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Your search keyword '"Monirehalsadat Mousavi"' showing total 3 results
Start Over Author "Monirehalsadat Mousavi" Topic doping
3 results on '"Monirehalsadat Mousavi"'

1. Improving penetration depth in biological imaging using Nd3+/Yb3+/Er3+-doped upconverting nanoparticles

Author

Hugo Söderlund, Monirehalsadat Mousavi, Stefan Andersson-Engels, and Haichun Liu

Subjects
Materials science, business.industry, Doping, equipment and supplies, 01 natural sciences, Signal, 010309 optics, 0103 physical sciences, Optoelectronics, Upconverting nanoparticles, business, Biological imaging, Penetration depth, Tissue phantom, Preclinical imaging
Abstract

We have synthesized and evaluated in tissue phantom measurements a new type of Nd-codoped upconverting nanoparticles. They provide improved signal strengths from deep regions in a tissue phantom as compared to conventional upconverting nanoparticles, a result also suggesting they will provide less issues with heating the tissue during measurements.

Published
2016
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2. Increasing depth penetration in biological tissue imaging using 808-nm excited Nd3+/Yb3+/Er3+-doped upconverting nanoparticles

Author

Haichun Liu, Monirehalsadat Mousavi, Hugo Söderlund, and Stefan Andersson-Engels

Subjects
Ytterbium, Materials science, Biomedical Engineering, Contrast Media, Metal Nanoparticles, chemistry.chemical_element, Nanoparticle, Nanotechnology, Sensitivity and Specificity, Neodymium, Biomaterials, Erbium, Image Interpretation, Computer-Assisted, Particle Size, Phantoms, Imaging, business.industry, Doping, Reproducibility of Results, Image Enhancement, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Wavelength, Thulium, Microscopy, Fluorescence, chemistry, Excited state, Optoelectronics, business, Algorithms
Abstract

Ytterbium (Yb 3+ )-sensitized upconverting nanoparticles (UCNPs) are excited at 975 nm causing relatively high absorption in tissue. A new type of UCNPs with neodymium (Nd 3+ ) and Yb 3+ codoping is excitable at a 808-nm wavelength. At this wavelength, the tissue absorption is lower. Here we quantify, both experimentally and theoretically, to what extent Nd 3+ -doped UCNPs will provide an increased signal at larger depths in tissue compared to conventional 975-nm excited UCNPs.

Published
2015
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3. Deep tissue imaging using Nd-doped upconverting nanoparticles

Author

Haichun Liu, Hugo Söderlund, Can T. Xu, Monirehalsadat Mousavi, and Stefan Andersson-Engels

Subjects
Materials science, business.industry, Physics::Medical Physics, Doping, Physics::Optics, Nanoparticle, Deep tissue imaging, Photon upconversion, Diffuse optical imaging, Optoelectronics, Upconverting nanoparticles, Molecular imaging, business, Excitation
Abstract

Deep tissue excitation of upconverting nanoparticles is limited for biomedical applications by water absorption. By modifying the nanoparticles to shift the excitation wavelength, we demonstrate better depth sensitivity.

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