Table 3.

Summary of Significant Findings in FTIR of Pristine and Drug-Loaded Halloysite

		Halloysite Nanotubes (HNTs)
			Al2OH		OH–		Si–O–Si
		Wavelength (Peak Assignment)	3696 cm−1 (Asymmetric)	3621 cm−1 (Symmetric)	3643 cm−1 (Asymmetric)	1652 cm−1 (In-Plane)	1091 cm−1 (Asymmetric)	1033 cm−1 (In-Plane)
Drugs	Verapamil HCl	Shift	-	-	-	-	1000.68
		Remarks					Stretching
	Flurbiprofen	Shift					1025
		Remarks					Stretching
	Atenolol	Shift	-	-	-	-	-	-
		Remarks	Characteristic peaks are intact, no interaction observed.
	Furosemide	Shift	-	-	-	-	-	-
		Remarks	Characteristic peaks are intact, no interaction observed.