Nanocomposites of Au Nanorods and Core–Shell NaGdF4:Yb3+,Er3+@NaYF4 Upconversion Nanoparticles for Temperature Sensing

2020 ◽  
Vol 3 (10) ◽  
pp. 9679-9685 ◽  
Author(s):  
Junshan Hu ◽  
Ruonan Wang ◽  
Rangrang Fan ◽  
Fengyi Wang ◽  
Huiyu Xiong ◽  
...  
Keyword(s):  
Temperature Sensing ◽  
Upconversion Nanoparticles ◽  
Core Shell ◽  
Au Nanorods

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.

794 nm excited core–shell upconversion nanoparticles for optical temperature sensing

RSC Advances ◽  
2016 ◽  
Vol 6 (14) ◽  
pp. 11795-11801 ◽  
Author(s):  
Guicheng Jiang ◽  
Shaoshuai Zhou ◽  
Xiantao Wei ◽  
Yonghu Chen ◽  
Changkui Duan ◽  
...  
Keyword(s):  
Temperature Sensors ◽  
Temperature Sensing ◽  
Excitation Wavelength ◽  
Upconversion Nanoparticles ◽  
Core Shell

Nd3+ sensitized core–shell upconversion nanoparticles (UNCPs) are promising candidates for application in optical temperature sensors at a biocompatible excitation wavelength (794 nm).

Optical temperature sensing with minimized heating effect using core–shell upconversion nanoparticles

RSC Advances ◽  
2016 ◽  
Vol 6 (26) ◽  
pp. 21540-21545 ◽  
Author(s):  
Weibo Chen ◽  
Chengjian Shi ◽  
Taojunyu Tao ◽  
Meixi Ji ◽  
Shuhong Zheng ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Temperature Sensing ◽  
Upconversion Nanoparticles ◽  
Core Shell ◽  
Heating Effect ◽  
Temperature Range

Core–shell NaYF4:Yb3+, Tm3+@NaYF4:Yb3+, Nd3+ nanosystem for temperature sensing with a minimized heating effect, which demonstrates a high sensitivity of up to 1.55% K−1 at a temperature range between 313 and 553 K.

Engineering water-tolerant core/shell upconversion nanoparticles for optical temperature sensing

2017 ◽  
Vol 42 (13) ◽  
pp. 2451 ◽  
Author(s):  
Masfer H. Alkahtani ◽  
Carmen L. Gomes ◽  
Philip R. Hemmer
Keyword(s):  
Temperature Sensing ◽  
Upconversion Nanoparticles ◽  
Core Shell

Upconversion nanoparticle–Ag@C@Ag composite films for rapid temperature sensing

CrystEngComm ◽  
2021 ◽  
Author(s):  
Hu Huang ◽  
Lingqiong Wu ◽  
Shengbin Cheng ◽  
Xiaofeng Wu ◽  
Shiping Zhan ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Ag Nanoparticles ◽  
Response Rate ◽  
Composite Films ◽  
Temperature Sensing ◽  
Upconversion Nanoparticles ◽  
Rapid Temperature

The response rate of optical temperature sensing of upconversion nanoparticles is significantly improved by coupling with Ag@C@Ag nanoparticles which have excellent thermal conductivity.

Optical temperature sensing based on upconversion nanoparticles with enhanced sensitivity via dielectric superlensing modulation

2021 ◽  
Vol 56 (17) ◽  
pp. 10438-10448
Author(s):  
Mei Lin ◽  
Shengbin Cheng ◽  
Xiaofeng Wu ◽  
Shiping Zhan ◽  
Yunxin Liu
Keyword(s):  
Temperature Sensing ◽  
Upconversion Nanoparticles ◽  
Enhanced Sensitivity

scholarly journals A SERS Study of Charge Transfer Process in Au Nanorod–MBA@Cu2O Assemblies: Effect of Length to Diameter Ratio of Au Nanorods

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 867
Author(s):  
Lin Guo ◽  
Zhu Mao ◽  
Sila Jin ◽  
Lin Zhu ◽  
Junqi Zhao ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Shell Structure ◽  
Shell Structures ◽  
Core Shell ◽  
Absorption Bands ◽  
Au Nanorods ◽  
The Core ◽  
Band Position ◽  
Surface Enhanced Raman ◽  
Core Shell Structure

Surface-enhanced Raman scattering (SERS) is a powerful tool in charge transfer (CT) process research. By analyzing the relative intensity of the characteristic bands in the bridging molecules, one can obtain detailed information about the CT between two materials. Herein, we synthesized a series of Au nanorods (NRs) with different length-to-diameter ratios (L/Ds) and used these Au NRs to prepare a series of core–shell structures with the same Cu2O thicknesses to form Au NR–4-mercaptobenzoic acid (MBA)@Cu2O core–shell structures. Surface plasmon resonance (SPR) absorption bands were adjusted by tuning the L/Ds of Au NR cores in these assemblies. SERS spectra of the core-shell structure were obtained under 633 and 785 nm laser excitations, and on the basis of the differences in the relative band strengths of these SERS spectra detected with the as-synthesized assemblies, we calculated the CT degree of the core–shell structure. We explored whether the Cu2O conduction band and valence band position and the SPR absorption band position together affect the CT process in the core–shell structure. In this work, we found that the specific surface area of the Au NRs could influence the CT process in Au NR–MBA@Cu2O core–shell structures, which has rarely been discussed before.

Decoration of upconversion nanoparticles@mSiO2 core–shell nanostructures with CdS nanocrystals for excellent infrared light triggered photocatalysis

RSC Advances ◽  
2016 ◽  
Vol 6 (59) ◽  
pp. 54241-54248 ◽  
Author(s):  
Yao-Wu Li ◽  
Liang Dong ◽  
Chen-Xi Huang ◽  
Yan-Chuan Guo ◽  
Xian-Zhu Yang ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Photocatalytic Degradation ◽  
Infrared Light ◽  
Upconversion Nanoparticles ◽  
Core Shell ◽  
Cds Nanocrystals ◽  
Shell Nanostructures ◽  
Cds Nanostructures

Upconversion nanoparticles@mesoporous silica (mSiO2)/CdS nanostructures have been designed and fabricated for infrared light triggered photocatalytic degradation towards RhB dye.

Ultra-high sensitivity of rhodamine B sensing based on NaGdF4:Yb3+,Er3+@NaGdF4 core-shell upconversion nanoparticles

2019 ◽  
Vol 37 (4) ◽  
pp. 339-344 ◽  
Author(s):  
Hanping Xiong ◽  
Qiuhong Min ◽  
Hongqing Ma ◽  
Lei Zhao ◽  
Wenbo Chen ◽  
...  
Keyword(s):  
Rhodamine B ◽  
High Sensitivity ◽  
Upconversion Nanoparticles ◽  
Core Shell
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