20.500.12556/RUL-187636 Izdelava in eksperimentalno ovrednotenje zaprtega sistema digitalne mikrofluidike Fabrication and experimental evaluation of a closed digital microfluidics system Magistrska naloga obravnava izdelavo in analizo delovanja sistema digitalne mikrofluidike, ki temelji na elektro-omočenju na dielektriku, kjer je kapljica stisnjena med dve vzporedni plošči in krmiljena na mreži elektrod z algoritmom. Na začetku je predstavljeno teoretično ozadje, ki obsega fizikalno ozadje omočenja za razumevanje delovanja, uporabljene tehnike in materiale, zgradbo naprav ter nekatere primere uporabe. Sledi eksperimentalno delo, ki opisuje postopek izdelave elektrod z lasersko fotolitografijo ter nanos dielektrične in hidrofobne plasti z nanašanjem z vrtenjem. Prav tako je predstavljena rešitev namestitve in prilagajanja zgornje plošče, ki je bila tudi samostojno eksperimentalno ovrednotena. Opisana sta še merilna proga in način krmiljenja. Potrdili smo delovanje zaprtega sistema in dokazali zmožnost za več vrst manipulacij kapljic. Testirali smo zmožnosti izdelanega sistema pri različnih volumnih kapljice in pri 175 V dosegli hitrosti premika 100 mm/s . Premik smo dosegli z minimalno napetostjo 140 V. Z ustreznimi parametri smo pokazali ponavljajoče se združevanje in ločevanje. Med operacijami smo opazovali natančno dinamiko kapljice in poročali o opaženih pojavih. Naloga predstavlja izhodišče za nadaljnje delo z zaprtimi sistemi in kompleksnejšimi konfiguracijami. This master’s thesis presents the fabrication and analysis of a digital microfluidic system based on electrowetting on dielectric. A droplet is enclosed between two parallel plates, and its movement across an electrode array is controlled by an algorithm. The theoretical part covers the fundamentals of wetting, materials and fabrication techniques, device structure, and selected applications. The experimental part describes electrode fabrication by laser photolithography and the deposition of dielectric and hydrophobic layers by spin coating. The mounting and adjustment of the top plate, which was also evaluated independently, are presented together with the experimental setup and control method. The operation of the closed system was confirmed by performing different droplet manipulation operations. Tests with various droplet volumes reached a velocity of 100 mm/s at 175 V, while the minimum voltage required for movement was 140 V. With suitable operating parameters, repeated droplet merging and splitting were achieved. Droplet dynamics during these operations were observed, and the associated phenomena are discussed. The work provides a basis for further development of closed digital microfluidic systems and more complex configurations. površinska napetost elektro-omočenje digitalna mikrofluidika manipulacija kapljice kot omočenja litografija elektroda surface tension electrowetting digital microfluidics droplet manipulation contact angle lithography electrode true false false [L. Murnc] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2026-09-12 08:30:37 2026-09-12 08:30:42 2026-09-17 11:01:59 0000-00-00 00:00:00 2026 0 Ljubljana 0 XXII, 80 str. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 532.5:621.3:544.722.3(043.2) 290298 291412227 49710.pdf 49710.pdf 1 2D9C447FCA4C8964BB253B1A411F713A 6187de21303d78c97fc01f984372cba73bc5dccac3d1003fddbdc311c2d3fc5e 74282aa7-ae73-11f1-8bc5-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=247336 Fakulteta za strojništvo 0 0 0