Fig. 4From: Remote-controllable bone-targeted delivery of estradiol for the treatment of ovariectomy-induced osteoporosis in ratsTEM (a) and SEM (b) images of inductively-heated PEG-PLGA-AL@E2 NPs, PEG-PLGA@Fe3O4/E2 NPs and PEG-PLGA-AL@Fe3O4/E2 NPs up to 45 °C. Experiments were carried out using a frequency of 170 kHzBack to article page