Hyper-Rayleigh scattering of CdS nanoparticles stabilized by inorganic heteropolyanions

Fu, Degang; Yu, Zhengtao; Liu, Juzheng; Zhang, Lu

doi:10.1016/s0167-577x(01)00388-3

Cited by 4 publications

(3 citation statements)

References 17 publications

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“…In spite of the tremendous research activity in the field of nanomaterials and nanosciences which has given birth to numerous nano-objects covering a wide range of chemical and physical properties (metallic or semiconducting nanoparticles, composite particles, molecular magnets, molecular wires, quantum dots, etc. ), the achievement of nanoparticles exhibiting strong quadratic optical nonlinearities is a recent topic, from which today only very rare examples are known. − Nonlinear optical (NLO) efficient nanoparticles offer a broad range of potential applications from nanoscale photonics to nanoprobes with original optical properties, ranging from fluorescence nanoprobes to second harmonic generation (SHG) nanosources . The goal of this article is to report how variations in the synthetic routes of hybrid organic−inorganic particles can affect their nonlinear optical properties as well as those of assemblies of nanoparticles embedded in a polymer film.…”

Section: Introductionmentioning

confidence: 99%

“…), the achievement of nanoparticles exhibiting strong quadratic optical nonlinearities is a recent topic, from which today only very rare examples are known. [1][2][3][4][5][6][7] Nonlinear optical (NLO) efficient nanoparticles offer a broad range of potential applications from nanoscale photonics to nanoprobes with original optical properties, ranging from fluorescence nanoprobes to second harmonic generation (SHG) nanosources. 8 The goal of this article is to report how variations in the synthetic routes of hybrid organic-inorganic particles can affect their nonlinear optical properties as well as those of assemblies of nanoparticles embedded in a polymer film.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Second Harmonic Generation Microscopy of Nonlinear Optical Efficient Hybrid Nanoparticles Embedded in Polymer Films. Evidence for Intra- and Internanoparticles Orientational Synergy

Delahaye

Sandeau

et al. 2009

J. Phys. Chem. C

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This work describes the synthesis and quadratic nonlinear optical properties of hybrid nanoparticles. These nanoparticles are based on the insertion of the push-pull 4-[2-(4-dimethylaminophenyl)azo]-1-methylpyridinium chromophore in the manganese hexathiohypodiphosphate MnPS 3 inorganic matrix. The included chromophores form J-aggregates responsible for second harmonic generation (SHG). The nanoparticles are characterized by infrared and UV-visible spectroscopy and by transmission electronic microscopy. The SHG efficiency of the particles dispersed in a polymer thin film is studied by polarized nonlinear microscopy, which permits probing of both the efficiency of the nanoparticles and their intrinsic molecular order. They are seen to assemble in 100-300 nm size agglomerates whose morphology, depending on the preparation, can lead to a collective optimal one-dimensional arrangement of the nanoparticles resulting from interparticles interactions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis and Second Harmonic Generation Microscopy of Nonlinear Optical Efficient Hybrid Nanoparticles Embedded in Polymer Films. Evidence for Intra- and Internanoparticles Orientational Synergy

Delahaye

Sandeau

et al. 2009

J. Phys. Chem. C

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“…The electric properties of cadmium sulfide clusters are currently of interest due to the dramatic increase of work on semiconductor particles and their potential applications in materials science . As applications vary from electronic/optical properties , to solar cell technology and DNA analysis, nanomaterials-oriented synthetic work on CdS clusters is actively pursued by many research groups. − The emergence of nonlinear susceptibility measurements on CdS clusters, nanoparticles, − and thin films of CdS nanocrystals is worth noticing. Little theoretical work has been published on (CdS) n .…”

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confidence: 99%

Size and Electric Dipole (Hyper)polarizability in Small Cadmium Sulfide Clusters: An ab Initio Study on (CdS)_n, n = 1, 2, and 4

