Name: a high performance impedance-based platform for evaporation rate detection
Uploaded: 2016-10-17T15:00:00
Description: Watch this Scientific Journal Video about A High Performance Impedance-based Platform for Evaporation Rate Detection at JoVE.com

This work was sponsored by the Ministry of Science and Technology, Taiwan, under grant numbers MOST 104-2221-E-241-001-MY3 and MOST 105-2627-B-005-002.

1. Experimental Chip Module
<ol>
	<li>Fabricate the indium tin oxide (ITO) electrode chip by photolithography and chemical wet etching processes
	<ol>
		<li>Obtain an ITO substrate (370 mm x 480 mm x 0.5 mm (L x W x H)) with a 2,600 &#197; ITO layer commercially (See Materials List). Slice the ITO substrate to the dimensions of 90 mm x 90 mm x 0.5 mm with a glass cutter for the ITO electrode patterning process in a 4 inch aligner.</li>
		<li>Use an ultrasonic cleaner to clean the ITO glass with acetone...

<ol>
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Acta. 184, 233-238 (2015).</li><li>Olejnik, A., Goscianska, J., Zielinska, A., Nowak, I. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Stability+determination+of+the+formulations+containing+hyaluronic+acid.">Stability determination of the formulations containing hyaluronic acid.</a> Int. J. Cosmetic Sci. 37, 401-407 (2015).</li><li>Marcellin, E., Steen, J. A., Nielsen, L. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Insight+into+hyaluronic+acid+molecular+weight+control.">Insight into hyaluronic acid molecular weight control.</a> Appl. Microbiol. Biotechnol. 98, 6947-6956 (2014).</li><li>Laurent, T. C., Laurent, U. B. G., Fraser, J. R. E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=The+structure+and+function+of+hyaluronan:+An+overview.">The structure and function of hyaluronan: An overview.</a> Immunol. Cell Biol. 74 (2), A1-A7 (1996).</li><li>Papakonstantinou, E., Roth, M., Karakiulakis, G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Hyaluronic+acid:+A+key+molecule+in+skin+aging.">Hyaluronic acid: A key molecule in skin aging.</a> Derm.-Endocrinol. 4 (3), 253-258 (2012).</li><li>Sze, J. H., Brownlie, J. C., Love, C. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Biotechnological+production+of+hyaluronic+acid:+A+mini+review.">Biotechnological production of hyaluronic acid: A mini review.</a> 3 Biotech. 6, 67 (2016).</li><li>Lin, C. Y., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Real-time+detection+of+&#946;1+integrin+expression+on+MG-63+cells+using+electrochemical+impedance+spectroscopy.">Real-time detection of &#946;1 integrin expression on MG-63 cells using electrochemical impedance spectroscopy.</a> Biosens. Bioelectron. 28 (1), 221-226 (2011).</li><li>Hsiao, S. Y., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Chemical-free+and+reusable+cellular+analysis:+Electrochemical+impedance+spectroscopy+with+a+transparent+ITO+culture+chip.">Chemical-free and reusable cellular analysis: Electrochemical impedance spectroscopy with a transparent ITO culture chip.</a> Int. J. Technol. Hum. Interact. 8 (3), 1-9 (2012).</li><li>Lin, Y. S., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+real-time+impedance-sensing+chip+for+the+detection+of+emulsion+phase+separation.">A real-time impedance-sensing chip for the detection of emulsion phase separation.</a> Electrophoresis. 34 (12), 1743-1748 (2013).</li><li>Lin, Y. S., Chen, C. Y. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+novel+evaporation+detection+system+using+an+impedance+sensing+chip.">A novel evaporation detection system using an impedance sensing chip.</a> Analyst. 139 (22), 5781-5784 (2014).</li><li>Tseng, S. F., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Graphene-based+chips+fabricated+by+ultraviolet+laser+patterning+for+anelectrochemical+impedance+spectroscopy.">Graphene-based chips fabricated by ultraviolet laser patterning for anelectrochemical impedance spectroscopy.</a> Sens. Actuator B-Chem. 226, 342-348 (2016).</li><li>Pavicic, T., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Efficacy+of+cream-based+novel+formulations+of+hyaluronic+acid+of+different+molecular+weights+in+anti-wrinkle+treatment.">Efficacy of cream-based novel formulations of hyaluronic acid of different molecular weights in anti-wrinkle treatment.</a> J. 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The critical step for evaporation measurement in this impedance-based detection is the preparation of the tested solutions. Deionized water cannot be used due to its enormous impedance. Instead, tap water containing conductive ions was used to prepare hyaluronic acid solutions for experiments. However, the electrical properties of tap water were not constant for use. Therefore, normalization, such as the relative evaporation rate to water in this study, was adopted as an alternative index for...

Evaporation is a type of liquid vaporization and occurs along the gas-liquid interface of a collective body of water. The water molecules near the surface become capable of escaping from the liquid due to collision of water molecules. The evaporation rate is an important key factor during the process of evaporation. Generally, a balance or volumetric tube1-3 is widely-used to detect the evaporation of solutions. However, it takes a long time to measure the evaporation rate due to the precision limitation of a balance or a volumetric tube. For this reason, a responsive and high-sensitivity instrument must be developed to probe into the details of the evaporation process.
Electrochemical impedance spectroscopy (EIS) is a fast-response, sensitive and effective experimental means in terms of in-situ impedance detection for electrochemical system characterization4. Therefore, EIS can be applied in various fields, such as recent studies on cellular behavior5, bioanalytical sensing6-7, electrolysis8, conducting polymers9, and electrochemical extraction10. Even though EIS systems had successfully been applied in a wide variety of disciplines, there exist an extremely small number of publications on its application to evaporation research.
Hyaluronic acid, a high molecular weight polysaccharide with strong water-binding potential, is a well-known humectant for cosmetic applications. One hyaluronic acid molecule can bind up to 500 water molecules11 and reach 1,000 times its original volume12. An extremely small amount of hyaluronic acid can possess moisturizing function13-14. Due to the high moisture retention, hyaluronic acid has become an important component of cosmetic humectant products with high commercial value worldwide15.
This study presents the method of a novel impedance-based apparatus featuring high speed detection, small volume sample requirement, and multiple sample measurements16-19. It is presented with a focus on the relative evaporation rate comparison among solutions as a way to validate the superiority of the innovative detection mechanism over a conventional weighing manner.

