquids in bio-medical implants surfaces and engineering. It also clearly demonstrates the need to use "damage curve" analysis instead of just one RBS spectrum to extract the correct values for atomic coverage on surfaces. It also demonstrates how Ion Beam Modification of Materials changes surface energy to specific values due to characteristic defects generated by the ion beam.

Prof. Nicole Herbots
Arizona State University

Read the Original

This page is a summary of: IBMM of OH adsorbates and interphases on Si-based materials, Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms, February 2012, Elsevier,
DOI: 10.1016/j.nimb.2011.01.094.
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