Nanoclustered Co−Au Particles Fabricated by Femtosecond Laser Fragmentation in Liquids
Why this work is in the frame
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Bibliographic record
Abstract
Heterostructured nanoparticles, consisting of Au and Co nanoclusters, have been synthesized by a two-step femtosecond laser technique. Au and Co targets were ablated and fragmented in acetone resulting in nanoparticles with an average diameter of 11 nm. Particles showed concomitant optical characteristics of Au and magnetic properties of Co. Energy dispersive X-ray scattering confirmed the presence of both material in each nanoparticle and showed that the relative concentration of Au and Co can be controlled. Unalloyed Au nanoclusters are estimated to be 1.5 nm from X-ray diffraction measurement of the 220 peak width and position. Pure Co nanoparticles have a room temperature magnetization of 28 emu/g, much lower than the bulk value of 143 emu/g, probably due to surface oxidation. In the bimetallic nanostructures, Au replaced oxidized Co and protected the core from oxidation. Nanoparticles consisting of 68% Co and 32% Au showed a magnetization of 51.3 emu/g which represents a 83% increase per Co atom compared to pure Co nanoparticles.
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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) | 0.000 | 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 it