Level 1:
CarbonCatalyticEnergyFabricationMaterial compositionMorphologyNano biologyNano detectionNano deviceNano unitSemiconductorSynthesisTheory
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Level 2:
ALLAlloysCompoundsGasII-IVIodideIonsMetalsNitridesOxidesPhosphideSulfide
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Level 3:
ALLAlloyingAlloying elementsAluminum alloysBinary alloysCarbidesChromium alloysCobalt alloysCopper alloysGold alloysIron alloysLithium alloysMolybdenum alloysNickel alloysPalladium alloysPlatinum alloysRhodium alloysSilver alloysSodium alloysTernary alloysUranium alloysZinc alloys
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