1. A High Performance Impedance-based Platform for Evaporation Rate Detection
- Author
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Yung-Sheng Lin, Wei-Lung Chou, Chen Cheng-You, Pee-Yew Lee, and Yu-Hsin Lin
- Subjects
General Immunology and Microbiology ,Sample (material) ,General Chemical Engineering ,General Neuroscience ,010401 analytical chemistry ,Evaporation rate ,Evaporation ,02 engineering and technology ,Models, Theoretical ,021001 nanoscience & nanotechnology ,Chip ,01 natural sciences ,General Biochemistry, Genetics and Molecular Biology ,0104 chemical sciences ,Dielectric spectroscopy ,Indium tin oxide ,Engineering ,Volume (thermodynamics) ,Electric Impedance ,Hyaluronic Acid ,Volatilization ,0210 nano-technology ,Biological system ,Electrical impedance - Abstract
This paper describes the method of a novel impedance-based platform for the detection of the evaporation rate. The model compound hyaluronic acid was employed here for demonstration purposes. Multiple evaporation tests on the model compound as a humectant with various concentrations in solutions were conducted for comparison purposes. A conventional weight loss approach is known as the most straightforward, but time-consuming, measurement technique for evaporation rate detection. Yet, a clear disadvantage is that a large volume of sample is required and multiple sample tests cannot be conducted at the same time. For the first time in literature, an electrical impedance sensing chip is successfully applied to a real-time evaporation investigation in a time sharing, continuous and automatic manner. Moreover, as little as 0.5 ml of test samples is required in this impedance-based apparatus, and a large impedance variation is demonstrated among various dilute solutions. The proposed high-sensitivity and fast-response impedance sensing system is found to outperform a conventional weight loss approach in terms of evaporation rate detection.
- Published
- 2016