Synthesis of Polymer‐like Hydrogenated Amorphous Carbon by fs‐pulsed Laser Induced Plasma Processing of Solid Hexane
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Bibliographic record
Abstract
Abstract A new technique, that involves the plasma processing of frozen hydrocarbons by a pulsed laser generated graphitic plasma, is presented. Polymer‐like hydrogenated amorphous carbon (a‐C:H) thin films were created by allowing the plasma generated during the fs‐pulsed laser ablation of a highly oriented pyrolytic graphite target in high vacuum, to impact on solid layers of n ‐hexane (CH 3 (CH 2 ) 4 CH 3 ) at 77 K. This technique results in the formation of thin films whose morphology and properties are shown to depend on the plasma processing time t p . Polymer‐like a‐C:H with residual hexane incorporated into the carbon matrix and exhibiting a unique dendritic surface morphology was formed after short processing times. Following longer processing times, these dendritic structures are destroyed resulting in thin films having similar spectral properties to those of conventional a‐C:H. The composition of the plasma was studied using time of flight mass spectrometer (TOF‐MS) and the surface morphology of the synthesized thin films was examined by atomic force microscopy (AFM). A variety of analytic techniques including photoluminescence (PS), UV–Vis absorption, surface enhanced Raman (SERS), and Fourier transform infrared (FTIR) spectroscopy have been used to characterize the structure and composition of these materials. magnified image
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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 | 0.000 | 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 | 0.000 | 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 it