Smart Fluorescent Nanoparticles in Water Showing Temperature-Dependent Ratiometric Fluorescence Color Change

2017 ◽  
Vol 9 (3) ◽  
pp. 2883-2890 ◽  
Author(s):  
Junjie Cui ◽  
Ji Eon Kwon ◽  
Hyeong-Ju Kim ◽  
Dong Ryeol Whang ◽  
Soo Young Park
Keyword(s):  
Color Change ◽  
Fluorescent Nanoparticles ◽  
Ratiometric Fluorescence ◽  
Temperature Dependent ◽  
Fluorescence Color

Ultra‐pH‐Sensitive Small Molecule Probe Showing a Ratiometric Fluorescence Color Change

ChemPhotoChem ◽  
2020 ◽  
Vol 4 (6) ◽  
pp. 393-397 ◽  
Author(s):  
Junjie Cui ◽  
Gayoung Kim ◽  
Sehoon Kim ◽  
Ji Eon Kwon ◽  
Soo Young Park
Keyword(s):  
Small Molecule ◽  
Color Change ◽  
Ph Sensitive ◽  
Ratiometric Fluorescence ◽  
Fluorescence Color ◽  
Small Molecule Probe

Graphene oxide supported gold nanoclusters for the sensitive and selective detection of nitrite ions

The Analyst ◽  
2015 ◽  
Vol 140 (5) ◽  
pp. 1678-1685 ◽  
Author(s):  
Hongda Xu ◽  
Houjuan Zhu ◽  
Mingtai Sun ◽  
Huan Yu ◽  
Huihui Li ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Color Change ◽  
Gold Nanoclusters ◽  
Selective Detection ◽  
Ratiometric Fluorescence ◽  
Graphene Oxide Sheet ◽  
Fluorescence Color ◽  
Supported Gold

Nitrite selectively reacts to red fluorescent gold nanoclusters supported on blue fluorescent graphene oxide sheet and leads to a ratiometric fluorescence color change.

Fluorescence Color Change of a Boron-Substituted Diarylazomethine by Reaction with a Cyanide Ion

2010 ◽  
Vol 83 (10) ◽  
pp. 1185-1187 ◽  
Author(s):  
Junro Yoshino ◽  
Naokazu Kano ◽  
Takayuki Kawashima
Keyword(s):  
Color Change ◽  
Cyanide Ion ◽  
Fluorescence Color

Fluorescence Color Change of Aggregation-Induced Emission of 4-[Bis(4-methylphenyl)amino]benzaldehyde

ChemPhysChem ◽  
2013 ◽  
Vol 14 (17) ◽  
pp. 3898-3901 ◽  
Author(s):  
Motoki Kurita ◽  
Mika Momma ◽  
Kei Mizuguchi ◽  
Hideyuki Nakano
Keyword(s):  
Color Change ◽  
Aggregation Induced Emission ◽  
Fluorescence Color

Temperature-Dependent Color Change in Kenyan Chameleons

1993 ◽  
Vol 66 (2) ◽  
pp. 270-287 ◽  
Author(s):  
B. Michael Walton ◽  
Albert F. Bennett
Keyword(s):  
Color Change ◽  
Temperature Dependent

scholarly journals Mathematical Evaluation of Prediction Accuracy for Food Quality by Time Temperature Integrator of Intelligent Food Packaging through Virtual Experiments

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Soo Dong Shim ◽  
Seung Won Jung ◽  
Seung Ju Lee
Keyword(s):  
Kinetic Models ◽  
Prediction Accuracy ◽  
Food Packaging ◽  
Microbial Growth ◽  
Color Change ◽  
Temperature Dependent ◽  
Virtual Experiments ◽  
Mathematical Evaluation ◽  
Time Temperature Integrator

Prediction of the quality of packaged foods using a colorimetric time temperature integrator (TTI) is affected by the types of kinetic models for the TTIs and the associated food qualities. Several types of kinetic models were applied for the TTI color change (four types) and food microbial growth (three types). To evaluate the prediction, a virtual experiment data of the food microbial growth were mathematically created by using the relevant kinetic models. In addition to the kinetic models, two types of temperature-dependent models (Arrhenius and square root models) were used in the calculation. Among the four types of TTIs, M2-3510 or S type forPseudomonasspp. and M type forListeria monocytogenesandEscherichia colishowed the least erroneous results. Overall, a suitable TTI could be selected for each food microorganism, based on the prediction accuracy.

