Abstract

The photoluminescence (PL) parties of inorganic, charge transfer sensitizers anchored to nanometer sized metal oxide particles are presented. The charge transfer sensitizers are inorganic coordination compounds such as ruthenium tribipyridine, Ru(bpy)32+, which have long lived metal-to-ligand charge transfer (MLCT) excited states. The metal oxides are insulators or semiconductor materials in the form of powders, colloidal solutions, and porous nanocrystalline films. Time resolved PL decays from this and related sensitizers anchored to metal oxide surfaces are highly non-exponential. The MCT exited states are quenched on semiconducting metal oxide particles by an apparent electron transfer mechanism. With some assumptions electron transfer rates from the MLCT excited states to the nanostructured surface are calculated. The PL properties of sensitizers bound to porous nanocrystalline TiO2 films can be controlled.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Biotechnology Resource Grants (P41)
Project #
5P41RR008119-04
Application #
5225689
Study Section
Project Start
Project End
Budget Start
Budget End
Support Year
4
Fiscal Year
1996
Total Cost
Indirect Cost

  Publications

Piao, Wenji; Shirey, Kari Ann; Ru, Lisa W et al. (2015) A Decoy Peptide that Disrupts TIRAP Recruitment to TLRs Is Protective in a Murine Model of Influenza. Cell Rep 11:1941-52
Hartman, Kira G; McKnight, Laura E; Liriano, Melissa A et al. (2013) The evolution of S100B inhibitors for the treatment of malignant melanoma. Future Med Chem 5:97-109
Fu, Yi; Zhang, Jian; Lakowicz, Joseph R (2009) Highly efficient detection of single fluorophores in blood serum samples with high autofluorescence. Photochem Photobiol 85:646-51
Zhang, Jian; Badugu, Ramachandram; Lakowicz, Joseph R (2008) Fluorescence Quenching of CdTe Nanocrystals by Bound Gold Nanoparticles in Aqueous Solution. Plasmonics 3:3-11
Ray, Krishanu; Szmacinski, Henryk; Enderlein, Joerg et al. (2007) Distance dependence of surface plasmon-coupled emission observed using Langmuir-Blodgett films. Appl Phys Lett 90:251116
Chowdhury, Mustafa H; Malyn, Stuart N; Aslan, Kadir et al. (2007) First Observation of Surface Plasmon-Coupled Chemiluminescence (SPCC). Chem Phys Lett 435:114-118
Zhang, Jian; Fu, Yi; Chowdhury, Mustafa H et al. (2007) Enhanced Forster Resonance Energy Transfer on Single Metal Particle. 2. Dependence on Donor-Acceptor Separation Distance, Particle Size, and Distance from Metal Surface. J Phys Chem C Nanomater Interfaces 111:11784-11792
Zhang, Jian; Fu, Yi; Lakowicz, Joseph R (2007) Luminescent images of single gold nanoparticles and their labeling on silica beads. Opt Express 15:13415-20
Ray, Krishanu; Badugu, Ramachandram; Lakowicz, Joseph R (2007) Polyelectrolyte Layer-by-Layer Assembly To Control the Distance between Fluorophores and Plasmonic Nanostructures. Chem Mater 19:5902-5909
Matveeva, Evgenia G; Gryczynski, Ignacy; Barnett, Anne et al. (2007) Metal particle-enhanced fluorescent immunoassays on metal mirrors. Anal Biochem 363:239-45

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