Gd(III) doping effect on magnetization and water proton relaxivities in ultra small iron oxide nanoparticles
oleh: Eun Sook Choi, Wenlong Xu, Myung Ju Baek, Ja Young Park, Joo Hyun Kim, Yongmin Chang, Tae Jeong Kim, Gang Ho Lee
| Format: | Article |
|---|---|
| Diterbitkan: | AIP Publishing LLC 2013-07-01 |
Deskripsi
Two samples of ultra small Gd(III) doped iron oxide nanoparticles were prepared to investigate Gd(III) doping effect on longitudinal (r1) and transverse (r2) water proton relaxivities. Gd(III) doping mole percents were 0.2 and 0.4 for samples 1 and 2, respectively. Average particle diameters were 2.5 to 2.1 nm for samples 1 and 2, respectively. Reduced r1 and r2 values were observed in both samples. We attributed this to reduced magnetizations arising from opposing effect of Gd(III) to net magnetizations of Fe(III)/Fe(II) in oxide nanoparticles.