▎ 摘　　要

NOVELTY - A 15-methylheptacyclo(20.8.0.02,11.03,8.012,21.014,19.025,30)triaconta-1(22),2(11),3,5,7,9,12(21),13,15,17,19,23,25,27,29-pentadecaene precursor molecule (I), is new. USE - New 15-methylheptacyclo(20.8.0.02,11.03,8.012,21.014,19.025,30)triaconta-1(22),2(11),3,5,7,9,12(21),13,15,17,19,23,25,27,29-pentadecaene precursor molecule is used for manufacturing armchair-type graphene nanoribbons for graphene nanodevice (all claimed) used for electronic device. ADVANTAGE - The 15-methylheptacyclo(20.8.0.02,11.03,8.012,21.014,19.025,30)triaconta-1(22),2(11),3,5,7,9,12(21),13,15,17,19,23,25,27,29-pentadecaene precursor molecule enables manufacture of armchair-type graphene nanoribbons having excellent stability, and physical property, such as ballistic conduction effect and half-integer quantum Hall effect. DETAILED DESCRIPTION - A 15-methylheptacyclo(20.8.0.02,11.03,8.012,21.014,19.025,30)triaconta-1(22),2(11),3,5,7,9,12(21),13,15,17,19,23,25,27,29-pentadecaene precursor molecule of formula (I), is new. n1,n2 = 0-5; X = halo (a); Y' = halo (b) having atomic weight less than that of the halo (a); Z1 = H, or halo (c) having atomic weight less than that of the halo (a); Z2 = H, or halo (d) having atomic weight less than that of the halo (a);and R = H, OH, SH, NH2, CH3, or OCH3. INDEPENDENT CLAIMS are included for the following: (1) graphene nanoribbons (13), which comprise a repeating unit of the precursor molecule (I), in which an edge structure at both ends along the length direction is armchair-type edge structure; and (2) manufacture of graphene nanoribbons, which involves heating the several precursor molecules (I) at a temperature (t1) to induce desorption of halogen (a) and carbon-carbon double bond reaction to obtain a polymer, and heating the polymer at a temperature (t2) more than the temperature (t1) to induce desorption of halogen (b) and carbon-carbon double bond reaction to obtain graphene nanoribbons. DESCRIPTION OF DRAWING(S) - The drawing shows a sectional view of the graphene nanodevice. Substrate (11) Metal film (12) Graphene nanoribbons (13) Electrodes (14,15,16) Insulating film (17)