TAILIEUCHUNG - Báo cáo hóa học: " Enhanced functionalization of Mn2O3@SiO2 core-shell nanostructures"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Enhanced functionalization of Mn2O3@SiO2 core-shell nanostructures | Vaidya et al. Nanoscale Research Letters 2011 6 169 http content 6 1 169 o Nanoscale Research Letters a SpringerOpen Journal NANO EXPRESS Open Access Enhanced functionalization of Mn2O3@SiO2 core-shell nanostructures Sonalika Vaidya Pallavi Thaplyal Ashok Kumar Ganguli Abstract Core-shell nanostructures of Mn2O3@SiO2 Mn2O3@amino-functionalized silica Mn2O3@vinyl-functionalized silica and Mn2O3@allyl-functionalized silica were synthesized using the hydrolysis of the respective organosilane precursor over Mn2O3 nanoparticles dispersed using colloidal solutions of Tergitol and cyclohexane. The synthetic methodology used is an improvement over the commonly used post-grafting or co-condensation method as it ensures a high density of functional groups over the core-shell nanostructures. The high density of functional groups can be useful in immobilization of biomolecules and drugs and thus can be used in targeted drug delivery. The high density of functional groups can be used for extraction of elements present in trace amounts. These functionalized core-shell nanostructures were characterized using TEM IR and zeta potential studies. The zeta potential study shows that the hydrolysis of organosilane to form the shell results in more number of functional groups on it as compared to the shell formed using post-grafting method. The amino-functionalized core-shell nanostructures were used for the immobilization of glucose and L-methionine and were characterized by zeta potential studies. Introduction Surface modification is an integrated and crucial part of material processing and is the basis for the functionality of the material. These functional groups provide further accessibility for anchoring other substrates or complexes such as biomolecules or metal ions into the pores and channels of the carrier material. Surface modification of materials started in early 1990. Badley et al. modified the surface of colloidal silica particles with .

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