Unusual Structural Morphology of Dendrimer/CdS Nanocomposites Revealed by Synchrotron X-ray Scattering

被引：12

作者：

Shtykoya, Eleonora V. ^{[2
]}

Kuchkina, Nina V. ^{[3
]}

Shifrina, Zinaida B. ^{[3
]}

Bronstein, Lyudmila M. ^{[1
]}

Svergun, Dmitri I. ^{[4
]}

机构：

[1] Indiana Univ, Dept Chem, Bloomington, IN 47405 USA

[2] Russian Acad Sci, Inst Crystallog, Moscow 117333, Russia

[3] Russian Acad Sci, AN Nesmeyanov Organoelement Cpds Inst, Moscow 119991, Russia

[4] Hamburg Outstn, EMBL, D-22603 Hamburg, Germany

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2012年 / 116卷 / 14期

关键词：

SMALL-ANGLE SCATTERING; IN-SITU; BIOLOGICAL MACROMOLECULES; METAL NANOPARTICLES; MONTE-CARLO; SAXS; STAR; POLYMERS; DYNAMICS; COMPLEXES;

D O I：

10.1021/jp210998h

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Low-resolution structure of CdS nanoparticles (NPs) grown in the presence of the third-generation rigid polyphenylenepyridyl dendrimers (PPPDs) is analyzed by synchrotron small-angle X-ray scattering (SAXS) and transmission electron microscopy (TEM). The combination of rigidity of the PPPDs and a high local concentration of chelating nitrogens strongly interacting with growing CdS NPs yields anisometric particles instead of conventional spherical ones. The scattering data from the free PPPDs and from the composite CdS/PPPD NPs are interpreted in terms of 3-D models revealing a peculiar morphology of the nanocomposite whereby the PPPDs enclose the CdS NPs like a "flattened ball-in-hands". The sizes of the CdS NPs found by SAXS are in good agreement with the TEM data. The presented approach to elucidate particle morphology should open the ways of detailed characterization of the modern composite materials from the SAXS data.

引用

页码：8069 / 8078

页数：10

共 60 条

[1]

[Anonymous], 1987, Structure Analysis by Small-Angle X-Ray and Neutron Scattering

[2]

[Anonymous], 1982, Small angle x-ray scattering, DOI DOI 10.1002/ACTP.1985.010360520

[3] Dendrimers Designed for Functions: From Physical, Photophysical, and Supramolecular Properties to Applications in Sensing, Catalysis, Molecular Electronics, Photonics, and Nanomedicine [J].

Astruc, Didier ;

Boisselier, Elodie ;

Ornelas, Catia .

CHEMICAL REVIEWS, 2010, 110 (04) :1857-1959

[4]

Baars MWPL, 2000, ANGEW CHEM INT EDIT, V39, P1285, DOI 10.1002/(SICI)1521-3773(20000403)39:7<1285::AID-ANIE1285>3.0.CO

[5]

2-F

[6] Regulation of in vitro gene expression using antisense oligonucleotides or antisense expression plasmids transfected using starburst PAMAM dendrimers [J].

Bielinska, A ;

KukowskaLatallo, JF ;

Johnson, J ;

Tomalia, DA ;

Baker, JR .

NUCLEIC ACIDS RESEARCH, 1996, 24 (11) :2176-2182

[7] SAXS study of chain-like structures formed by magnetic nanoparticles [J].

Bonini, Massimo ;

Fratini, Emillano ;

Baglioni, Piero .

MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS, 2007, 27 (5-8) :1377-1381

[8] Theoretical characterization of phenylene-based oligomers, polymers, and dendrimers [J].

Brocorens, P ;

Zojer, E ;

Cornil, J ;

Shuai, Z ;

Leising, G ;

Müllen, K ;

Brédas, JL .

SYNTHETIC METALS, 1999, 100 (01) :141-162

[9] Hybrid polymer particles with a protective shell: Synthesis, structure, and templating [J].

Bronstein, LM ;

Dixit, S ;

Tomaszewski, J ;

Stein, B ;

Svergun, DI ;

Konarev, PV ;

Shtykova, E ;

Werner-Zwanziger, U ;

Dragnea, B .

CHEMISTRY OF MATERIALS, 2006, 18 (09) :2418-2430

[10] Metalated diblock and triblock poly(ethylene oxide)-block-poly(4-vinylpyridine) copolymers:: Understanding of micelle and bulk structure [J].

Bronstein, LM ;

Sidorov, SN ;

Zhirov, V ;

Zhirov, D ;

Kabachii, YA ;

Kochev, SY ;

Valetsky, PM ;

Stein, B ;

Kiseleva, OI ;

Polyakov, SN ;

Shtykova, EV ;

Nikulina, EV ;

Svergun, DI ;

Khokhlov, AR .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (40) :18786-18798

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