A pyroelectric thermal sensor for automated ice nucleation detection

A pyroelectric thermal sensor for automated ice nucleation detection
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用于自动冰核检测的热释电热传感器

DOI:
10.5194/amt-2019-401
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发表时间:
2020
影响因子:
3.8
通讯作者:
W. Schwarzacher
W. Schwarzacher
中科院分区:
地球科学3区
文献类型:
--
作者:
Frederick P. Cook;R. Lord;G. Sitbon;Adam Stephens;A. Rust;W. Schwarzacher

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Abstract. A new approach to automating droplet freezing assays is demonstrated by comparing the ice-nucleating efficiency of a K-feldspar glass and a crystal with the same bulk composition. The method uses a pyroelectric polymer PVDF (polyvinylidene fluoride) as a thermal sensor. PVDF is highly sensitive, cheap, and readily available in a variety of sizes. As a droplet freezes latent heat is released, which is detected by the sensor. Each event is correlated with the temperature at which it occurred. The sensor has been used to detect microlitre volume droplets of water freezing, from which frozen proportion curves and nucleation rates can be quickly and automatically calculated. Our method shows glassy K-feldspar to be a poor nucleator compared to the crystalline form.
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