a
Department of Mechanical, Aerospace & Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, USA
c
Jülich Centre for Neutron Science, Forschungszentrum Jülich, Jülich, Germany
d
The Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, Oak Ridge, USA
e
Institut Laue-Langevin, B.P. 156, Grenoble Cedex 9, France
f
Department of Chemistry, City University of New York, College of Staten Island, Staten Island, USA
g
The NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, USA
E-mail:
yunliu@nist.gov
h
Department of Chemical Engineering, University of Delaware, Newark, USA
i
Joint Institute for Neutron Sciences, Oak Ridge National Laboratory, Oak Ridge, USA
j
Department of Chemical & Biomolecular Engineering, the University of Tennessee, Knoxville, USA
![[similar]](http://www.rsc.org/images/entities/char_223c.gif)
3 Å) motion upon increasing the molecular protonation. This is contrary to an intuitive picture that increased charge stiffens the 
Soft Matter
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