scholarly journals Core@shell Fe3O4@Mn2+-doped NaYF4:Yb/Tm nanoparticles for triple-modality T1/T2-weighted MRI and NIR-to-NIR upconversion luminescence imaging agents

RSC Advances ◽  
2017 ◽  
Vol 7 (60) ◽  
pp. 37929-37937 ◽  
Author(s):  
Yang Luo ◽  
Sinan Du ◽  
Wei Zhang ◽  
Zhengfang Liao ◽  
Fang Zuo ◽  
...  
Keyword(s):  
Upconversion Luminescence ◽  
Shell Structures ◽  
Imaging Agents ◽  
Core Shell ◽  
Dual Mode ◽  
Luminescence Imaging

Core@shell structures of Fe3O4@Mn2+-doped NaYF4:Yb/Tm nanoparticles (NPs) were prepared and then used for in vivo NIR to NIR (980 nm to 800 nm) imaging, and as dual-mode T1/T2-weighted MRI because of the co-existence of Fe3O4 and Mn2+ in the NPs.

Preparation of core/shell NaYF 4 :Yb,Tm@dendrons nanoparticles with enhanced upconversion luminescence for in vivo imaging

2016 ◽  
Vol 12 (7) ◽  
pp. 2107-2113 ◽  
Author(s):  
Nadège Francolon ◽  
Damien Boyer ◽  
Felicia Leccia ◽  
Elodie Jouberton ◽  
Aurélie Walter ◽  
...  
Keyword(s):  
In Vivo Imaging ◽  
Upconversion Luminescence ◽  
Core Shell

Synergistically enhanced upconversion luminescence in Li+-doped core–shell-structured ultrasmall nanoprobes for dual-mode deep tissue fluorescence/CT imaging

2017 ◽  
Vol 5 (14) ◽  
pp. 2662-2670 ◽  
Author(s):  
Min Hu ◽  
Dandan Ma ◽  
Yuzhong Cheng ◽  
Chengcheng Liu ◽  
Zhipeng Zhang ◽  
...  
Keyword(s):  
Molecular Imaging ◽  
Penetration Depth ◽  
Multimodal Imaging ◽  
Upconversion Luminescence ◽  
Ct Imaging ◽  
Core Shell ◽  
Single System ◽  
Dual Mode ◽  
Deep Tissue ◽  
Tissue Fluorescence

The development of upconversion luminescence that allows for multimodal imaging in terms of resolution and penetration depth using a single system is attracting increasing interest for use in clinical molecular imaging and diagnostics.

Real-Time In Vivo Quantitative Monitoring of Drug Release by Dual-Mode Magnetic Resonance and Upconverted Luminescence Imaging

2014 ◽  
Vol 53 (18) ◽  
pp. 4551-4555 ◽  
Author(s):  
Jianan Liu ◽  
Jiwen Bu ◽  
Wenbo Bu ◽  
Shengjian Zhang ◽  
Limin Pan ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Drug Release ◽  
Real Time ◽  
Dual Mode ◽  
Luminescence Imaging ◽  
Quantitative Monitoring

Enhanced upconversion luminescence through core/shell structures and its application for detecting organic dyes in opaque fishes

2016 ◽  
Vol 15 (2) ◽  
pp. 260-265 ◽  
Author(s):  
Pan Hu ◽  
Xiaofeng Wu ◽  
Shigang Hu ◽  
Zenghui Chen ◽  
Huanyuan Yan ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Rhodamine B ◽  
Organic Dyes ◽  
Upconversion Luminescence ◽  
Shell Structures ◽  
Sodium Fluorescein ◽  
Core Shell

It confirms based on LRET that no Rhodamine B is absorbed by fishes after incubating in the aqueous solution of 1 μg ml−1 Rhodamine B for one day, contrary to sodium fluorescein.

scholarly journals Temperature-Independent Lifetime and Thermometer Operated in a Biological Window of Upconverting NaErF4 Nanocrystals

Nanomaterials ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 24 ◽  
Author(s):  
Kailei Lu ◽  
Yingxin Yi ◽  
Li Xu ◽  
Xianhao Sun ◽  
Lu Liu ◽  
...  
Keyword(s):  
Ambient Temperature ◽  
Time Domain ◽  
Upconversion Luminescence ◽  
Strong Interactions ◽  
Core Shell ◽  
Small Particle Size ◽  
Lanthanide Luminescence ◽  
Optical Thermometry ◽  
Thermal Probes

Lifetime of lanthanide luminescence basically decreases with increasing the ambient temperature. In this work, we developed NaErF4 core–shell nanocrystals with compensation of the lifetime variation with temperature. Upconversion lifetime of various emissions remains substantially unchanged as increasing the ambient temperature, upon 980/1530 nm excitation. The concentrated dopants, leading to extremely strong interactions between them, are responsible for the unique temperature-independent lifetime. Besides, upconversion mechanisms of NaErF4 core-only and core–shell nanocrystals under 980 and 1530 nm excitations were comparatively investigated. On the basis of luminescent ratiometric method, we demonstrated the optical thermometry using non-thermally coupled 4F9/2 and 4I9/2 emissions upon 1530 nm excitation, favoring the temperature monitoring in vivo due to both excitation and emissions fall in the biological window. The formed NaErF4 core–shell nanocrystals with ultra-small particle size, highly efficient upconversion luminescence, unique temperature-independent lifetimes, and thermometry operated in a biological window, are versatile in applications such as anti-counterfeiting, time-domain manipulation, and biological thermal probes.

Lectin-Conjugated Fe2O3@Au Core@Shell Nanoparticles as Dual Mode Contrast Agents for in Vivo Detection of Tumor

2014 ◽  
Vol 11 (3) ◽  
pp. 738-745 ◽  
Author(s):  
Xiuxia He ◽  
Fuyao Liu ◽  
Liang Liu ◽  
Taicheng Duan ◽  
Huimao Zhang ◽  
...  
Keyword(s):  
Contrast Agents ◽  
Core Shell ◽  
Dual Mode ◽  
Shell Nanoparticles ◽  
In Vivo Detection ◽  
Core Shell Nanoparticles

Real-Time In Vivo Quantitative Monitoring of Drug Release by Dual-Mode Magnetic Resonance and Upconverted Luminescence Imaging

2014 ◽  
Vol 126 (18) ◽  
pp. 4639-4643 ◽  
Author(s):  
Jianan Liu ◽  
Jiwen Bu ◽  
Wenbo Bu ◽  
Shengjian Zhang ◽  
Limin Pan ◽  
...  
Keyword(s):  
Magnetic Resonance ◽  
Drug Release ◽  
Real Time ◽  
Dual Mode ◽  
Luminescence Imaging ◽  
Quantitative Monitoring
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