Dual-mode optical thermometry based on Bi3+/Eu3+ co-activated BaGd2O4 phosphor with high sensitivity and signal discriminability

2021 ◽  
Author(s):  
Jie Fu ◽  
Fuwen Liu ◽  
Liuyan Zhou ◽  
Renguang Ye ◽  
Degang Deng ◽  
...  
Keyword(s):  
High Sensitivity ◽  
Dual Mode ◽  
Optical Thermometry

A high-sensitivity dual-mode optical thermometry based on one-step synthesis of Mn2+:BaAl12O19–Mn4+:SrAl12O19 solid solution phosphors

2021 ◽  
Vol 853 ◽  
pp. 157262
Author(s):  
Yanting Zhu ◽  
Chenxia Li ◽  
Degang Deng ◽  
Bowen Chen ◽  
Hua Yu ◽  
...  
Keyword(s):  
Solid Solution ◽  
High Sensitivity ◽  
Dual Mode ◽  
Optical Thermometry ◽  
One Step

High-sensitivity and wide-temperature-range dual-mode optical thermometry under dual-wavelength excitation in novel double perovskite tellurate oxide

2021 ◽  
Author(s):  
Zhaojie Wu ◽  
Li Li ◽  
Guang Tian ◽  
Yongjie Wang ◽  
Faling Ling ◽  
...  
Keyword(s):  
Solid State ◽  
Wide Temperature Range ◽  
Solid State Reaction ◽  
Double Perovskite ◽  
High Sensitivity ◽  
Dual Wavelength ◽  
Dual Mode ◽  
Temperature Range ◽  
Optical Thermometry

Novel double perovskite SrLaLiTeO6 (abbreviated as SLLT): Mn4+, Dy3+ phosphors synthesized by solid-state reaction strategy exhibits distinct dual-emitting of Mn4+ and Dy3+. High-sensitivity and wide-temperature-range dual-mode optical thermometry was exploited...

Synthesis of ZrO2: Pr3+, Gd3+ nanocrystals for optical thermometry with thermal sensitivity above 2.32% K-1 over 270 K of sensing range

2021 ◽  
Author(s):  
Minghui Li ◽  
Jun Zhou ◽  
Ruoshan Lei ◽  
Huanping Wang ◽  
Feifei Huang ◽  
...  
Keyword(s):  
Thermal Sensitivity ◽  
High Sensitivity ◽  
Sensing Range ◽  
Optical Thermometry ◽  
Co Doped

Nowadays, there is an enthusiastic effort to develop the luminescent thermometers used for remote and high-sensitivity temperature readout over a wide sensing range. Herein, the Pr3+ and Gd3+ co-doped ZrO2...

Broadening the valid temperature range of optical thermometry through dual-mode design

2018 ◽  
Vol 6 (41) ◽  
pp. 11178-11183 ◽  
Author(s):  
Yan Gao ◽  
Yao Cheng ◽  
Tao Hu ◽  
Zeliang Ji ◽  
Hang Lin ◽  
...  
Keyword(s):  
Dual Mode ◽  
Temperature Range ◽  
Mode Design ◽  
Optical Thermometry ◽  
Highly Sensitive ◽  
Wide Range ◽  
Optical Thermometer

This study highlights a highly sensitive dual-mode optical thermometer Pr3+:Gd2ZnTiO6 for thermal readings over a wide range of temperature.

scholarly journals Tetraphenylethylene-conjugated polycation covered iron oxide nanoparticles for magnetic resonance/optical dual-mode imaging

2021 ◽  
Vol 8 (3) ◽  
Author(s):  
Li Yang ◽  
Shengxiang Fu ◽  
Li Liu ◽  
Zhongyuan Cai ◽  
Chunchao Xia ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Magnetic Resonance ◽  
Superparamagnetic Iron Oxide ◽  
High Sensitivity ◽  
Dual Mode ◽  
Grafting Ratio ◽  
High Fluorescence Intensity ◽  
Alkane Chain ◽  
High Fluorescence ◽  
Intramolecular Rotation

Abstract Magnetic resonance (MR)/optical dual-mode imaging with high sensitivity and high tissue resolution have attracted many attentions in biomedical applications. To avert aggregation-caused quenching of conventional fluorescence chromophores, an aggregation-induced emission molecule tetraphenylethylene (TPE)-conjugated amphiphilic polyethylenimine (PEI) covered superparamagnetic iron oxide (Alkyl-PEI-LAC-TPE/SPIO nanocomposites) was prepared as an MR/optical dual-mode probe. Alkyl-PEI-LAC-TPE/SPIO nanocomposites exhibited good fluorescence property and presented higher T2 relaxivity (352 Fe mM−1s−1) than a commercial contrast agent Feridex (120 Fe mM−1s−1) at 1.5 T. The alkylation degree of Alkyl-PEI-LAC-TPE effects the restriction of intramolecular rotation process of TPE. Reducing alkane chain grafting ratio aggravated the stack of TPE, increasing the fluorescence lifetime of Alkyl-PEI-LAC-TPE/SPIO nanocomposites. Alkyl-PEI-LAC-TPE/SPIO nanocomposites can effectively labelled HeLa cells and resulted in high fluorescence intensity and excellent MR imaging sensitivity. As an MR/optical imaging probe, Alkyl-PEI-LAC-TPE/SPIO nanocomposites may be used in biomedical imaging for certain applications.

