MDL News & Trends
Lab-On-A-Chip and in the Freezer: Analyzing Titan’s Organic Soup
Titan, Saturn’s largest moon, is a captivating world with a thick atmosphere and an active “hydrological” cycle. On this frigid moon, the liquid phase is not water but hydrocarbons — methane and ethane — which form clouds, rain, and large lakes. Energetic atmospheric chemistry generates a plethora of complex organic molecules, which form aerosols and settle onto the surface. Although it is unclear how much organic material is dissolved in the hydrocarbon lakes, the shorelines and extended planetary dune structures are thought to hold vast reserves of complex organics waiting to be explored. Analysis of these complex mixtures requires versatile instrumentation, and in our laboratory we are developing new technologies to enable such analyses.
Using tholins, simulated Titan organic material, we have demonstrated automated lab-on-a-chip devices such as that pictured below. In our work, we utilize solvents with low freezing points that can dissolve organics and enable in situ analyses in Titan’s native environment. By coupling low-temperature-capable architectures with ultrasensitive detection techniques, we can generate a “fingerprint” of a complex organic sample, such as long-chain amines to better understand the organic chemistry on Titan (see figure below).