Physical analysis of teflon coated capillary waveguides

Microfluidic chips for guiding lights through micro polymeric channels injected with photopolymer liquids

“…Schueller et al [2] first used soft lithography to fabricate arrays of liquid-core waveguides (LCWs). In addition, Teflon AF coating as a cladding was found to be very useful on LCWs [3], since when other researchers have recognised the importance in waveguides of using Teflon as cladding material [4][5][6][7]. In this case, the Teflon film spin-coated onto the inner surfaces of microfluidic channels was applied to deliver lights by the principle of total internal reflection (TIR).…”

Spatial control of dewetting: Highly ordered Teflon nanospheres

“…Fluorinated polymers have been of great interest due to potential applications, like waveguides, release layers for pattern transfer, separation membranes, and superhydrophobicity arising from their low surface energies, low dielectric constants, and chemical and thermal stabilities [1][2][3][4]. Teflon AF (Dupont), which is made by the copolymerization of 2,2-bistrifluoromethyl-4,5-difluoro-1,3-dioxole with other fluorine-containing monomers, is one of the most used fluorinated polymer.…”

Simple and sensitive protein detection system using UV LEDs and liquid core waveguides

“…In the ultraviolet they are only used in the area of HPLC analysis and then mainly to reduce the sample cell volume and increase the pathlength from the traditional 10 mm up to 50 mm (8,12). Several large core diameter liquid core waveguides (Type I) were designed and tested for the detection of nitrate and nitrite in the 200 to 250nm wavelength region (23,24). In this work, the performance of Type II liquid core waveguides of 100 and 500 mm pathlength in the UV is evaluated using standard spectrometry, but as well more interestingly a UV-LED based selfreferencing detection system.…”