Fig. 1. Principle of protein-chip detection. (a) Chip structure; (b) detection principle

Fig. 2. Experimental setup. (a) Block diagram; (b) prototype photo

Fig. 3. AFM of glass substrate. (a) Unmodified; (b) modified

Fig. 4. Infrared Fourier transform spectrum of glass substrate modified by APTES

Fig. 5. Nanometer quantum dot biochip array. (a) Surface, the inset is an array unit photo; (b) fluorescence, the inset is a fluorescent image

Fig. 6. Nanometer quantum dot biochip array unit. (a)-(c) Photos; (d)-(f) fluorescent images after binding antibodies; (g)-(i) fluorescent images after binding antigens on antibody substrate

Fig. 7. Relationship between NGF concentration and fluorescence peak intensity. (a) 0-100 ng·mL-1; (b) partial enlargement