Liquid crystalline block copolymers for macroscopic nanodomain orientation and photoinduced microphase separation
Bibliographic record
Abstract
We report the design and study of new liquid crystalline block copolymers (LC-BCPs) with which unusual properties and functions can be obtained. On the one hand, we prepared the first LC-BCP comprising regioregular poly(3- hexylthiophene) (P3HT) and a side-chain liquid crystalline polymer (SCLCP) bearing azobenzene mesogens (PAzoMA). With the SCLCP block having a clearing temperature above the high crystal melting temperature of P3HT, surface- and photoinduced orientation of mesogens in PAzoMA can be used to align stripe nanodomains of P3HT on a macroscopic scale. This study demonstrates a promising pathway to achieving and manipulating macroscopically ordered nanodomains of π-conjugated polymers. On the other hand, by using a rationally designed diblock copolymer composed of two SCLCPs, photoinduced microphase separation in BCPs was achieved for the first time. In this case, the miscibility of the two LC blocks is promoted by the miscibility between the two types of mesogenic side groups, while upon UV light irradiation inducing the trans-cis isomerization of azobenzene mesogens on one block, the shape incompatibility of bent cis isomers with an ordered LC phase drives the two blocks to separate from each other resulting in a microphase separated morphology. This study shows the perspective of using light to process and organize BCP morphology and related nanostructures in a lithography-free manner.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".