Fig. 2From: Rational Design of Ni(OH)2 Hollow Porous Architecture for High-Sensitivity Enzyme-Free Glucose Sensora, b SEM and c, d TEM images of the Ni(OH)2 HPA; inset of c is the SAED pattern of Ni(OH)2 HPA. e Optical photographs of the reaction solution at different time after addition of etchant. f TEM images of the products monitored at different reaction time. g Schematic illustration of the proposed growth mechanism of Ni(OH)2 HPABack to article page