Synthesis and Properties of Luminescent Silicon Nanocrystal/Silica Aerogel Hybrid Materials
Bibliographic record
Abstract
Exploiting the chemical compatibility of transparent high surface area silica aerogels and environmentally benign luminescent silicon nanocrystals (SiNCs) opens the door to a new class of silicon-based hybrid materials. Hydrophilic SiNCs of various sizes and surface groups that photoluminesce throughout the visible and NIR spectral regions were synthesized and incorporated into a tetramethyl orthosilicate containing solution to produce luminescent aerogels of varied transparency. Photoluminescence (PL) spectroscopy performed on solutions and aerogel monoliths containing SiNCs reveal that the optical properties of SiNCs are dependent on their size and surface chemistry. Furthermore, the incorporation of SiNCs into aerogels does not influence their PL response. The nitrogen adsorption–desorption measurements indicate that the physical properties of aerogels may be tailored by changing the SiNC size and surface chemistry. Adding to the appeal of the present work, PL quenching of SiNC-loaded aerogel upon exposure to nitrobenzene confirms that SiNCs remain chemically accessible.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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) | 0.001 | 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 source (direct Gemma or distilled Codex), 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".