scholarly journals Temperature and Phase Transition Sensing in Liquids with Fluorescent Probes

MRS Advances ◽  
2017 ◽  
Vol 2 (44) ◽  
pp. 2391-2399 ◽  
Author(s):  
I. Shishkin ◽  
T. Alon ◽  
R. Dagan ◽  
P. Ginzburg
Keyword(s):  
Phase Transition ◽  
Time Use ◽  
Fluorescent Dyes ◽  
Local Environment ◽  
Phase Transition Point ◽  
Temperature Dependent ◽  
Solvent Interactions ◽  
Dependent Behavior ◽  
Highly Sensitive ◽  
Transition Points

ABSTRACTLocal environment of fluorescent dyes could strongly affects emission dynamics of the latter. In particular, both signal intensities and emission lifetimes are highly sensitive to solvent temperatures. Here, temperature-dependent behavior Rhodamine B fluorescence in water and ethanol solutions was experimentally investigated. Phase transition point between liquid water and ice was shown to have a dramatic impact on both in intensity (30-fold drop) and in lifetime (from 2.68 ns down to 0.13 ns) of the dye luminescence along with the shift of spectral maxima from 590 to 625 nm. At the same time, use of ethanol as solvent does not lead to any similar behavior. The reported results and approaches enable further investigations of dye-solvent interactions and studies of physical properties at phase transition points.

From structural phase transition to highly sensitive lifetime based luminescent thermometer: multifaceted modification of thermometric performance in Y0.9-xNdxYb0.1PO4 nanocrystals

2021 ◽  
Author(s):  
Kamila Maciejewska ◽  
Marcin Szalkowski ◽  
Artur Bednarkiewicz ◽  
Lukasz Marciniak
Keyword(s):  
Phase Transition ◽  
Structural Properties ◽  
Structural Phase Transition ◽  
Structural Phase ◽  
Deep Understanding ◽  
Luminescent Properties ◽  
Host Material ◽  
Temperature Dependent ◽  
Highly Sensitive

The development of highly sensitive luminescent thermometer requires deep understanding of the correlation between structural properties of the host material with temperature-dependent luminescent properties of lanthanide emitters embedded in these...

VARIATIONAL CALCULATION OF LATTICE SU(N) GAUGE SYSTEMS FOR N=4~6

1998 ◽  
Vol 13 (18) ◽  
pp. 3193-3202
Author(s):  
XITE ZHENG
Keyword(s):  
Phase Transition ◽  
Transition Point ◽  
Variational Calculation ◽  
Phase Transition Point ◽  
Lattice Gauge ◽  
Large N ◽  
Transition Points ◽  
Good Agreement ◽  
Gauge Systems

A variational calculation scheme of SU (N) lattice gauge Wilson models for large but finite N is presented. The order parameter EP and the phase transition points of lattice SU (N) gauge systems for N=4~6 are calculated. The results are in good agreement with Monte Carlo simulations. An extrapolation procedure for determination of the phase transition point in the large N limit is proposed.

scholarly journals Screening Study on Rheological Behavior and Phase Transition Point of Polymer-containing Fluids produced under the Oil Freezing Point Temperature

2019 ◽  
Vol 17 (1) ◽  
pp. 1442-1448
Author(s):  
Lingyue Zhu ◽  
Jing Dong ◽  
Wei Jiang ◽  
Dandan Yuan ◽  
Hong Jiang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Low Temperature ◽  
Water Content ◽  
Rheological Behavior ◽  
Transition Point ◽  
Freezing Point ◽  
Polymer Concentration ◽  
Phase Transition Point ◽  
Point Temperature ◽  
Transition Points

