期刊
JOURNAL OF PHYSICAL CHEMISTRY B
卷 108, 期 40, 页码 15608-15611出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp047829a
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A new class of potential magnetic resonance imaging contrast agents with nanosized mesoporous silica as the metal carrier is reported. Gadolinium-incorporated mesoporous silicas were synthesized by using longchain surfactant as a template. The products were characterized with X-ray powder diffraction, nitrogen adsorption-desorption isotherms, high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, Si-29-MAS NMR, and proton relaxivity. The materials showed much higher relaxivities, r(1) and r(2), than Gd-DTPA. The particles are nanosized and can enter cells easily. This is a completely novel biomedical application of mesoporous silica materials.
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