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. 2019 Jul 16;117(4):751–766. doi: 10.1016/j.bpj.2019.07.011

Figure 3.

Figure 3

Time-resolved “pump-probe” neutron interferometry. (A) The cyclic sequence of hyperpolarizing and depolarizing transmembrane voltage pulses, together with the triplet of incident neutron pulses utilized for each voltage (blue hyperpolarizing, red depolarizing), employed in the time-resolved neutron interferometry experiment is shown. (B) Fresnel-normalized neutron reflectivity R(Qz)/RF(Qz), averaged over the hyperpolarizing voltage pulses (blue), is shown compared with that averaged over the depolarizing voltage pulses (red) for the KvAP-POPC membrane of specimen S2 at an aqueous solvent contrast of 60% D2O/40% H2O. (C) Similar Fresnel-normalized neutron reflectivity R(Qz)/RF(Qz) is shown for the same specimen at a contrast of 90% D2O/10% H2O. The standard errors for each are based on the reflected neutron counting statistics.