Nanocontrolled Bending of Discotic Columns by Spiral Networks
Source abstract
Abstract
The anisotropic interfacial tension of discotic phthalocyanines is used to produce intentionally curved columns. When phthalocyanines are confined in a mesoscopic spiral network of nanogrooves (see figure), the alignment of the discotic columns follows the tangential direction down to the micrometer scale. Energetic aspects of the alignment process are discussed and the bending modulus of the columns is determined.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced Materials and Mechanics · Nonlocal and gradient elasticity in micro/nano structures · Force Microscopy Techniques and Applications
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References (26)
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22. The associated cooling rate was about 100 °C s−1. Such a high value permits LC reorganisation without PMMA deformation.
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24. From optical observations we infer that holes and Pcs cover 3/8 and 5/8 of the network surface respectively. Using Equation (1) to define misalignment we interpret the zero light intensity of empty zones as 0 ° or 90 ° orientations of the columns. Thus holes have a nonzero contribution estimated to be 22.5 ° × 0.375 = 8.4 °. This contribution must be subtracted in order to retrace the misalignment of the columns only.
25. We suppose that random alignment results in a uniform distribution of Δθrwithin the interval [0 45 °]. Its mean value is 22.5 °.
26. Radial alignment is frequently observed near the center of spiral networks. The bending of columns does not occur in this simple configuration.