Hierarchical Nanoflowers on Nanograss Structure for a Non-wettable Surface and a SERS Substrate

Table 2 Raman spectroscopy

CuO nanoflower Ag 80 nm	CuO nanoflower Ag 20 nm	Ag mirror [30]	4-Mpy solid [36, 37]	CuO [28]	Assignment [36–38]
1013	1010	1010	989		Ring breathing
			1044	1022	β(CH)
1061	1061	1061	1080	1059	β(CH)
1097	1098	1097	1106	1106	Ring breathing/C-S
1215	1218	1219	1200	1208	β(CH)/(NH)
			1249		β(CH)
1273, 1330		1271	1288		β(CH)
1377, 1404			1394		ν(CC)
1467			1457		ν(C=C/C=N)
1516			1478		ν(C=C/C=N)
1582	1580	1580	1604	1584	ν(CC)
1608		1612	1612		ν(CC)