0428同步年報-2021-全

038 ACTIVITY REPORT 2021 Fig. 2 : (a) FFR-TEM image of complicated micelles as STM and silica deposition nanoplates of a ternary surfactant organic template of SDS-CTAB-P123 at R = [SDS]/[CTAB]=1.5. (b) SANS profiles of the D 2 O solutions of deuterated-SDS, deuterated-CTAB, and P123, with varied x = [SDS]/[P123], at fixed R = 1.5 and [P123] = 0.8 mM. (c) SAXS profiles were measured for sample solutions of P123 and SDS/CTAB of varied surfactant mixing ratios R , with fixed CTAB (13.9 mM) and P123 (0.8 mM). [Reproduced from Ref. 2] Fig. 3 : Time-resolved FFR-TEM images presenting the structural evolution of silicate micelles of P123 and catanionic surfactants (with R = 1.5 and x = 26) at reaction times (a) t = 0, (b) 5 min, (c), 30 min, and (d) 120 min. The TEM images in the insets of (b) and (d) respectively show in-plane, locally ordered lamellar domains. (e) Time-resolved SAXS profiles measured for an optimized sample solution of P123 and catanionic surfactants (with R = 1.5 and x = 26), before ( t = 0) and after addition of silicate source. The larger- q data at t = 0 are fitted ( ─ ) with prolate core-shell micelles. The small- q signal at 0.014 Å -1 corresponds to a vertical stacking order ( d -spacing 45 nm) of the micellar plates as illustrated in the cartoon. (f) A proposed process to form vertically oriented and organized silica nanochannels. The bottom cartoon shows the transition of lamellar to 2D hexagonally packed nanochannels after silicate deposition. [Reproduced from Ref. 2]