Accurate thermometry based on the red and green fluorescence intensity ratio in NaYF_4: Yb, Er nanocrystals for bioapplication

2016 ◽  
Vol 41 (20) ◽  
pp. 4664 ◽  
Author(s):  
Lixin Liu ◽  
Feng Qin ◽  
Tianquan Lv ◽  
Zhiguo Zhang ◽  
Wenwu Cao
Keyword(s):  
Fluorescence Intensity ◽  
Intensity Ratio ◽  
Fluorescence Intensity Ratio ◽  
Green Fluorescence

scholarly journals Influence of phase transitions on green fluorescence intensity ratio in Er^3+ doped K_05Na_05NbO_3 ceramic

2016 ◽  
Vol 24 (25) ◽  
pp. 29209 ◽  
Author(s):  
Zhang Liang ◽  
Enwei Sun ◽  
Shenghai Pei ◽  
Leipeng Li ◽  
Feng Qin ◽  
...  
Keyword(s):  
Phase Transitions ◽  
Fluorescence Intensity ◽  
Intensity Ratio ◽  
Fluorescence Intensity Ratio ◽  
Green Fluorescence

scholarly journals 1550nm Infrared Laser Heating NaYF4:Er3+ Nanoparticle In Isolated Pig Liver and Up-conversion Fluorescence Intensity Ratio Temperature Measurement

2021 ◽  
Vol 2112 (1) ◽  
pp. 012026
Author(s):  
Xinyu He ◽  
Songsong Liao ◽  
Zhuohong Feng ◽  
Wenqi Huang ◽  
Yantang Huang
Keyword(s):  
Fluorescence Intensity ◽  
Laser Heating ◽  
Intensity Ratio ◽  
Infrared Laser ◽  
Fluorescence Intensity Ratio ◽  
Green Fluorescence ◽  
Pig Liver ◽  
Tumor Hyperthermia ◽  
Heat Therapy ◽  
Important Means

Abstract Hyperthermia is an important means of cancer treatment which is called “tumor green therapy”. The clinical heat therapy heating sources include ultrasound, microwave, alternating magnetic field, infrared laser. However, it is still difficult to accurately measure the temperature of tumor hyperthermia and the dose of hyperthermia. Here, NaYF4:Er3+ nanoparticles were injected into a small part of isolated pig liver, and heated it with 1550nm infrared laser. At the same time, the laser excited the NaYF4:Er3+ nanoparticles to generate up-conversion green fluorescence. The fluorescence intensity ratio was used to measure the temperature of the heating part in real time.

Strain-independent temperature measurement by use of a fluorescence intensity ratio technique in optical fiber

2000 ◽  
Vol 39 (18) ◽  
pp. 3050 ◽  
Author(s):  
Scott A. Wade ◽  
Stephen F. Collins ◽  
Kenneth T. V. Grattan ◽  
Gregory W. Baxter
Keyword(s):  
Optical Fiber ◽  
Temperature Measurement ◽  
Fluorescence Intensity ◽  
Intensity Ratio ◽  
Fluorescence Intensity Ratio

scholarly journals Detecting Variable Resistance by Fluorescence Intensity Ratio Technology

Sensors ◽  
2019 ◽  
Vol 19 (10) ◽  
pp. 2400 ◽  
Author(s):  
Wanjun Sheng ◽  
Xiangfu Wang ◽  
Yong Tao ◽  
Xiaohong Yan
Keyword(s):  
Fluorescence Intensity ◽  
Intensity Ratio ◽  
Negative Temperature ◽  
Relative Sensitivity ◽  
New Method ◽  
Fluorescence Intensity Ratio ◽  
Time Intervals ◽  
Variable Resistance ◽  
Reduced Graphene ◽  
Short Time

We report a new method for detecting variable resistance during short time intervals by using an optical method. A novel variable-resistance sensor composed of up-conversion nanoparticles (NaYF4:Yb3+,Er3+) and reduced graphene oxide (RGO) is designed based on characteristics of a negative temperature coefficient (NTC) resistive element. The fluorescence intensity ratio (FIR) technology based on green and red emissions is used to detect variable resistance. Combining the Boltzmann distributing law with Steinhart–Hart equation, the FIR and relative sensitivity SR as a function of resistance can be defined. The maximum value of SR is 1.039 × 10−3/Ω. This work reports a new method for measuring variable resistance based on the experimental data from fluorescence spectrum.

Enhanced up-conversion and temperature-sensing behaviour of Er3+ and Yb3+ co-doped Y2Ti2O7 by incorporation of Li+ ions

2014 ◽  
Vol 16 (41) ◽  
pp. 22665-22676 ◽  
Author(s):  
B. P. Singh ◽  
A. K. Parchur ◽  
R. S. Ningthoujam ◽  
P. V. Ramakrishna ◽  
S. Singh ◽  
...  
Keyword(s):  
Fluorescence Intensity ◽  
Intensity Ratio ◽  
Graphical Representation ◽  
Temperature Sensing ◽  
Fluorescence Intensity Ratio ◽  
Sensing Applications ◽  
Co Doped

Graphical representation of Li+ co-doped Y2Ti2O7:Er3+/Yb3+ phosphor showing up-conversion of green and red bands and probing the fluorescence intensity ratio (FIR) for temperature sensing applications.

Sign in / Sign up

Export Citation Format

Share Document