Dual-mode optical thermometry based on Bi3+/Sm3+ co-activated BaGd2O4 phosphor with tunable sensitivity

2021 ◽  
pp. 163034
Author(s):  
Jie Fu ◽  
Liuyan Zhou ◽  
Yanling Chen ◽  
Jianhua Lin ◽  
Renguang Ye ◽  
...  
Keyword(s):  
Dual Mode ◽  
Optical Thermometry

scholarly journals SETI: The Microwave Search Problem and the Nasa Sky Survey Approach

1985 ◽  
Vol 112 ◽  
pp. 397-403
Author(s):  
Michael J. Klein ◽  
Samuel Gulkis
Keyword(s):  
Search Strategy ◽  
High Sensitivity ◽  
Search Problem ◽  
Dual Mode ◽  
Ongoing Work ◽  
Sky Survey ◽  
Frequency Coverage ◽  
Complementary Nature ◽  
Low Sensitivity ◽  
Survey Approach

NASA's microwave observing program for SETI is presented. This strategy is composed of a high sensitivity, narrow frequency coverage, Target Search and a low sensitivity, broad frequency coverage, Sky Survey. The complementary nature of this dual mode search strategy is discussed. An overview is given of ongoing work in the development of the search strategy for the Sky Survey.

scholarly journals A 920-MHz Dual-Mode Receiver with Energy Harvesting for UHF RFID Tag and IoT

Electronics ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 1042
Author(s):  
Peiqing Han ◽  
Zhaofeng Zhang ◽  
Yajun Xia ◽  
Niansong Mei
Keyword(s):  
Energy Harvesting ◽  
Low Power ◽  
Radio Frequency Identification ◽  
Supply Voltage ◽  
High Sensitivity ◽  
Cmos Process ◽  
Uhf Rfid ◽  
Dual Mode ◽  
Operating Modes ◽  
On Chip

A low-power dual-mode receiver is presented for ultra-high-frequency (UHF) radio frequency identification (RFID) systems. The reconfigurable architecture of the tag is proposed to be compatible with low-power and high-sensitivity operating modes. The read range of RFID system and the lifetime of the tag are increased by photovoltaic, thermoelectric and RF energy-harvesting topology. The receiver is implemented in a 0.18-μm standard CMOS process and occupies an active area of 0.65 mm × 0.7 mm. For low-power mode, the tag is powered by the rectifier and the sensitivity is −18 dBm. For high-sensitivity mode, the maximum PCE of the fully on-chip energy harvester is 46.5% with over 1-μW output power and the sensitivity is −40 dBm with 880 nW power consumption under the supply voltage of 0.8 V.

scholarly journals A new generation of dual-mode optical thermometry based on ZrO2:Eu3+ nanocrystals

Nanophotonics ◽  
2019 ◽  
Vol 8 (12) ◽  
pp. 2347-2358 ◽  
Author(s):  
Jun Zhou ◽  
Ruoshan Lei ◽  
Huanping Wang ◽  
Youjie Hua ◽  
Denghao Li ◽  
...  
Keyword(s):  
High Performance ◽  
Temperature Sensitive ◽  
Nonradiative Relaxation ◽  
Temperature Dependent ◽  
Dual Mode ◽  
Optical Thermometry ◽  
New Type ◽  
Optical Thermometer ◽  
New Generation ◽  
Sensing Sensitivity

AbstractFor achieving well-performing optical thermometry, a new type of dual-mode optical thermometer is explored based on the valley-to-peak ratio (VPR) and fluorescence lifetime of Eu3+ emissions in the ZrO2:Eu3+ nanocrystals with sizes down to 10 nm. In the VPR strategy, the intensity ratio between the valley (600 nm) generated by the emission band overlap and the 606 nm peak (5D0→7F2), which is highly temperature sensitive, is employed, giving the maximum relative sensing sensitivity (Sr) of 1.8% K−1 at 293 K and good anti-interference performance. Meanwhile, the 606 nm emission exhibits a temperature-dependent decay lifetime with the highest Sr of 0.33% K−1 at 573 K, which is due to the promoted nonradiative relaxation with temperature. These results provide useful information for constructing high-performance dual-mode optical thermometers, which may further stimulate the development of photosensitive nanomaterials for frontier applications.

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