کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9837886 | 1525285 | 2005 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dispersion of fullerenes in phospholipid bilayers and the subsequent phase changes in the host bilayers
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Dispersion of fullerenes in phospholipid bilayers and the subsequent phase changes in the host bilayers Dispersion of fullerenes in phospholipid bilayers and the subsequent phase changes in the host bilayers](/preview/png/9837886.png)
چکیده انگلیسی
We have studied the structure and phase transition characteristics of the fullerenes (C60)-embedded lipid bilayers. With small-angle neutron scattering (SANS), we have observed a degradation of bilayer ordering and a suppression effect on the phase transitions of the host vesicle bilayers of dipalmitoylphosphatidylcholine (DPPC), due to the embedment of fullerenes. The fullerene-embedded lipid system with substrate-oriented bilayers is also investigated using X-ray reflectivity and grazing incident small-angle X-ray scattering (GISAXS). In the depth direction, the multilamellar peaks observed in the X-ray reflectivity profile for the oriented DPPC/C60 bilayers reveal a larger head-to-head distance DHH of 50.6Â Ã
and a bilayer spacing D of 59.8Â Ã
, compared to the DHH=47.7Â Ã
and D=59.5Â Ã
for a pure DPPC membrane measured at the same conditions. Furthermore, the lipid head layers and water layers in the extracted electron density profile for the complex system are highly smeared, implying a fluctuating or corrugated structure in this zone. Correspondingly, GISAXS for the oriented DPPC/C60 membrane reveals stronger diffuse scatterings along the membrane plane than that for the pure DPPC system, indicating a higher in-plane correlation associated with the embedded fullerenes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physica B: Condensed Matter - Volume 357, Issues 1â2, 28 February 2005, Pages 193-198
Journal: Physica B: Condensed Matter - Volume 357, Issues 1â2, 28 February 2005, Pages 193-198
نویسندگان
U-Ser Jeng, Chia-Hung Hsu, Tsang-Lang Lin, Ching-Mao Wu, Hsin-Lung Chen, Lin-Ai Tai, Kuo-Chu Hwang,