scholarly journals From quencher to potent activator – Multimodal luminescence thermometry with Fe3+ in the oxides MAl4O7 (M = Ca, Sr, Ba)

2021 ◽  
Author(s):  
Karolina Kniec ◽  
Wojciech Piotrowski ◽  
Karolina A Ledwa ◽  
Markus Suta ◽  
Luis Antonio Dias Carlos ◽  
...  
Keyword(s):  
Thermal Imaging ◽  
Temperature Sensing ◽  
Luminescence Thermometry

Luminescence (nano)thermometry is an emerging and promising field for remote temperature sensing and thermal imaging of both the surface and interior of objects. While the field is dominated by trivalent...

scholarly journals Two-photon luminescence thermometry: towards 3D high-resolution thermal imaging of waveguides

2016 ◽  
Vol 24 (14) ◽  
pp. 16156 ◽  
Author(s):  
Ruiyun He ◽  
Javier Rodríguez Vázquez de Aldana ◽  
Ginés Lifante Pedrola ◽  
Feng Chen ◽  
Daniel Jaque
Keyword(s):  
High Resolution ◽  
Thermal Imaging ◽  
Two Photon ◽  
Luminescence Thermometry

scholarly journals One ion to catch them all: Targeted high-precision Boltzmann thermometry over a wide temperature range with Gd3+

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Dechao Yu ◽  
Huaiyong Li ◽  
Dawei Zhang ◽  
Qinyuan Zhang ◽  
Andries Meijerink ◽  
...  
Keyword(s):  
Wide Temperature Range ◽  
Thermal Sensitivity ◽  
Energy Levels ◽  
Relative Sensitivity ◽  
Black Body ◽  
Temperature Sensing ◽  
Lanthanide Ions ◽  
Visible Range ◽  
Temperature Range ◽  
Luminescence Thermometry

AbstractRatiometric luminescence thermometry with trivalent lanthanide ions and their 4fn energy levels is an emerging technique for non-invasive remote temperature sensing with high spatial and temporal resolution. Conventional ratiometric luminescence thermometry often relies on thermal coupling between two closely lying energy levels governed by Boltzmann’s law. Despite its simplicity, Boltzmann thermometry with two excited levels allows precise temperature sensing, but only within a limited temperature range. While low temperatures slow down the nonradiative transitions required to generate a measurable population in the higher excitation level, temperatures that are too high favour equalized populations of the two excited levels, at the expense of low relative thermal sensitivity. In this work, we extend the concept of Boltzmann thermometry to more than two excited levels and provide quantitative guidelines that link the choice of energy gaps between multiple excited states to the performance in different temperature windows. By this approach, it is possible to retain the high relative sensitivity and precision of the temperature measurement over a wide temperature range within the same system. We demonstrate this concept using YAl3(BO3)4 (YAB):Pr3+, Gd3+ with an excited 6PJ crystal field and spin-orbit split levels of Gd3+ in the UV range to avoid a thermal black body background even at the highest temperatures. This phosphor is easily excitable with inexpensive and powerful blue LEDs at 450 nm. Zero-background luminescence thermometry is realized by using blue-to-UV energy transfer upconversion with the Pr3+−Gd3+ couple upon excitation in the visible range. This method allows us to cover a temperature window between 30 and 800 K.

scholarly journals An investigation of temperature-sensing textiles for temperature monitoring during sub-maximal cycling trials

2020 ◽  
pp. 004051752093814
Author(s):  
Theodore Hughes-Riley ◽  
Philippa Jobling ◽  
Tilak Dias ◽  
Steve H Faulkner
Keyword(s):  
Boundary Conditions ◽  
Skin Temperature ◽  
Human Skin ◽  
Health Monitoring ◽  
Thermal Imaging ◽  
Temperature Sensing ◽  
Electronic Textiles ◽  
Saline Solutions ◽  
Two Temperature ◽  
Cycling Temperature

