Figure 3
Experimental needle and substrate: (a) diagram of nozzle structure, (b) diagram of the nozzle, (c) diagram of the substrate, and (d) substrate contact angle measurement.
Figure 3 | Scientific Reports
Experimental needle and substrate: (a) diagram of nozzle structure, (b) diagram of the nozzle, (c) diagram of the substrate, and (d) substrate contact angle measurement.
