کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
703140 891127 2007 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Inhomogeneous DNA bonding to polycrystalline CVD diamond
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی برق و الکترونیک
پیش نمایش صفحه اول مقاله
Inhomogeneous DNA bonding to polycrystalline CVD diamond
چکیده انگلیسی

Double stranded deoxyribonucleic acid (ds-DNA) layers, bonded to hydrogen terminated polycrystalline diamond, are characterized by scanning electron (SEM), fluorescence (FM), and atomic force microscopy (AFM). DNA grafting has been achieved using photochemical bonding of ω-unsaturated 10-amino-dec-1-ene molecules. SEM detects local variations of electron affinities on polycrystalline diamond, revealing distinct grain structures. FM applied on fluorescence labeled ds-DNA show laterally varying intensities of typically 20%, which resembles also grain structure as detected by SEM. Contact and tapping-mode AFM characterization reveal a tilted DNA bonding to diamond and a dense layer formation which gives rise to smoothening of surface properties. The lateral density variation of DNA is attributed to local variations of the photo-electron emission efficiency which affects the photochemical attachment chemistry of amine-linker molecules to diamond.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Diamond and Related Materials - Volume 16, Issue 8, August 2007, Pages 1648–1651
نویسندگان
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