Document Detail

Construction of dentate bonded TiO2-CdSe heterostructures with enhanced photoelectrochemical properties: versatile labels toward photoelectrochemical and electrochemical sensing.
MedLine Citation:
PMID:  25408238     Owner:  NLM     Status:  Publisher    
A facile synthetic route for TiO2-CdSe heterostructures was proposed based on dentate binding of TiO2 to carboxyl. Carboxyl functionalized CdSe quantum dots (CF-CdSe QDs) were successfully bonded onto TiO2 nanoparticles (NPs), which could significantly improve the photoelectrochemical (PEC) properties of TiO2 NPs. This is ascribed to the fact that CdSe QDs with a narrow band gap could be stimulated under visible light irradiation, and the energy levels of TiO2 NPs and CF-CdSe QDs are aligned with an electrolyte solution. High resolution transmission electron microscopy images revealed the heterostructures of the TiO2-CdSe composites. Ultraviolet visible spectroscopy, photoluminescence emission spectroscopy and electrochemical impedance spectroscopy analysis exhibited that the prepared TiO2-CdSe heterostructures have improved light absorption, charge separation efficiency and electron transfer ability in the visible light region. TiO2-CdSe heterostructures were used as versatile labels for fabrication of PEC and electrochemical immunosensors, and human immune globulin G (HIgG) was used as a model analyte. The immunosensor showed high sensitivity, a low detection limit and a wide linear range, which could be applied in practical serum sample analysis. The constructed TiO2-CdSe heterostructures would have potential applications in photocatalysis, aptasensors, cytosensors and other areas of nanotechnology.
Picheng Gao; Hongmin Ma; Tao Yan; Dan Wu; Xiang Ren; Jiaojiao Yang; Bin Du; Qin Wei
Related Documents :
3351358 - Microtubules in the spermatids of stick insects.
1431298 - On the morphology of the oxyurid nematode pharyngodon mamillatus (linstow, 1897) from c...
21981508 - Dynamic evanescent phonon coupling across the la_{1-x}sr_{x}mno_{3}/srtio_{3} interface.
25146378 - Thiocyanate-free ruthenium(ii) sensitizers for dye-sensitized solar cells based on the ...
15388148 - Comparison of a digital and an analog signal processing system for neutron inelastic ga...
14531058 - Theoretical approach to the mechanism of reactions between halogen atoms and unsaturate...
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-11-13
Journal Detail:
Title:  Dalton transactions (Cambridge, England : 2003)     Volume:  -     ISSN:  1477-9234     ISO Abbreviation:  Dalton Trans     Publication Date:  2014 Nov 
Date Detail:
Created Date:  2014-11-19     Completed Date:  -     Revised Date:  2014-11-20    
Medline Journal Info:
Nlm Unique ID:  101176026     Medline TA:  Dalton Trans     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Supported lipid bilayers as dynamic platforms for tethered particles.
Next Document:  Serum adiponectin relates to shortened overall survival in men with squamous cell esophageal cancer ...