Optical Temperature Sensing of Core-Shell Structured NaYF4:Yb3+, Er3+@NaYF4 Nanocrystals with Different Shell Thickness

2015 ◽  
Vol 738-739 ◽  
pp. 27-30
Author(s):  
Dong Dong Li ◽  
Qi Yue Shao ◽  
Yan Dong ◽  
Jian Qing Jiang
Keyword(s):  
Shell Thickness ◽  
Thermal Sensitivity ◽  
Upconversion Luminescence ◽  
Temperature Sensing ◽  
Upconversion Nanoparticles ◽  
Core Shell ◽  
Sensing Properties ◽  
The Core ◽  
Β Phase ◽  
Biomedical Fields

Hexagonal (β)-phase NaYF4:Yb3+, Er3+ upconversion nanoparticles (UCNPs) with and without an inert (undoped NaYF4) shell have been successfully synthesized and the effects of shell thickness on the upconversion luminescence (UCL) and temperature sensing properties were systematically investigated. It was found that the NaYF4 shell and its thickness do not affect the RHS values and thermal sensitivity, but can obviously improve the UCL intensity of NaYF4:Yb3+, Er3+ UCNPs. It implies that the core-shell structured NaYF4:Yb3+, Er3+@NaYF4 UCNPs with excellent UCL properties have great potential to be used as temperature sensing probes in biomedical fields, without considering the influences of the shell thickness on their temperature sensing properties.

scholarly journals Upconversion luminescence and temperature sensing properties of NaGd(WO4)2:Yb3+/Er3+@SiO2 core–shell nanoparticles

RSC Advances ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 3981-3989
Author(s):  
Lu Zheng ◽  
Xinyi Huang ◽  
Jiuping Zhong ◽  
Zijun Wang ◽  
Xiaoning Cheng
Keyword(s):  
Upconversion Luminescence ◽  
Silica Shell ◽  
Temperature Sensing ◽  
Upconversion Nanoparticles ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Sensing Properties ◽  
The Core ◽  
Thermal Sensing ◽  
Core Shell Nanoparticles

A shell of SiO2 with tunable thickness was uniformly coated on NaGd(WO4)2:Yb3+/Er3+ core upconversion nanoparticles (UCNPs). The effects of the silica shell on UC luminescence and thermal sensing properties of the core–shell UCNPs were investigated.

Multifunctional NaYF4:Yb3+, Er3+@Au Nanocomposites: Upconversion Luminescence, Temperature Sensing and Photothermal Therapy

2015 ◽  
Vol 1088 ◽  
pp. 23-27 ◽  
Author(s):  
Dong Dong Li ◽  
Qi Yue Shao ◽  
Yan Dong ◽  
Jian Qing Jiang
Keyword(s):  
Gold Nanoparticles ◽  
Photothermal Therapy ◽  
Upconversion Luminescence ◽  
Separation Distance ◽  
Temperature Sensing ◽  
Upconversion Nanoparticles ◽  
Composite Nanostructures ◽  
Sensing Properties ◽  
Quenching Effect ◽  
Biomedical Fields

Composite nanostructures of NaYF4:Yb3+, Er3+@Au have been successfully prepared by attaching gold nanoparticles onto the surface of NaYF4: Yb3+, Er3+ upconversion nanoparticles (UCNPs). NaYF4 inert shell was used to adjust the separation distance between gold nanoparticles and UCNPs. Effects of the gold nanoparticles on their upconversion luminescent (UCL), temperature sensing and photothermal therapy properties were systematically investigated. For all samples, a slight decrease of the UCL intensity was observed after gold nanoparticles attachment, suggesting that the nonradiative quenching effect is the dominant interaction between UCNPs and gold nanoparticles. However, the reduction of the UCL intensity is negligible due to the significant improvement of UCL properties by NaYF4shell. In addition, the gold attachment can obviously improve the photothermal conversion effect, but do not affect the temperature sensing properties of NaYF4:Yb3+, Er3+ UCNPs, indicating their high capability for multifunctional applications in biomedical fields.

