Crystal Growth Mechanism Changes in Pseudo-Dewetted Poly(ethylene oxide) Thin Layers
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Bibliographic record
Abstract
Changes in the crystal growth mechanism were observed in pseudo-dewetted, thin layers of low molecular weight (MW) poly(ethylene oxide) (PEO) on a hydrophilic mica surface. The studies were conducted using two PEO fractions (HPEO and MHPEO) with similar MW's (number-average MW of around 4500 g/mol) but different end-group chemistries. For the HPEO, both ends of the chain are capped by −OH groups. For the MHPEO, one end is capped by an −OH group, while the other end is capped by an −OCH 3 group. Utilizing in-situ atomic force microscopy, the growth of single crystals as a function of time ( t ) was monitored at different crystallization temperatures ( T x ). Depending on the end-group chemistry and T x applied, two growth laws were observed, which state that the crystal lateral size r or the crystal volume V can be linearly proportional to t ( r ∝ t or V ∝ t ). Combined with morphological observations of the single crystals, it could be deduced that when r ∝ t, the crystal growth was nucleation-limited (NL), while in the case of V ∝ t, and thus r ∝ t 0.5 at constant crystal thickness, the crystal growth was diffusion-limited (DL). A change of the crystal growth mechanism from the NL to the DL process was also observed with decreasing T x in the MHPEO sample.
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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) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| 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 it