Development of a Temperature Sensor Using Spin-Crossover Fe(pyrazine)[Pt(CN)4I] Nanoparticles

Yunji Eom; Keonmok Kim; Hyeon Jun Lee; Sri Ramulu Torati; Cheolgi Kim

doi:10.1109/LMAG.2022.3189274

Development of a Temperature Sensor Using Spin-Crossover Fe(pyrazine)[Pt(CN)₄I] Nanoparticles

Yunji Eom, Keonmok Kim, Hyeon Jun Lee, Sri Ramulu Torati, Cheolgi Kim

Daegu Gyeongbuk Institute of Science and Technology

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

Device miniaturization requires temperature sensors with high resolution and precise calibration for measurements at reduced scale. We developed an optical temperature sensor using Fe2+ spin-crossover (SCO) material that has low and high spin states depending on temperature. We adjusted the operating range of the SCO (295-365 K) with an appropriate concentration of iodine. The color induced by temperature change was observed with a microscope and was converted to the color intensity represented in grayscale. To test the material, we covered the surface of a gold microheater with a layer of Fe(pyrazine)[Pt(CN)4I] SCO nanoparticles and compared optically measured temperatures with those from a conventional temperature sensor. We conclude that the thermochromic temperature sensor is suitable for measuring temperature changes in microdevices, even in ambient light.

Original language	English
Article number	3504405
Journal	IEEE Magnetics Letters
Volume	13
DOIs	https://doi.org/10.1109/LMAG.2022.3189274
State	Published - 2022

Bibliographical note

Publisher Copyright:
© 2010-2012 IEEE.

Keywords

Magnetochemistry
microthermometer
molecular magnet
spin crossover
thermochromism

Access to Document

10.1109/LMAG.2022.3189274

Cite this

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title = "Development of a Temperature Sensor Using Spin-Crossover Fe(pyrazine)[Pt(CN)4I] Nanoparticles",

abstract = "Device miniaturization requires temperature sensors with high resolution and precise calibration for measurements at reduced scale. We developed an optical temperature sensor using Fe2+ spin-crossover (SCO) material that has low and high spin states depending on temperature. We adjusted the operating range of the SCO (295-365 K) with an appropriate concentration of iodine. The color induced by temperature change was observed with a microscope and was converted to the color intensity represented in grayscale. To test the material, we covered the surface of a gold microheater with a layer of Fe(pyrazine)[Pt(CN)4I] SCO nanoparticles and compared optically measured temperatures with those from a conventional temperature sensor. We conclude that the thermochromic temperature sensor is suitable for measuring temperature changes in microdevices, even in ambient light.",

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author = "Yunji Eom and Keonmok Kim and Lee, {Hyeon Jun} and Torati, {Sri Ramulu} and Cheolgi Kim",

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AU - Torati, Sri Ramulu

AU - Kim, Cheolgi

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AB - Device miniaturization requires temperature sensors with high resolution and precise calibration for measurements at reduced scale. We developed an optical temperature sensor using Fe2+ spin-crossover (SCO) material that has low and high spin states depending on temperature. We adjusted the operating range of the SCO (295-365 K) with an appropriate concentration of iodine. The color induced by temperature change was observed with a microscope and was converted to the color intensity represented in grayscale. To test the material, we covered the surface of a gold microheater with a layer of Fe(pyrazine)[Pt(CN)4I] SCO nanoparticles and compared optically measured temperatures with those from a conventional temperature sensor. We conclude that the thermochromic temperature sensor is suitable for measuring temperature changes in microdevices, even in ambient light.

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