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Record W153696276

Micro-fluidic flow cells for studies of electrochemical reactions

2014· dissertation· en· W153696276 on OpenAlexfundno aff
Mats Ingdal

Bibliographic record

VenueBIBSYS Brage (BIBSYS (Norway)) · 2014
Typedissertation
Languageen
FieldChemistry
TopicElectrochemical Analysis and Applications
Canadian institutionsnot available
FundersNorges Teknisk-Naturvitenskapelige UniversitetUniversity of Victoria
KeywordsPlatinumElectrodeMaterials scienceReference electrodeElectrochemistryWorking electrodeTitaniumNanotechnologyChemical engineeringAnalytical Chemistry (journal)ChemistryMetallurgyCatalysisChromatography
DOInot available

Abstract

fetched live from OpenAlex

Micro fluidic flow cells (MFFCs) are a relatively new technique for characterization of electrochemical reactions. This work includes both techniques for manufacturing the cells and electrochemical characterization of them.Improvements to a previously established procedure for the manufacturing MFFCs included change of template for PDMS-masters from glass slides to silicon wafers and the change from electrodes consisting of titanium gold and platinum to only titanium and platinum. The changes to the PDMS-masters improved the channel parameters and durability. The changes to the electrodes removed the problem with exposed gold surfaces interfering with at the platinum electrode, and increased the life time of the electrodes significantly. A method for removing oxygen from the MFFCs was also established. Experiments using ferrocyandie redox couple did not show reversible behavior using both platinum and iodine-coated platinum electrodes. Experiments using ruthenium redox couple achieved near reversible behavior using both platinum and iodine-coated platinum electrodes. The iodine-coating showed higher stability and was implemented as a part of the standard procedure. The effect of the placement of the internal reference electrode was investigated. The results indicate that the reference should be place upstream for the working electrode and the counter electrode should be placed downstream for the working electrode. The distance between the working and counter should exceed the distance between the working and reference electrode to minimize interference. Results from potentiostatic and downstream glavnostatic electrochemical impedance both showed trends compatible with theoretical predictions. Due to fluctuations in the open-circuit potential the results showed low reproducibility.

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.

How this classification was reachedexpand

Full frame distilled prediction

Teacher imitation

Not 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.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesMeta-epidemiology (narrow)
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Bench or experimental · Consensus signal: Bench or experimental
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.115
Threshold uncertainty score0.999

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0010.001
Meta-epidemiology (broad)0.0020.001
Bibliometrics0.0000.001
Science and technology studies0.0000.000
Scholarly communication0.0000.000
Open science0.0010.000
Research integrity0.0010.001
Insufficient payload (model declined to judge)0.0010.000

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.

Opus teacher head0.015
GPT teacher head0.279
Teacher spread0.265 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it

Classification

machine, unvalidated

Machine predicted; a candidate call from one teacher head, not a consensus.

Study designBench or experimental
Domainnot available
GenreEmpirical

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".

Quick stats

Citations0
Published2014
Admission routes1
Has abstractyes

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