Table 2.

Number of highly cited publications (Ph) and international highly cited publications (IPh) by research field and time period

	Ribozyme_c		Ozone_c		Fullerene_c		BET_c
Time period	IPh	Ph	IPh	Ph	IPh	Ph	IPh	Ph
T1	2	14	14	186	1	6	0	1
T2	2	26	21	219	1	7	0	2
T3	10	48	44	231	1	20	0	2
T4	10	81	41	265	10	85	0	3
T5	16	124	63	338	87	559	4	19
T6	17	176	101	400	153	681	12	88
T7	25	188	123	378	182	581	43	175
T8	37	197	136	422	188	509	74	310
T9	41	227	218	438	191	502	103	459
T10	50	261	238	445	161	481	98	516
T11	70	284	226	444	206	445	143	621
T12	54	253	202	392	136	370	145	630
Total	334	1879	1427	4158	1317	4246	622	2825