Nanodomain morphology

Figure 6.6 Schematic of the process for fabricating both nanohole and nanopillar array patterns in Si02- (a) Cylindrical PS-b-PMMA morphology is developed on the substrate surface modified by the neutral PS-r-PMMA layer, (b) PMMA nanodomains are selectively removed by O2 plasma etching. (Ic—e)...

In addition, it a clear relationship was found between the shapes of the nanodomains and the pores, with the porous structure reproducing the morphology of the nanodomains. In low-MAM amount PMMA/MAM blends, the closed pores (Fig. 9.33) reproduce the elongation and alignment of the precursor nanodomains (Fig. 9.34) [101]. In the high-MAM amount PMMA/MAM blends, bicontinuous PMMA/MAM nanostructurations of 25/75 PMMA/MAM blends led to bicontinuous open nanoporous structures [102]. 

The crystallization temperature reported in Table 5.4 for the PEO block within the infiltrated block copolymer is lower (-26° C) than for neat infiltrated PEO. It is not possible to determine exactly the phase volume of PEO in the block copolymer case, because the morphology probably changed with infiltration, as reported for other block copolymers in the literature [230-232], However, in any case, the volume occupied by the PEO chains should be lower than the size of the nanopore. Therefore, the crystallization temperature for the block copolymer case should be lower than the crystallization temperature of the infiltrated PEO homopolymer, exactly as obtained. Hence, the nucleation of the PEO block nanodomains is also homogeneous. 

Crystalline Morphology of Homopolymers Confined in Isolated Nanodomains... 

Model crystalline-amorphous diblock copolymers with a sufficiently large are not easy to synthesize. Therefore, experimental studies on the confined crystallization within soft nanodomains are very limited, and a relationship between the detailed crystalline morphology and the deformation of soft nanodomains is unclear. 

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