DPG Phi
Verhandlungen
Verhandlungen
DPG

Berlin 2024 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

O: Fachverband Oberflächenphysik

O 107: Nanostructured Surfaces and Thin Films

O 107.3: Vortrag

Freitag, 22. März 2024, 11:00–11:15, MA 042

Fabrication of Nanofluidic Channels by Pulsed Laser Irradiation of SiOx-coated Fused Silica — •Nastaran Bakhtiari1,2 and Jürgen Ihlemann11Institut für Nanophotonik Göttingen e.V., Hans-Adolf-Krebs-Weg 1, 37077 Göttingen, Germany — 2Theoretical Physics and Center of Interdisciplinary Nanostructure Science and Technology, FB10, Universität Kassel, Heinrich-Plett-Str. 40, 34132 Kassel, Germany.

Considerably, nanofluidic channels have recently garnered attention. Existing methods for fabricating nanochannels are complex, costly, and time-intensive. In this study, we efficiently created transparent nanofluidic channels on fused silica substrates (SiO2) using a simple two-step process. Employing single-pulse excimer laser irradiation with a rear configuration treated a UV-absorbing silicon suboxide (SiOx) film through the transparent SiO2 substrate. A polydimethylsiloxane (PDMS) superstrate applied before laser exposure served as a confinement for controlled structure formation. Under optimal laser fluence, the thin SiOx film buckled, leading to the formation of channels with a width ranging from 10 to 20 µm and a height of 800 to 1200 nm, exhibiting a bell-like cross-sections following the so-called Euler buckling mode. Wider channels displayed varicose or telephone cord morphologies. Subsequent high-temperature annealing oxidized SiOx, resulting in transparent SiO2 channels. These nanochannels show promise in effectively transporting fluids of various viscosities, demonstrated through capillary action and in line with the Lucas-Washburn equation.

Keywords: Silicon suboxide; Fused silica; Excimer laser; Nanochannels; Nanofluidics

100% | Mobil-Ansicht | English Version | Kontakt/Impressum/Datenschutz
DPG-Physik > DPG-Verhandlungen > 2024 > Berlin