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Hydrogen plasma surface activation of silicon for biomedical applications

Paper ID Volume ID Publish Year Pages File Format Full-Text
14070 1072 2007 5 PDF Available
Title
Hydrogen plasma surface activation of silicon for biomedical applications
Abstract

Silicon has gradually been recognized to be an essential trace element in the normal metabolism of higher animals, and the role of silicon in the human body has aroused interests in the biomedical community. In fact, the interactions between silicon-based devices and the human body such as biosensors and microelectromechanical systems (MEMS) often suffer from poor biocompatibility. In this work, hydrogen plasma immersion ion implantation (H-PIII) is conducted to improve the bioactivity or bone conductivity of silicon. In order to investigate the formation mechanism of bone-like apatite on the surface of the hydrogen implanted silicon wafer, two comparative experiments, hydrogenation and argon bombardment, are performed. The H-PIII sample exhibits an amorphous surface consisting of Si–H bonds. After immersion in simulated body fluids, a negatively charged surface containing the functional group (Si–O−) is produced and bone-like apatite is observed to nucleate and grow on the surface. The surface of the H-PIII silicon wafer favors the adhesion and growth of osteoblast cells and good cytocompatibility may be inferred.

Keywords
Hydrogen; Plasma immersion ion implantation; Silicon; Bioactivity
First Page Preview
Hydrogen plasma surface activation of silicon for biomedical applications
Publisher
Database: Elsevier - ScienceDirect
Journal: Biomolecular Engineering - Volume 24, Issue 1, February 2007, Pages 113–117
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering