Journal
ANALYTICA CHIMICA ACTA
Volume 840, Issue -, Pages 68-74Publisher
ELSEVIER
DOI: 10.1016/j.aca.2014.05.027
Keywords
CdTe quantum dots; Au nanoparticles; Silica mesoporous microspheres; Enzyme-mimic nanosensor
Categories
Funding
- National Natural Science Foundation of China [21075050, 21005029]
Ask authors/readers for more resources
QD-Au NP@silica mesoporous microspheres have been fabricated as a novel enzyme-mimic nanosensor. CdTe quantum dots (QDs) were loaded into the core, and Au nanoparticles (NPs) were encapsulated in the outer mesoporous shell. QDs and Au NPs were separated in the different space of the nanosensor, which prevent the potential energy or electron transfer process between QDs and Au NPs. As biomimetic catalyst, Au NPs in the mesoporous silica shell can catalytically oxidize glucose as glucose oxidase (GOx)-mimicking. The resultant hydrogen peroxide can quench the photoluminescence (PL) signal of QDs in the microsphere core. Therefore the nanosensor based on the decrease of the PL intensity of QDs was established for the glucose detection. The linear range for glucose was in the range of 5-200 mu M with a detection limit (3 sigma) of 1.32 mu M. (C) 2014 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available