Effects of Carbon Nanotubes on Photoluminescence Properties of Quantum Dots

The effects of carbon nanotubes (CNT) with different surface groups on the luminescence properties of mercaptoacetic acid-capped CdSe quantum dots (QD) are reported. Carboxyl-, hydroxyl-, and amine-modified CNTs are used to interact with water-soluble luminescent mercaptoacetic acid-capped CdSe QDs. TEM and ζ-potential analysis results show that CNT and QDs can be assembled into complex nanostructure by electrostatic interaction. The photoluminescence (PL) quenching of QDs caused by CNTs can be described by a Stern−Volmer-type equation as well as by a double-logarithmic equation. Significant differences in the values of binding constants KSV and Kb were found in these experiments. The binding constant for amine-terminated CNT is much higher compared to that of carboxyl- and hydroxyl-terminated CNTs. Dynamic quenching and photoluminescence resonance energy transfer between QDs and CNTs should be responsible for the quenching of photoluminescence emissions of QDs caused by CNTs with different groups. The st...

[1]  Shinsuke Sando,et al.  A quantum dot conjugated sugar ball and its cellular uptake. On the size effects of endocytosis in the subviral region. , 2004, Journal of the American Chemical Society.

[2]  D. Ritchie,et al.  A semiconductor source of triggered entangled photon pairs , 2006, Nature.

[3]  Xiaogang Peng,et al.  Experimental Determination of the Extinction Coefficient of CdTe, CdSe, and CdS Nanocrystals , 2003 .

[4]  A fluorescence resonance energy transfer sensor based on maltose binding protein. , 2003 .

[5]  Masato Yasuhara,et al.  Physicochemical Properties and Cellular Toxicity of Nanocrystal Quantum Dots Depend on Their Surface Modification , 2004 .

[6]  M. Shim,et al.  Functionalization of Carbon Nanotubes for Biocompatibility and Biomolecular Recognition , 2002 .

[7]  Sanjiv S Gambhir,et al.  Self-illuminating quantum dot conjugates for in vivo imaging , 2006, Nature Biotechnology.

[8]  Hiroshi Miyano,et al.  Detection and quantification of protein residues in food grade amino acids and nucleic acids using a dot-blot fluorescent staining method. , 2004, Journal of agricultural and food chemistry.

[9]  F. Gao,et al.  Effects of antisense-myc-conjugated single-walled carbon nanotubes on HL-60 cells. , 2007, Journal of nanoscience and nanotechnology.

[10]  Feng Gao,et al.  Study on interaction between poly(amidoamine) dendrimer and CdSe nanocrystal in chloroform. , 2006, Journal of colloid and interface science.

[11]  M. Prato,et al.  Translocation of bioactive peptides across cell membranes by carbon nanotubes. , 2004, Chemical communications.

[12]  Huajian Gao,et al.  Spontaneous insertion of DNA oligonucleotides into carbon nanotubes , 2003 .

[13]  F. Gao,et al.  Covalent attachment of quantum dot on carbon nanotubes , 2006 .

[14]  H. Dai,et al.  Nanotube molecular transporters: internalization of carbon nanotube-protein conjugates into Mammalian cells. , 2004, Journal of the American Chemical Society.

[15]  Eunkeu Oh,et al.  Inhibition assay of biomolecules based on fluorescence resonance energy transfer (FRET) between quantum dots and gold nanoparticles. , 2005, Journal of the American Chemical Society.

[16]  Ludovico Cademartiri,et al.  From colour fingerprinting to the control of photoluminescence in elastic photonic crystals , 2006 .

[17]  S. Cannistraro,et al.  Quenching and blinking of fluorescence of a single dye molecule bound to gold nanoparticles. , 2006, The journal of physical chemistry. B.

[18]  W. Jones,et al.  Studies of photoinduced electron transfer and energy migration in a conjugated polymer system for fluorescence "turn-on" chemosensor applications. , 2006, The journal of physical chemistry. B.

[19]  Xiaogang Peng,et al.  Formation of high-quality CdTe, CdSe, and CdS nanocrystals using CdO as precursor. , 2001, Journal of the American Chemical Society.

[20]  A Imre,et al.  Majority Logic Gate for Magnetic Quantum-Dot Cellular Automata , 2006, Science.

[21]  Igor L. Medintz,et al.  Fluorescence resonance energy transfer between quantum dot donors and dye-labeled protein acceptors. , 2003, Journal of the American Chemical Society.

[22]  V. L. Korenev,et al.  Optical Signatures of Coupled Quantum Dots , 2006, Science.

[23]  D. Cui.  Advances and prospects on biomolecules functionalized carbon nanotubes. , 2007, Journal of nanoscience and nanotechnology.

[24]  Toshiaki Hayashi,et al.  Bidirectional Counting of Single Electrons , 2006, Science.

[25]  Igor L. Medintz,et al.  Proteolytic activity monitored by fluorescence resonance energy transfer through quantum-dot–peptide conjugates , 2006, Nature materials.

[26]  Robert Godin,et al.  Free radical sensor based on CdSe quantum dots with added 4-amino-2,2,6,6-tetramethylpiperidine oxide functionality. , 2006, The journal of physical chemistry. B.

[27]  M. Sauer,et al.  Radiative and nonradiative rate fluctuations of single colloidal semiconductor nanocrystals. , 2006, The journal of physical chemistry. B.