The surface of lyophilized and ground solids samples were characterized using Scanning Electron Microscopy-Energy Dispersive Spectroscopy (SEM-EDS) in the Microscopy Suite at the Beckman Institute for Advanced Science and Technology at UIUC. Before imaging, the samples were mounted on a stub using carbon tape. The samples were imaged using a SEM (Model Quanta FEG 450, FEI company) operating at 15.0 kV and at a working distance of 10 mm. The elemental compositions were measured using the EDAX light-element energy-dispersive spectroscopy system (AMETEK, Inc.) attached to the SEM.