Hydrogen Bond Networks Near Supported Lipid Bilayers from Vibrational Sum Frequency Generation Experiments and Atomistic Simulations

Autor:	Dogangun, Merve, Ohno, Paul E., Liang, Dongyue, McGeachy, Alicia C., Be, Ariana Gray, Dalchand, Naomi, Li, Tianzhe, Cui, Qiang, Geiger, Franz M.
Rok vydání:	2018
Předmět:	Condensed Matter - Soft Condensed Matter
Druh dokumentu:	Working Paper
Popis:	We report vibrational sum frequency generation spectra from supported lipid bilayers in which the OH and the CH stretching signals are probed at different salt concentrations. Atomistic simulations show a negligible impact of salt on the OH stretching spectra, indicating the observed SFG intensity changes are due to chi(3) and potential dependent contributions. These are further analyzed in the contact of exact-zero reference states. Further experiments and simulations identify specific hydrogen bonding interactions between interfacial water molecules at the PC head group of the zwitterionic DMPC lipids at 3200 wavenumbers. Comment: Pre-edited version, 14 Manuscript pages, 5 Figures, 1 Table, 29 pages Supporting Information available upon request
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1803.01202 Zobrazit plný text záznamu View this record from Arxiv