A confined carbon dot-based self-calibrated fluorescence probe for visible and high-sensitivity moisture readouts

2021 ◽  
Author(s):  
Zhong-Zheng Ding ◽  
Guang-Song Zheng ◽  
Qing Lou ◽  
Jiang-Fan Han ◽  
Meng-Yuan Wu ◽  
...  
Keyword(s):  
High Performance ◽  
Potential Role ◽  
Fluorescence Probe ◽  
Color Change ◽  
High Sensitivity ◽  
Confinement Effect ◽  
Detection Range ◽  
Fluorescence Color ◽  
Highly Sensitive ◽  
New Type

Abstract Excellent luminescent materials are essential for high-performance fluorescent nanosensors. Here, a new-type self-calibrated humidity sensor has been established through monitoring the fluorescent color change of carbon dots (CDs) confined in sodium hydroxide (CDs@NaOH). The CDs are prepared by a facile and rapid microwave assisted heating method using citric acid, urea, and NaOH as precursors. The confinement effect from NaOH has reduced the nonradiative transition and suppressed the aggregation-induced quenching of the CDs in solid. Compared with other sensors based on CD fluorescent visualization, the sensor has good linearity and wide humidity detection range from 6.9% to 95.4%. With the increased relative humidity, the fluorescence color of the sensor change from green to blue. The proposed sensing mechanism is due to the breaking and reforming of hydrogen bonds and proton transfer occurring at the CD-NaOH matrix interfaces. This finding suggests a potential role for the spatial confinement effect and may provide an avenue for developing highly sensitive humidity readouts.

Phosphor Thermometry by Using Rare Earth-Doped Yttrium Oxides

2011 ◽  
Author(s):  
Naohiro Ishiwada ◽  
Satoko Fujioka ◽  
Toshihisa Ueda ◽  
Takeshi Yokomori
Keyword(s):  
Intensity Ratio ◽  
Color Change ◽  
Thermal Quenching ◽  
Ratio Method ◽  
Temperature Dependent ◽  
Phosphor Material ◽  
Emission Color ◽  
Phosphor Thermometry ◽  
Increasing Temperature ◽  
Rare Earth Doped

The development of new temperature-dependent phosphor particles for high temperature thermometry is presented. To develop the phosphor material that can be applied to the intensity ratio method, the photoluminescence of Y2O3:Tb,Tm was investigated with elevating temperature. As a result, Y2O3:Tb,Tm phosphor shows that the peak intensity at 456 nm is still strong at more than 1100 K whereas the other peak intensities decrease due to the thermal quenching. Thus, the intensity ratio I543nm/I456nm has a high gradient and linearity over a wide temperature range, and it is confirmed that Y2O3:Tb,Tm provides a higher resolution in temperature measurement than Y2O3:Tb and Y2O3:Tm. Also, since this phosphor changes its emission color from green to blue with increasing temperature, it is possible to measure temperature not only by analyzing the intensity ratio but also by observing the color change in appearance. It can, therefore, be expected to use as a Visual Thermo-Sensor (VTS).

Temperature-Dependent Ratiometric Fluorescence from an Organic Aggregates System

2006 ◽  
Vol 110 (29) ◽  
pp. 9079-9083 ◽  
Author(s):  
Jie Huang ◽  
Aidong Peng ◽  
Hongbing Fu ◽  
Ying Ma ◽  
Tianyou Zhai ◽  
...  
Keyword(s):  
Ratiometric Fluorescence ◽  
Temperature Dependent
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