AbstractFor an increasing implementation of the low-temperature transportation in oilfield, it is urgent priority initially to study the physical and chemical properties to provide the vital technical support for the low-temperature transport of the polymer flooding. In this paper, the rheological behavior of polymer-containing fluid produced from the Daqing polymer flood were first studied for an adaptation of transportation under the oil’s freezing point temperature. The experiments progressed with different temperature, shear rate, water content and polymer concentration which have great impacts on the viscosity of the fluids produced aiming to find the phase transportation point for the application of the low-temperature transportation. It was displayed that a significant discontinuity in the viscosity occurs at some range of water content. Before the phase transition point, presented in W/O (water-in-oil) emulsion, the viscosity was lifted with the increase of the water content while after the phase transition point, forming the O/W (oil-in-water) type emulsion, the viscosity was dropped with an increase of water content. The phase transition points strongly depend on the polymer concentration in the fluids Produced. It was demonstrated that the phase transition points of polymer-containing fluids were 65%, 70%, 50%, 50% and 50%, corresponding to the polymer concentrations of 315mg/L, 503mg/L, 708mg/L, 920mg/L and 1053mg/L, respectively. The characteristics are attributed to the viscous polymer. The fluidity of the fluid produced was decreased with the increase of polymer concentration.

scholarly journals Tuning the composition of rare earth sesquioxides Gd2−xLaxO3:Eu3+ to control phase transitions at a high temperature to design new highly sensitive luminescence-based thermal sensors

RSC Advances ◽  
2016 ◽  
Vol 6 (60) ◽  
pp. 55298-55306 ◽  
Author(s):  
Guillaume Salek ◽  
Alexis Devoti ◽  
Alain Garcia ◽  
Manuel Gaudon ◽  
Veronique Jubera ◽  
...  
Keyword(s):  
Phase Transition ◽  
Rare Earth ◽  
Emission Spectroscopy ◽  
Optical Emission Spectroscopy ◽  
Optical Emission ◽  
Local Environment ◽  
Thermal Sensors ◽  
Control Phase ◽  
Highly Sensitive ◽  
Rare Earth Sesquioxides

Coupling Rietveld XRD data analysis with the optical emission spectroscopy to probe the local environment, gives a perfect view of the C → B phase transition and allows designing new highly sensitive thermal sensors at high temperatures.

Temperature-Dependent Solid-state Luminescence and Reversible Phase Transition of (n-Bu4N)[Au(SC6H3-3,5-Me2)2]

2003 ◽  
Vol 32 (11) ◽  
pp. 1002-1003 ◽  
Author(s):  
Seiji Watase ◽  
Takayuki Kitamura ◽  
Nobuko Kanehisa ◽  
Masami Nakamoto ◽  
Yasushi Kai ◽  
...  
Keyword(s):  
Phase Transition ◽  
Solid State ◽  
Temperature Dependent ◽  
Reversible Phase Transition ◽  
Reversible Phase ◽  
State Luminescence

scholarly journals Recent Advances in Quenchbody, a Fluorescent Immunosensor

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1223
Author(s):  
Jinhua Dong ◽  
Hiroshi Ueda
Keyword(s):  
Fluorescence Intensity ◽  
Fluorescent Dyes ◽  
Antibody Fragment ◽  
Disease Diagnosis ◽  
Disease Biomarkers ◽  
Highly Sensitive ◽  
Physiologically Active Substances ◽  
New Type ◽  
Antigen Antibody ◽  
Active Substances

The detection of viruses, disease biomarkers, physiologically active substances, drugs, and chemicals is of great significance in many areas of our lives. Immunodetection technology is based on the specificity and affinity of antigen–antibody reactions. Compared with other analytical methods such as liquid chromatography coupled with mass spectrometry, which requires a large and expensive instrument, immunodetection has the advantages of simplicity and good selectivity and is thus widely used in disease diagnosis and food/environmental monitoring. Quenchbody (Q-body), a new type of fluorescent immunosensor, is an antibody fragment labeled with fluorescent dyes. When the Q-body binds to its antigen, the fluorescence intensity increases. The detection of antigens by changes in fluorescence intensity is simple, easy to operate, and highly sensitive. This review comprehensively discusses the principle, construction, application, and current progress related to Q-bodies.

scholarly journals LCST polymers with UCST behavior

Soft Matter ◽  
2021 ◽  
Author(s):  
Marzieh Najafi ◽  
Mehdi Habibi ◽  
Remco Fokkink ◽  
Wim Hennink ◽  
Tina Vermonden
Keyword(s):  
Block Copolymers ◽  
Aqueous Solutions ◽  
Temperature Dependent ◽  
Dependent Behavior ◽  
Temperature Dependent Behavior

In this study, temperature dependent behavior of dense dispersions of core crosslinked flower-like micelles is investigated. Micelles were prepared by mixing aqueous solutions of two ABA block copolymers with PEG...

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