Analysis of the heterogeneous structure of iron oxide/gold nanoparticles and their application in a nanosensor

Colorimetric Analysis of Glucose Oxidase-Magnetic Cellulose Nanocrystals (CNCs) for Glucose Detection

“…This result is in agreement with the previous literature stating that the length of CNCs normally falls within the range of tens of nanometers to several micrometers, while width ranges from 3 nm to 50 nm [21]. As depicted in Figure 1b, IONPs were spherical in shape with diameter of approximately 12.9 ± 6.56 nm, slightly larger from the previous study [20]. The TEM image in Figure 1c shows that IONPs were successfully attached on CNCs since sphere grains of IONPs are clearly seen attached along the nanorods CNCs but the distribution was not uniform.…”

“…Finally, CNCs were washed thoroughly with distilled water (dH 2 O) and freeze-dried. On the other hand, IONPs were synthesized by reverse co-precipitation technique as reported in Reference [20]. After that, approximately 50 mg of CNCs were dispersed in 50 mL of deionized water and 10 mL of IONPs were added and stirred vigorously at room temperature for 2 h. The resulting hybrid nanomaterials were then separated with an external magnet and re-dispersed in 50 mL of deionized water for further use.…”