Photothermal Cantilever Deflection Spectroscopy
Why this work is in the frame
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Bibliographic record
Abstract
A real-time technique that does not rely on chemical interfaces or biological receptors for molecular identification of picogram quantities of biomaterials such as DNA molecules in a high throughput fashion is described. This technique combines the extremely high sensitivity of microfabricated bi-material cantilever beams with the high selectivity of mid infrared (IR) spectroscopy to nanomechanically transduce the photon absorption-induced temperature variations of the molecules. Picogram amounts of target molecules were first adsorbed on the cantilever without using any receptors. Illuminating a bi-material cantilever sequentially with a mid-IR radiation results in photon absorption by the molecule at a certain wavelength, which results in a small temperature variation, and the resultant deflection of the bi-material cantilever. A plot of cantilever deflection as a function of an illuminating wavelength closely follows the IR absorption spectrum of the target molecules. We have used this technique to rapidly identify different DNA strands.
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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) | 0.041 | 0.001 |
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