The intermixing between the head and tails in the TX-100 micelles is also evidenced by the orientation of the hydrophilic heads. Using the ⟨P2⟩ order parameter (see SI for details), we quantify the average orientation of the EO chain with respect to the surface normal. For C12EO10, we observe a higher degree of disorder, with the orientation of the EO chains being almost uniformly distributed (⟨P2⟩ = 0.08 ± 0.06), while the TX-100 chains attained a higher ordering (⟨P2⟩ from 0.13 ± 0.07 to 0.33 ± 0.03). These numbers for TX-100 are still below 1.0, which would indicate angles in perfect alignment with the surface normal, but are also significantly higher than 0.0 and therefore not uniformly distributed. The explanation for the higher ordering comes from the burial of part of these chains in the hydrophobic core, which hinders the movement of the portion of the chain closest to the hydrophobic moiety. The length of the EO chains is not affected by this intrusion of hydrophilic beads in the core and, overall, the EO chains are coiled, measuring around 18 Å, in contrast to the approximately 30 Å they would measure if stretched. For the smaller spherical TX-100, the EO chains tend to be even more coiled, to have fewer molecules covering a bigger surface.