The predicted trend for an increasing HmIm concentration (Figure ) is in line with the above-proposed nucleation and growth mechanisms. At low concentrations (close to the stoichiometric 1:2 ratio), CNT holds, and growth proceeds by monomer or even SBU's addition. For higher molar ratios (which is equivalent to an increasing HmIm concentration), the preferred pathway changes from CNT to more complex mechanisms. Crystalline growth driving forces become more intense, leading to a faster generation of units that attach in an unordered fashion, at any available site, up to the point where diffusion is no longer the limiting step, and short-range phase segregation and internal reorganization takes place.