Maroulis

Pouchan

2003

J. Phys. Chem. B

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We report conventional ab initio and B3LYP/DFT calculations for the static electric (hyper)polarizability of small CdS clusters. Our results indicate a strong reduction of the (per atom) mean dipole polarizability with size, supporting the recent LDA findings by Troparevsky and Chelicowsky [J. Chem. Phys. 2001, 114, 943]. The same trend is observed for the second dipole hyperpolarizability. The computational complexity of the determination of the electric properties varies considerably with cluster size. B3LYP and conventional ab initio values are not in good agreement for the monomer but the gap is drastically reduced for the dimer and the tetramer.The electric properties of cadmium sulfide clusters are currently of interest due to the dramatic increase of work on semiconductor particles and their potential applications in materials science. 1 As applications vary from electronic/optical properties 2,3 to solar cell technology 4 and DNA analysis, 5 nanomaterials-oriented synthetic work on CdS clusters is actively pursued by many research groups. 6-8 The emergence of nonlinear susceptibility measurements on CdS clusters, 9 nanoparticles, 10-12 and thin films of CdS nanocrystals 13 is worth noticing. Little theoretical work has been published on (CdS) n . The electric (hyper)polarizability of the monomer was studied by Raptis et al. 14 The structure of (CdS) n was investigated by Joswig et al. 15 We are aware of only one study on the polarizability of cadmium sulfide clusters, a pseudopotential approach based on the local density approximation (LDA). 16 Troparevsky and Chelikowsky 16 showed that the mean dipole polarizability per atom of (CdS) n decreases rapidly with cluster size, approaching the bulk limit of 23.7 e 2 a 0 2 E h -1 from the tetramer onward. The aim of this paper is to present conventional ab initio and density functional theory (DFT) results for the static dipole (hyper)polarizability of (CdS) n , n ) 1, 2, and 4. We have designed a basis of Gaussian-type functions (GTF) especially for this kind of molecular system. We expect to obtain clear indications for the performance and relative merit of these two important classes of theoretical methods in CdS cluster calculations. A most important part of our investigation is to offer a first aperçu on the nonlinear polarizability of small CdS clusters and to compare the observed trends to those available for the linear polarizability. Overall, given the scarcity of ab initio work on (CdS) n , we expect the present gleanings of computational experience to be of use to future endeavors by other researchers.A detailed presentation of the theoretical methods used in this paper may be found in standard references. 17-21 Thus, along with the self-consistent field (SCF) we rely on Møller-Plesset perturbation theory (MP) and coupled-cluster (CC) techniques. The MP based methods are MP2, SDQ-MP4, and MP4, second, partial, and complete fourth-order, respectively. The highest order methods are CCSD (single and double CC) and its † Permanent address:

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Preparation of colloidal solutions of noble metals stabilized by polyoxometalates and supported catalysts based on these solutions

et al. 2004

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Hyper-Rayleigh scattering of CdS nanoparticles stabilized by inorganic heteropolyanions

Cited by 4 publications

References 17 publications

Synthesis and Second Harmonic Generation Microscopy of Nonlinear Optical Efficient Hybrid Nanoparticles Embedded in Polymer Films. Evidence for Intra- and Internanoparticles Orientational Synergy

Synthesis and Second Harmonic Generation Microscopy of Nonlinear Optical Efficient Hybrid Nanoparticles Embedded in Polymer Films. Evidence for Intra- and Internanoparticles Orientational Synergy

Size and Electric Dipole (Hyper)polarizability in Small Cadmium Sulfide Clusters: An ab Initio Study on (CdS)_n, n = 1, 2, and 4

Preparation of colloidal solutions of noble metals stabilized by polyoxometalates and supported catalysts based on these solutions

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Hyper-Rayleigh scattering of CdS nanoparticles stabilized by inorganic heteropolyanions

Cited by 4 publications

References 17 publications

Synthesis and Second Harmonic Generation Microscopy of Nonlinear Optical Efficient Hybrid Nanoparticles Embedded in Polymer Films. Evidence for Intra- and Internanoparticles Orientational Synergy

Synthesis and Second Harmonic Generation Microscopy of Nonlinear Optical Efficient Hybrid Nanoparticles Embedded in Polymer Films. Evidence for Intra- and Internanoparticles Orientational Synergy

Size and Electric Dipole (Hyper)polarizability in Small Cadmium Sulfide Clusters: An ab Initio Study on (CdS)n, n = 1, 2, and 4

Preparation of colloidal solutions of noble metals stabilized by polyoxometalates and supported catalysts based on these solutions

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Size and Electric Dipole (Hyper)polarizability in Small Cadmium Sulfide Clusters: An ab Initio Study on (CdS)_n, n = 1, 2, and 4