Fig. 1From: Dual-sensitive and highly biocompatible O-carboxymethyl chitosan nanodroplets for prostate tumor ultrasonic imaging and treatmentCharacteristics of O-CS-DOX NDs. a, b SEM and TEM images of O-CS-DOX NDs. c, d Light and fluorescence microscopic images of O-CS-DOX NDs. e, f The size distribution and zeta potential of O-CS-DOX NDsBack to article page