Structure and Excited‐State Interactions in Composites of CdSe Nanorods and Interface‐Compatible Polythiophene‐<i>graft</i>‐poly(<i>N</i>,<i>N</i>‐dimethylaminoethyl methacrylates)
Bibliographic record
Abstract
Abstract We report the preparation and characterization of two comb‐like graft copolymers, polythiophene‐ graft ‐poly( N , N ‐dimethylaminoethyl methacrylates) (PT 700 ‐ g ‐PDMA 60 and PT 220 ‐ g ‐PDMA 16 , where the subscripts represent the number average degree of polymerization), and an investigation of their interaction with CdSe nanorods. Each polymer contains a regiorandom polythiophene (PT) as the backbone, from which poly( N , N ‐dimethylaminoethyl methacrylate) (PDMA) chains are densely grafted. The PDMA arms serve as multidentate ligands for CdSe semiconductor nanocrystals and increase the compatibility between the PT backbone and the nanocrystals. Using electron microscopy, we examined the morphology and the internal structure of the nanorod/polymer composites formed in toluene. The morphology and the internal structure of the composites vary with a change in the nanorod/polymer ratio as well as with the concentration of each component. The results of steady‐state fluorescence spectroscopy indicate that the presence of the nanocrystals in toluene leads to photoluminescence (PL) quenching of the PT backbone in the graft copolymer with relatively short PDMA arms (PT 220 ‐ g ‐PDMA 16 ). In contrast, no PL quenching could be detected in composites formed from a similar polymer with longer PDMA arms (PT 700 ‐ g ‐PDMA 60 ). A likely explanation of this result is that in composites formed with PT 700 ‐ g ‐PDMA 60 , the nanocrystals are held too far from the PT backbone for energy transfer or charge transfer to take place. magnified image
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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 | 0.000 | 0.000 |
| 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 | 0.000 |
| Open science | 0.000 | 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".