Study of radial growth in patterned self‐catalyzed GaAs nanowire arrays by gas source molecular beam epitaxy
Bibliographic record
Abstract
Abstract magnified image Ordered arrays of vertically aligned self‐catalyzed GaAs nanowires have been grown by gas source molecular beam epitaxy (GS‐MBE) on silicon substrates using nano‐patterned oxide templates. Several growth processes of different duration were performed under identical conditions and with identical sample preparation. To determine the influence of pattern parameters, the samples were prepared with 20 patterned areas, each with progressively increasing hole diameters and pitch. Measurements of the average lengths and diameters of the vertically oriented nanowire areas were then used to calculate the overall axial and radial growth rates. These experiments confirm that significant accompanying radial growth occurs. Furthermore, the rate of radial growth increases with increasing pattern pitch. We propose that gallium‐rich conditions may increase the size of the liquid droplet, resulting in an inverse tapered morphology which promotes step‐flow radial growth via secondary adsorption on the nanowire sidewalls. The pitch dependence of the radial growth rate may therefore be due to shadowing or competition for the flux of material desorbing from the oxide surface between the nanowires. (© 2013 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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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) | 0.001 | 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 | 0.001 |
| 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".