کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1678803 1518368 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mapping the tip–sample interactions on DPPC and DNA by dynamic force spectroscopy under ambient conditions
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Mapping the tip–sample interactions on DPPC and DNA by dynamic force spectroscopy under ambient conditions
چکیده انگلیسی

Self-assembled monolayers of DPPC and DNA adsorbed on mica are examined by dynamic force spectroscopy under ambient conditions. By a systematic recording of the frequency shift caused by the tip–sample interaction we determine the corresponding tip–sample potential and force curves. In difference to the conventional measurement of force-vs.-distance curves this technique allows the continuous measurement of tip–sample forces without instabilities caused by a jump-to-contact. Due to the systematic mapping of the tip–sample interaction we are able to compute contour maps of the tip-surface potential of the DPPC films and to extract local properties like contact stiffness and adhesion force. The lateral resolution capabilities of the introduced spectroscopy method are examined by the example of lambda phage DNA.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultramicroscopy - Volume 107, Issues 10–11, October 2007, Pages 875–881
نویسندگان
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