کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
702341 1460804 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influence of the surface termination of ultrananocrystalline diamond/amorphous carbon composite films on their interaction with neurons
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
پیش نمایش صفحه اول مقاله
Influence of the surface termination of ultrananocrystalline diamond/amorphous carbon composite films on their interaction with neurons
چکیده انگلیسی

Ultrananocrystalline diamond (UNCD) films have been deposited by microwave plasma chemical vapor deposition from 17% CH4/N2 mixtures. In order to change the original hydrogen termination of the UNCD surfaces, the films have subsequently been subjected either to the so-called UV/O3 treatment which leads to OH-terminated surfaces, or to NH3/N2 plasmas which introduces NH2 groups but also a certain amount of OH groups. These three types of surfaces have been characterized by X-ray photoelectron spectroscopy, contact angle and ζ-potential measurements. The contact angle measurements have shown that as-grown UNCD surfaces are highly hydrophobic but became highly hydrophilic after both treatments. The ζ-potential measurements revealed that the isoelectric point of the H-terminated as-grown surface is distinctively higher than that of either UV/O3 or NH3/N2 plasma treated surfaces. Finally, the interactions of these surfaces with neurons of the cockroach Leucophaea maderae have been investigated. These studies have shown that especially the two treated surfaces allow for a fast, strong attachment of these cells without compromising their viability and without changing their normal physiological responses. These results will be discussed in terms of those obtained with the different surface characterization techniques.


► The surface termination of ultrananocrystalline diamond films have been changed by plasma and photochemical processes.
► The resulting surfaces have been characterized by XPS, contact angle and zeta potential measurements.
► The interaction of the resulting surfaces with neuronal cells have been investigated.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Diamond and Related Materials - Volume 26, June 2012, Pages 60–65
نویسندگان
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