Document Detail

Vanadium oxide nanoparticles as optical sensors of cysteine.
MedLine Citation:
PMID:  21770095     Owner:  NLM     Status:  In-Process    
We report on the synthesis of vanadium oxide nanoparticles using the laser ablation in solution technique. The particles were characterized by dynamic light scattering-DLS, transmission electron microscopy-TEM, X-ray diffraction-XRD, X-ray photoelectron spectroscopy-XPS and UV-Vis optical spectroscopy. The oxide nanoparticles are mainly composed of tetragonal V2O5, a semiconductor with a 2.2 eV band gap. The interaction of the nanoparticles with cysteine, a very important aminoacid present in proteins, was studied. Upon reaction with cysteine, the bandgap of the nanoparticles shifts to the ultraviolet region at 2.87 eV. This color change from yellow to transparent can be used for selective cysteine sensing. Additionally, the intervalence band of the optical absorption spectra shows capability for cysteine sensing in the microM range.
W Celestino-Santos; A G Júnior Bezerra; A B Cezar; N Mattoso; W H Schreiner
Related Documents :
22129765 - Apoferritin-ceo(2) nano-truffle that has excellent artificial redox enzyme activity.
22756265 - Su-e-t-85: dose rate and energy dependence of ebt, ebt2, edr2 films, and mapcheck2 diod...
2681705 - Microscopic examination of embrittled pin-retained base metal casting.
22309165 - Intensity enhancement of weak o2a1Δg→x3Σg-emission at 1270 nm by collisions with fo...
3886915 - Systematic inquiry in tests of negative/positive replica combinations for sem.
15323775 - Spectroscopic link between adsorption site occupation and local surface chemical reacti...
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of nanoscience and nanotechnology     Volume:  11     ISSN:  1533-4880     ISO Abbreviation:  J Nanosci Nanotechnol     Publication Date:  2011 Jun 
Date Detail:
Created Date:  2011-07-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101088195     Medline TA:  J Nanosci Nanotechnol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  4702-7     Citation Subset:  IM    
Departamento de Física, Universidade Federal do Paraná, Centro Politécnico, Jardim das Américas, 81531-880 Curitiba, Paraná, Brazil.
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:  Immobilization of uricase enzyme on self-assembled gold nanoparticles for application in uric acid b...
Next Document:  Single-walled carbon nanotubes coupled with near-infrared laser for inactivation of bacterial cells.