Temperature-sensing textiles have been proposed for a variety of applications, including health monitoring and sports. Skin temperature ( Tsk) measurements are an important parameter in performance sports and can be used to better understand thermoregulation during exercise. Currently, most Tsk measurements are taken using skin-mounted thermistors, which can be uncomfortable to the wearer, or thermal imaging, which can be difficult to implement and analyze. This work investigates the feasibility of using textile temperature-sensing electronic yarns (E-yarns) to measure human skin temperature during sub-maximal cycling trials. E-yarns were attached to commercially available cycling suits and measurements were recorded using both the E-yarns and the skin-mounted thermistors at rest and during sub-maximal cycling. Temperature readings were compared between the two temperature-sensing methodologies to determine the viability of using the temperature-sensing E-yarns for this application. Differences in the Tsk measurements as high as 5.9℃ between the E-yarns and skin-mounted thermistors for participants at rest have been shown. This work has also identified that a build-up of sweat significantly altered the Tsk recorded by the E-yarns in some cases. Further experiments explored the effect of saline solutions (simulating sweat) on the response of the temperature-sensing E-yarns. This work has highlighted boundary conditions for taking point Tsk measurement using electronic textiles.

Temperature sensing from the emission rise times of Eu3+ in SrY2O4

2014 ◽  
Vol 16 (46) ◽  
pp. 25636-25641 ◽  
Author(s):  
V. Lojpur ◽  
Ž. Antić ◽  
M. D. Dramićanin
Keyword(s):  
Rise Time ◽  
Temperature Sensing ◽  
Temperature Range ◽  
Luminescence Thermometry

The emission rise time of Eu3+-doped SrY2O4 was investigated in the temperature range of 20–200 °C for application in luminescence thermometry.

Luminescence lifetime thermometry with Mn3+–Mn4+ co-doped nanocrystals

2018 ◽  
Vol 6 (26) ◽  
pp. 7092-7100 ◽  
Author(s):  
L. Marciniak ◽  
K. Trejgis
Keyword(s):  
Temperature Sensing ◽  
Luminescence Lifetime ◽  
Co Doped ◽  
Luminescence Thermometry

Luminescence thermometry is one of the most promising techniques of temperature sensing which provides fast and accurate readout in the non-contact regime.

Remote Investigation of Buildings' Heat Losses by Thermal Imaging Technique

2009 ◽  
Vol 5 (1) ◽  
pp. 31-35
Author(s):  
F.F. Sizov ◽  
◽  
V.V. Zabudsky ◽  
A.G. Golenkov ◽  
S.L. Kravchenko ◽  
...  
Keyword(s):  
Thermal Imaging ◽  
Imaging Technique ◽  
Heat Losses

Far-Infrared Fresnel Lens for Thermal Imaging

2013 ◽  
Vol 133 (7) ◽  
pp. 274-279
Author(s):  
Tomoyuki Takahata ◽  
Kiyoshi Matsumoto ◽  
Isao Shimoyama
Keyword(s):  
Thermal Imaging ◽  
Far Infrared ◽  
Fresnel Lens

A New Scanning Thermal Microprobe

1997 ◽  
Vol 503 ◽  
Author(s):  
Yongxia Zhang ◽  
Yanwei Zhang ◽  
Juliana Blaser ◽  
T. S. Sriiram ◽  
R. B. Marcus
Keyword(s):  
Thin Film ◽  
High Resolution ◽  
Thermal Response ◽  
Temperature Sensing ◽  
Thermal Sensor ◽  
Atomic Force ◽  
Thin Film Thermocouple ◽  
Processing Steps ◽  
Thermocouple Junction

ABSTRACTA thermal microprobe has been designed and built for high resolution temperature sensing. The thermal sensor is a thin-film thermocouple junction at the tip of an Atomic Force Microprobe (AFM) silicon probe needle. Only wafer-stage processing steps are used for the fabrication. The thermal response over the range 25–s 4.5–rovolts per degree C and is linear.

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