vanadium dioxide
E484701
Vanadium dioxide is an inorganic compound best known for its dramatic, reversible metal–insulator phase transition near room temperature, which makes it a key material in studies of correlated electron systems and smart thermochromic devices.
All labels observed (1)
| Label | Occurrences |
|---|---|
| vanadium dioxide canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4975795 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: vanadium dioxide Context triple: [Mott transition, observedIn, vanadium dioxide]
-
A.
Vanadium
Vanadium is a hard, silvery-gray transition metal element used in strong alloys and known for imparting green coloration to certain minerals and gemstones.
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B.
Kapton
Kapton is a high-performance polyimide film known for its exceptional thermal stability, electrical insulation, and durability in extreme environments such as outer space.
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C.
Esaki diode
The Esaki diode is a heavily doped semiconductor tunnel diode that exhibits negative differential resistance, enabling high-speed and microwave-frequency electronic applications.
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D.
Grätzel cell
A Grätzel cell is a dye-sensitized solar cell that mimics photosynthesis to convert light into electricity using organic dyes and nanostructured materials.
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E.
Mott transition
The Mott transition is a metal–insulator transition in strongly correlated electron systems, where electron–electron interactions drive a material from conducting to insulating behavior without a change in its crystal structure.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: vanadium dioxide Target entity description: Vanadium dioxide is an inorganic compound best known for its dramatic, reversible metal–insulator phase transition near room temperature, which makes it a key material in studies of correlated electron systems and smart thermochromic devices.
-
A.
Vanadium
Vanadium is a hard, silvery-gray transition metal element used in strong alloys and known for imparting green coloration to certain minerals and gemstones.
-
B.
Kapton
Kapton is a high-performance polyimide film known for its exceptional thermal stability, electrical insulation, and durability in extreme environments such as outer space.
-
C.
Esaki diode
The Esaki diode is a heavily doped semiconductor tunnel diode that exhibits negative differential resistance, enabling high-speed and microwave-frequency electronic applications.
-
D.
Grätzel cell
A Grätzel cell is a dye-sensitized solar cell that mimics photosynthesis to convert light into electricity using organic dyes and nanostructured materials.
-
E.
Mott transition
The Mott transition is a metal–insulator transition in strongly correlated electron systems, where electron–electron interactions drive a material from conducting to insulating behavior without a change in its crystal structure.
- F. None of above. chosen
Statements (53)
| Predicate | Object |
|---|---|
| instanceOf |
inorganic compound
ⓘ
vanadium oxide ⓘ |
| canBeDopedWith |
fluorine
ⓘ
niobium ⓘ tungsten ⓘ |
| changesInfraredTransmittanceNear | metal–insulator transition temperature ⓘ |
| chemicalFormula | VO2 ⓘ |
| containsElement |
oxygen
ⓘ
vanadium ⓘ |
| exhibits | metal–insulator transition ⓘ |
| hasBandGapInInsulatingPhaseApprox | 0.6 eV ⓘ |
| hasCrystalSystemHighTemperature | tetragonal ⓘ |
| hasCrystalSystemLowTemperature | monoclinic ⓘ |
| hasIUPACName | vanadium(IV) oxide ⓘ |
| hasOxidationStateOfVanadium | +4 ⓘ |
| hasSpaceGroupHighTemperature | P4_2/mnm ⓘ |
| hasSpaceGroupLowTemperature | P2_1/c ⓘ |
| highTemperatureCrystalStructure | rutile tetragonal ⓘ |
| highTemperaturePhaseIs | metallic ⓘ |
| isElectrically | correlated electron material ⓘ |
| isPrototypeFor |
Mott transition materials
ⓘ
Peierls transition materials ⓘ |
| isPrototypeMaterialFor |
metal–insulator transition studies
ⓘ
strongly correlated electron systems ⓘ |
| isSensitiveTo |
doping
ⓘ
electric field ⓘ optical excitation ⓘ strain ⓘ |
| isStudiedInField |
condensed matter physics
ⓘ
device physics ⓘ materials science ⓘ solid-state physics ⓘ surface science ⓘ |
| isThermochromic | true ⓘ |
| isUsedAs |
model system for electron–lattice coupling studies
ⓘ
model system for ultrafast phase transitions ⓘ |
| isUsedIn |
electronic switches
ⓘ
energy-efficient glazing ⓘ infrared switching devices ⓘ memory devices research ⓘ neuromorphic devices research ⓘ optical switches ⓘ sensors ⓘ smart windows ⓘ thermochromic coatings ⓘ |
| lowTemperatureCrystalStructure | monoclinic ⓘ |
| lowTemperaturePhaseIs | insulating ⓘ |
| metalInsulatorTransitionIs |
first-order phase transition
ⓘ
reversible ⓘ |
| metalInsulatorTransitionTemperatureApprox |
340 K
ⓘ
68 °C ⓘ 95 °F ⓘ |
| tungstenDopingEffect | lowers transition temperature ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: vanadium dioxide Description of subject: Vanadium dioxide is an inorganic compound best known for its dramatic, reversible metal–insulator phase transition near room temperature, which makes it a key material in studies of correlated electron systems and smart thermochromic devices.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.