Shape-Controlled Synthesis of Poly(styrene sulfonate) and Poly(vinyl pyrolidone) Capped Lead Sulfide Nanocubes, Bars, and Threads
Bibliographic record
Abstract
Lead sulfide nanocrystals (NCs) along with nanothreads and nanosheets were synthesized in the presence of water soluble polymers such as poly(styrene sulfonate) sodium salt (PSS) and poly(vinyl pyrolidone) (PVP) in aqueous phases at relatively mild temperature of 80 °C. The amount of each polyelectrolyte was systematically varied between 1 and 4 mM (monomolar based). The presence of PSS produced roughly cubic geometries at low concentrations, while nanothreads and nanosheets were produced at high concentrations. This was not so in the presence of equivalent amounts of PVP, where only fine cubes and nanobars were obtained. The shape and structure of all kinds of geometries were characterized by TEM, FESEM, EDX, and XRD analyses. All results demonstrated that the different preferential adsorption of polyelectrolyte PSS and neutral PVP for different crystal planes of the fcc geometry of PbS controlled the final morphology.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| 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".