کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1792748 1023656 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dipeptide-assisted growth of uniform gallium oxohydroxide spindles
موضوعات مرتبط
مهندسی و علوم پایه فیزیک و نجوم فیزیک ماده چگال
پیش نمایش صفحه اول مقاله
Dipeptide-assisted growth of uniform gallium oxohydroxide spindles
چکیده انگلیسی

The catalytic dipeptide His–Ser was used as an additive in mineralizing gallium ions to form GaOOH, a solid precursor of Ga2O3. This dipeptide was chosen to mimic the enzyme structure of silicatein, similar to the well-known catalytic triad of chymotrypsin. The dipeptide promoted formation of spindle-structured GaOOH under acidic conditions by behaving as a heterogeneous nucleation seed. In contrast, no well-defined, structured gallium species were produced in the absence of dipeptide. The catalytic function of the dipeptide was most pronounced at pH values in the range 3–5, which are lower than the pKa of imidazole in the His side chain. These results suggest that the catalytic role of dipeptide influences the gallium hydroxide conversion and growth. This study suggests that a designed peptide with active functionality can be further exploited to produce inorganic compounds with controlled nucleation and growth.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 312, Issue 14, 1 July 2010, Pages 2107–2112
نویسندگان
, , , ,