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Kupser P, Pagel K, Oomens J, Polfer N, Koksch B, Meijer G, von Helden G. 2010. Amide-I and -II Vibrations of the Cyclic beta-Sheet Model Peptide Gramicidin S in the Gas Phase. Journal of the American Chemical Society. 132:2085-2093. Abstract

Kirilyuk A, Demyk K, von Helden G, Meijer G, Poteryaev AI, Lichtenstein AI. 2003. Atomic clusters of magnetic oxides: Structure and phonons. Journal of Applied Physics. 93:7379-7381.

Oomens J, Polfer N, Moore DT, van der Meer L, Marshall AG, Eyler JR, Meijer G, von Helden G. 2005. Charge-state resolved mid-infrared spectroscopy of a gas-phase protein. Physical Chemistry Chemical Physics. 7:1345-1348.

Zhu H, Blom M, Compagnon I, Rijs AM, Roy S, von Helden G, Schmidt B. 2010. Conformations and vibrational spectra of a model tripeptide: change of secondary structure upon micro-solvation. Physical Chemistry Chemical Physics. 12:3415-3425. Abstract

Fielicke A, von Helden G, Meijer G, Simard B, Rayner DM. 2005. Direct observation of size dependent activation of NO on gold clusters. Physical Chemistry Chemical Physics. 7:3906-3909.

Oomens J, von Helden G, Meijer G. 2002. Experimental observation of laser-induced coherent ion motion in a quadrupole trap. International Journal of Mass Spectrometry. 221:163-176.

Demyk K, van Heijnsbergen D, von Helden G, Meijer G. 2004. Experimental study of gas phase titanium and aluminum oxide clusters. Astronomy & Astrophysics. 420:547-552.

Fielicke A, Ratsch C, von Helden G, Meijer G. 2007. The far-infrared spectra of neutral and cationic niobium clusters: Nb-5(0/+) to Nb-9(0/+). Journal of Chemical Physics. 127

Fielicke A, von Helden G, Meijer G. 2005. Far-infrared spectroscopy of isolated transition metal clusters. European Physical Journal D. 34:83-88.

Redlich B, van der Meer L, Zacharias H, Meijer G, von Helden G. 2003. FEL induced dynamics of small molecules on surfaces: N2O on NaCI(100). Nuclear Instruments & Methods in Physics Research Section a-Accelerators Spectrometers Detectors and Associated Equipment. 507:556-560.

Militsyn BL, von Helden G, Meijer GJM, van der Meer AFG. 2003. FELICE - the free electron laser for intra-cavity experiments. Nuclear Instruments & Methods in Physics Research Section a-Accelerators Spectrometers Detectors and Associated Equipment. 507:494-497.

Bakker JM, Aleese LM, Meijer G, von Helden G. 2003. Fingerprint IR spectroscopy to probe amino acid conformations in the gas phase. Physical Review Letters. 91

Bakker JM, Plutzer C, Hunig I, Haber T, Compagnon I, von Helden G, Meijer G, Kleinermanns K. 2005. Folding structures of isolated peptides as revealed by gas-phase mid-infrared spectroscopy. Chem Phys Chem. 6:120-128.

Valle JJ, Eyler JR, Oomens J, Moore DT, van der Meer AFG, von Helden G, Meijer G, Hendrickson CL, Marshall AG, Blakney GT. 2005. Free electron laser-Fourier transform ion cyclotron resonance mass spectrometry facility for obtaining infrared multiphoton dissociation spectra of gaseous ions. Review of Scientific Instruments. 76

Pivonka NL, Kaposta C, von Helden G, Meijer G, Woste L, Neumark DM, Asmis KR. 2002. Gas phase infrared spectroscopy of cluster anions as a function of size: The effect of solvation on hydrogen-bonding in Br-center dot(HBr)(1,2,3) clusters. Journal of Chemical Physics. 117:6493-6499.

Chin W, Mons M, Dognon JP, Mirasol R, Chass G, Dimicoli I, Piuzzi F, Butz P, Tardivel B, Compagnon I et al.. 2005. The gas-phase dipeptide analogue acetyl-phenylalanyl-amide: A model for the study of side chain/backbone interactions in proteins. Journal of Physical Chemistry A. 109:5281-5288.

Oomens J, Sartakov BG, Meijer G, von Helden G. 2006. Gas-phase infrared multiple photon dissociation spectroscopy of mass-selected molecular ions. International Journal of Mass Spectrometry. 254:1-19.

Pagel K, Kupser P, Bierau F, Polfer NC, Steill JD, Oomens J, Meijer G, Koksch B, von Helden G. 2009. Gas-phase IR spectra of intact alpha-helical coiled coil protein complexes. International Journal of Mass Spectrometry. 283:161-168. Abstract

Moore DT, Oomens J, Eyler JR, Meijer G, von Helden G, Ridge DP. 2004. Gas-phase IR spectroscopy of anionic iron carbonyl clusters. Journal of the American Chemical Society. 126:14726-14727.

Fielicke A, von Helden G, Meijer G, Pedersen DB, Simard B, Rayner DM. 2005. Gold cluster carbonyls: Saturated adsorption of CO on gold cluster cations, vibrational spectroscopy, and implications for their structures. Journal of the American Chemical Society. 127:8416-8423.