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NI, S. BU, Y. ZHU, H. VASHCHENKO, V.V. SRIVASTAVA, A.K. NEUŽIL, P. YOBAS, L.
Original Title
A SUB-nL DIFFERENTIAL SCANNING CALORIMETRY CHIP FOR LIQUID CRYSTAL PHASE TRANSITION CHARACTERIZATION
Type
conference paper
Language
English
Original Abstract
This paper presents a sub-nL differential scanning calorimetry (DSC) chip for liquid crystal phase transition characterization. This is the first DSC chip capable of measuring a liquid sample at a sub-nL volume capacity. The chip achieves a heat-flow resolution of 6.29 nW, the highest among state-of-the-art demonstrations [1]. The chip features suspended twin membranes that house self-enclosed silicon nitride microchannels. The design realizes a low system heat capacitance of 2.3 mu J/K and thus minimizes the deformation in the DSC thermogram and the shift of transition temperature at an increased temperature scanning rate. Those distortions of the DSC measurement result have typically been observed at increased scanning rates for commercial DSC and other DSC chips. The compact chip comprises solid materials to facilitate measurement under low vacuum and offer superior sensitivity and low noise.
Keywords
Differential Scanning Calorimetry; Liquid Crystal; 4-Cyano-4 '-pentylbiphenyl; Enthalpy
Authors
NI, S.; BU, Y.; ZHU, H.; VASHCHENKO, V.V.; SRIVASTAVA, A.K.; NEUŽIL, P.; YOBAS, L.
Released
9. 1. 2022
ISBN
978-1-6654-0911-7
Book
Proceedings IEEE Micro Electro Mechanical Systems
Pages from
134
Pages to
137
Pages count
4
BibTex
@inproceedings{BUT182250, author="NI, S. and BU, Y. and ZHU, H. and VASHCHENKO, V.V. and SRIVASTAVA, A.K. and NEUŽIL, P. and YOBAS, L.", title="A SUB-nL DIFFERENTIAL SCANNING CALORIMETRY CHIP FOR LIQUID CRYSTAL PHASE TRANSITION CHARACTERIZATION", booktitle="Proceedings IEEE Micro Electro Mechanical Systems", year="2022", pages="134--137", isbn="978-1-6654-0911-7" }