@article {19740, title = {Interactions of Polyelectrolytes with Water and Ions at Air/Water Interfaces Studied by Phase-Sensitive Sum Frequency Generation Vibrational Spectroscopy}, journal = {Journal of Physical Chemistry C}, volume = {117}, number = {30}, year = {2013}, note = {Times Cited: 8}, pages = {15698-15703}, author = {Hu, Dan and Yang, Zheng and Chou, Keng C.} }