All articles starting with G

Gallium nitride on silicon

Gallium nitride on silicon (GaN-on-Si) is a semiconductor technology that grows gallium nitride on low-cost silicon wafers, combining GaN's high-voltage performance with silicon's manufacturing scale for 5G amplifiers and chargers.

Gallium nitride on silicon carbide

Gallium nitride on silicon carbide (GaN-on-SiC) is a semiconductor technology that grows GaN epitaxial layers on SiC substrates for high-power radio-frequency transistors and radar amplifiers.

Gallium oxide power devices

Gallium oxide power devices are semiconductor switches and rectifiers made from beta-phase gallium oxide (β-Ga₂O₃), whose high breakdown field exceeds silicon carbide and gallium nitride.

Gallium oxide power electronics

Gallium oxide power electronics are rectifiers and transistors built on beta-phase gallium oxide (β-Ga₂O₃), an ultra-wide-bandgap semiconductor promising lower conduction losses than silicon carbide or GaN devices.

Gallium oxide power transistors

Gallium oxide power transistors are field-effect transistors that use beta-phase gallium oxide, an ultra-wide-bandgap semiconductor, as the channel for high-voltage power switching and radio-frequency electronics.

Gallium phosphide

Gallium phosphide is an indirect-bandgap III-V semiconductor, transparent and orange in appearance, that drove commercial LED production in the early 1970s and now serves as an optical substrate.

Gallium selenide

Gallium selenide (GaSe) is a layered semiconductor crystal, known since 1934, used for infrared and terahertz laser frequency conversion and studied as a two-dimensional optoelectronic material.

Gallium sulfide

Gallium sulfide (GaS) is a layered III–VI monochalcogenide semiconductor with a bulk band gap of 2.35 eV that widens above 3 eV in monolayer form, studied for photodetectors, transistors, and catalysis.

Gallium-67

Gallium-67 is a radioactive isotope of gallium with a 78.3-hour half-life, used since 1969 in gallium scintigraphy to image tumors and inflammation, later displaced largely by FDG PET.

Gallium-68

Gallium-68 (^68Ga) is a positron-emitting radioactive isotope of gallium with a half-life of about 68 minutes, used to label PET tracers for neuroendocrine tumors and prostate cancer.

Sep 29, 2026

Gallium-68 DOTATATE PET-CT

Gallium-68 DOTATATE PET-CT, also known as 68Ga-DOTATATE PET/CT, is a nuclear medicine scan using a gallium-labeled somatostatin analog to image neuroendocrine tumors, FDA approved in 2016.

Gallium(III) oxide

Gallium(III) oxide (Ga₂O₃) is a compound of gallium and oxygen whose stable β phase has a roughly 4.8 eV bandgap and melt-grown crystals, enabling high-voltage power devices and solar-blind ultraviolet detection.

Sep 17, 2026

Gallo language

Gallo (galo, langue gallèse) is a Romance langue d'oïl of Upper Brittany, spoken in Ille-et-Vilaine, eastern Côtes-d'Armor and Morbihan, and Loire-Atlantique; 132,000 speakers in 2024, UNESCO seriously endangered, with a 2024–2027 regional revitalization plan.

Gallo-Roman amphitheater at Grannum

Gallo-Roman amphitheater at Grannum, the semi-amphitheater at Grand, Vosges, France: 148 m long, arena 50.8 x 34 m, capacity 16,000-17,000, serving the sanctuary town of Apollo Grannus in Gallia Belgica.

Gallo-Roman amphitheater at Montbouy

Gallo-Roman amphitheater at Montbouy (Amphithéâtre de Chenevières), a hybrid theatre-amphitheater in Loiret, France, with a 50.70 x 34.20 m elliptical arena, one-third-circle cavea, capacity of 4,000, classified Monument Historique in 1862.

Gallo-Roman Amphitheater of Agen

The Gallo-Roman amphitheater of Agen is the remains of a Roman amphitheater in Agen, France, in the ancient city of Aginnum, capital of the Nitiobroges, identified by excavation in 1989.

Gallo-Roman amphitheater-theater of Gennes

Gallo-Roman amphitheater-theater of Gennes (théâtre-amphithéâtre de Mazerolles), a 2nd-century AD semi-amphitheater with stage at Les Chataigniers, Maine-et-Loire, France; about 5,000 seats, classified monument historique 1986, part of a water-sanctuary complex with nymphaeum and aqueduct.

Gallo-Roman baths

Gallo-Roman baths: Roman-style bathhouses with hypocaust heating built in Gaul, especially NW Gaul (Belgium, northern France), 1st–4th century AD; rural villa baths, sanctuary baths, and urban thermae like the Cluny baths of Lutetia.

Gallo-Roman Sanctuary at Bû

Gallo-Roman sanctuary at Bû (Bois du Four à Chaux, Eure-et-Loir, France): a fanum complex with healing cult, eye ex-votos, two temple phases from the 1st to 4th century AD, excavated 1967–1983, classified Monument historique in 1986.

Gallo-Roman Settlement at Mamer

Gallo-Roman settlement at Mamer (Vicus Mambra), a Roman vicus at Mamer-Bertrange, Luxembourg, on the Reims–Arlon–Trier road, with thermal baths, strip houses, a dromedary well find, and excavations since 2008.

Gallo-Roman Structure at Moissac

The Gallo-Roman structure at Moissac is the bath block of a wealthy Roman villa in Moissac, France, preserving an intact hypocaust and walls up to 10 meters high.

Gallo-Roman structures at Perron

Gallo-Roman structures at Perron, Saint-Sauveur (Isère), France: probable villa and structures of the first three centuries CE, excavated April-September 1989 by H. de Klijn ahead of the A49 motorway, published 1994.

Gallo-Roman temple of Forêt d'Halatte (cne. Ognon, Oise)

Gallo-Roman healing sanctuary (fanum) in the Halatte forest, Ognon, Oise, near Senlis; built 48–60 AD, abandoned early 5th century; known for hundreds of limestone anatomical ex-voto and 1,127 coins.

Gallo-Roman theater at Alba Helviorum

Gallo-Roman theater at Alba Augusta Helviorum (Alba-la-Romaine, Ardèche), capital of the Helvii in Gallia Narbonensis: 50 m cavea enlarged to 73 m, ~3,000 seats, converted from Gallo-Roman to Roman type, restored and hosting shows.