کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10230232 | 783 | 2005 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Nanoscale variation in surface charge of synthetic hydroxyapatite detected by chemically and spatially specific high-resolution force spectroscopy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The normal intersurface forces between nanosized probe tips functionalized with COOâ- and NH3+-terminated alkanethiol self-assembling monolayers and dense polycrystalline phase pure synthetic hydroxyapatite (HA) were measured via a powerful nanomechanical technique called chemically specific high-resolution force spectroscopy. The data taken on approach of the probe tip to the HA surface was compared to the nonlinear Poisson-Boltzmann-based electrostatic double layer theory to predict the surface charge per unit area of the HA, ÏHA (C/m2), as a function of ionic strength, position within a variety of grains, and across grain boundaries. The average ÏHA was found to be â¼â0.02 C/m2 and to vary from â0.0037 to â0.072 C/m2 with nanoscale position in relation to grain boundaries and crystal planes up to â0.19 C/m2/μm. Positional measurement of nanoscale surface properties holds great promise in elucidating the molecular origins of physicochemical processes occurring at the biomaterial interface.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biomaterials - Volume 26, Issue 3, January 2005, Pages 271-283
Journal: Biomaterials - Volume 26, Issue 3, January 2005, Pages 271-283
نویسندگان
Jennifer Vandiver, Delphine Dean, Nelesh Patel, William Bonfield, Christine Ortiz,