Modeling Stratum Corneum Swelling for the Optimization of Electrode-Based Skin Hydration Sensors

被引:1
作者
Malnati, Claudio [1 ]
Fehr, Daniel [1 ]
Spano, Fabrizio [1 ]
Bonmarin, Mathias [1 ]
机构
[1] Zurich Univ Appl Sci, Sch Engn, Inst Computat Phys, ZHAW, CH-8400 Winterthur, Switzerland
关键词
skin model; skin hydration; dielectric spectroscopy; stratum corneum; DIELECTRIC ANALYSIS; IN-VIVO; DYNAMICS;
D O I
10.3390/s21123986
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
We present a novel computational model of the human skin designed to investigate dielectric spectroscopy electrodes for stratum corneum hydration monitoring. The multilayer skin model allows for the swelling of the stratum corneum, as well as the variations of the dielectric properties under several hydration levels. According to the results, the stratum corneum thickness variations should not be neglected. For high hydration levels, swelling reduces the skin capacitance in comparison to a fixed stratum corneum thickness model. In addition, different fringing-field electrodes are evaluated in terms of sensitivity to the stratum corneum hydration level. As expected, both conductance and capacitance types of electrodes are influenced by the electrode geometry and dimension. However, the sensitivity of the conductance electrodes is more affected by dimension changes than the capacitance electrode leading to potential design optimization.
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页数:15
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