S1 Supporting Information Highly Ordered Self-Assembly of 1D Nanoparticles in Phospholipids Driven by Curvature and Electrostatic Interaction Tae-Hwan Kim, Shin-Hyun Kang, Changwoo Doe, Jihyun Yu, Jun-Bo Sim, Jehan Kim, Steven R. Kline, and Sung-Min Choi* Sample preparation -Materials Dioleoyltrimethylammoniumpropane (DOTAP) and dioleoylphosphatidylcholine (DOPC) were purchased from Avanti Polar Lipids. Octyltrimethylammonium bromide (C 8 TAB), decyltrimethylammonium bromide (C 10 TAB), and sodium 4-styrenesulfonate (NaSS) were purchased from Fluka. Dodecyltrimethylammonium bromide (C 12 TAB), cetyltrimethylammonium bromide (C 16 TAB), 4-vinylbenzoic acid (VBA) and Dowex 550A OH anion-exchange resin were purchased from Aldrich. Tetradecyltrimethylammonium bromide (C 14 TAB) was purchased from Sigma. The water-soluble free-radical initiator VA- 044 (2,2'-azobis[2-(2-imidazolin-2-yl)propane] dihydrochloride) was purchased from Wako Chemicals. D 2 O (99.9 % by mole deuterium enriched) was purchased from Cambridge Isotope Laboratory. H 2 O was purified by a Millipore Direct Q system immediately before use. -Preparation of C n TVB and cROD n C n TAOH (n = 8, 10, 12, 14, and 16, the number of carbon in alkyl chain) was prepared by ion exchange of the Br- of C n TAB with OH- using Dowex 550A OH anion-exchange resin. n-