A new understanding on the electrochemical coloration mechanism of titanium surface
Bibliographic record
Abstract
Electrochemical coloration technology has been extensively studied for many years due to its effectiveness in enhancing the aesthetics, corrosion resistance, and biocompatibility of Ti materials. However, the underlying coloration mechanism has not been systematically investigated and verified. Our new finding based on spectrophotometer characterization reveals that the color of oxide film is determined by the diffuse reflection light. The coloration mechanism, attributed to the selective absorption of visible light by the TiO x semiconductor film, is therefore proposed and confirmed. This absorption originates from electron transitions from the impurity levels to the conduction band. Oxide films of various colors exhibit particular absorption peaks, along with specific flat band potentials and charge carrier densities. The energy differences between the conduction band minimum and the Fermi level ( E C - E F ) of oxide films with orange, red, blue, and green colors are 1.77 eV, 1.50 eV, 1.25 eV, and 0.76 eV, respectively, corresponding to the redshift of their visible light absorption peaks. This new discovery provides a new understanding of Ti coloration mechanism and promotes the development of related processes and potential applications.
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How this classification was reachedexpand
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 | 0.001 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".