Aerogel-Lined Capillaries as Liquid-Core Waveguides for Raman Signal Gain of Aqueous Samples: Advanced Manufacturing and Performance Characterization
Felix Spiske,
Lara Sophie Jakob,
Maximilian Lippold,
Parvaneh Rahimi,
Yvonne Joseph,
Andreas Siegfried Braeuer
Affiliations
Felix Spiske
Institute of Thermal, Environmental and Resources’ Process Engineering (ITUN), Technische Universität Bergakademie Freiberg (TUBAF), 09599 Freiberg, Germany
Lara Sophie Jakob
Institute of Nanoscale and Biobased Materials (INBM), Technische Universität Bergakademie Freiberg (TUBAF), 09599 Freiberg, Germany
Maximilian Lippold
Institute of Nanoscale and Biobased Materials (INBM), Technische Universität Bergakademie Freiberg (TUBAF), 09599 Freiberg, Germany
Parvaneh Rahimi
Institute of Nanoscale and Biobased Materials (INBM), Technische Universität Bergakademie Freiberg (TUBAF), 09599 Freiberg, Germany
Yvonne Joseph
Institute of Nanoscale and Biobased Materials (INBM), Technische Universität Bergakademie Freiberg (TUBAF), 09599 Freiberg, Germany
Andreas Siegfried Braeuer
Institute of Thermal, Environmental and Resources’ Process Engineering (ITUN), Technische Universität Bergakademie Freiberg (TUBAF), 09599 Freiberg, Germany
An advanced process for the manufacturing of aerogel-lined capillaries is presented; these are applicable as liquid-core waveguides for gaining the Raman signal of aqueous samples. With respect to the spin-coating process we have used so far for the manufacturing of aerogel-lined capillaries, the here-presented manufacturing process is advanced as it enables (i) the lining of longer capillaries, (ii) the adjustment of the lining-thickness via the lining velocity, and (iii) the reproducible generation of crack-free linings. The key parameters of the advanced process and their effect on the fabrication of aerogel-lined capillaries with optimal Raman signal gain are reported and related to the thickness and topography of the aerogel linings by the support of scanning electron microscopy.