<table border="0" cellpadding="0" cellspacing="0" width="848">
	<tbody>
		<tr height="28">
			<td height="28" style="height:28px;width:143px;">95 % ethanol</td>
			<td style="width:292px;">Echo Chemical Co., Ltd., Miaoli, Taiwan</td>
			<td style="width:155px;">484000001103C-00EC</td>
			<td style="width:259px;"></td>
		</tr>
		<tr height="45">
			<td height="45" style="height:45px;width:143px;">Acetone</td>
			<td style="width:292px;">Avantor Performance Materials Inc., Center Valley, PA, USA</td>
			<td style="width:155px;">JTB-9005-68</td>
			<td></td>
		</tr>
		<tr height="30">
			<td height="30" style="height:30px;width:143px;">Development solution</td>
			<td style="width:292px;">Kemitek Industrial Crop., Hsinchu, Taiwan</td>
			<td style="width:155px;">12F01031</td>
			<td style="width:259px;">KTD-1</td>
		</tr>
		<tr height="30">
			<td height="30" style="height:30px;width:143px;">Etching solution</td>
			<td style="width:292px;">eSolv Technology Co., Taipei, Taiwan</td>
			<td style="width:155px;"></td>
			<td style="width:259px;">EG-462</td>
		</tr>
		<tr height="45">
			<td height="45" style="height:45px;width:143px;">Hyaluronic acid</td>
			<td style="width:292px;">Shandong Freda Biopharm Co., Ltd., Jinan, China</td>
			<td style="width:155px;">1010212</td>
			<td>Molecular weight 980k, Cosmetic Grade</td>
		</tr>
		<tr height="45">
			<td height="45" style="height:45px;width:143px;">Photoresist solution</td>
			<td style="width:292px;">AZ Electronic Materials Taiwan Co., Ltd., Hsinchu, Taiwan</td>
			<td style="width:155px;">65101M19</td>
			<td style="width:259px;">AZ6112</td>
		</tr>
		<tr height="47">
			<td height="47" style="height:47px;width:143px;">8-well silicone array</td>
			<td style="width:292px;">Greiner bio-one Inc., Frickenhausen, Baden-W&#252;rttemberg, Germany</td>
			<td style="width:155px;">FlexiPERM</td>
			<td></td>
		</tr>
		<tr height="45">
			<td height="45" style="height:45px;width:143px;">ITO glass</td>
			<td style="width:292px;">GemTech Optoelectronics Co., Taoyuan, Taiwan</td>
			<td style="width:155px;"></td>
			<td></td>
		</tr>
		<tr height="43">
			<td height="43" style="height:43px;width:143px;">Vial&#160;</td>
			<td style="width:292px;">Sigma-Aldrich Co. LLC., St. Louis, MO, USA</td>
			<td style="width:155px;">854190</td>
			<td></td>
		</tr>
		<tr height="28">
			<td height="28" style="height:28px;width:143px;">Film photomask</td>
			<td style="width:292px;">Taiwan Mesh Co., Ltd, Taoyuan, Taiwan</td>
			<td style="width:155px;"></td>
			<td></td>
		</tr>
		<tr height="46">
			<td height="46" style="height:46px;width:143px;">Lock-in amplifier</td>
			<td style="width:292px;">Stanford Research Systems, Inc., Palo Alto, CA, USA</td>
			<td style="width:155px;">SR830</td>
			<td></td>
		</tr>
		<tr height="66">
			<td height="66" style="height:66px;width:143px;">Switch relay</td>
			<td style="width:292px;">Instrument Technology Research Center, National Applied Research Laboratories, Hsinchu, Taiwan</td>
			<td style="width:155px;"></td>
			<td></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:143px;">Electronic balance machine</td>
			<td style="width:292px;">Precisa Co., Dietikon, Switzerland</td>
			<td>XS225A</td>
			<td></td>
		</tr>
	</tbody>
</table>

a high performance impedance-based platform for evaporation rate detection

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.

During the evaporation process, the conductive ions in the tested solution became concentrated with the decreasing solution volume, and the impedance of this solution decreased. The rates of weight loss and impedance decrease in the evaporation progress for each tested solution were measured. For comparison purposes, the data in the rates of weight loss and impedance decrease were normalized to water and then plotted together in Figure 5. As illustrated in Figure 5, the weight loss demon...

Watch this Scientific Journal Video about A High Performance Impedance-based Platform for Evaporation Rate Detection at JoVE.com

A High Performance Impedance-based Platform for Evaporation Rate Detection

This paper presents an impedance-based apparatus for evaporation rate detection of solutions. It offers clear advantages over a conventional weight loss approach: a fast response, high-sensitivity detection, a small sample requirement, multiple sample measurements, and easy disassembly for cleaning and reuse purposes.

This paper describes the method of a novel impedance-based platform for the detection of the evaporation rate. The model compound hyaluronic acid was ...

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