Journal of the Korean Physical Society

pISSN 0374-4884 eISSN 1976-8524


Cross-Disciplinary Physics and Related Areas of Science and Technology

J. Korean Phy. Soc. 2011; 59(3): 2376-2380

Published online September 15, 2011

Copyright © The Korean Physical Society.

Longitudinal Water Proton Relaxivities of Gd(OH)3 Nanorods, Gd(OH)3 Nanoparticles, and Gd2O3 Nanoparticles: Dependence on Particle Diameter, Composition, and Morphology

Ja Young Park, Krishna Kattel, Wenlong Xu, Han Gyeol Kim, Eun Jung Lee, Gang Ho Lee, Jae Jun Lee, Yongmin Chang, Tae Jeong Kim


Gd(OH)3 nanorods, Gd(OH)3 nanoparticles, and Gd2O3 nanoparticles were prepared and their longitudinal water proton relaxivities (r1s) were investigated. They are important for application to a highly sensitive T1 MRI contrast agent. The r1s did not much depend on either composition or morphology but on particle diameter such that an optimal particle diameter (¡­1.7 nm) exists for a maximal r1 (~ 15.2 s-1mM-1). This is interpreted such that surface Gd(III) ions mainly contribute to the r1.

Keywords: Longitudinal water proton relaxivity, Gd(OH)3, Gd2O3, Nanorod, Nanoparticle