کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7870674 | 1509190 | 2007 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Epitaxially grown colloidal crystals of silica microspheres on patterned substrate of triangular arrays
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
بیومتریال
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We have studied the colloidal self-assembly of silica microspheres on a glass substrate patterned with triangular dimple arrays of varying pitch. Using the same silica microspheres, both charge-stabilized and hard-sphere-like binary mixtures of microspheres and nanoparticles were prepared, and their gravitational sedimentation followed by colloidal crystallization were rigorously examined in real-space using a laser scanning confocal microscopy. In wet colloidal crystals, both systems showed a strong preference toward face centered cubic (fcc) stacking, the thermodynamically stable crystal form. After drying however, only the hard-sphere-like binary mixture of silica microspheres and zirconia nanoparticle maintained the initial templated fcc structure. The charge-stabilized system was disordered as the water was removed. Rigorous analysis of random defect structures such as stacking faults and vacancy concentration were carried out and discussed. Highly oriented colloidal crystals are of interest because of their potential use as templates for various applications.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: C - Volume 27, Issues 5â8, September 2007, Pages 961-967
Journal: Materials Science and Engineering: C - Volume 27, Issues 5â8, September 2007, Pages 961-967
نویسندگان
Wonmok Lee, Paul V. Braun,