1. Infrared-active quadruple contrast FePt nanoparticles for multiple scale molecular imaging.
- Author
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Chou, Shang-Wei, Liu, Chien-Liang, Liu, Tzu-Ming, Shen, Yu-Fang, Kuo, Lun-Chang, Wu, Cheng-Ham, Hsieh, Tsung-Yuan, Wu, Pei-Chun, Tsai, Ming-Rung, Yang, Che-Chang, Chang, Kai-Yao, Lu, Meng-Hua, Li, Pai-Chi, Chen, Shi-Ping, Wang, Yu-Hsin, Lu, Chen-Wen, Chen, Yi-An, Huang, Chih-Chia, Wang, Churng-Ren Chris, and Hsiao, Jong-Kai
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IRON alloys , *PLATINUM nanoparticles , *COMPUTED tomography , *PHOTOACOUSTIC effect , *GOLD nanoparticles - Abstract
A single nanomaterial with multiple imaging contrasts and functions is highly desired for multiscale theragnosis. Herein, we demonstrate single 1–1.9 μm infrared-active FePt alloy nanoparticles (FePt NPs) offering unprecedented four-contrast-in-one molecular imaging – computed tomography (CT), magnetic resonance imaging (MRI), photoacoustic (PA) imaging, and high-order multiphoton luminescence (HOMPL) microscopy. The PA response of FePt NPs outperforms that of infrared-active gold nanorods by 3- to 5.6-fold under identical excitation fluence and particle concentrations. HOMPL (680 nm) of an isolated FePt NP renders spatial full-width-at-half-maximum values of 432 nm and 300 nm beyond the optical diffraction limit for 1230-nm and 920-nm excitation, respectively. The in vivo targeting function was successfully visualized using HOMPL, PA imaging, CT, and MRI, thereby validating FePt as a single nanomaterial system covering up to four types (Optical/PA/CT/MRI) of molecular imaging contrast, ranging from the microscopic level to whole-body scale investigation. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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