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Volumn 114, Issue 15, 2010, Pages 7007-7013

Structural implications on the electrohemical and spectroscopic signature of CdSe-ZnS Core-Shell quantum dots

Author keywords

[No Author keywords available]

Indexed keywords

ALKANETHIOLS; BAND GAP ENERGY; CDSE-ZNS; CHEMO-SENSORS; CORE DIAMETERS; CORE-SHELL QUANTUM DOTS; ELECTRON ACCEPTOR; EMISSION WAVELENGTH; EXPERIMENTAL OBSERVATION; IN-SHELL; LUMINESCENCE QUANTUM YIELDS; METHYL VIOLOGEN; OPTICAL BAND GAP ENERGY; ORGANIC LIGANDS; OXIDATION AND REDUCTION; PHOTO-INDUCED ELECTRON TRANSFER; QUANTUM DOT; QUENCHING RATE CONSTANT; RATIONAL DESIGN; REDOX POTENTIALS; REDUCTION POTENTIAL; SHELL THICKNESS; SPECTROSCOPIC SIGNATURES; STRUCTURAL FACTOR;

EID: 77951111605     PISSN: 19327447     EISSN: 19327455     Source Type: Journal    
DOI: 10.1021/jp1021032     Document Type: Article
Times cited : (42)

References (56)
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  • 33
    • 0037816199 scopus 로고    scopus 로고
    • The core diameter was estimated from the wavelength of the band gap absorption, according to a literature protool
    • The core diameter was estimated from the wavelength of the band gap absorption, according to a literature protool: Yu, W.; Qu, L.; Guo, W.; Peng, X. Chem. Mater. 2003, 15, 2854-2860
    • (2003) Chem. Mater. , vol.15 , pp. 2854-2860
    • Yu, W.1    Qu, L.2    Guo, W.3    Peng, X.4
  • 39
    • 77951130605 scopus 로고    scopus 로고
    • The shell thickness was determined by subtracting the core diameter, estimated according to ref 28, from the core-shell diameter, measured by transmission electron microscopy
    • The shell thickness was determined by subtracting the core diameter, estimated according to ref 28, from the core-shell diameter, measured by transmission electron microscopy.
  • 40
    • 77951104638 scopus 로고    scopus 로고
    • The differential pulse voltammogram of n -decanethiol, recorded under otherwise identical conditions, shows only an irreversible oxidation at +0.54 V vs Ag/AgCl (3 M KCl). Thus, the peaks (Figure 3) observed for dispersions of the quantum dots cannot be assoiated with free organic ligands present in solution and must be a result of the participation of the inorganic components in the redox proesses
    • The differential pulse voltammogram of n -decanethiol, recorded under otherwise identical conditions, shows only an irreversible oxidation at +0.54 V vs Ag/AgCl (3 M KCl). Thus, the peaks (Figure 3) observed for dispersions of the quantum dots cannot be assoiated with free organic ligands present in solution and must be a result of the participation of the inorganic components in the redox proesses.
  • 41
    • 77951115999 scopus 로고    scopus 로고
    • For reports on the voltammetric response of dispersions of CdSe quantum dots, see refs 24 and 27 and the following
    • For reports on the voltammetric response of dispersions of CdSe quantum dots, see refs 24 and 27 and the following
  • 44
    • 0042707902 scopus 로고    scopus 로고
    • For reports on the voltammetric response of films of CdSe quantum dots, see refs 24 and 25 and the following
    • For reports on the voltammetric response of films of CdSe quantum dots, see refs 24 and 25 and the following: Kucur, E.; Riegler, J.; Urban, G. A.; Nann, T. J. Chem. Phys. 2003, 119, 2333-2337
    • (2003) J. Chem. Phys. , vol.119 , pp. 2333-2337
    • Kucur, E.1    Riegler, J.2    Urban, G.A.3    Nann, T.4
  • 47
    • 77951099190 scopus 로고    scopus 로고
    • For reports on the voltammetric response of CdSe-ZnSe and CdSe-ZnS core-shell quantum dots, see
    • For reports on the voltammetric response of CdSe-ZnSe and CdSe-ZnS core-shell quantum dots, see
  • 51
    • 77951109969 scopus 로고    scopus 로고
    • For an investigation on ligand effects on the electrohemical response of CdSe quantum dots, see ref 25
    • For an investigation on ligand effects on the electrohemical response of CdSe quantum dots, see ref 25.
  • 53
    • 0004132708 scopus 로고
    • The free energy changes for the photoinduced electron transfer proesses were estimated with eq (; VCH: New York), using the redox potentials and optical band gap energies reported in Table 2 and a nanoparticle-quencher distance of 1.4 nm. Δ G° = e E Ox - e E Red - Δ E 00 - e 2 4 π ε 0 ε r d
    • The free energy changes for the photoinduced electron transfer proesses were estimated with eq (Kavarnos, G. J. Fundamentals of Photoinduced Electron Transfer; VCH: New York, 1993), using the redox potentials and optical band gap energies reported in Table 2 and a nanoparticle-quencher distance of 1.4 nm. Δ G° = e E Ox - e E Red - Δ E 00 - e 2 4 π ε 0 ε r d
    • (1993) Fundamentals of Photoinduced Electron Transfer
    • Kavarnos, G.J.1
  • 55
    • 77951123410 scopus 로고    scopus 로고
    • note
    • C for each complex was approximated to that of I measured at the highest c. I 0 I = 1 + K c k q = I 0 τ 0 I C - 1 τ 0


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