odell-degenerately-2018.pdf (3.94 MB)
Degenerately hydrogen doped molybdenum oxide nanodisks for ultrasensitive plasmonic biosensing
journal contribution
posted on 2018-03-14, 00:00 authored by B Y Zhang, A Zavabeti, A F Chrimes, F Haque, Luke O'DellLuke O'Dell, H Khan, N Syed, R Datta, Yichao Wang, A S R Chesman, T Daeneke, K Kalantar-zadeh, J Z OuPlasmonic biosensors based on noble metals generally suffer from low sensitivities if the perturbation of refractive-index in the ambient is not significant. By contrast, the features of degenerately doped semiconductors offer new dimensions for plasmonic biosensing, by allowing charge-based detection. Here, this concept is demonstrated in plasmonic hydrogen doped molybdenum oxides (HxMoO3), with the morphology of 2D nanodisks, using a representative enzymatic glucose sensing model. Based on the ultrahigh capacity of the molybdenum oxide nanodisks for accommodating H+, the plasmon resonance wavelengths of HxMoO3are shifted into visible-near-infrared wavelengths. These plasmonic features alter significantly as a function of the intercalated H+concentration. The facile H+deintercalation out of HxMoO3provides an exceptional sensitivity and fast kinetics to charge perturbations during enzymatic oxidation. The optimum sensing response is found at H1.55MoO3, achieving a detection limit of 2 × 10−9m at 410 nm, even when the biosensing platform is adapted into a light-emitting diode-photodetector setup. The performance is superior in comparison to all previously reported plasmonic enzymatic glucose sensors, providing a great opportunity in developing high performance biosensors.
History
Journal
Advanced functional materialsVolume
28Issue
11Article number
1706006Pagination
1 - 13Publisher
John Wiley & SonsLocation
Chichester, Eng.Publisher DOI
Link to full text
ISSN
1616-301XeISSN
1616-3028Language
engPublication classification
C Journal article; C1 Refereed article in a scholarly journalCopyright notice
2018, WILEY‐VCH Verlag GmbH & Co. KGaA, WeinheimUsage metrics
Categories
No categories selectedKeywords
intercalationsemiconductor‐based plasmonicssensorstransition metal oxidetunable plasmonicsScience & TechnologyPhysical SciencesTechnologyChemistry, MultidisciplinaryChemistry, PhysicalNanoscience & NanotechnologyMaterials Science, MultidisciplinaryPhysics, AppliedPhysics, Condensed MatterChemistryScience & Technology - Other TopicsMaterials SciencePhysicssemiconductor-based plasmonicsRAMAN-SPECTRAMOO3GLUCOSERESONANCESALPHA-MOO3OXIDATIONBRONZESSERUMSPECTROSCOPYFABRICATION
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC