Biosensors Based on Nano-Gold/Zeolite-Modified Ion Selective Field-Effect Transistors for Creatinine Detection

Table 1 Physicochemical characteristics of used zeolites

Sample name	Structure	Si/Al^a	Particle size^b	S _BET, (m²/g)^c	S _ext, (m²/g)^d	Zeta potential, (mV)^e
Silicalite	MFI	No Al.	~470 nm	447	96	−62.6
BEA	BEA	21.5 ± 0.7	~1.2 μm	743	128	−47.9
BEA-Gold	BEA	21.0 ± 0.9	~1.2 μm	776	160	−47.2
Nano BEA	BEA	20.8 ± 0.8	~100 nm	696	183	−36.6