Suhm group    
People Teaching Research Publications Links
Martin Suhm Ba Chemistry Summary Group publications Institute
Members Ma Chemistry Equipment Suhm publications HBOND2017
Students Ba/Ma Education SPP 1807 Zeuch publications UniVZ
Been here Dipl. Chem. Complex Systems Miscellanies Seminars
Thomas Zeuch PChem Advisor Popular Science Mol. Sociology Miscellaneous
ga-logo_small.gif (4 KB)

Equipment of the Suhm group

Our group has developed a range of powerful instruments to investigate intermolecular interactions. Several of them are quite unique and will not be found in any other laboratory in the world, although they typically function on fairly elementary principles. A (typically pulsed) supersonic jet expansion is crossed by infrared or visible radiation and the absorption or inelastic scattering of the light is detected.

We invent acronyms for some of our experiments. These acronyms have to fulfill several requirements: They should be built from letters contained in an expression which describes the working principle. They should always sound like some kind of internationally known food, which everybody knows, because good food is always fun, like good research. There should be some kind of analogy between the food the acronyms describe and some aspect of the experiment. Sometimes there are hidden meanings as well, which we will not disclose.

ragout-jet

(rapid acquisition - giant outlet; two key features of the pulsed nozzles which are synchronized with a rapid scan interferometer)
(like in a ragout, the ragout-jet provides a mix of differently-shaped and sized chunks of matter in a fluid environment)

Ragout-jet. Click for large picture (147 KB)   Ragout-jet. Click for large picture (148 KB)

filet-jet

(fine - but lengthy; describing the narrow (0.2 mm) but extremely long (600 mm) slit nozzle shape)
(the expansion zone is filet-shaped)

Filet-jet. Click for large picture (741 KB)

Filet-jet. Click for large picture (57 KB)   Filet-jet. Click for large picture (69 KB)   Filet-jet. Click for large picture (65 KB)   Filet-jet. Click for large picture (106 KB)

popcorn-jet

(poppet-controlled resistively heated nozzle; describing the way the compound is enclosed between check-valves to avoid leakage during off-times)
(liquid compounds are typically soaked on molecular sieve pellets and heated like popcorn in this experiment)

Popcorn-jet. Click for large picture (280 KB)   Popcorn-jet. Click for large picture (180 KB)   Popcorn-jet. Click for large picture (140 KB)

Popcorn-jet. Click for large picture (146 KB)   Popcorn-jet. Click for large picture (254 KB)

Popcorn-jet. Click for large picture (152 KB)

muesli-jet

(multiple equidistant slit; describing the arrangement of short parallel slit nozzles which allows for the mixing of reactive gases)
(like in a Swiss muesli, the goal is to mix several ingredients together shortly before consumption)

curry-jet

(classical unrestricted Raman spectroscopy; describing a powerful and universal detection principle)
(C. V. Raman was Indian, and curry is an Indian ragout or spice mixture)

Curry-jet. Click for large picture (235 KB)   Curry-jet. Click for large picture (882 KB)   Curry-jet. Click for large picture (126 KB)

Curry-jet. Click for large picture (411 KB)   Curry-jet. Click for large picture (601 KB)   Curry-jet. Click for large picture (1291 KB)


Suhm group homepage


Revised 2017-01-27