Ordinario D.D., Phan L., Walkup IV W.G. et al. · Nature Chemistry · 2014 · 596-602
Open a family to keep every result attached to its sample, method and conditions.
Paraphrased for this database from the authors’ stated interpretations — never quoted verbatim — and kept separate from reported measurements.
Reflectin can act as the active channel in protein-based protonic transistors with gate-controlled proton current.
Caveat: Device behaviour includes hysteresis and small low-bias barrier; technology demonstration rather than optimised transistor platform.
600 · Results · Figure 5 · Linked to 5 structured results
No conductive MOF material is synthesised or measured in this paper; metal-organic frameworks are mentioned only as contextual comparator materials.
Caveat: The assigned category requests conductive-MOF extraction, but the actual target material is a protein.
596 · Abstract
Aspartic and glutamic acid carboxylic residues contribute to reflectin proton conductivity, probably through proton donation or hydrogen bonding.
Caveat: DE->A mutation affects chemistry and may also alter local structure; water uptake was similar, supporting but not proving the interpretation.
599 · Results · Figure 3 · Linked to 3 structured results
Reflectin's conserved repeat structure and self-assembly likely aid formation of conductive hydrogen-bonded water networks.
Caveat: Internal hydrated solid-state structure is not solved in this paper.
601 · Discussion · Linked to 3 structured results
The activation energy and humidity/isotope behaviour are consistent with a Grotthuss-type proton transport mechanism through hydrogen-bonded water networks.
Caveat: Authors describe this as consistent with Grotthuss transport; water-channel morphology is proposed but not fully resolved.
599 · Results · Figure 4 · Linked to 3 structured results
Reflectin thin films function as a proton-conducting material rather than a redox/electronic conductor under the reported conditions.
Caveat: Conductivity mechanism is inferred from multiple indirect measurements rather than direct isotope tracer transport.
601 · Discussion · Linked to 4 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| DE->A mutant reflectin A1 | Reflectin A1 mutant with all aspartic acid and glutamic acid residues substituted with alaninenone · not a MOF; mutant structural protein | unknown · PristineDesigned mutant retaining repeated subdomain architecture but replacing D/E residues with alanine. | 598 · Results · Figure 3 |
| Random mutant reflectin A1 | Scrambled reflectin A1 mutant retaining amino acid composition but lacking repeat motifsnone · not a MOF; scrambled structural protein | unknown · PristinePrimary amino acid order scrambled to eliminate conserved repeating subdomains. | 599 · Results · Figure 3 |
| Wild-type reflectin A1 from Doryteuthis pealeii | Histidine-tagged reflectin A1 protein; GenBank ACZ57764.1; ca. 40 kDa monomernone · not a MOF; structural protein with charged amino acid residues and six repeating subdomains | unknown · PristineAggregated platelet-like thin films; primary sequence contains six repeating subdomains separated by variable linker regions; little-to-no organised secondary structure reported for reflectins. | 596 · Introduction |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| DE->A mutant reflectin A1 thin film with PdHx electrodesresearch_0184__mat__mat_reflectin_a1_dea | Thin Film · Pristine Control · Pristine Framework | Mutant protein expressed/purified, drop-cast as film, and measured at 90% RH with PdHx contacts.SiO2/Si with Cr/Pd electrodes converted in situ to PdHx · 1.0 um; width 210 um; length 50 um | 599 · Figure caption · Figure 3 |
| Random mutant reflectin A1 thin film with PdHx electrodesresearch_0184__mat__mat_reflectin_a1_random | Thin Film · Pristine Control · Pristine Framework | Scrambled mutant protein expressed/purified, drop-cast as film, and measured at 90% RH with PdHx contacts.SiO2/Si with Cr/Pd electrodes converted in situ to PdHx · 1.1 um; width 220 um; length 50 um | 27 · Supplementary Table 2 · Supplementary Table 2 |
| Reflectin thin film on gold working electroderesearch_0184__mat__mat_reflectin_a1_wt | Electrode · Target Sample · Pristine Framework | Reflectin solution deposited onto cleaned gold electrode and dried overnight.2 mm diameter gold working electrode · not reported | 6 · Electrochemistry of Reflectin Thin Films |
| Reflectin and reflectin mutant samples for solvent uptakeresearch_0184__mat__mat_reflectin_a1_wt | Powder · Paper Level Unspecified · Pristine Framework | 1-5 mg reflectin or mutant hydrated in H2O or D2O vapour at 90% RH immediately before TGA.platinum TGA pan | 7 · Water Uptake of Reflectin and Reflectin Mutants |
| Wild-type reflectin A1 thin film on SiO2/Si with gold electrodesresearch_0184__mat__mat_reflectin_a1_wt | Thin Film · Target Sample · Pristine Framework | Drop-cast and scribed rectangular film spanning electrode pair; measured under dry and humidified conditions.SiO2/Si with Cr/Au electrodes · 1.3 um for Supplementary Fig. 5 device | 15 · Supplementary Figure 5 caption · Supplementary Figure 5 |
| Wild-type reflectin A1 thin film on glass with gold electrodesresearch_0184__mat__mat_reflectin_a1_wt | Thin Film · Target Sample · Pristine Framework | Aqueous reflectin solution drop-cast onto electrodes, dried overnight in ambient air, excess material mechanically scribed.glass with Cr/Au electrodes · 4.6 um for Figure 1 device; 2.6 um for Figure 4 device | 597 · Figure caption · Figure 1 |
| Wild-type reflectin A1 thin film with palladium hydride electrodesresearch_0184__mat__mat_reflectin_a1_wt | Thin Film · Target Sample · Pristine Framework | Drop-cast reflectin film; Pd contacts exposed to 5% H2/95% Ar to form proton-injecting PdHx.SiO2/Si with Cr/Pd electrodes converted in situ to PdHx · 1.3 um for Figure 2 device; 0.8 um for Figure 3 wild-type comparison device | 598 · Results · Figure 2 |
| Wild-type reflectin A1 three-terminal protonic transistorresearch_0184__mat__mat_reflectin_a1_wt | Thin Film · Target Sample · Pristine Framework | Three-terminal device with reflectin channel and in situ formed PdHx contacts; measured at 90% RH.SiO2/Si with PdHx source/drain and Si gate · 1.1 um for Figure 5 device; representative Supplementary Fig. 12 devices 1.0, 1.3, and 1.5 um | 600 · Figure caption · Figure 5 |