The effect of shell thickness on gas sensing properties of core-shell fibers

2021 ◽  
Vol 332 ◽  
pp. 129456
Author(s):  
Ming Zhang ◽  
Ning Sui ◽  
Rui Wang ◽  
Tong Zhang
Keyword(s):  
Shell Thickness ◽  
Gas Sensing ◽  
Core Shell ◽  
Sensing Properties ◽  
Gas Sensing Properties

scholarly journals Synthesis and Control of the Shell Thickness of Polyaniline and Polypyrrole Half Hollow Spheres Using the Polystyrene Cores

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Su-Ryeon Yun ◽  
Gyeong-Ok Kim ◽  
Chan Woo Lee ◽  
Nam-Ju Jo ◽  
Yongku Kang ◽  
...  
Keyword(s):  
Shell Thickness ◽  
Hollow Spheres ◽  
Core Shell ◽  
Chemical Structures ◽  
The Core ◽  
Vis Spectroscopy ◽  
Ft Ir ◽  
Core Shell Structure ◽  
And Control ◽  
Ft Ir Spectroscopy

Polyaniline (Pani) and polypyrrole (Ppy) half hollow spheres with different shell thicknesses were successfully synthesized by three steps process using polystyrene (PS) as the core. The PS core was synthesized by emulsion polymerization. Aniline and pyrrole monomers were polymerized on the surface of the PS core. The shells of Pani and Ppy were fabricated by adding different amounts of aniline and pyrrole monomers. PS cores were dissolved and removed from the core shell structure by solvent extraction. The thicknesses of the Pani and Ppy half hollow spheres were observed by FE-SEM and FE-TEM. The chemical structures of the Pani and Ppy half hollow spheres were characterized by FT-IR spectroscopy and UV-Vis spectroscopy. The shell thicknesses of the Pani half hollow spheres were 30.2, 38.0, 42.2, 48.2, and 52.4 nm, while the shell thicknesses of the Ppy half hollow spheres were 16.0, 22.0, 27.0, and 34.0 nm. The shell thicknesses of Pani and Ppy half hollow spheres linearly increased as the amount of the monomer increased. Therefore, the shell thickness of the Pani and Ppy half hollow spheres can be controlled in these ranges.

Upconversion Luminescence and Temperature Sensing Properties for Sc2(WO4)3:Er3+/Yb3+

2021 ◽  
Vol 42 (1) ◽  
pp. 91-97
Author(s):  
Ye JIN ◽  
◽  
Kun LI ◽  
Xu LUO ◽  
Li MA ◽  
...  
Keyword(s):  
Upconversion Luminescence ◽  
Temperature Sensing ◽  
Sensing Properties

Core@shell nanostructured Au-d@NimPtm for electrochemical oxygen reduction reaction: effect of the core size and shell thickness

2019 ◽  
Vol 9 (17) ◽  
pp. 4668-4677 ◽  
Author(s):  
Min Zhang ◽  
Shu Miao ◽  
Bo-Qing Xu
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Shell Thickness ◽  
Reduction Reaction ◽  
Core Shell ◽  
Core Size ◽  
The Core ◽  
Electrocatalytic Performance ◽  
Electrochemical Oxygen

Au-d@NimPtm nanostructures are studied to address the effects of the Au-core size (d) and NiPt-shell thickness (m) on the electrocatalytic performance of Pt for the ORR.

Enhancing upconversion luminescence and thermal sensing properties of Er/Yb co‐doped oxysulfide core‐shell nanocrystals

2020 ◽  
Vol 104 (2) ◽  
pp. 985-994
Author(s):  
Jianxin Jiao ◽  
Yuwei Liu ◽  
Hong Wang ◽  
Xiumei Yin ◽  
Mingming Xing ◽  
...  
Keyword(s):  
Upconversion Luminescence ◽  
Core Shell ◽  
Sensing Properties ◽  
Thermal Sensing ◽  
Co Doped

Effect of the core-shell impact modifier shell thickness on toughening PVC

2004 ◽  
Vol 44 (10) ◽  
pp. 1885-1889 ◽  
Author(s):  
Juh-Shyong Lee ◽  
Feng-Chih Chang
Keyword(s):  
Shell Thickness ◽  
Core Shell ◽  
The Core ◽  
Impact Modifier
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