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

Dette arbejde blev sponsoreret af Ministeriet for Videnskab og Teknologi, Taiwan, under tilskud numre MEST 104-2221-E-241-001-My3 og MEST 105-2627-B-005-002.

1. Eksperimentel Chip Module <ol><li> Fabrikere indiumtinoxid (ITO) elektrode chip ved fotolitografi og kemiske våde ætseprocesser <ol><li> Få en ITO substrat (370 mm x 480 mm x 0,5 mm (L x B x H)) med en 2600 Å ITO lag kommercielt (se Materialer List). Skær ITO-substrat til dimensionerne af 90 mm x 90 mm x 0,5 mm med et glas cutter for ITO elektroden mønsterdannelsesprocessen i en 4 tommer aligner. </li><li> Brug en ultralyds renere at rengøre ITO glas med acetone og derefter med deioniseret v...

<ol>
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Det kritiske skridt for fordampning måling i denne impedans-baseret detektion er forberedelsen af ​​de testede løsninger. Deioniseret vand kan ikke anvendes på grund af dens enorme impedans. I stedet blev ledningsvand indeholdende ledende ioner anvendes til fremstilling af hyaluronsyreopløsninger til eksperimenter. Imidlertid er de elektriske egenskaber af ledningsvand var ikke konstant til brug. Derfor normalisering, såsom den relative fordampningshastighed til vand i denne undersø...

Fordampning er en type af væskefordampningssystem og forekommer langs gas-væske-grænsefladen af ​​en kollektiv vandmasse. Vandmolekylerne nær overfladen bliver i stand til at undslippe fra væsken på grund af kollision af vandmolekyler. Fordampningshastigheden er en vigtig nøglefaktor under processen med fordampning. Generelt er en balance eller en volumetrisk rør 1-3 er udbredt til påvisning af fordampning af løsninger. Men det tager lang tid at måle fordampningshastigheden som følge af den præcision begrænsning af en balance eller en volumetrisk rør. Derfor skal en responsiv og høj følsomhed instrument udvikles til sonde i detaljer med fordampningsprocessen. Elektrokemisk impedans spektroskopi (EIS) er en hurtig-respons, følsomme og effektive eksperimentelle midler i form af in-situ impedans detektion til elektrokemisk system, karakterisering 4. Derfor kan EIS anvendes i forskellige fieLDS, såsom de seneste undersøgelser på cellulær adfærd 5, bioanalytisk sensing 6-7, elektrolyse 8, ledende polymerer 9 og elektrokemiske udvinding 10. Selvom EIS-systemer med succes var blevet anvendt i en lang række forskellige discipliner, der findes et meget lille antal publikationer om dens anvendelse til fordampning forskning. Hyaluronsyre, et polysaccharid med høj molekylvægt med stærk vand-bindende potentiale, er en velkendt fugtighedsbevarende middel til kosmetiske anvendelser. En hyaluronsyre molekyle kan binde op til 500 vandmolekyler 11 og nå 1.000 gange dens oprindelige volumen 12. En ekstremt lille mængde af hyaluronsyre kan besidde fugtgivende funktion 13-14. På grund af den høje tilbageholdelse fugtighed er hyaluronsyre blevet en vigtig bestanddel af kosmetiske fugtighedsbevarende produkter med høj kommerciel værdi verdensplan 15. Thans undersøgelse præsenteres metoden til en ny impedans-baserede apparater med høj hastighed afsløring, små krav prøvevolumen, og flere prøve målinger 16-19. Den præsenteres med fokus på den relative fordampning sats sammenligning blandt løsninger som en måde at validere overlegenhed innovative afsløring mekanisme over en konventionel vejer måde.

<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

Dette papir beskriver fremgangsmåden ifølge en hidtil ukendt impedans-baseret platform til påvisning af fordampningshastigheden. Modellen sammensatte hyaluronsyre blev ansat her til demonstration. Flere fordampning tests på modellen forbindelse som et fugtighedsbevarende middel med forskellige koncentrationer i opløsninger blev udført til sammenligning. En konventionel vægttab tilgang er kendt som den mest ligetil, men tidskrævende, måling teknik til fordampningshastigheden detektion. Men en klar ulempe er, at en stor mængde prøve er påkrævet, og multiple sample test kan ikke udføres på samme tid. For første gang i litteraturen, er en elektrisk impedans sensing chip anvendt med succes til en real-time fordampning undersøgelse i en tid deling, kontinuerlig og automatisk måde. Endvidere så lidt som 0,5 ml af prøver er påkrævet i denne impedans-baserede apparater, og en stor impedans variation påvises blandt forskellige fortyndet solutions. Den foreslåede høj følsomhed og hurtig respons impedans sensorsystem findes at outperforme en konventionel vægttab tilgang i form af fordampning sats afsløring.

Under fordampningsprocessen, de ledende ioner i den testede opløsningen blev koncentreret med den faldende opløsningens rumfang og impedansen af ​​denne opløsning faldt. Satserne for vægttab og impedans fald i forløbet for hver testet løsning fordampning blev målt. Til sammenligningsformål dataene i satserne for vægttab og impedans fald blev normaliseret til vand og derefter afbildet sammen i figur 5. Som illustreret i figur 5, vægttab viser samme tendens som impedans, og ...

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

Denne artikel præsenterer en impedans-baserede apparater til fordampning sats detektion af løsninger. Det giver klare fordele i forhold til en konventionel vægttab tilgang: en hurtig respons, høj følsomhed afsløring, en lille krav prøve, flere prøve-målinger, og let adskillelse for rengøring og genbrug formål.

En High Performance Impedans-baserede Platform for Fordampningshastighed 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 ...

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