Gold–Manganese Oxide Core–Shell Nanoparticles Produced by Pulsed Laser Ablation in Water
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
A single-step procedure for the preparation of Au–MnO x NPs was achieved through pulsed laser ablation of a gold–manganese metal target made of a pressed metal powder mixture. First, a 248 nm nanosecond laser at 66.7 J cm –2 was used to synthesize Au–MnO x NPs from a gold–manganese metal target immersed in an aqueous solution at pH 11 (NaOH). It is demonstrated that the Au–MnO x NPs are made of a small Au core (around 5 nm in diameter) surrounded by a very thin manganese oxide layer (0.3–1.3 nm) as characterized by TEM, HAADF HR-STEM, and EELS. The superficial MnO x layer has a local structure that bears a close resemblance to that of Mn 2 O 3 and MnO 2 as revealed by EXAFS and XANES measurements. Comparative studies were also performed with a 1064 nm nanosecond laser at 1.4 J cm –2 . In that case, the resulting colloids are mainly made of a mixture of Au NPs and MnO x NPs, with few Au–MnO x NPs, thereby suggesting the impact of the laser wavelength and fluence on the synthesis process. The mechanisms responsible for the production of Au–MnO x core–shell NPs are discussed.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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